-
-
mine wasnt and i only got a bit of surge witrh motronic when trying to bring boost way too early. We ended up being too safe on motronic and with vems i get no surge eitherComment
-
your right on that. Maybe it would surge when full boost (2.0 bar) was made instead of the 1.7. However Vas never had these problems IIRCOriginally posted by Jamo
I thought GT2871R gave surge in some setups.......Comment
-
only with VEMS use though. As i never had the car remapped by anyone else in motronic. A few goes by Paul brought surging back so we didnt go for itComment
-
-
Questions here about performance and reliability:
ADU oilpump 500 Euros + Adu Water pump 160 Euros = 660 Euros
3B Oilpump 200 Euros + 3B Waterpump 60 Euros = 260 Euros
1. Are the any reliability concerns in the way the belt is tensioned in the 3b Setup?
2. Another question: Should i use a block Girdle? would i have any problems with it?
I found one cheap and i think that if then now is the the time for it!
3. Do i need only the ouside adj. cam sprocet or one internal for the inlet cam?Last edited by Billman; 26 February 2010, 08:26.Go Holset or Go RS4Comment
-
Pls some comments....i must order the parts!!!Go Holset or Go RS4Comment
-
Well I'll be running the 3B set up on mine, it shouldn't be any different to a std 3B and there are no reliability issues with them.
If your buying a new oil pump it would be worth stripping it and checking it for machining swarf. There was a thread a while back about pumps now being made in Korea and they still have dirt/swarf in them. I got mine from 034 and it's made in Germany
sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racerComment
-
Ok, what about the girdle and the adjustable cam wheels?Go Holset or Go RS4Comment
-
I'm not using a girdle as I'm not planning on using big revs. I have an adjustable cambelt sprocket but no adjustment on the cam chain sprockets. I think Jamo has these and Repo has set them up for him. They are OK as long as you know what changes to make.sigpic
1991 Audi S2 3B - 2.5 Stroker engine
1997 A6 2.5TDi quattro avant - C4
1976 RD250E / 350LC cafe racerComment
-
The girdle makes sense if you are going above 7500 RPM?
What cams ar you using?Go Holset or Go RS4Comment
-
dude, read pls!!!!! I am asking: the girdle makes sense if you're going above 7500 RPM or it makes sense in general because you are strengthening the block?Last edited by Billman; 27 February 2010, 15:57.Go Holset or Go RS4Comment
-
800NM are ok??? :-p
Made some calcs:
7500rpm 7000rpm
Stock 86.4 / 144mm
Max Piston Speed 35.45 33.1
Stroker 95.5 / 158mm rod
Max Piston Speed 39.2 36.7
New TTRS Engine with 92,8stroke has a rev limit of 6800 and at this rpm a Max piston speed of 34,6.Last edited by Billman; 27 February 2010, 16:51.Go Holset or Go RS4Comment
-
1: No. Std 3B so same reliability. Only problem is that you may get a water leak if you have to readjust the belt. Use some grease on the block surface and you should be fine. Haven't had any trouble with mine.
2: I use one, but know of many high HP engines running without. Compare a 2.2 and a 2.5 block and you'll see that the 2.5 is beefier at the bottom end. It's up to you to decide I'm afraid
Problems:
- You'll need accurate spacers between main caps and girdle.
- ARP bottom end: one bolt has to be shorter to avoid the oil check valve and you have to use 2 bokts for the rear main cap. Studs hit oil pan.
- Front subframe has to be "cut & shut" to make room for the lower pan.
3. Need on internal to adjust inlet from exhaust cam.Comment
Comment