what would really be useful is some info on making the best of stock head, intake mani, and cams - for the guys that race and care about classing alot of places won't let you touch those items without getting put up against some stupid competition
I'll be probably forging down that road on my own around the winter of '09 or so
This build will be to fit SCCA's Improved Touring A division:
looking at doing the following
- custom header with some ideas garnered from Mustang drag racing guys that run stock heads to help out with scavenging exhaust out of these craptacular stock exhaust ports
- exhaust (short & light, maybe a muffler)
- intake (again, probably more weight reduction than power, but every bit helps)
- either Megasquirt stuffed into factory ECU housing or some sort of piggyback, not sure... (need to read rules again, but mainly for fuel curve adjustment)
- need to look again but I'm pretty sure I can mix & match stock parts (so 93 cams on 91 head, or just the 93 cams & head.. whatever is better)
there are also some small internal stuff I'm allowed (extra 0.5 compression ratio being the biggest help) but I'd be curious what the experts here would expect that to make with those 5 items attached to a stock 91 MR2 5SFE, or if I'll need to delve into doing all of that plus the $$$$$ minor internal stuff to squeeze every last drop out....
some of the cars I'll be competing with are putting down upwards of 145-155whp & similar torque... though they're heavier, FWD, shaped like a brick, etc so as long as I can get some decent power (maybe high 130s-low 140s and similar torque) out of the 5SFE I see no issues being on a level playing field with them
would you expect your recommended header sizes in the "mild build" section to mesh well with someone stuck with stock cams? I also noticed no mention of intake - just because it shows no gains, hurts power, or just isn't enough for the budget oriented guy to worry about?
I'd be neat to see a "stuck with stock cams"/"external bolt-ons only" section
