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Author Topic:   will a 307 crank fit in a 350 block or vise versa
ray14
Member
posted October 03, 2002 09:22 AM
hello i have a few questions i have a great little 307 not sure what the stroke is but i thnik they have a shorter stroke than 350 i was wondering what the results would be bye putting 307 crank in 350 block or 350 crank in a 307 block.i have both and just experimenting.thanks for all info on this


c21
Member
posted October 03, 2002 10:49 AM
has anyone ran those combinations before and how much would it change the performance of them both thanks for the info c21


birdcage
Member
posted October 04, 2002 03:02 AM
what engines have a 3.905 bore 350's are 4.00 bore aren't they? im just eperimenting with small block chevy's never have built a stroker or destroked one but really would like to i think it would be better than my little 355.


tilley88
Member
posted October 04, 2002 09:46 PM
Ran a 307 block bored .125 thou. with a 350 crank, comes out at 350 standard bore, fast and reliable. Only prob is lack of bore-out later.


birdcage
Member
posted October 06, 2002 01:36 AM
wanna sale that motor?


birdcage
Member
posted October 08, 2002 02:56 AM
IF ray14 doesn't buy them. How much do you want for them.


racer 4
Member
posted October 22, 2002 08:33 PM
birdcage, the compresion ratio was guessed at 13.6 to 14.0 and the cam is only .540/.557 lift the track i will be running is a smooth dry little bull ring with a hoosier ump tire i figured turning it to 7500 you think 8000 is ok with that 3.75 stroke?


birdcage
Member
posted October 23, 2002 02:44 AM
I always turned my 311 (3.25 stroke) 8600 rpm even when it still had stock rods but it has pretty light pistons for a 311. I had to replace the crank at every freshening because it would be cracked. The 335 (3.49 stroke)i turned 8400 the two races I ran it but a friend drove one of my spare cars with it and was turning the **** out of it. Never got the see the tel-tec as he stop on the front straight for trophy. But he was running a 6.32 gear on a fast 1/2 mile. I was running a 6.18 w/ a all alum 18* 360 and I was turning 8700. He was just under powered against these motors so we put a gear in it. I couldn't catch him thought!!
Both mine aren't 3.75 stroke but I don't think I'd be to worried about turning it some. I gear mine so it comes off the corner like I want and let it turn what it will. I figure if it can't take it I didn't want it anyway.


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