[roland2003]

Hi Guys, our GTT devolopment car has now passed the 20,000 mile mark. Mods include GTT260 conversion+ GTT tensioner pulley & tensioner stop. GTT 2piece alloy crank pulley ,GTT oil catch can, silicon water hoses, 40,000v coil, live wire ignition leads,intercooler spray and more. NB.. car runs stock software with raised idle only.
Transmission includes Quaiffe LSD, comp clutch,& fidenza flywheel.
Brakes are GTT/Porsche 911 turbo on the front and GTT Spiroslot at the rear.
Suspension is Bilstein PSS9.
The setup has proved extremley reliable,we have monitored various things over the last two and a half years,minor improvements being made where we felt we could. Here is a list (no particular order) of things that have failed over this period:-

'T' Map sensor.........BMW part (cheap and easy to fix)
Intercooler Bellows.........BMW part (split,cheap & easy to fix)
Exhaust hanger.............BMW part
Sticking rear caliper..........BMW part
Flywheel.......................Fidenza part,dropped a dowell & put 2 big holes in the side of the gearbox (lots of work and money to fix.!)

Drivebelt now changed twice as a matter of course,car runs min 98 octane always,attends track days regularly, but never competes in land speed record attempts
Best Regards Roland GTT

[Rickys'S]

Quote: Originally Posted by roland2003

Hi Guys, our GTT devolopment car has now passed the 20,000 mile mark. Mods include GTT260 conversion+ GTT tensioner pulley & tensioner stop. GTT 2piece alloy crank pulley ,GTT oil catch can, silicon water hoses, 40,000v coil, live wire ignition leads,intercooler spray and more. NB.. car runs stock software with raised idle only.
Transmission includes Quaiffe LSD, comp clutch,& fidenza flywheel.
Brakes are GTT/Porsche 911 turbo on the front and GTT Spiroslot at the rear.
Suspension is Bilstein PSS9.
The setup has proved extremley reliable,we have monitored various things over the last two and a half years,minor improvements being made where we felt we could. Here is a list (no particular order) of things that have failed over this period:-

'T' Map sensor.........BMW part (cheap and easy to fix)
Intercooler Bellows.........BMW part (split,cheap & easy to fix)
Exhaust hanger.............BMW part
Sticking rear caliper..........BMW part
Flywheel.......................Fidenza part,dropped a dowell & put 2 big holes in the side of the gearbox (lots of work and money to fix.!)

Drivebelt now changed twice as a matter of course,car runs min 98 octane always,attends track days regularly, but never competes in land speed record attempts
Best Regards Roland GTT

Very nice Roland

Its funny , I have gone round in a complete circle with the maps aswell, I now run stock map set at 7600rpm and +150rpm at Idle....my Unichip is very much unset just a little + on the fuel but not a lot.......hopefully it will cope with a twincharger kit aswell

[NickG]

As a reference my 3 1/2 year old car which is stock, has suffered from both these faults

Exhaust hanger.............BMW part
Sticking rear caliper..........BMW part

Booked in at GTT at the end of the month!

[T-bone S]

Q - how is it possible to be running those mods with stock map? - does it really perform? - do you really make 260BHP with just hardware?

I'm not doubting - just looking for an explanation. Am currently looking at GTT220 upgrade for my MCS but only once I've got enough money to sort out stoppers at around the same time. Whats point is there in having all the power but then can't stop.

[JDinho]

Quote: Originally Posted by T-bone S

Q - how is it possible to be running those mods with stock map? - does it really perform? - do you really make 260BHP with just hardware?

I'm not doubting - just looking for an explanation. Am currently looking at GTT220 upgrade for my MCS but only once I've got enough money to sort out stoppers at around the same time. Whats point is there in having all the power but then can't stop.

My summary: Its all about pulley reductions and better breathing. The rest is all beyond me!

[Rickys'S]

Quote: Originally Posted by T-bone S

Q - how is it possible to be running those mods with stock map? - does it really perform? - do you really make 260BHP with just hardware?

I'm not doubting - just looking for an explanation. Am currently looking at GTT220 upgrade for my MCS but only once I've got enough money to sort out stoppers at around the same time. Whats point is there in having all the power but then can't stop.

Well all I was really worried about was A/F/R and ign timing!

When the car was on the dyno being set we saw that 380cc injectors running on stock map was delivering nearly enough fuel ....this kind of made sense because my map was set using stock 340cc injectors so if the ecu is telling the 380cc to cycle 40% then they would be delivering more fuel than the 340cc!

Also the ign timing on stock map was spot on with my mods, if a touch advanced too much....imagine a small pulley and a completely different cyl head and cam pushing in more fuel and air causing a higher explosion and more heat.....defo did'nt need more advance!

I use a Unichip to change those too things it works very well and can be set on the dyno, live mapping is important imo or a wideband afr sensor at the minimum should be used!

Im talking about my car BTW and never had a 210/220 kit, i guess with a 17% pulley on stock map & stock inj it may be a little lean so a different map could be needed or it could be spot on as our mcs are rich anyway!

Roland is a bit off a doctor and will get it right for you anyway.....

[T-bone S]

- cheers guys - that was a fair explanation - my primary concern were regarding the A/F ratio and timings and their affect on drivabilty. Also I hadn't considered how the map would send the same signals to the uprated/larger capacity parts - which in reality still gives bigger performance.

Yep - I too think that without uprated software and 220 type kit could run lean on a stock mapped car at the top end of the rev range - but too rich low down

[roland2003]

Our GTT260 includes larger injectors. Our initial expectations were that it would run rich but was not the case. The ecu is alot more clever than most people give it credit for. Not only will it increase injector duration automatically when boost is increased (small pulley), but it will adjust for cooler inlet charge (read big intercooler) ,and will back off the duration with big injectors. Our car rolling roaded at 270 and 273 bhp on two seperate dates. Both times we ran stock map,second time had the bigger injectors.
Best Regars Roland GTT

[T-bone S]

I know modern day ecu can adapt a fair bit - but didn't realise that the mini's was this advanced too. Very very interesting

The engine got a fair bit of stick in the press because if it's mongrel parentage - and was seen as a quick and crude solution - but in reality it is very good and tough.

[dipstic&dinnerlady]

Had my car on the dyno today
GTT 210 plus cold ram filter,exhaust reroute pipe,GRS intercooler(virtually 230 kit)
209bhp @ 6266rpm (Millway) Guy doing it said he could get another 10-15 bhp with a live remap as it was suggish on pickup (£600 )
Still if thats correct 10-15bhp for £600 doesnt sound bad

[T-bone S]

I take it you added the larger IC after the GTT work? -

[dipstic&dinnerlady]

Quote: Originally Posted by T-bone S

I take it you added the larger IC after the GTT work? -

Yes couldnt decide what route to take,have looked at cost of BVH/cam but thought I would try intercooler first if I could get a realistic 225/230 that would do me (had quotes of £2000 + for head and cam fitted)
Will give Roland a ring in the morning to see what he thinks is my best route.

[Lucky Dave]

My 2005 MCS 210GTT + works airbox and blueflame exhaust has clocked just over 18K and the GTT work was carried out when the car had covered about 500 miles!

Now bigger injectors fitted and looking the re install the standard map for BMW reasons......anyone with a cable I can borrow in the midlands?

The car runs so well and has been on a couple of rolling roads, first time it gave a optimistic 250! with some strange numbers, but with a lot of cold air forced in, the second time on a reliable set of rollers it gave a steady 220 without any air fed to the intercooer at all, only the rads were cooled.

Good work GTT, im sure I will go for the stage 2 head and throttle body next

[GTT 280]

Nice to see the GTT260+ is durable. It sells itself - great.

You are very controlled not doing more than 20,000 in 2.5 years with that power - laugh laugh.

I am very intrested in the OEM clutch. Will this cope with 20k+ miles or is it worth upgrading to black diamond or something. Would the fitting of a 260bhp mod be the ideal time to replace a clutch - i mean it must be more appropriate than taking the car apart after the mods just to fit a clutch - reduction in labour right?

So some details on the clutch would be great... thnks.

I can't wait for my 260 upgrade later this year

[GTT 280]

quick question - what wheels is the 260bhp+ car running on - 16's, 17's or 18's ?

I'm currently on 18x7.5 Dare X-4's and am wondering if these will be suitable for 260bhp+

[roland2003]

Hi, yes we run 17" wheels. Before the flywheel let go we were running stock clutch. It was supprisingly good,though I dont tend to dump the clutch for 'traffic light grandprix's'
Best Regards Roland GTT

[uncle albert]

In desperate need of GTT grunt...

James

[s_and_m]

Sorry guys, I'm now confused (seems to be a natural state for me!)

I have a GTT 220 kit and have run it without problem for 8000 miles and a fair few track days. If I remember correctly, Roland re-mapped the car as part of the conversion and counciled that I run on Optimax/Ultimate or Tesco 99 from then on as the map the timing was advanced as it could safely be. Needless to say the car is never filled with 95 RON stuff.

From reading this post, would I now be better going back to the stock map? I'm sure I read a post somewhere where a BMW service a GTT converted car got put back to a stock map without the owners permission. The owner then had it remapped to regain his 'lost' power? Is this because the GTT210/220 uses standard injectors and therefore needs a more optimised map?

So, what is the best option for all us folks who have the re-map as part of our GTT conversion? Should we revert to the stock map or stay with our tuned file? Are current GTT 210/220 kits being installed with the stock map?

Ricky seems to suggest the best bet is to put the car on a dyno and set it up that way - is this something that GTT would condone/facilate?

Cheers

S

[NickG]

S

When I had my GTT220 fitted at the end of July, Roland advised that I didn't need the remap as my car was running well on the stock map, and I would be getting 99% of the performance and saving the cost of the remap.

The offer to have the remap applied then, or at any point in the next 12 months for £100 was there.

I took Rolands advice and stuck with the stock map. I am tempted by one of the remaps that reduces traction control intervention, but I have found that the extra torque and power from the pully have improved the driveability of the car.

[roland2003]

Hi Steve, with the GTT220 now rather than 'automatically re-map the car ',we test it after conversion on the stock map first. If we find the fuelling and ignition timing spot on, we can leave the stock map in and reduce the price of the conversion accordingly . It just offers more options and saves the customer money if nothing can be gained from re-mapping. Some vehicles do require re-mapping (in particular retarding the ignition ) and in these cases are always re-mapped. The prices on the site include the remap, so in reality many people pay less!
BTW Yours was re-mapped
Best Regards Roland GT Tuning