Just chime in here to say "Cool car!"
1998 BMW M3 3.2 Cabrio • Alpinweiß III on Schwarz • German spec • 1 of 12
SMG • SRA • PDC • AUC • OBC • GSM • HK • UURS • IHKA • FGR • MFL
IG: https://www.instagram.com/iflok/
Any updates?
04M3 TiAg 69k slick-top 3 pedal
99M3 Cosmos 61k S50B32 euro 6Spd
88M3 AW 43k miles Project FS
WTB: 3.5" Eurosport/Conforti CAI
Nice to see an engine upgrade thread. Im a little late to the party also. When I was playing with my S50B32 in NA form, I basically had a standard engine with Schrick 284 cams and standard plenum, with optimised mapping, cold air and aftermarket exhaust (standard headers) it made 285rwhp on dyno dynamics dyno, so 326 is not so bad outcome, especially on pump fuel. With that extra comp you may be timing limited so perhaps running flex fuel (e85) you could feed in more timing to realise more power across the range without going silly high with the rpm. As discussed, standard headers may be causing a small restriction. Spinning up the RPM may also realise more power but with the long stroke design may be putting lots of load on the engine especially north of 8k rpm.
BMW’s
90 E34 M5
84 E24 M635csi standalone ecu with coil on plug
94 E34 540i/6 SC 5-17psi Flex fuel/standalone ecu
97 Z3 2.8
97 E36 M3 euro SC still u/c
OTHERS
11 Audi S5 APR stg2
19 Volkswagen Amarok V6
04M3 TiAg 69k slick-top 3 pedal
99M3 Cosmos 61k S50B32 euro 6Spd
88M3 AW 43k miles Project FS
WTB: 3.5" Eurosport/Conforti CAI
it was hard to quantify as when I done the cams I done the LW flywheel at same time. Lost a little bit of bottom end but the top end was very good. I also used the racelogic and got a 0-100kmh time of 5.0sec without 1 foot rollout, and with the 3.62 diff didnt quite have the legs so needed a gearchange at about 96kmh which added no doubt around 0.3sec to the time.
I found I could still use 6th to about 55kmh, whereas before i could drop the revs stupid low around 35kmh and 800rpm it would still haul 6th
BMW’s
90 E34 M5
84 E24 M635csi standalone ecu with coil on plug
94 E34 540i/6 SC 5-17psi Flex fuel/standalone ecu
97 Z3 2.8
97 E36 M3 euro SC still u/c
OTHERS
11 Audi S5 APR stg2
19 Volkswagen Amarok V6
Have you tried the factory plenum. I've been told by many during my build that BMW put a lot of research and dollars into designing their plenum and that I'd likely loose HP if I modified or changed it. Sorry for the late reply but I've been off the board for too long. Kindest regards,
- - - Updated - - -
Awesome build!
Bookmarks