I have a few questions but also want opinions. I just picked up a 6.0 iron block fresh from the machine shop. It is bored to 4.065 and is notched for a 4-inch stroke. I think this is pretty rare. I haven't heard of anyone else doing this to get 415 c.i. I bought it for a great price and it came with wiseco nitrous pistons. Please chime in and let me know what you think. Thanks in advance to everyone.

 

Thanks for the link. I will be watching for new post there also. My machine shop said it will be fine. Will run nitrous through, once in a while but should be able to get the job done on the motor most of the time.

 

Schwanke ahortblocks builds iron 376/415/427ci ahortblocks for dirt racing. I think Thompson motosports sells iron stroker with the same bore as well. Idk about the durability in a street application, but for track use I'm gonna say it would be fine...otherwise they wouldn't sell such a product.

 

Thanks for the info.i Never know they were sold.

 

Interesting

 

Build is coming along great. Thanks for all the help.

 

it's long been said that you want to keep the motor square for street use at no more than 4.030/4.060 bore and no more than 4.0 stroke. reason being the skirts in the LQ4/LQ9 iron blocks are shorter and the piston has issues "rocking" in the bottom of the bore with such a large stroke. even on a 4.030/4.00 (408cid) the issue exists to some degree but is within "acceptable" limits for "street" use.