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Old 04-05-2012, 05:24 PM   #1
anubisani
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Default BBC 990 HEADS

What the biggest in terms of cubic in. can a Gm 990 head support with some port clean up an 219 /188 valves or 225/188 valves THANKS IN ADVANCE
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Old 04-05-2012, 06:30 PM   #2
biggmal
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Default Re: BBC 990 HEADS

I had a pair on my 468 with 2.25 and 1.88 and i made 720hp with 11.5 comp. You may be able to go up to a 496, the guy i sold them to made 800hp on his motor with 13.5 comp.
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Old 04-05-2012, 08:06 PM   #3
scott foxwell
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Default Re: BBC 990 HEADS

With a 2.25, big throat and some decent work, I wouldn't hesitate ot put a set on a 540. Would they be ideal? Of course not, but they would/could support well over 800hp.
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Old 04-05-2012, 08:39 PM   #4
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Default Re: BBC 990 HEADS

Quote:
Originally Posted by biggmal View Post
I had a pair on my 468 with 2.25 and 1.88 and i made 720hp with 11.5 comp. You may be able to go up to a 496, the guy i sold them to made 800hp on his motor with 13.5 comp.
thats what i am putting them on a 468 but i want to be sure they can grow as i grow thanks i want to get a 540 or 555 next
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