[jesse01]

ok you guys ready for this? hope you can keep up don't let me loose you here

alright i was getting ready to rebuild my 383 stroker and i already have my new pistons, there for a 5.7" rod. Then i had a change of mind and was going to return them for a 6.00" rod, but then i had this monstrosity of an idea

what if i kept my pistons that i have now (for a 5.7" rod) put them on a 6" rod & a 302 crankshaft w/a 3.00 stroke then wrapped it all together inside of a 350 block?

ok i know somebody out there will say it won't work just because these parts werent' originally ment to be together, but i don't believe thats true (obviously). Heres what i came to conclude thus far:
I take the stroke of my crank & divide it in half which will give me 1.5", than i add the 6" rodd in there,& last but not least i throw in the distance from the wrist pin to the piston head which is 1.56"

ok you still w/me? this is what i got so far:
1.5" + 6" + 1.56" =9.06"

alright everyone knows that the deck height is 9.025 (unless it's modified, or a custom block, or something) so if you take the deck height 9.025" - 9.06" stroke = -0.035"

do you fellas think i could take the crank to the machine shop and have them grind & index it to decrease the stroke a little bit so my pistons would be just inside the deck height? I think it might be possible, but every motorhead is like a doctor it's nice to have a 2nd oponion, or a 3rd, or a 4th,etc......

thanx all

Jesse

[280zxWith305]

ok and what are you trying to get out of all of this? what CI do you intend on pulling off with this setup... or are you more intrested in a rev'ver?

[jesse01]

was just a wicked thaught, and wanted another oponion on it 1st
still thinking it over especially since i just priced a 302 crank @ $1000

[Ohio-Dan]

A 383 piston, that uses a 5.7" rod, doesn't have a 1.56" pin height.......Dan

[NAIRB]

Dan is correct, your compression distance on a 5.7 383 piston will be around 1.425. 1.875+5.7+1.425= 9.0

(approximate)

[jesse01]

I finally found the info on 'em there 1.433

so 1.875" + 5.7" + 1.433 =9.008 thats about right for a 383, right?

i wanted to make a one of a kind, but i think i'll stick w/ the 383 insted

[johnsongrass1]

With a 2.0 rod/stroke ratio, the engine would be a lazy till better than 7000. You would have to turn it near 9800 to make power.

[matt_ramsey]

350 and 302 are both 4" bore engines. If you put a 3" 302 crank in a 350 block, you just get a 302.

[matt_ramsey]

and for information's sake a standard 302 also uses a 5.7" rod, that's why the figures work out so conveniently.

[KNanthrup]

Run a 283 crank instead! Hah.. well you probably can't do that given journal sizes..

[jimfulco]

Then there's the 5.94" PM rod made by GM for the '94-'96 L99 4.3L V-8 Caprice motor (AKA the "baby LT1"), which used a 3" stroke & pistons with the same height as 350 pistons.

1.50 + 1.56 + 5.94 = 9.00

1.625 + 1.433+ 5.94 = 8.998 (that's with a 307/327 crank)