Will these BBC heads support 500hp?
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Instructor
Joined: Dec 2002
Posts: 115
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From: pinehurst nc
Will these BBC heads support 500hp?
Prior to tearing down my 72 vert for the frame off I was running a BBC 396 with #6272292 oval port open chamber iron heads. The heads have been deburred, bronze guides, larger 2.19/1.88 ferrea valves with hardened seats installed. I was very happy with these heads matched with a comp cams extreme energy cam. I now plan to build a 496 to drop in and would like to have about 500hp. Does anyone know if these heads will support this goal and if so a recommendation on cam, intake, carb, etc? Primarily street duty with occasioanl trips to the track for fun. Thanks
Melting Slicks
Joined: Oct 2008
Posts: 2,154
Likes: 69
From: Regina Sk Canada
I made 550 HP with a 11.25-1 compression 427 with Edelbrock RPM performer oval head and a mild Hydraulic roller cam. Open chamber heads will flow way better than closed chamber as well. EVEN A bs 496 WILL MADE 500 HP, BUT THE HEADS WILL BE THE BOTTLE NECK UNLESS YOU GET SOMEBODY TO DO A BUNCH OF BOWL WORK, AND WORK BEHIND THE VALVE. They will be done by 5500-5800
Drifting
Joined: Oct 2005
Posts: 1,528
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From: East London/SW Essex UK
My 489 with mild hydraulic cam, rpm inlet & 10.5 cr Brodix Race Rite 'small' oval port heads on dyno made 528 hp @ 5800 rpm - more importantly it made 565 ft/lbs torque @ 3800 rpm!
Last edited by roscobbc; Sep 8, 2009 at 09:43 PM. Reason: punc
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Melting Slicks
Joined: Oct 2008
Posts: 2,154
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From: Regina Sk Canada
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Burning Brakes
Joined: Oct 2002
Posts: 914
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From: Aberdeen, Scotland
489 in the UK
Rosco,
That's cool having that in England. I have lived in the UK for something like 13 years at a few different times. I just moved over from Aberdeen about 12 months ago. I still call home the USA.
CC
That's cool having that in England. I have lived in the UK for something like 13 years at a few different times. I just moved over from Aberdeen about 12 months ago. I still call home the USA.
CC
Drifting
Joined: Oct 2005
Posts: 1,528
Likes: 148
From: East London/SW Essex UK
For example F1 racing - it just has to be the automotive equivalent to golf, dosen't it? 
