xrated

When using the 3.875 inch stroke crank what rods are used 5.7 or 6"? I am very interested in this combo as i can get a new crank for $1200 aus and some slightly used aluminium racing rods from a fellow drag racer. I really want a BB but i dont want the extra weight. The 400 stroker sounds like a tourque demon!

PS Just found a 4" stroke crank. WHich one is used in the 396 stroker? Can someone work out the Ci of a 4" stroke and standard bore?

Thanks


[Modified by xrated, 5:02 AM 8/24/2001]

PatsLs1vette

dont use aluminum rods on the street they stretch have to be checked often....other people will reply the same i think...

64365coupe

the formula for cubic inches is: bore x bore x stroke x .7854 x 8 (number of cylinders.) or..... 4.125x4.125x4.000x.7854x8=427.6503 cubes
427 small block... how bout a 427/435? :yesnod:
I'd just make sure you have plenty if cylinder head and make sure that if you go with a 6'' rod that you can get a piston for it... if you want under 11:1
compression the pistons will have quite a dish and the 6'' rods might not work because the rings must be moved down the piston and the pin would be so high. I 'm building a street 434 right now and am using a 5.850 rod .
I think that will be your choice. just my opinion... :rolleyes:
mean motors though... see ya ! steve keech
sarasota florida
http://www.keechs.com
this info is based on the 400 block... 4.125 bore

xrated

I would be basing my calcs on a 350 block. For piston clearance i would use the 5.7 standard legnth rods? Will the standard sump fit?

gkull

You can run any crank or rod combo you want you kust have to buy the right pistons. I just use JE pistons and you just order by crank and rod size.

The 3.875 is the normal limit of a 350 block with big rods and bolts. Because you have to grind away the pan rails for clearance and buy a special oil pan. You get very close to the water jacket and in a worst case if you make it through you just have to epoxy fill the bottom of the block.

the 3.875 is the typical way to make a 396