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ChadS
10-04-2007 10:44:38
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Re: h stroker crank in reply to jason pohlman, 10-02-2007 14:36:57
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| jason pohlman said: (quoted from post at 14:36:57 10/02/07) how about staying with a 3.800 bore and using the 6"stroke? will the block hold up to this with out the sleeves? by the way what is the difference between a 350 tractor block and a 350 industrial block? is one better then the other? thanks jason |
It would all come down to the rod and piston combo. The rods would have to shorter than stock, with an offset rod cap, best explained as a smaller version of a "Stock" stroker rod, a miniature version tuned in to spec. In areas known where the stock rods limits are, thats where to modify the changes in the new rod for added clearence, proper rod length, and speced out to the new rod journal size. Best description of what to do to know for sure is to have a Mock block, that crank and piston selected, and with a 2X4, and some wood working skills, widdle out a rod out out of wood, and take it to somebody who builds rods and make a deal. Put it together, thats the short block,,,,, A largely ported, low compression cyl head would work, keeping the cyl presure under 250 psi, but over 225 psi, cause it has a potential of 300+ with a 350 gas head with a flat top piston,,,, cyl pressure will have to be dropped so it wont self destruct. If the block had hardened steel sleeve inserts (dry sleeves) Id be more amped to run the cyl pressures up to 270-285 psi, but cast block, under that kind of pressure (250+psi) I dont think it would hold for long till it split a cyl. I figured a 350 block at 3.8125 bore possibly handling up to 275 psi with a 5-3/4 stroker, so Id start with low cyl pressure and give it a try,, I know a 5-3/4 stroker with stock rods is capable of 295 psi at cranking speed, with flat top pistons, with an 8043DC cyl head with .100 milled off. Hope this helps,,, But, I would give it shot to see if it fly, Id hear it run for sure if it cleared. Just my opinion. Currently building a 3.8125 X 5-3/4 300 block. ChadS. [email protected]
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