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Old 06-28-2010, 04:18 PM
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1972 pontiac engine suggestions?

Ive been steadly modifing my 72 firebird. from the auto turbo 350 trans to a 4-speed muncie.
since its the weak 180hp 350 with the 2 bbl rochester and 7.6 compression ratio, ive found a few parts.
-an edelbrock preformer manafold
-600 holley even bore carb
-and a set of heads off of a 400. the head is 87cc
-and a set of long tube headers.

How much should i gain torque and hp wise with these? i was thinking 50 from the 4bbl and another 70 from the compression ratio increase.

any thoughts?

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Old 06-28-2010, 05:12 PM
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Quote:
Originally Posted by AndersonRacing44
Ive been steadly modifing my 72 firebird. from the auto turbo 350 trans to a 4-speed muncie.
since its the weak 180hp 350 with the 2 bbl rochester and 7.6 compression ratio, ive found a few parts.
-an edelbrock preformer manafold
-600 holley even bore carb
-and a set of heads off of a 400. the head is 87cc
-and a set of long tube headers.

How much should i gain torque and hp wise with these? i was thinking 50 from the 4bbl and another 70 from the compression ratio increase.

any thoughts?
The '74 350, with a 4bbl, #46 heads (86cc, 7.6:1 comp), and an 066 cam made 200 net hp. The 066 cam has 273/282 duration and .406 lift, compared to your 555 cam with 269/277 duration and .374/.406 lift. You cant just add X amount of hp for this, and Y amount for that. Everything has to match everything else.

Last edited by WDCreech; 06-28-2010 at 06:06 PM.
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