Any ideas on why the LS2 seems to be able to handle so much more boost/HP output than expected. There are guys running over 600rwhp on the stock bottom ends and they aren't failing.

Anything change from the 2004 LS6?

 

Regular LS1's can hold up to over 600 rwhp with the proper fuel and tune.

Mark

 

550hp is the max on stock bottom end LS1s on average. Some may have over 600rwhp but I doubt there are many. Ive never heard of it but whatevers.

 

first off the LS2's and the LS6's are different motors practically different heads/cam/manifold/bla bla....and the LS2 has forged internals, or pistons at least...so just that in itself might be an obvious reason why boost+LS2+600rhwp are very possible

and by the way ive seen stock block LS1's/stock internals go over 650rwhp one on nitrous(667rwhp) and one on boost(about 700rwhp he basically wanted to see it blow up but didnt on one pass at 14psi)..and they ARE still holding decently well...like they all say, its basically all depending on the TUNE/Fuel System...

 

The LS2 has Hyperutectic pistons just like the LS6 did. Even the LS7 has Hyperutectic. GM would not use a forged slug because of emissions.

 

Which is why I said on average. Kinda interesting how someone running a few bolt ons on an untuned car has something to say about boost. I'll buy you a procharger if you bolt it up to your nearly stock vehicle and run more than 14psi or even 14psi.

 

also, LS2 heads are the same as LS6 heads..Nothing different except heavier valves...Same goes for the cam...its a 2001 LS6 cam...

 

LS2 is a 4in bore LS1 with a 2001 LS6 (385hp) cam and 243 casting heads with solid valves and the knock sensors relocated to the outside of the motor.... suprisingly enough with the solid valves and smaller cam the LS2 produces 400/400.

The piston's are cast, the crank is powder metal, and rod's are suppose to be sinister steel (what ever that is).

The LS2 Manifold by default doesn't flow as well as a LS6 due to manufactoring process, but once cleaned up can outflow a LS6 manifold.

Boosting is something I've decided not to try on mine as the 10.9:1 compression ratio makes me very weary of adders. Some folks go ahead and add a Magie but only put 2 to 4lbs of boost on em (kind of a waste of money to me).

With the faster computer and 58 point wheel.... nah that couldn't help out.


Heck didn't the first 2 to 3 years of the LS1 have forged pistons. I know my 99 T/A came with a electric engine warmer to kill the startup knock....maybe that's what it was for... kinda wish the LS2 had an engine warmer in the winter time to get up to operational temp's sooner....


Even with all the goodies that come in the LS2... the aftermarket parts surpass them all.

Stock 243's can't flow like a patriot stage 2 243... and can't come close to a set of ETP's
Stock cam.... blah GM replaced it in the LS6 and so do alot of the LS2 GTO owners.
Exhaust... yeah dual 2 1/2's stock isn't bad but headers and an x pipe can liven it up even more... then throw on some high flow muff's... oh yeah
Intake... the GTO's stock isn't to bad but the intak into the air box is kinda restrictive. CAI's with built in heatshields help alot especially if the put the maf/ait behind the heatshield...

HPTuners, LS2Edit, or Pred to tweak.... the stock settings pull so much out to keep the driveline intact it's pathedic.

Okay so the cam isn't exactly the 01 LS6 cam... its missing the LS1/LS6 style timing sensor (LS2's timing sensor is in the Cam Gear).

 

I dont think the LS motors ever had block heaters or forged pistons. I could be wrong.

 

The block heaters were an option..my dads 35th anniv. ss has it, but the forged pistons i highly doubt that

 

Wow, I have never seen or heard of a block heater in a 4th gen LS1 F-body.
Ya learn something every day!

 

apr sells a complete turbo kit that with the tune they send you, the tt kit for the vette is supposed to make 575rwhp on 10psi of boost reliably

 

98 and 99 F-bodies had a Engine Warmer as a $300 to $350 option from the factory....just can't remember the op code. Funny thing is it wasn't offered on the 02 models.

I remember when I order my 02 T/A in July of 01 that the options I added on were...
Pewter Metalic Paint and Tan Leather Interior. I wanted the lighter Cammel but it was only offered on the White, Red, and Black Exterior.
1LE suspension (Aluminum Drive shaft, springs, struts, and poly bushings)
MN6 (Manual Transmission)
Traction Control (can't remember the op code)
WS6 (hood, tires-n-rims, and a slp cat back) - to be honest it wasn't worth $3400

The 1LE wasn't on the invoice when I picked the car up (nor on the price tag ), but when I took it to my local exhaust shop and put it up on the rack... there were the 1LE parts in plain view... I think I got lucky by ordering it before they removed the option.

The engine warmer cut the warm up time down to around 3 minutes (from 6 to 8 minutes).... it just ment I could leave the parking lot at work sooner then my co-workers
Yeah I remember missing that on the 02 cause it took longer to warm up then the 99 t/a I traded in for the 02...but the heater would kickout heat at a reasonable time... it really needed heated seats in the winter though.

hmmm 10psi of boost and 10.9:1 cr - a diet of 93 octaine and some additive could get you to 100k before a rebuild, maybe?