Stock long block LS2 does over 730rwhp!!!!!!!!!

Whatcha think?

Superdave's GTO. Bone stock long block right to the valve springs.

Bullseye S374 turbo w/ race cover and 1.1AR.

Pull was at 15psi with a very soft tune.

735rwhp@5400rpm

745rwtq@4900rpm

Forced induction section has details of the build "another dop turbo setup".

Nice, but it will not hold-up with 15 pounds of boost.

whats the limiter at? Why not atleast do springs and pushrods...that thing wont last.
Nice dyno sheet, be sure to frame it when your spending 9k on a shortblock shortly.

Quote: Originally Posted by Jontall... Nice, but it will not hold-up with 15 pounds of boost.

Quote: Originally Posted by BUCKNERBUCK2... whats the limiter at? Why not atleast do springs and pushrods...that thing wont last. Nice dyno sheet, be sure to frame it when your spending 9k on a shortblock shortly.

lolz so true. Nice numbers though.

You think we are a bunch of morons here??? You think we do not know that. We did just make over 700whp with a setup we built in house from start to finish. We didn't buy a APS kit and pay someone to tune it.

It does not experience any valve float as of now. Valve train couldn't be any happier. We made 9 back to back runs. Beat it up on the street and race it. Dave shifts at 5900-6000rpm. 15psi doesn't mean squat its just a number representing manifold restriction. This care has a stock cam and heads remember. Its not 15 psi with after market heads and cam that flow good numbers. Also its not 15psi with a lot of timing and a mean AFR. The tune is SOFT!!!!! Yes we know its on borrowed time. How borrowed??? You will be surprised and will continue to be for sure. People have done 700 plus with prochargers and thats runin off the crank kids.

Thanks for the comps it has been a fun season.

BTW Dave will be building a forged motor. Hes not tight on money and has had much faster cars he is by no means "NEW". hahahahaha!

Impressive #s but he may get some valve float in the higher RPMs and, like said before, the bottom end is not going to like that for too long. Have them tune it for 600-625 and it be be fast and reliable, unless he doesn't care about reliability and will build it if it blows up anyways.

How many have you blown up at this power level???? I think it will stay together a lot longer than most ppl think. Its safe and only spinning to stock RPM, with a stock cam and stock heads. I don't see what the problem is here...

Like Vin Diesel says in 'The Fast and the Furious'..."now me and the mad scientist have to rip apart the block, and replace the rings you just fried"

All this while staying consevative at 15 degrees of timing and 11.0 AFRs


Booyah.....

Reliability is not much of a issue here we are having fun. All though the motor is just as happy as can be right now and purrin like a little kittin. We will be the testbed for 700whp reliability.

You'll be setting a precedent if she holds together for a while. I'm rooting for ya. Awesome numbers.

I am also impressed. First time I've seen a LS-x based motor that makes that kind of power at a streetable level..

Turbo's are quite gentle on parts fellas. The LS-x motors won't experience a whole lot of cap walk due to the 6 bolt mains, so the engine with some upgraded pushrods, lifters, and springs should last quite some time.

Quote: Originally Posted by hellbents10... You think we are a bunch of morons here??? You think we do not know that. We did just make over 700whp with a setup we built in house from start to finish. We didn't buy a APS kit and pay someone to tune it. It does not experience any valve float as of now. Valve train couldn't be any happier. We made 9 back to back runs. Beat it up on the street and race it. Dave shifts at 5900-6000rpm. 15psi doesn't mean squat its just a number representing manifold restriction. This care has a stock cam and heads remember. Its not 15 psi with after market heads and cam that flow good numbers. Also its not 15psi with a lot of timing and a mean AFR. The tune is SOFT!!!!! Yes we know its on borrowed time. How borrowed??? You will be surprised and will continue to be for sure. People have done 700 plus with prochargers and thats runin off the crank kids. Thanks for the comps it has been a fun season. BTW Dave will be building a forged motor. Hes not tight on money and has had much faster cars he is by no means "NEW". hahahahaha!

Very impressive and great job and I agree with you 100% it will live as long as it never goes to lean or has a little to much KR. I am sure you are reffering to me running ported lower compressio heads and a cam and thats fine. I did what I did so that I would not have to detune the hell out of it and actually make power I could use on the street. These LS motors are very strong and I dont think 730 is asking to much of it but we all know a 9.8 to 1 stock bottom end with 15psi of boost with freeflowing heads has a better chance of living than 11.0 to 1 with 15psi and somewhat restrictive heads not allowing the combustion chambers to rid themselfs of hot gases.

There are a lot of guys making big power with stock shortblocks but as you already know and have stated if it goes it goes until then just enjoy it. I have stated numerous times you cant put a # on at what power level the engine will blow.

Just curious are you spraying meth into it as well?

Les

One last thing I think every boosted LS motor that I have heard of blowing can be traced to either lack of fuel, poor tuning or some other gremlin never actually heard of a case of well I made so much power the block split or the rods snapped in half.

Yes we are spraying meth. As you know and not many others it seems, the motor did not suffer from catastrophic failure at this power level. So it will make it for a while. Defiantly not 100k but who knows really? It could live for 15-20k at this level.

If this motor sees any knock it will be an instant game over. 500whp on a stock motor will allow for error. 800rwhp on a forged bottom will allow for error. 700+ on a stock bottom end with a little blip of something bad.....well you know..."The deification will hit the rotary oscillator".

This is one of the reasons we (Dave esp.) opted for a a1000 pump and not a in-tank 255 with a boost a pump and what not. Reliability in the fuel system is a must for this power level.

TJ,

Thanks for the Kudo's

I think we have a lot of room left in our fuel system to make more power with our 50lb injectors since we are only at 58PSI.

Yessir, more meth and 70psi or so base pressure on the injectors and we should be good for 1k to the tires.

Hay, you think we could do it on a stock bottom end???? lol.

You sir are sik in the head, nuf said....

my ls1 made it 6 months of beating the shit out of it everyday at 625/736 RW with T.T.'s and before that it had a maggie on her. so they are strong little buggers thats for sure. i ran mine at 11.6 afr and 18* timming with meth and stock everything except cam. i will bet that a rod will give first, thats what mine did... have fun though!!!

I agree with you firefly9r68. With the low timing we are running, rich afr, and good fuel my bets would be on the rod. All though we keep the r's below 6k. I would like to try for 800 on the bottom but that would be a death mission and we would need valve springs for more power.

800HP on the dyno would be really cool, but if we are going to blow it up maxing out this stock LS2 motor
I would rather max it out bit by bit at to make a fast ET MPH actually driving the car.

Couldn't agree more Dave. Running 140+ with the stock motor would be way cooler then any dyno number!!!! I almost forgot that its not a Supra...

I think with the RPMs staying around or under 6k the motor will last a little longer than most people are anticipating!

Quote: Originally Posted by PB_Max... How many have you blown up at this power level???? I think it will stay together a lot longer than most ppl think. Its safe and only spinning to stock RPM, with a stock cam and stock heads. I don't see what the problem is here...

Rod bolts

Scary stuff, but looks like a lot of fun. I'm running 9psi on the factory setup now. I feel like every race could be my last, but man it is a hell of a ride.


What are your plans once she blows? I've already started looking at iron blocks just in case.

any vids? i hope it last awhile.

http://videos.streetfire.net/video/d...ec00a450a2.htm

http://videos.streetfire.net/video/e...ec0122cbe7.htm

Dave has plans of a 6l iron block. We will ride this out for as long as it lasts. LSX has been said and tossed around. Allthough we deamed it unessisary cause the car will more then likely never see more then 1100 to the tires.

It seems to me that the block isn't the problem... Everyone who's posted seems to indicate that the rods are the weak link..

I'm not really aware of the LS2 blocks being any weaker than the LQ-x's..

Be sure to post up when the ring lands and / or rod bolts take a vacation.

Run the hell out if it, and when it breaks oh well, even non- modified cars break, here we all are addind go fast goodies then getting worried about something breaking, im thinking if they was worried about breaking somthing they wouldnt added the power.