At the moment, the car idles @ 550 RPM in drive. I can't remember if the number is listed on the hood. What should it be?

That sounds good to me, I think mine idles at 600 in D.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3:73 Richmond Gears and 3" Hooker Aero Chamber
Corvette Servo & .500 boost valve
15.61@ 95.2mph G-Teched, 1-2 shift slippage
"There is nothing more addicting than speed"

For some reason 750 keeps hanging in my head. Can anyone confirm or deny this?

My 91 idles around 500 to 550.

500 it is then!

I think it's supposed to be around 700-750... When setting idle, with the IAC disconnected, it should idle at 450 in drive.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

I just posted the same question. I guess next time I will read a little further down the board. Sorry guys!

Mike

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(Gran Turismo Americano) "The Ultimate Firebird"
Smokin 1989 GTA- Bone stock except for exhaust. (no catalytic-stainless pipe into Flowmaster 2 chamber).