Ok. been watching videos and looking around the net and all im seeing is these Supras making 1100, 1250,1300,1500 hp and at most they have little 3.4 litters at the most with like 42 psi . what the heck. if this kind of power is possible on these motors shouldn't any LSX, Ford Modular, or Chrystler Hemi blister these little things power wise. Whats so special about them? How are they able to make this kind of power.

 

an LSX can make that kinda power too.

difference is, 1500+HP in supra = 12's

1500+HP LSX = THIS

 

true dat!

The avarage hp and torque is there on the lsx motor vs. the i6.

 

Thanks. just been down about a 1000hp 3.0. you have to admit that is amazing

 

Like you said in your earlier in your 1st statement, it takes 40-50 pounds of boost to make that kind of power out of a 3.0. I'm not saying it's not EXTREMELY impressive, I'm just saying it takes less boost to make the same power from more CIs.

 

Yes the bigger the engine the better. Look at the Vipers....making 1000rwhp with 9psi......sickening feeling indeed.

 

Every 15 psi of boost doubles the power that the engine was putting out. So a small import engine making 200rwhp will make 400rwhp at 15psi.... etc.

That's why build race LS1 engines will make huge power at 2 bar (15psi).

 

You need to remember, boost is a measure of resistance. So really 42 psi means that it is harder to shove air in there. You will probably never see an LSx at 42 psi, because it eats so much more air (being 5.7l vs 3.0l). Thats why if you get better flowing anything on your engine, you will drop boost.

And you also have to take into consideration the usable power curve. Supra's make a very high #, but they only have 800+hp for maybe 1k rpm, if they are lucky. LSx's have a broad powerband, not a mountain like one but more like a small hill.

 

I dont think its any secret any more that any motor can make a lot of power when you force air and fuel into its throat. (not to take anything away from the small engine making big HP. )

 

Any engine will make only as much power as the Turbo will allow. Supra's make that much power with over 40lbs of boost where as LS1 motors make the same HP with only 20lbs.

 

isnt 2 bar 29.4ps1?

 

No, you have to remember that for a MAP sensor the first bar has to read vacuum to 0 on a boost gauge, from there a 2 bar MAP will read vacuum to about 15 PSI on a boost gauge. A boost gauge at "0" vacuum is actually atmospheric pressure to a MAP or around 14.7 PSI (depending on how far you are from sea level).

I think the amazing thing is with Supra's is they can make that kind of power with a stock engine. I don't think the power is as amazing as the reliability. My Dad has a pretty rare Supra, it's a '94 Black 6-speed Hardtop car, not very many of those were made, but with what is done to it, it lays down some pretty impressive numbers. But like I said what is more impressive to me is the fact it gets driven, and gets the crap beat out of it coming up on 100K miles! Toyota's seem to take the abuse as compared to most other vehicles, we make turbo kits for the 22RE engine (2.4L) which came in thousands of trucks and Celica's. After joining some Toyota forums many guys that had talked of this and said it's not worth it just drop in a Chevy 350, blah, blah, the 22RE won't handle 5 PSI it'll blow up......well our test beater 4x4 truck with a 100% stock never opened engine now has 144K miles on it and has been turbo'ed and beat to death with many different tests, turbos, headers and such since 117K miles. The truck made 96.8 horse stock, the last dyno run at 10 PSI non-intercooled layed down 162 horse, it has been run with an intercooler and 17 PSI for past few weeks and we are awaiting another trip to the Mustang dyno to see what it does. Considering your average run of the mill 350 chevy motor is lucky to make 200 horse, the turbo option is cheaper, easier, and quite cool sounding!

Later

 

the supra unit is simly amazing! im starting to think its better than the Skyline plan! and thats saying something!! i think its all in the engiering that goes into these engines. the blocks are massivvely over done as they where duilt for racing!

the down uside is i dont think we are going to see many more engines like that! Nissan's new V6 (in the 250z) isn't that great and people are having problems getting massive power out of them.

soooo it looks like the LS engiens will just have to step up!

thanks Chris.

 

The last Supra I saw ran 9's, don't know the HP.

 

Hmmm, the last Supra I was standing next to on the dyno hit about 792 horse, and ran 9.80's, with a stock engine minus HKS cams......and it is a 6-speed car. So if you got 1500 horse and can't get out of the 12's, you need to sell your car, you weren't meant to be a drag racer......

Later

 

thread I made a while back https://ls1tech.com/forums/forced-induction/570001-31-psi-video.html

 

Hey guys i was just poking around here. I drive a srt-4 so im from a different world. What you guys need to understand is that although supra's and other f/i cars make 1300 peak hp. A turbo needs to spool. Spooling takes time making cars with big peak hp slower then you would expect. Thats why 1200whp supras arent as fast as you would expect. Another reason why supras make so much hp is because you can turn up the boost easily because the engines are designed to be boosted(low compression etc)

Esentially those giant whp supras are just dynoqueens.

As an example i know someone with an 800hp lexus is300. Its a sick car but takes till third gear to spool up and really make power.

 

Another example is a local srt making nearly 600whp thats best time is a 10.7. You would think 600whp in a 2900lb on slicks (even though its fwd) would be crazy. But that little 2.4 spooling that big turbo takes some time.

 

Well, it effectively doubles the displacement, is that basically true with power too?

 

For the record, I had a Supra (94 w/ auto) and at 702 hp it ran 10.90's on Nittos with some spin.

Put 700 in a f-body with solid axel and a good converter and your probably a bit faster due to power under the curve.