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Old 03-02-2009, 05:58 PM   #1
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Default Boosted LS2 power limits?

I'm looking at a Vette with an LS2, it was done by East Coast Supercharging in NJ. The car has a cam, Paxton supercharger and dual nozzle meth kit, and is putting down 730whp on a Dynopack (never heard of that one before)

Ticking time bomb? I was thinking if I did get the vehicle to tame it down some...but ah whats the fun in that

I was just looking to see what you guys thought of it, too much power for a stock bottom end?

He's using VP Racing Methanol...not washer fluid lol
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Old 03-02-2009, 06:42 PM   #2
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how much boost is it running?

Any internal upgrade like forged pistons etc?

730whp seems like a lot on a untouched ls2... thats about 780flywheel
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Old 03-02-2009, 06:45 PM   #3
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12-13lbs
Meth comes in around 6lbs

Stock internals except a cam
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Old 03-02-2009, 06:58 PM   #4
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It's bound to go sooner or later, all it could take would be some good crisp air, or a tank of gas that's not quite what it is supposed to be. The stock pistons and rods are on the weak side for the power this car is making. Bob
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Old 03-02-2009, 07:03 PM   #5
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damn, that's what I was afraid of...and it's a pretty good deal too
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Old 03-02-2009, 07:23 PM   #6
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So what should I have it tuned down to? Still use the meth?

What will she be like on the street with ___ power level
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Old 03-02-2009, 07:41 PM   #7
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If it's a "good deal" then buy it and have the stock block pulled for a forged rod and piston swap + some ARP hardware and you'd be good to go. You might even want to pulley up and push 17-19psi with pump and meth. $.02
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Old 03-02-2009, 08:04 PM   #8
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big bucks for that though?
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Old 03-02-2009, 08:31 PM   #9
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a boost ready shortblock if you re-use your stock block and crank (maybe)prolly cost ya bout 4k for a decent build
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Old 03-02-2009, 08:33 PM   #10
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'eh too much for what I want to do

What about detuning the car?
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Old 03-02-2009, 08:52 PM   #11
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If your leak down test (ECS is willing to check before sale) comes up good, ECS will be honest with you, just run 7-8lbs for 550-600rwhp on the safe side. No need for the meth at that level. Otherwise, swap out a forged shortblock and turn the boost up.

Yea, youre looking at an extra $5-7K with a forged 402 installed (I would do). The guy has taken really good care of the car though, but more opinions on here will help you decide. I would do it, I would just drop the boost a bit and save for a shortblock. That would be a fun car with 800+ to the tires.
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Old 03-02-2009, 09:03 PM   #12
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yeah probably the best option

it's a damned shame to turn DOWN the horsepower on a car
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Old 03-02-2009, 09:06 PM   #13
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Mr.Big has been running his stock bottom end, Procharged LS2 for what I think is 15-20kmi and is making ~750rwhp. He is one of the few and the proud. If you can't afford to be wrong, turn it down to 650rwhp and be done with it.
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Old 03-02-2009, 09:08 PM   #14
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might be a stupid question, but when I had the GTO, I rarely pushed the car past 5k I think

sure if I was doing a burn out she'd rev up, but if I pushed it that hard accelerating, I'd be hitting triple digits before I knew it

Keeping my foot out of it would basically be doing the same thing as turning down the boost, right?

ah now I'm just trying to justify keeping it at 730whp lol

BTW that was done on a "Dynopack"...never heard of that. perhaps the numbers are on the high side? Like a dynojet vs mustang dyno
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Old 03-02-2009, 09:09 PM   #15
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Quote:
Originally Posted by BLOWNBLUEZ06 View Post
Mr.Big has been running his stock bottom end, Procharged LS2 for what I think is 15-20kmi and is making ~750rwhp. He is one of the few and the proud. If you can't afford to be wrong, turn it down to 650rwhp and be done with it.
wow, nice!

I'm lucky to put 1,000 miles on my car in a year!
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Old 03-02-2009, 09:11 PM   #16
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The boost and horsepower is RPM reliant, so if you're set up and tuned properly, there's a good chance you can get away with doing it that way.

I believe the Dynopack is the one that bolts to the car like the wheel does. If it's at ECS, it's good. Those guys don't mess around.
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Old 03-02-2009, 09:26 PM   #17
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Quote:
Originally Posted by MetallicaMatt View Post
might be a stupid question, but when I had the GTO, I rarely pushed the car past 5k I think

sure if I was doing a burn out she'd rev up, but if I pushed it that hard accelerating, I'd be hitting triple digits before I knew it

Keeping my foot out of it would basically be doing the same thing as turning down the boost, right?

ah now I'm just trying to justify keeping it at 730whp lol

BTW that was done on a "Dynopack"...never heard of that. perhaps the numbers are on the high side? Like a dynojet vs mustang dyno
If you don't have the $$ up front for the $3-4K forged rebuild then you could buy the car, put in a shift light at 5500rpm or so to give you a warning that you're risking it. Or you could lower the rev limiter to the rpm on the graph where it's making 600rwhp. When you save up the 3-4K which will be sooner than you think, you can forge the motor.
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Old 03-02-2009, 09:35 PM   #18
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Quote:
Originally Posted by BLOWNBLUEZ06 View Post
The boost and horsepower is RPM reliant, so if you're set up and tuned properly, there's a good chance you can get away with doing it that way.

I believe the Dynopack is the one that bolts to the car like the wheel does. If it's at ECS, it's good. Those guys don't mess around.
Correct, this is an ECS car
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Old 03-02-2009, 09:36 PM   #19
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Quote:
Originally Posted by 93formto98T/A View Post
If you don't have the $$ up front for the $3-4K forged rebuild then you could buy the car, put in a shift light at 5500rpm or so to give you a warning that you're risking it. Or you could lower the rev limiter to the rpm on the graph where it's making 600rwhp. When you save up the 3-4K which will be sooner than you think, you can forge the motor.
Ah perfect idea!

I'll just bump the rev limited down a tad, keep the meth on the car incase it still needs it.

what about 650? haha
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Old 03-02-2009, 10:24 PM   #20
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ECS does good work from what i hear
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