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Bbc 454 build.

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Old 01-08-2019, 07:00 PM
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Sounds about right with that cam.
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Old 01-09-2019, 05:37 AM
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Originally Posted by seaman
i found an extra copy of the dyno sheet but don't know how to post it on here the motor made 431hp at 4800 and 527tq at 3600
Can you send it to my email? [email protected]. I can try to post it here.
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Old 01-09-2019, 06:38 PM
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email sent
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Old 01-10-2019, 01:56 AM
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Seamans dyno sheet.
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Old 01-10-2019, 02:37 AM
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Here is my last sbc 377cid build with same duration camshaft. Comp xe262. 218/224.110 lsa. Hydraulic flat tappet. It made over 1hp per cubic inch with tiny 155cc intake runner.
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Old 01-10-2019, 02:58 AM
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Professional engine builders usually recalls tight lsa cams with tiny valves/ports. Would be nice to see the Seamans engine dyno sheet, with tighter lsa cam instead of wide 112lsa. I think the 1hp per cubic inch would be found there.
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Old 01-10-2019, 06:27 AM
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Originally Posted by JaniH
Professional engine builders usually recalls tight lsa cams with tiny valves/ports. Would be nice to see the Seamans engine dyno sheet, with tighter lsa cam instead of wide 112lsa. I think the 1hp per cubic inch would be found there.
I did my 454's w/ a 110 lsa,230,236 on semi opened ovals ported to death,victor jr and a 930 bolaw's carb,1 made 524hp other made 521hp,,both had rough 517tq,,to suckers ran good,very snappy in my boat.
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Old 01-10-2019, 07:40 AM
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Originally Posted by sutphen 30
I did my 454's w/ a 110 lsa,230,236 on semi opened ovals ported to death,victor jr and a 930 bolaw's carb,1 made 524hp other made 521hp,,both had rough 517tq,,to suckers ran good,very snappy in my boat.
Stock valve sizes?
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Old 01-10-2019, 06:19 PM
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Originally Posted by JaniH
Stock valve sizes?
2.19" intake,1.88" exhaust,relieved the combustion chamber near the valves and bore notched the block.
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Old 01-10-2019, 09:11 PM
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And what heads were you using>
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