Beer baron, will you be able to provide dyno graphs of all 3 (with rpm on the x-axis)? Also, any logs of boost from on the street or track would be fantastic.
Do you have any info on the new exhaust manifolds? internal or external gate? what about on the 8374 and 9180 setups? twinscroll or no?
what is the exhaust setup from turbo back on all 5 setups?
i suggest looking at the popular turbo 4 cylinder cars for answers, such as the evo and any sr20-based car. also, there is some discussion on bimmerforums regarding inline 6s and twinscroll usage.
there was a great video documenting an rb26 build and it showed/explained porting. it was on another forum from a while ago and unfortunately i can't find it. does anybody else remember it?
6765 on a 3L us-spec S50 BMW
http://forums.bimmer...34&d=1306267312
http://forums.bimmerforums.com/forum/showthread.php?t=1658765
or
http://store.forcedp...y_Code=Turbo-FP
+1
in the turbo bmw world where bore spacing is much closer than the rb and flatness causes issues with MLS gaskets, stock gaskets with copper ring sare popular as they have troubles with blowing gaskets between cylinders