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Re: Rebuilding my sb400... Any suggestions?
Quote:
Originally Posted by sdavid
Airgap is a good intake. The performer will do fine for what you are building also. It should not take much to make the 30 over 400 a strong engine. The vortec heads will flow good, but they will limit your cam lift height unless you get them machined. Sounds like your plans are for a cam that is not too radical so you should be OK. Use a cam that will have a RPM range of 1000 to 5500 and it will probably be what you want. Something like a 268 advertised duration, or maybe a tad larger with the bigger cubic inches. And all of this depends on the compression ratio you are going to have.
Most cams are advertised for 350 cubic inch motor, so the same cam in a 406ci motor will act smaller.
You might want a 650cfm carb to help the new motor breath.
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And be sure you're using dished pistons to keep the compression pump-gas/street friendly.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....
Cubic inches is like Indiana Jones with a cheap pistol.
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