Mike Prychka

hi guys.. ok I am building a 6.0 iron block motor. I plan to buy a forged rotating assembly but keep the stock stroke.. the reasoning is I would like to eventually build a de-stroked motor when I buy and aftermarket block..

I am not sure what cubic inches you can buy the aftermarket blocks in but my theory was of the old school "350" rotating assembly in a "400" block would make a 377.. and they were good for high rpm..

im curious if I got a 400 some cubic inch block, could I use the 6.0 rotating assembly and round about what cubic inch would it come out to be..

I know that people are building 408-420 c.i. motors from stock 6.0 blocks and I know they are going 450-500 ci with aftermarket blocks.. I worked on a outlaw 10.5 car that still hung with the big block twin turbo cars of 600+ cubic inches and it was only a 377 sbc with a single turbo.. it spun past 10,000 rpms...

soo I hope my post isn't to bland. basically what c.i. aftermarket block options are there before we stroke them.. thanks in advance. I did try to search and didn't find what I was looking for. sorry for typical noob ****

NAVYBLUE210

LSX Iron Block can be bored 4.200" most don't bore past 4.185"
Stock Stroke with 4.185" Bore = 400". I am having built
4.175" Bore with stock stroke in a LSX Iron Block for 396".

A.R. Shale Targa

iTrader: (2)

Also a 4.8 (3.268") crank in an LS7 block ends up right about 350 inches.
I'd rather have the lighter aluminum block and the 4.8 cranks because of the short rod throw are quite strong.

SCott5

iTrader: (40)

I have been wanting to do a 4.8 crank in a ls2 block with solid roller 6 speed setup in a light foxbody coupe in the worst way. There have been a few combos that I have seen with this setup and seem to have good results

Mike Prychka

thanks guys. thank you very much navyblue... your answer is what i was looking for..

after i make decent power with the stock block and get after market heads ill get the aftermarket block. my goal was to have a 400 some cubic inch block with the 6.0 crank... and just spin it alot higher rpm wise and push the motor more with an aftermarket block.

but i dont think it is going to be really worth it as much... i calculated something around 392-396 cubic inches.. i originally wanted to keep the stock cubes in my 6.0 to try to break the stock cubic inch et record but.. maybe i will just do a 402-408 stroke with the 6.0.... i can make alot more power im sure with the stroked motor possibly.

curious what would the 402-408 stroke crank (from stock iron 6.0) come out to with a 400 cubic inch block??? sorry if im asking dumb questions.. im used to the old school stroke numbers i dont know the newer stuff..

SCott5

iTrader: (40)

IM confused what your asking? If you want a 402-408 CI on a iron block 6.0 you will need a 4in crank and stock is 3.622... Is that what you are asking?

Jontall

I stick with a 3.622 stroke crank because it's easy to get from Callies.

Mike Prychka

sorry... was curious what cubic inch, the 4 inch crank would be with the 4.125 bore.. im thinking it would be around a 427?? sorry for the confusion..


when i am ready for the forged bottom end i will go with the stroked crank instead of stock stroke i can just make more power cheaper.