__________________ , Factory LS2 (364) crank, rods, pistons, N/A , A.S. 5.3 heads, LG G5X4 camshaft, FAST 90/90, Performabuilt level 3 4L60E, ARH 1 7/8's, Circle D 230mm converter, full lineup of Spohn hardware out back -- P.B.= firstname.lastname@example.org - 60'= 1.30 10/19/09
Speed Density Tuned by Kaltech tuning on Long Island www.kaltechtuning.com
Did this with a GM head and pump gas!
Broke my LS1 at 6500 rpms constant shifting at 84k miles. Some guys get 200,000 miles and over and some guys break them at 34k miles. Push the engine beyond what it was built for and you should be prepared to break something.
im in the same boat with warranty bolt ons for me right now.. and im debating nitrous for the time being.. but as soon as warranty is up in 2 years.. im doing rebuild with cam and heads! 550whp in my future with nitrous on the side plenty good for me..
It's more of a function of piston speed, not rpm. For example. the ls7 has a 4" stroke, piston speed is higher at 7200 rpm on that motor than say 7500rpm on a stock ls1. U are moving the piston at a given speed, and then instantly making it change directions and still move at that speed. This is where the weight and durability of the rods and pistons come in to play. Heavy parts and weak bolts= failure. Gm used ti rods in the ls7 and prolly shed 100+ grams of reciprocating mass, this increased high-rpm durability. Another thing to consider is HOW LONG u want to spin it that high, the oiling system in these motors will not tolerate prolonged high-rpm w/o modification. Oil pressure goes away and all bets are off, your engine will now fit loosely in a 5-gallon bucket.