200whp with stock N/A rotating assay? by ForcedFirebird

2 minute(s) of a 31 minute read

Customer brought the car back to do a 2.8 stroker, almost a year to the day later.

The fresh 2.8 REALLY woke this thing up, gains everywhere. Went to the dyno today and top power was 211whp/198wtq with more left in it, but the injectors are at 126.6% duty using 19lb - 100% duty at 5500 as you can see in the AFR graph. For some reason I never even thought about the injectors (partly because I didn't think it would make this much). Goes to show you how much better sequential fire is, as I have been to 223whp with 17lb in an e36 with some room.

Brought the FauxPro and mount this time, so got video. Will post a link once it's edited.

Here's the graph so far...



Time for some bigger injectors and a another trip to the rollers.

Not sure why it looks like that on the screen shot, doesn't in the dyno software. Replaced it with one that's more clear.

Better screen shot that includes the pull before we started any work.

The graph below is a comparison of a modified s52 vs this m20. Now I really can't wait to go back! We only did a few pulls, so the m20 graph will be much smoother.

s52:
VAC stage 2 head
Sunbelt cams
generic long headers
m50 manifold
10.5:1 forged pistons
TRM tune