Tunit diesel performance, increase bhp, torque and get better fuel economy

Customer Testimonials

All the following testimonials are completely independent of Tunit and have been used with the authors permission.

Alfa Romeo

Recieved June 2007 via email, Alfa Romeo GT 1.9 JTD

Dear Mr Johnston,

The tunit box is fantastic, there now seems to be loads more power throughout the rev range and the noticeable turbo lag that was there before has all but gone. Also the average fuel consumption has improved by about 3-4 mpg! It's also good how easy the box is to remove if need be, 10 minute job. It really has increaed my enjoyment of the car, I really can't fault it, worth every penny.

Regards

RR

Audi

Recieved 13th Sept 2007 via email, Audi A4 1.9 TDI-PD

Thanks for all your help on Monday, I didn’t appreciate the difference in my car until yesterday. Getting into it after not driving for 24 hours was a revelation. Cold starting did not produce the usual black smoke, there was no hesitation when moving off form standstill and the throttle response was much quicker with VERY smooth acceleration. So smooth that my wife commented on it. The improvement to torque at low revs means that the car will trickle along in 3rd gear without throttle, even up a slight incline! All in all Tunit is worth every penny.
M. Bland
Newcastle –Upon-Tyne

Recieved 30th Jul 2007 via email, Audi A6 3.0 TDI

This is my fourth Audi TDi and my first A6. I opted for the 3.0Tdi Quattro SE Avant as it rides a little higher than the S-Line which helps when towing my caravan. When reading reviews the A6 was criticised for a firm ride so I had the adaptive air suspension fitted and it is superb, in comfort mode it floats along and gives a superb ride, however for a sporty ride just set it to dynamic. This is my first automatic and the tiptronic is a dream to use with apparently seamless shifting, you can over ride it at anytime with the shift paddles giving you total control. I had my 3 previous TDi's superchipped but this time I have gone for the Tunit unit which I had fitted at Tunit Chorley along with a K+N Filter. If you sell the car you can take it off in minutes and Tunit will give you a part ex allowance if it is not compatible with your new car. It now punches out 275 bhp and the power delivery is smooth and instant.

A. Preston

Bolton

BMW

Received June 2007 via email, BMW 530d

Hi John

Just a quick note to say...

Tunit fitted easily & quickly, gives a truly noticeable & impressive performance increase...worth every penny. Your help & advice was also excellent. Many thanks.

Regards

PS

Recieved 18th Nov 2004 via email, BMW 1 series

Hi Michael,

just thought I'd drop you a mail to say how things are going with the car. So far, no problems whatsoever; well, not true actually - if I continue driving it the way I have been, I'll loose my license!

Power delivery is very smooth, and it definitely revs longer - in fact, it's much more like a petrol engine at the top end. comparitively, on a twisty road, I think I could keep up with my Boxster S - would be left on the straights, but through the bends... all that torque wins ! And the car is superbly balanced.

Fuel consumption has dropped to 42mpg, but I've only been doing short journeys, so can't really comment upon that being the true average.

Once again, thanks for your hospitality on my visit to Chorley - it was good to see what really goes on in the tuning world!

Look forward to reading Victors article.

Regards David Willis

Philip Hunt, via Email, Monday June 14th 2004, BMW 330D

I called in last week and decided to go-ahead with yourselves fitting the unit to my BMW 330D. after a short while (approx 30 mins), my car was fitted with the unit and ready to go.I could not believe the instant response as soon as I accelerated, as, with most diesels, the turbo lag was obvious before fitting of the tunit.....to my amazement, this turbo-lag has been completely eliminated, giving my car instant acceleration. This was my main objective with this already powerful car, and after driving back home, I was totally convinced of the improvement both in economy and power. it feels as though i have had a completely new more powerful engine fitted, as the power range through the gearbox (auto) is smoother and about 30-40% quicker!!! to make matters even more immpressive, I have noticed approx. 12 mpg gain. this is a true reading on my on-board-computer, and I have now worked out that it will take me about 6-7 months of driving to "get-my-money-back" on this faultless unit! what more can I say. absolutely thrilled with the product and I would recommend it to everyone.

P. Hunt

Southport

Ford

Received January 2007 via hand-written letter, Ford Ranger TD

John

Just a line to enclose with the product registration form to let you know that Simon at West Auckland fitted the tunit and we are very pleased with it.

The pick-up is "on top of it's work" all the time and running very smoothly - it has pulled the livestock trailer to market several times.

From

BS

Hexham

Received 28th August 2006 via email, Ford Mondeo TDCi 130bhp auto

Dear Mr Bromley

I recently purchased a TUNIT for my Mondeo 130bhp Automatic
station wagon. I noticed an improvement in performance, smoothness and
fuel consumption immediately after fitting but it was not until I did
the round trip to UK last week that I really saw the difference. I drove
3500Km in seven days my average consumption was 6.5l per 100 km,
previous trips gave 7.2l per 100 km an improvement of 9.7%. The extra
power available was particularly noticeable when climbing the quite
steep hills on the French Auto route resulting in a much more relaxed
journey. I would like to congratulate you on a very good product.

Regards Stephen

From Robert Beeton via email - 11th March 2004, Ford Focus TDCi 115

I've recently added a tunit V-CR to my Focus TDCI 115 and the results are truly satisfying. With the jumper set to the higest power setting my focus (already well run in) managed 148bhp (121 before) at 3800rpm and 223lb.ft of torque (190 before) at 2200 rpm on a dyno. 0 - 60 has been measured in the dry at 8.3 secs (2 secs quicker than standard) thanks to 7% ish longer gearing courtesy of 17.5" rims, taking 3 gears to do so.

Pulls impressively well from 1250 rpm, especially noticable in 4th and 5th gears.

I've backed the jumper off two settings and made do with slightly less power for now and fuel economy really is significantly higher thanks to the substantially stronger high gear pull. I was previously averaging 45mpg over a tank, mostly urban runs of 12 miles or less but including weekly motorway runs of 120 miles.

Motorway cruising is easier and smoother (I do not know why) And at 75 mph on good road a truly ridiculous figure of 69.0 mpg showed on my trip computer after 60 miles.

A few tanks of fuel later, and without paying too much attention to what my right foot is doing the car easily does 500+ miles on about 48 litres of diesel at about 52 mpg in mixed driving conditions, 7 mpg more than pre-tunit and 2.5 mpg more than ford say the focus on big hoops will do.

 

Hino

Received 22nd November 2007 via email

Hey Dan,
You are now my bestest pal in the whole world...and all that!


After me ordering the box on the phone from you, it came well inside 24 hours and I fitted it myself after my first load at 06.00 in the dark, which is why it took about 3 minutes including tilting the cab!


I have used it for one day on factory setting 5 to get used to the extra grunt the truck now has and will turn it up bit by bit. It is very noticeable that it has more power now because I can skip 3-4 gears when fully loaded changing up which is very strange (but I can get used to it!).


I'll give it a go for a while playing with it and let you know by phone or computer message how I get on.


Again thanks mate I think for the money it cost I'm glad I didn't go for the re-map.

All the best fella
Mark Sullivan

 

Jeep

Received 18th August 2006 via email, Jeep 2.8CRD

Dan,

Tunit arrived in good time and was very easy to fit, the small picture
helped a treat! On the first outing, with the dial still set at 5, the
Jeep's MPG reading steadily rose and kept rising for about 150 miles or
so giving me about 5 miles per gallon extra.
With the dial set on at a lower number, would the fuel consumption
increase further? The 0-60 time is not of huge importance to me as the
jeep is fairly quick for its size anyway!

Regards and thanks for your help again

Andy

Kia

Received 10th January 2007 via hand-written letter, Kia Sorento 2.5

Dear John,

On the 5th December 2006 I had a Tunit V-CR fitted to my Kia Sorento 2.5.

I thought you would be interested to get some feedback on the change in performance before and after its fitting.

The car is more lively with a better take-off from standstill and when overtaking vehicles at high speeds. Towing my caravan requires less throttle and again pulling away from standstill is much improved.

These observations are, of course, subjective but I have also measured the mpg of the Kia solo and towing.

When driving solo on local and longer trips I originally achieved 32-33 mpg. After the conversion I now get 36 mpg! This is excellent.

Even better is the towing improvement. Before the conversion I got 22 mpg and after the Tunit was fitted I now get 26 mpg.

Thanks also for the Millers fuel additive and the allowance for the K&N filter I already had.

This has been one of the best investments I have made. I wish yourself and the staff a happy New Year and all the best for the future.

Your sincerely

DK

Land Rover

From Ian via email - 8th March 2004, Land Rover Freelander TD4

Just a quick line about the Tunit VCR that I bought from you earlier this year. My car (Freelander TD4) has continued to perform brilliantly and in addition the MPG has increased. I always brim my car at refills to keep a check on the mileage (sad isnt it!). Since the Freelander was new I have averaged 37/38 overall. Since I fitted the Unit I have tried to drive more or less the same although sometimes the urge to use the extra power is just too great. There is definitely a noticeable difference in the economy and for the last two tankfulls I have averaged 41 mpg. Enough said. I am tempted to use the next step up on the VCR and may well do once the car has done more mileage. (still only 3500)

From John Buoy, via email 16/6/03, Range Rover 2.5 DSE

Tunit arrived on schedule and I fitted it straight away with a little help on the phone from your representative.

It is fantastic, every bit as good as you said. My notoriosly slow underpowered Range rover 2.5 DSE is now quicker than the V8 petrol Classic that I had before. I now await mpg figures which I can only assume will be lower than pre-tunit?

Thanks again for a wonderful product and service

Jon Buoy (name changed to protect the innocent, or him from his wife :-)

Mazda

This comment from JW Scott about the Tunit V-CR

It is excellent in short. Although fitting took me a while, mainly due to Mazda`s securing of the ECU, apart from that the,manual for installation was very good

On start up I noticed a lack of smoke and a quick blip of the throttle confirmed the same(before slight puff on blip of throttle)

Right from the off you notice the increase in torque, from 1400 rpm it pulls like a train increasing asit does to 4000 rpm, in what ever gear you choose.(mine being 3rd, 4th and 5th) The engine revs superb for a diesel, tjough you don`t need to as the torque from 1400 rpm to 2500 rpm is quite sufficient. I should also point out that once fit the engine is now smoother and quieter than before. The following performance times are approx (argos stopwatch) 0-60 11 secs,30-50 mph in 3rd gear 5secs, 30-50 mph in 4th gear,4secs. Fuel consumption is about the same as before 45 mpg around town and 50 mpg on long motorway runs, all I might add at legal limits, but not pussy footing . Smoke which was apparent on hard acceleration before is hardly noticeable.

Thanks again yours faithfully J W Scott `From Diesel car owner last 20 years and diesel fitter past 48 years`.

Mercedes

Received June 2007 via email, Mercedes CLS 320CDI

Nick

Got the Tunit....if I told you it took less than 3 minutes to fit...piece of cake.

Have it on level 5 and will leave it there as there is no smoke and there is a noticeable improvement in performance (esp mid range...oodles more torque). Where the tunit does differ from the rest is that it is much more refined...I have had previous plug and plays...all these products were either full on or off which is not what I wanted for the Merc, which now is much more responsive.

Regards

David

Received a week later...

Nick

Have had the tunit for one week so the honeymoon period is over...my thoughts? It's like driving a CLS 500 with the fuel economy of a diesel. I have left the module in position 5...the result oodles of torque...snappier acceleration and just all round a better car and would you believe smoother. What Merc are at with the standard ECU I'll never know.

Tunit is streets ahead of previous "plug and plays" I have used.

Cheers

David

Recieved Novermber 2006 via email, Mercedes E220 CDI

Dear Daniel

I thought I should write to you having had a "Tunit" fitted to my Mercedes E-Class 220CDI Estate. I have just completed a 600 mile trip this past week end, and am delighted at the improvement in all-round performance of the car. It is so much smoother, more responsive in the 2500-3000rpm range, and has delivered a significant improvement in mpg. I am what might be described as an "enthusiastic" driver, and although now 70 years of age show no signs of slowing!!!! Of course, one soon becomes accustomed to the way the car now drives, and easily forgets how it used to be. I am quite honestly surprised, and very pleased at the end result and have no hesitation in recommending this modification to anyone driving a similar vehicle. Thank you for your attention before the purchase, and I am glad to report that the service offered by your Peterborough Distributor was exemplary.

Many Thanks

RD

Mitsubishi

Received 23rd April 2008 via email, Mitsubishi L200 2.5 TD

Hi Jerome,

I had my Tunit fitted Wednesday afternoon by Rob Cotterell.....the unit
is simply awsome...very very impressive........but what impressed me
even more was Rob Cotterell himself.....he was such a nice
guy.....explained what he had to do......checked it more than
once......explained how it worked .....wired it in ,so i could take it
out myself if i ever sell the truck ......and then put it all back so
you would never know it was there......totally professional and one of
the most genuine mechanics i,ve ever met.

Many Many Thanks

Lee

Received 23rd August 2007 via email, Mitsubishi L200 DCi Warrior

Hi and good morning Nick,

I would just like to thank and compliment you and Tunit on your service and promt response to all the questions I had ... upon reciveving your product I had it fitted immediatly and was ovewhelmed with the performance increase having allready had the mitubishi power upgrade your product made the vehicle drive better than I could have imagined ... I have and will continue to sing your praises .. and promote the sales of the Tunit product here on the sunny island of Cyprus.

Yours sincerely,

Adrian

Received 3rd July 2006 via email, Mitsubishi Shogun 3.2DiD

Dan

Thanks for all the information. I now have a 3.2 DID complete with your
Tunit, which I ordered through my motor engineer. The difference
in performance, economy and engine flexibility is staggering. An excellent
product!

Tim

MG Rover

Received 24th July 2006 via email, MG ZT

Dear Laura,

Unfortunately I cannot receive Men and Motors, but fortunately I do have
my own Tunit device fitted to my MG ZT! and so together with my American
car Hi-Fi system I can enjoy my own roadshow every day! What can I say,
the V-CR Tunit device works exactly as advertised (how many products can
you always say that about) and more. The engine now operates in the way
the go faster looks and rear spoiler that were original to the car
suggested it should. The pick up and acceleration are nothing short of
phenomenal and the engine is turbine smooth and almost silent whilst
cruising. The fuel consumption remains unaffected and driven with
slightly less gusto is marginally better than before.
Thank you for bringing such a brilliant device to market. A definite
must have for anyone with a turbo diesel who wishes to exploit the
vehicles full potential at such a relatively low cost witheasy
installation.

Best regards,

Colin

Nissan

Received April 2007 via email, Nissan Navara 2.5 D40

Just to say thanks, fitted my chip last week to my Navara D40 and after trying others I am well impressed. Got it set on number 7 running fine so far, small hiccup when set on number 8 but torque is amazing. Will have to see how good fuel econ is when I start driving sensible again but I can't hep putting my foot down at the mo.

Cheers

RR

Received October 2006 via email, Nissan Navara 2.5 DITD

Just a quick note to say how impressed I am with the Tunit I had fitted to my truck.  On your recommendation I had the Tunit fitted at Car Media in Sudbury, Suffolk.  All I can say is that they are a great bunch of guys, they are very knowledgeable and couldn't do enough to help.  As for the effects of the Tunit, I'm most impressed, it has totally transformed the truck from a bit of a slug to a tyre-smokin' beasty!

Since the Tunit has been fitted, I've found I'm getting around a 7% improvement in fuel economy, which equates to an extra 40 miles per tankful.

So thank you for a very good product and service.

SL

From Mr B Melling, Darwen, Lancashire 21/10/01, Nissan Terrano II

In August 2001 I had a Tunit II fitted by yourselves to my Nissan Terrano II. After driving for a couple of months I would like to say I am delighted with the improvement the unit has made. It is much more pleasent to drive with the increase in torque from low revs and throughout the rev range. The extra power is great.

Thank you very much. The lady on reception and your staff were very pleasent and helpful.

Yours Sincerly

B Melling

Opel Vauxhall

Received September 2007 via email, Vauxhall Astra 1.9 CDTi

Hi,

Cheers for doing the car today, it's fantastic now! I'm noticing a much better fuel economy already.

Cheers

N

Peugeot

Submitted to Parker's Website on 25th March 2005, Peugeot 307 HDi 110

"Lacks mid torque power however a tunit unit works wonders, increasing BHP to 140"

Click here to read the review:

http://www.parkers.co.uk/cars/owners-reviews/archive-review.aspx?review=23730

Received October 2006 as a hand written letter, Peugeot 406 HDi

Dear All at Tunit,

Thanks very much for your recent service on my purchase of Tunit for my 406. 
I must say that the help, assistance and service from all of you has been first class and it has been a pleasure to deal with you.

The true test came recently when I towed my caravan and awning to North Devon, where I noticed a vast improvement.

Thanks for all your help again.

Yours faithfully

RWH, Chester

Renault

Recieved 27th Oct 2004 via email, Renault Clio DCi 80

Hi There,

Thought you might like some feedback on the VCR tunit for the Clio:

Having parted with a significant wodge of cash for a VCR unit for my Clio DCi 80, I must admit that I was kind of expecting my buggy to turn into a hot-rod in sheeps clothing. With the unit fitted (5 minutes with a screwdriver and socket set), I choose the first setting to the left of centre for the little adjustment jumper on the unit. The result? 50-70mph acceleration reduced from 5 seconds to just 3 seconds. Forget about any other figures, this is the one that really counts as it decides how long you have to spend on the wrong side of the road when overtaking. In normal driving the power is kept well under control as the unit allows the car to be driven gently just as though it wasnt fitted but if you need to climb a hill in fifth, pull away in second, cruise at 70mph with a car full of concrete, the Tunit unit allows these tasks to be completed with great ease and alot less gear changing.

At 40mph, in fourth, the car is like a missile for passing any grandads on their eternal sunday morning drives, At 70mph in fifth, a gentle push on the gas takes you up to 90mph with ease. The car feels much more solid to drive and on windy roads as there is a lot more torque to pull the car around bends quite safely in fifth.

The downside? Now I have to take my girlfriend out to dinner once a month instead of once a year as the fuel economy has gone up from 55mpg to 62mpg. She doesnt miss a trick! Needless to say, we dont eat locally, further from home the better as I'm always happy to be the chauffeur provided its my car that we take!

Andy B.

From Keith Wilkinson 10/6/03, Renault Clio Dynamic dCi 80 - 12 month report

I started compiling this report to you in June, my Clio, together with it's Tunit, being 12 months old with 20,000 on the clock, but the sun kept shining so working outside took precedence over the computer. Here are some facts and figures on the cars perfomance.

Most of my driving is on country lanes and B roads with some town miles, this type of driving gives regular averages of 36 mph and 67 mpg.

I have made a number of trips to Southern England, doing most of my driving early morning to avoid delays. A typical round trip of 650 miles (90% motorway) giving averages of 69 mph and 61 mpg

Lest you think I pussyfoot around, I had to replace a 4 Continental tyres at 12,500 miles, I guess the road surfaces on North Lancs roads are abrasive...

Renault expect the Clio to return 67 mpg overall, but as I recall the long term test results in Diesel Car show consuption of their Clio to be mid 50's. Are the DC drivers thrashing their Clio, day in day out, or are the Renault figures overly optimistic? Either way I am more than happy with my Clio with the Tunit fitted.

You may recall that my Clio was the first 80 bhp you had worked on and the Tunit was tuned to give maximum performance through the gears, rolling road tested at 103bhp.

Once again thank you for your superb after sales customer service.

Saab

Recieved 26th Aug 2005 via email, Saab 9-3

Hi Adam,
Just to say thanks for looking after me today, I thought the service was excellent, both in terms of the package (how easy it was to book my car in, how quickly the work was completed, the road test/instruction and of course the unit itself) and indeed how pleasant and professional everyone I spoke to was.
Of course the real important thing to me is the product itself, I had obviously expected to see an improvement in performance based on what I had read on your website and indeed the various Saab forums I visit on the internet, however I can honestly say I got a bit of a shock when we went out on the test drive. At certain points in the range it really doesn’t feel like my car, there is a very clear surge of power from 3,000 rpm upwards which feels great! Had a very good run back down to Nuneaton, and really got to see what a difference it has made on the toll road! I am looking forward to learning the limits of my car all over again, I can honestly say that it feels like a new car altogether!
Too early to say what the fuel consumption will be like, but given that I have been driving the car with real ‘spirit’ since the unit was fitted and the estimate on my fuel computer I think it will be at least comparible than it was prior to the Tunit being fitted.
Would not delay in recommending you product or service to anyone, and I now hope to persuade my Dad to get his 530d done!
Thanks for a great service
Tim

SEAT

This comment from Plug, SEAT Alhambra TDI 110

Fitted to a Seat Alhambra TDI 110 at 66000mls with a K&N filter. It now pulls from 1600rpm and will rev to 5000 (power tails off from 4000) Power is up to 141bhp and 221 lb/ft, best mpg 54 taking it easy at about 60mph.Worst mpg 21 flat out at 110-120mph (autobahn). Average 42mpg overall, only after an initial showing off phase which can last quite a few months.

A drawback is front tyre wear and if the road is wet the front tyres will spin easily in first and sometimes second.Now with 81000mls there have been no defects resulting from the tuning unit. Smiles per miles it`s worth it .

yours PLUG

VW

Received 4th October 2007 via email, VW Bora 1.9TDI 115

Hi Dan,

I’m really pleased with the Boras performance since you worked your magic.

283 lb/ft of peak torque and minimum 234 lb/ft (the standard spec peak) available between 1700 and 3200 RPM has transformed the drive.

The motorway overtake manoeuvre is now: let the car pass by, accelerate (in 6th) and pull out - oh and then brake to avoid running into back of the car that has just overtaken me :)

Well pleased.

We have a trip to Lindisfarne next week in Northumberland and en route there are a few longish A road climbs where it should excel.

I’ll keep you posted about my MPG.

Best regards

Nick

 

Follow up email, received 23rd October 2007:

Hi Dan,

I thought I would give you an update.

The Bora performed extremely well enroute to Holy Island up in Northumberland. It was always good on hills, but now they cease to exist!. I think the fuel consumption remains as good as it was before the Tunit was fitted, 61 MPG on the trip covering the 200 miles in 210 minutes with a full load and a tide to catch avoid gives little cause for complaint!

My perception is that 4th gear now accelerates the way 3rd used to do and 6th in turn accelerates like 5th did. But of course has a much wider range which is redoubled because the torque hangs in much longer.

Imagine if it had a seven speed box.

I would also like to thank you again for the excellent & conscientious service you provided.

Best regards
Nick.

 

Recieved 6th April 2006 via email, VW Golf V 2.0TDI

Hi John

Received chip for Martins car and installed it in 5 minutes. Was extremely impressed with the improved power and torque.
Martins son and myself both picked up new 2.0 tdi Golfs today so I imagine you will be getting an order for another 2 in the not to distant future.
Thanks again very impressed with the chip and service you have provided.

Cheers Daniel
Australia

From Hazel, via email 27/5/03, VW Passat

Well, words can't describe it. I think that I said to you that I never expected to change my other Passat and this one was in fact a most unexpected present (some present!!) and I bought the tunit, which makes the car absolutely stunning. It is such a wonderful combination of power, torque and flexibilty; I find it breathtaking - as do all passengers to date. I can hardly wait to see how it performs with the caravan when I set out tomorrow. I will send you a postcard from Provence to let you know what the verdict is, but I know that it will be superb. I have always loved cars, but have never driven anything like this. I just can't thank you enough

Miscellaneous

From Mark Illingworth from CPI Moto, via email - June 30th 2004

Morning Adam

Just a quick note to say that I fitted the tunit over the weekend and the results are excellent.

The smooth quality original characteristics have not altered at all, however the acceleration is much stronger and longer

I have not been on the motorway yet so not sure what the MPG will be like

Thanks for all your help

Mark


From Justin Kenlon, via email

I'm picking up my Vento this week. I had already planned on doing the
CAI setup, a front-mount (probably from a volvo), the 11mm pump, and the
t-4 multivan .260 injectors. It seems that your comprehensive project-X lies
along the same lines. Are there any distributors for your products or
services in the US? I'm really appreciative of all the hard work that's
gone into your thoughtful and informative web-page.

This comment appeared as an answer to a query on the carsurvey.org web forum

"20th Jan 2002, 16:47 I have a 2000 Vectra LS DI saloon, with 24,000 miles on it. The engine in my car is very similar to the DTI engine. My engine, even at 24,000 miles still drinks about half a litre per 1K miles... similar consumption to yours. Some people who own cars with the same engine claim that oil consumption virtually diminished to nothing about about 15K miles... I am still waiting, but overall it is a good engine!

Do you know how they fixed the rattle from the seatbelt area? My car also has a similar rattle from that area! (I figure many trim bits will be of a similar design on my car?).

I had my engine fitted with a 'Bromleys' tuning unit, goes like a rocket now, with slightly better economy to boot. See www.bromleystuning.com

One other point, the turbo boost supply pipe popped off the inlet manifold the other day, a common fault I am told. Make sure the jubilee clip which secures the rubber pipe is secured properly to the manifold at the front of the engine.

Regards, Richard
rickp@rickp.freeserve.co.uk"

 

From Keith Godbolt, via email

Dan,
Just wanted to update you with progress.
No problems fitting the unit now - quite clear where the little tinker is supposed to reside. Plug fitted in-circuit in about 10 mins then a bit of head scratching on where to position the unit itself. In the end I went for what looks like a redundant plastic bracket at the front of the air filter assembly on nearside (I'm thinking plastic might reduce vibration somewhat) and the cable routes alongside other cables on top of the rad. This also makes it easy to uninstall for service time (I'm a bit paranoid about Volvo dealer whingeing about warranty etc. so I'll take the short time to remove and refit as it's so straightforward). Couldn't resist tweaking the dial from 5 to 6 but won't go beyond that - no need in retrospect.

Results: Amazing! Very, very impressed that such a straightforward addition can provide substantive and noticeable all round improvements - without any apparent compromises (are there any?) - specifically:

- Engine is much smoother, particularly at idle up to about 1600 rpm which is normal 'about town' traffic; is also smoother at motorway speeds
- Noticeable improvement in power/torque at mid- high-range rpm and certainly faster pick up from low revs - there was a considerable 'lag' before that has reduced considerably. It's a different drive.
- After just one weekend and about 250 miles of mixed motoring the mpg meter is returning an improvement of +2mpg to normal (now just over 48mpg) - I've not got over this before and I'm certain with some longer runs this is going to be much improved - I'll let you know in a month's time how it's going.

End result - very happy for now. What I don't understand is how or why Volvo with all their R&D capability can't deliver this on the car itself? Or is this just 2 years of technology development?

Thanks a lot again for your very prompt assistance.
Keith

0845 838 1405 :: info@tunit.com