Help with BB heads
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Joined: Jul 2005
Posts: 78
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From: Florida
Help with BB heads
I'm building a bbc 454 +.30 with flat top pistons. I have a nice set of oval port heads #3986133. I know their are truck heads, but I can not find the chamber size. I have looked in many places but they just give year and what they were used on. Before I can order my hyd. roller cam I have to know a approx. size to figure out compression. I have a similar problem with the pistons. I will post a new thread on that. 
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Joined: Jul 2005
Posts: 78
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From: Florida
NO not peanut. Large oval ports. No I don't know what they were on. The person I got them from was using them on a drag motor. I know they were used on the years form 68-90.
Last edited by Mr.L; Feb 10, 2006 at 12:18 PM.
Safety Car
Joined: Feb 2006
Posts: 4,855
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From: Columbia South Carolina
You could always CC them yourself, Its no too hard just use a syringe and a piece of clear plastic or you can still ball park it with out the plastic. Insert the spark plug for alittle more accuracy.
Race Director
Joined: Nov 2000
Posts: 11,872
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From: Waterloo ontario Canada
Originally Posted by 454_71Stingray
You could always CC them yourself, Its no too hard just use a syringe and a piece of clear plastic or you can still ball park it with out the plastic. Insert the spark plug for alittle more accuracy.
They are better then you think and with a little port work, the larger valves and they would out perform the rectangular heads on the street.
The late Lingenfelter claimed they were good up to about 600 horse.
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Race Director
Joined: Nov 2000
Posts: 11,872
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From: Waterloo ontario Canada
Originally Posted by Mr.L
I stand corrected. I took set one out. On the outside 2.20-1.90.
