Pump gas 421 SBC HP
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Re: Pump gas 421 SBC HP
Final graph
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Re: Pump gas 421 SBC HP
I love these small cam builds. Mt, any porting work? Thanks, Charlie
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Re: Pump gas 421 SBC HP
472 observed HP @ 900 feet elevation, 29.10 baro, derived from the first sheet posted.
Racing a NA NHRA stocker should be mandatory before any posting.
Re: Pump gas 421 SBC HP
With only 0.0460" lift, the cam specs are surely 'advertised' rather than @ 0.050", so how can it possibly be still gaining power at over 6500 RPM?
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
- mt-engines
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- Joined: Fri Sep 27, 2019 12:35 pm
- Location: MN
- mt-engines
- Expert
- Posts: 880
- Joined: Fri Sep 27, 2019 12:35 pm
- Location: MN
Re: Pump gas 421 SBC HP
He bought my 80496-1 950 dyno carb. It picked up everywhere and allowed it to spin higher than planned.
- mt-engines
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Re: Pump gas 421 SBC HP
I get compression at 10.3:1. I'm curious about the cam. With such small numbers you clearly have done your homework to achieve the HP numbers posted.
So much to do, so little time...
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Re: Pump gas 421 SBC HP
This is not a Racing Engine, i am quite sure the .460" is at the valve and the Duration numbers are "Not" @ .050" lifter rise. I believe what we are seeing here is an example of what a great Carb, Intake, and well prepped cylinder heads can do in spite of a small numbers Camshaft. Mark H.
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Re: Pump gas 421 SBC HP
Remember, the more efficient the intake tract is from the carb booster to the bottom side of the valve seat, the less camshaft ( especially ) duration will be needed. I will say, if the net valve lift is " only " .460". that is a surprisingly small amount. Mark H.
Re: Pump gas 421 SBC HP
594 hp @ 6700 worth?swampbuggy wrote: ↑Sun Jun 06, 2021 11:01 am Remember, the more efficient the intake tract is from the carb booster to the bottom side of the valve seat, the less camshaft ( especially ) duration will be needed. I will say, if the net valve lift is " only " .460". that is a surprisingly small amount. Mark H.
Jim
Re: Pump gas 421 SBC HP
Where is the "ENGINE TECH"..........you post basic spec build and will not answer people with genuine questions........
I thought we are on here to learn and grow.
I thought we are on here to learn and grow.