Is it possible to attain a 10.5:1 compression ratio in an LQ4 with pistons alone? Or is head work needed also. I think the stock piston/rod specs are like 4" stroke, 3.62" bore and 6.095" rod lentgh. Is that correct? Ive been looking at Diamond slugs but dont know which to look for.

 

Holy ****!! 11 views and no replies? What kind of board is this? What do I need to add to my post to get a reply?

 

boobies

 

Yes, your numbers are correct on a 6.0L bottom end.

I'm confused on your other questions...

 

Original question is in my original post.... "Is it possible to attain a 10.5:1 compression ratio in an LQ4 with pistons alone?"

 

Jared,

I'd suggest you talk directly with the folks at Diamond for a technically correct answer. BTW, the 6.0 bore is 4.00", and stroke is 3.62...you had it reversed in your post. Rod length is correct.

Andy

 

I may have to do that. I didnt realize I had the specs crossed.

 

i think you can run close to 10.5 to 1 if you use an Lq9 piston and mill the heads

 

... and run a thinner head gasket.

 

I might be wrong , but I believe the only difference between the LQ4 & LQ9 are the pistons. The LQ4 uses dished pistons and the LQ9 uses flat top pistons.

=Dave