You can change the style the forum displays by selecting your preferred style at the bottom left of the site.
We have made an enhancement so that old threads should now link from search results to the correct thread. This is not yet in place for single post links
750bhp RS6 engine with twin GT28's, carbon fibre everywhere including the gearbox bellhousing, very trick. Still has some S2 parts in there too, rear diff used on the front and S2 hubs used all round.
sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racer
Awesome video - the guy makes what is a difficult job look really easy...2 hours labour to do the job - brilliant. I suppose with another hour to strip out the box from the car garages shouldn't be charging the earth for a service, etc!
4 Rings Rule.......Everytime
1984 80 Quattro B2 - Project Car
1996 S2 - ABY 6 Speed - Pride and joy
2003 A2 TDI - Economy
Hey Andy, just read about your tuning woes, I have to say it sounds all too familiar when using JE's. I've heard lots of people complain there CR are really high even though low comp pistons were purchased, myself included. Its a bit out of order really, it leaves no other option other than to compromise on the final build up using comp dropping gaskets even though the motor was specced and blueprinted correctly. annoying hey.
2000 B5 A4 Quattro Sport ~ 2.0 20V GT30R ~ Gone
1993 S2 ABY Coupe ~ Gone
1989 2.2E Coupe ~ Gone
Awesome video - the guy makes what is a difficult job look really easy...2 hours labour to do the job - brilliant. I suppose with another hour to strip out the box from the car garages shouldn't be charging the earth for a service, etc!
The cost escalates massively once you start replacing bearings, they are almost all unique to the 01E and all of them together is like ÂŁ1100 + VAT as you can only get them from Audi or Porsche
3.Last but not least, the turbo is f**ked! Basically the seals are leaking quite badly when the pressure is wound up, resulting in boost leaking into the oil return line and into the sump
So the turbo is being taken off on Monday to be shipped off for a re-build.
How did you spot the turbo was leasking badly?
Just thinking your turbo is a 3071r? the CHRA can't be rebuilt new centre section time
Just thinking your turbo is a 3071r? the CHRA can't be rebuilt new centre section time
Pressure tested the boost sytem and it would not hold pressure, but had not signs of an external leak. So the system was filled with smoke, which we then saw coming back out the PCV hose, this caused much scratching of heads as the PCV system was blanked off. Eventually we took of the oil return hose from the turbo to find the smoke coming out there and into the sump
Already had a price for re-building the turbo with a new CHRA, not as bad as I thought, so it's coming off this afternoon.
I think I can see a dim flicker of light at the end of the tunnel
sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racer
Man, you have such bad luck with this car...
9.5 CR will mean less timing up top, meaning less power.
How much boost and timing you can run before you get knock limited will be seen on the dyno, when you stop making power.
I am sorry if I have not followed everything, but couldn't you use a thicker headgasket to drop the ratio a bit?
You'd really benefit from a bit lower compression ratio than stock.
I could, but I'm going to get it mapped as it is for now, I really don't want to strip the engine AGAIN! I'll see how it goes and look at dropping the CR next year if necessary.
sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racer
9.5:1 compression means as prj said, but it does not mean necessaraly that it will make less power. Boost isnt everything, and according to my mechanics back home, this engine likes high compression! My comp ratio will also be higher than 9:1 probably after the head rebuilt.
Uhm, it usually does mean that you'll make less power - whether it will be significant remains to be seen.
Then again, you'll have better fuel economy and a more responsive low-end.
EDIT:
I mean - it usually is on /these/ engines, as they are heavily knock limited and already fairly high compression.
on 1.8T and 2.0T newer audi engines, the max timing advance they can go is no more than 16-18deg on the higher revs with most of the time using meth/water to be safer. Our engines can go more than that, and this info was given to me recently by a greek tuner back home. Obviously the newer engines are already on higher compression, but every highend 1.8 and 2.0T engine i have read about recently in greece runs about 2.3bar of pressure and not all have lowered compression!!! which sounds amazing, but im wondering how much timing they are actually running to be safe!
It all depends on the turbo as well. A 3071 with .63ar that wont need high boost on the top end anyway as it will be dead already, will benefit having higher compression as most of the power will be delivered earlier on!
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Comment