Could people who have swapped heads, manifolds, or cams and left other parts stock post their et's and the change it got them. I'd like to get an idea of the limit of the stock parts.

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1989 Pontiac Firebird Formula LO3 Auto
-180 degree stat
-Hooker Cat-Back
-velcro t-top bag
-Wonder Bar from my IROC
-IAT MOD, 3.3ohm resistor
-Open element 14x3

*****Possible future mods*****
4th gen seats, fiberglass spoiler, rear disc, 3.42, torsen(posi)

1985 IROC-Z, TPI Auto
-Accel Super Coil
engine and tranny overhauls coming this summer


http://www.geocities.com/krt80/

 

before i went into the engine at all i had a 3.54 posi rear, edelbrock headers, cat eliminator, borla cat back, a 160 stat, hypertech chip, power pulleys. i went a best of 15.09 on street tires. i could only get high 2.0 60ft's then too.
with 3.73 gears, timing adjusted, and the ALDL lock up i think it would have been into the 14.8's with the same traction, maybe a 14.7 with better traction.

lata
tim

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91 Camaro RS-LO3,Auto.
14.209@95.46mph
Best 60' 1.917
Check Out The East Coast F-Body Nationals Home Page
www.geocities.com/njspeeder

My MAFB.ORG Home Page
www.mycar.net/mafb/registry/detail.cfm?id=299

DSI Racing Home Page
www.geocities.com/foff667

 

I got low 15's with my 3.73's, LCAs, open element, chip, pulleys, headers, and cat-back. It was about 15.2-15.3 all day (G-Tech). After tearing into the engine I've managed a best of 15.6 .

[EDIT]Forgot about the exhaust...

-Mark W.
'88 SC Camaro w/ 305 TBI

[This message has been edited by Mark305TBI (edited July 11, 2001).]

 

Has anybody done intake, headers, cam, but kept the heads?