Just curious, I read a little and found that a stock LS1 can support 500whp "reliably" and some have shown over 600whp on stock motor using turbo. I also from short readings saw ~9psi on stock motor is safe..

My question is, any guesses on what kind of power could be made with an aftercooled T76 (@9-10psi) and somewhere around a 60shot wet n2o (which would yield far more than 60whp on a turbo setup) and any reasons not to do this on stock internals? of course fuel delivery would be taken care of.

Thanks in advance for the help

 

my reason is i think you're gonna blow it up

you have a dyno/wideband to tune this thing on?

what octane you looking at running all the time?

i think get a turbo kit, get to 500rwhp on race gas.. and work up from there (with a spare motor on hand)

 

In my opinion, a small shot on top of 9psi on a stock engine is beyond asking for it.

If I supercharged or turbo'd a stock LS1, I personally wouldn't go past 6psi. They can probably handle 9psi intercooled, but I wouldn't risk that unless I was planning a full rebuild when it went.

If you want boost, you'd be best off rebuilding with lower compression and forged parts. It's a lot of $$, but again, my opinion's that you shouldn't screw with forced induction (which is a lot of money in itself) if you're not going to do it right.

 

There are hundreds of stock LS1s running 9psi without issues. I'm doing 7.5ish non-intercooled. As long as your tune is inline, it should last for a while. There was a member here who pushed 650rwhp on a Vortech/Juiced LS1 and it held. just be careful

 

I'm sure it'll hold, but the question is for how long. Compared to a stock engine, the longetivity could take a hit.

I just think 9psi + a shot is asking for trouble unless you plan on rebuilding it to be stronger.

 

the way i read, he wants 600rw on turbo alone, then spray 60 which would be worth another 125. not gonna happen

mikael, this guy was on the stock pistons?

tailwind.. im curious to what evidence made you sure it would hold? i cracked a factory piston at little more than 450rwhp...

 

Well, to back up what the guy above said, I've seen a couple stock engined LS1's running 9lbs intercooled.

But like I said, I don't know about the longetivity. They might've only lasted a few thousand miles, or they could still be running just as well today for all I know. If you look, I did say that I think he was easily asking for trouble with the setup he wanted.

 

There is a guy named Dug here in Phoenix running an old Incon TT kit on his 98 Camaro. His engine is completely stock except for the obvious turbos and exhaust. Mods ti his car include a 9" rear and stage 3 clutch. He also has upgraded his fuel system with bigger injectors and pump.

Dug has dynoed a best so far of 533rwhp on pure 91 octane pump gas at 9psi with LS1 edit tuning. This has taken his car to an uncorrected 11.59 @ 119.9mph at Firebird raceway, (1200' elevation) spinning the tires.

He has now purchased a methanol injection kit, and his first day on the dyno pulled 574rwhp with a SUPER rich A/F and 11psi. This was STILL on 91 octane pump gas. He is working on tuning the water/methanol injection ratio, and leaning out the injectors to get a better A/F ratio. This is all on a STOCK LS1 engine! Stock heads, stock cam, stock pistons. It has never been apart. He is now planning on installing stiffer valvesprings because the stock worn springs are too weak to handle the cylinder pressure he is making now.

 

i dont doubt that at all, ive seen over 600 as said on race gas or methanol kit on pump gas.

you should ask that guy to spray a 60 hit on top so we can see what happens

 

Well, I for one know that the LS1 is a stout piece, BUT, you are asking for serious problems and it won't just be a new set of pistons most likely or something small like that, you will be replacing the entire engine more than likely. I have pushed Kieth Black hyperutectic pistons to around the HP/TQ figures you people are speaking of without any issues, but you are talking about a STOCK set of "junk" pistons and spindly little rods for over 650 WHP? I assure you, you WILL have a problem it is simply a matter of when, a bad batch of gas, or an overly warm day and a little knock in the motor and it will be gone! There are many things you can do to an LS1 in the bottom end to beef it up for relatively speaking, very little money and then you won't have any problems at all. Check out our site and give us a call, you will be amazed how little it really costs to strengthen this engine a little.

www.race-prep.com
Bryan Wolter RPPE Inc. (Pres.)

 

Potential time bomb.

 

There is no way a stock LS1 shortblock is gonna hold together for any length of time with that kind of setup. Fugedaboutit. Ask yourself how many people are successfully running boost + juice on a stock shortblock of any kind. BTW: "successful" does not mean a couple of dyno runs. Not trying to boast, but I am one of the few people running boost+juice and it is not something you want to subject stock parts to. Sure, you could run low boost and a small nitrous shot, but why bother?

Rich Krause

 

So basically your answer would be: Can you do it? Yes. It would make 600+rwhp. But it is not going to last, a t76 is a decent size tubro. You may want to look into something smaller so you can run small amount of boost when your not beating it. Then turn up the boost and mix up a good tank of gas for some fun. As far as the juice I would stay away if you don't want to rebuild it. That is pretty much asking for it to blow up.

 

http://69.56.235.42/forums/showthrea...ighlight=broke

629rwhp on stock bottom end. 688 broke a piston (nitrous got in the motor instead of just on the aftercooler..pulled 688rwhp at 4k then he got out of it on the dyno because of Detonation)

He expects 650rwhp on stock bottom end.

-Corey

 

A dyno run in a powerful car is just a couple of seconds at WOT. A car that's on the edge on the dyno will be a basket of parts on the track.

Rich Krause