on to the heads

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on to the heads

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Chevrolet Forum >> Brand Review >> Engine & Internal >> on to the heads

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on to the heads - 8/24/2008 12:32:36 PM

lablue96

Posts: 8
Joined: 8/20/2008
Status: offline

thanks for your opinions on my block question, while i''''m looking for another block i''''ll start on the heads.
i have head cast # 46264, from what i''''ve found on the internet, it came on the 350 or 400 blocks with 76 cc chamber, 1.72,1.94 up to 2.02 intake valves and 1.5 or 1.6 exaust valves I have 1.94/1.5 on my heads.
my plans were just do some port and polish work by me before i take them in to a machine shop.
question is would it help me at all to go one step up to the 2.02/1.6 valve sizes? can you even do that? and how good of a head do i have to start with? the engine will end up as a truck engine so i''''m not sure what effect this would have.
also what else do you guys recomend?

< Message edited by lablue96 -- 8/24/2008 12:34:46 PM >

Post #: 1

RE: on to the heads - 8/24/2008 7:03:12 PM

old dog

Posts: 324
Joined: 12/25/2007
Status: online

i have done it many times ,but it will do you no good on the street with the bigger valve''s ,or port matching .the rough port surface''s will actually help you for low rpm street use in keeping the air fuel mix from puddeling and help with low end tourque .

_____________________________

william j allison

(in reply to lablue96)

Post #: 2

RE: on to the heads - 8/30/2008 12:11:39 AM

lablue96

Posts: 8
Joined: 8/20/2008
Status: offline

thanks old dog. i know what you mean, i need some torbulence to keep the fuel mixture, i was just thinking polishing the exaust and the combustion chamber, and maybe just cleaning up the intake a little while leaving it rough.
only one reply, i thought i would get more options than that, it will still be a street engine, but that doesn''t mean i want more power out of it, i guess i just don''t know the effect of larger valves on the power curve.
how much can the stock heads handle? so far what i have for the engine is a performer intake and carb from edelbrock, some roller rockers and looking for a cam later on.
opinions anyone?

(in reply to old dog)

Post #: 3