BBC heads

B

bracketchev1221

Master Mechanic
Jan 18, 2018
418
63
Here is a listing of all head castings. Even though they may be listed as closed and open chamber heads, there were variations in chamber size. The smallest closed chamber heads were like 98cc and the largest closed chamber heads were about 108. Then they got into semi open that were about 113 and then true open chamber heads were 118-119.
 
Clutch

Clutch

Comic Book Super Hero
Apr 7, 2017
3,665
113
Brick NJ
Ok guys new question?? And I just want an educated guess 206 heads on my basically stock bottom end with the stock dished pistons what will my approximate compression ratio be? Also with that set up a performer intake and comp cams Xtreme Energy 11-238-3 what is your best guess on horsepower and torque? I know it's much more technical than that but a guess would be cool thanks again guys
 
TURNA

TURNA

Geezer
Jul 24, 2009
7,779
113
Socialist NY
9-9.5 prob closer to 9
 
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TURNA

TURNA

Geezer
Jul 24, 2009
7,779
113
Socialist NY
The 396 used all the same heads the years the 206 's were used

compression ratios varied from 8.5 to 11

They only differences were pistons cam and carbs
 
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Clutch

Clutch

Comic Book Super Hero
Apr 7, 2017
3,665
113
Brick NJ
9-9.5 prob closer to 9
Good that's what I was shooting for the cam works best with under 9.5 and it being a work truck I want to be able to run pump crap. It may get a set of headers to I have a set but I don't know what there for
 
olds307 and 403

olds307 and 403

Comic Book Super Hero
Oct 14, 2008
4,519
113
Melville,Saskatchewan
I would be most headers will work with all the room on a square body.
 

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