What to do with lq4 that needs boring?
What to do with lq4 that needs boring? Picked up a lq4 short block for $200 bucks. The guy I got it from let it get water in the cylinders and one is pitted so I am not sure if it will hone out or not. He said it lost oil pressure and started knocking when he was going down the side of a mountain so he bought a used motor and installed it. He told me it had less than 40k on the motor and that is probably about right, it has no ring groove but that dosen't mean a lot on these motors since the last 4.8 I had apart had 103K and it had zero ring groove. If I have to bore it I was thinking of doing a 370 with some ls6 heads, maybe a fast 90/90, big *** cam, have some new pacesetter long tubes, and it will be in front of a t56. I am also thinking by the time I buy pistons, rings, bearings, machine work, etc that I might be better off buying a lq9 and doing heads, cam, intake, etc since I can buy a lq9 for $1500. The last ls motor I had bored was a 4.8 that I put ls1 internals in was about $340 for the bore and having the crank turned. I would like to get in the 450 to 500 rwhp range so shoot me in the right direction guys. Thanks in advance...
Well, you could probably go out to a 4.060" bore or so if you are only shooting for 500whp, but 4.030" will probably get it out. At least from there you would have more material to hone out if you ever need to rebuild again. A big *** cam probably isn't necessary either.
BTW, isn't a LQ4 a 6.0L or is it smaller?
BTW, isn't a LQ4 a 6.0L or is it smaller?
Well, you could probably go out to a 4.060" bore or so if you are only shooting for 500whp, but 4.030" will probably get it out. At least from there you would have more material to hone out if you ever need to rebuild again. A big *** cam probably isn't necessary either.
BTW, isn't a LQ4 a 6.0L or is it smaller?
BTW, isn't a LQ4 a 6.0L or is it smaller?
This is going in a street/show vehicle that is never going to be a daily driver. Thanks in advance..... 
4.030 would be your best bet. I've done 4.060 in my personal motors without any issues, but 4.030 would be your best option. We sell Diamond & Mahle pistons in the 4.030 flavor that are awesome pistons for the money. Do you plan on running aftermarket rods also? Give us a call if we can help, we stock huge numbers of pistons so we probably have your setup in stock!
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
