racecar

I have heard some of the negatives about LS7 blocks, like cracked cylinder walls etc. but I can buy a new one for quite a few $ less than a bored and sleeved LS2. I like the 4.125 bore x 4.00 stroke combination for road racing.
Is anyone racing an LS7 block without problems? Is it all bad with these blocks, anyone have anything good to say?

Katech_Jason

iTrader: (19)

http://www.katechengines.com/katech_...ease.php?id=54


We have supplied Street Attack and Track Attack LS7s for off-road Baja teams for the last year and a half. They are racing these in the desert and are very hard on them. We have had zero engine failures.

racecar

Thanks Jason, That would imply that it's a safe bet to run a LS7 block, LS7 heads, 11:1 with a 248/254 cam in a road race car at 6600 rpm without expecting any block failure. I keep hearing about these cracked cylinders, I'm trying to guess if this is 5 out of 100, or 5 out of 1000. There have to be plenty of ZO6 owners running these cars hard on race tracks.