hal9000

My 89 GTU has a bad motor and I was wondering if it would be possible to get the power I need out of a reliable dally driven NA 13b to make it as quick as my friends S2k. I've got a spare S5 motor that i'm starting to disassemble right now and i'm wondering what it would take. I know getting 240hp out of one of these things NA is not trivial, and probably not possible without crazy expensive parts. It's my dally driver so I would not like to kill the low end either. I also have a GTUs 4.3 diff at my disposal. even with a good J port can you get close?



I guess the FC has a small edge on the S2k in weight, but not by much...

Seppuku

carb manifold with, street port, and headers will get you at 200hp(little less or more)

hal9000

i have no problem modifing the fuel injection system. Is the stock manifold a major restriction?



thanks

Seppuku

yes stock intake manifolds are a major restriction. Kahren has made 200hp with a custom manifold, haltech, fd coils, and stock port motor.

SoniX

is that crank HP, or wheel HP?

SPD Racing FC

i can run with a stock one at our 1/8 the mile track ( in my n/a) but they are'nt the best for drag racing

mazdaspeed7

I was dead even with my friends S2000 through 3rd gear. Big streetport S5 engine, megasquirt EMS, full exhaust, ported intake manifolds, intake, pulleys, and an 8 lb flywheel. Shifts at 9500 rpm.

hal9000

Is there any (major) problems with longevity when running that high of an rpm on stock parts?

mazdaspeed7

You dont run those rpm's on stock parts. I did a lot of work to that motor when I built it to make it reliable at those rpm's.



Save your money, get a TII. Its cheaper to go fast with a TII than with a n/a.

Dramon_Killer

Install a v-afc to control your vtec and you should abel to run low 13's.

v-afc's are only 300 bucks.