I have an 86 Iroc 406 tpi, with mass air, 24lb injectors (alittle small I know), about a 270 roller cam, with trick flow G2 heads.
I cranked her up on the 89 ARAP bin.

I can tell she's starving 2500 rpms and up,
what would be a good place to start on the chip to correct this?
I have an idle problem, Under that bin should it still idle fine or would I need to change something else to help it idle for the extra cubic inches?
Would the vette spark table be a good place to look for the spark advance since they have aluminum heads?

Anybody else burned a chip for 406tpi with massair? Kinda looking for things that need to be changed to please the larger engine.

 

What is your O2 sensor telling you? Also, have you changed your fuel injector flow rate to match your injectors+fuel pressure?

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Mike Metzler (Desert86Roc)[*] Webmaster: SpeedWorldMotorplex.com[*] Click Here For 86 IROC 305 TPI (406 build in progress) Page

ET's @ 1250 ft[*] 14.28 @ 95.461 mph (uncorrected, NOS, no headers)[*] 15.365 @ 86.785 mph (uncorrected, headers, no NOS)