help with heads
#1
Thread Starter
Member
Joined: Oct 2003
Posts: 193
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From: ohio
Car: 1992 camaro rs
Engine: 305 TBI
Transmission: 700r4
help with heads
ive been searchin all over and cant find it anywhere....do The AFR heads have the heat cross over for egr and stuff so its a direct bolt on or do i need to go with the edelbrock heads for a direct bolt on.......if they do ill get afr's if not ill get eddies....
#2
Thread Starter
Member
Joined: Oct 2003
Posts: 193
Likes: 0
From: ohio
Car: 1992 camaro rs
Engine: 305 TBI
Transmission: 700r4
anyone?.....are the AFR's direct bolt ons onto a stock l98 or do i have to worry bout anything else for the heads to work with the tpi system
#4
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Joined: Nov 2003
Posts: 574
Likes: 1
From: San Lorenzo, California
Car: 1987 Firebird Trans AM
Engine: 383 TPI...very soon
Transmission: TH700R4
There are AFR heads that have the heat crossover, the 180cc and 195cc "Street Heads" include the crossover.
They also have CARB numbers which means they are smog legal.
You can also order them with the older style or the new style intake pattern (the center bolts at the same angle as the rest or at the 72* angle)
If you are going to use them on a stock engine, you will need to order the smaller (67cc) chambered heads, however at 67cc's they will lower your compression ratio a bit on a stock engine, therefore you may want to have the heads milled a little to bring you back up to where your compression ratio is now.
On my engine, I am running flat top pistons, which would give me 11:1 compression with 64cc (stock) heads, but with these I am down to about 10.3:1, so I am guessing you would see about .7 drop in compression on a stock engine.
They also have CARB numbers which means they are smog legal.
You can also order them with the older style or the new style intake pattern (the center bolts at the same angle as the rest or at the 72* angle)
If you are going to use them on a stock engine, you will need to order the smaller (67cc) chambered heads, however at 67cc's they will lower your compression ratio a bit on a stock engine, therefore you may want to have the heads milled a little to bring you back up to where your compression ratio is now.
On my engine, I am running flat top pistons, which would give me 11:1 compression with 64cc (stock) heads, but with these I am down to about 10.3:1, so I am guessing you would see about .7 drop in compression on a stock engine.
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