Actually, an LT1 that was originally trappping 105-106mph with bolt-ons (stock heads/stock cam, stock motor) then traps 130mph with PTK and 10-12psi ( I dont remember which psi it was). Thats ~25mph pickup (which is close to 250rwhp gain).

Back to this thread, I guess the numbers this truck put out were on a superflow dyno, which reads a good amount higher than dynojets (~10% more).

As far as STS kits, anyone see the black GTO running 10.6's on low boost in the FI section on ls1tech?

 

Realquick, you are correct, the car went from 275rwhp to 528rwhp with 10psi. Nothing unbelievable about that. 20-25hp per lb of boost is normal on a street system. A full blown race system with thumpers see about 35-40, since they are closer to 1:1, street systems are typically seeing 2:1 PR's. But by this thread, the car should have gone from 275rwhp to 795rwhp...lol.

 

As for the GTO, well, with forged pistons, turbo cam, ported heads, and TC, using meth and 10psi, I would hope 10.6's@129 would be doable.

Jose

 

It just goes to show you that STS kits can be quick, despite what people think. If he ups that to 15psi, he should see high 9's @ 135mph easy. Not bad for a bloated car, with a small turbo, let alone rearmount.

 

jose what kind of times is YOUR camaro running what dyno numbers did it make again?

 

Haven't done anything with mine yet. To busy helping everyone else get their setups running...lol. Plus if I posted mine, more then likely still no one would give it credit. Probably say since I own it and market it, the results can't possibly be the truth...lol.

Jose

 

NOt true. Just post a dyno curve so we can see the shape of the curve. The point here is people shouldnt hype up a kit and say its the best on a particular site if there isnt atleast evidence so the people on the site can view it. If you say you dynoed 800rwhp, then i'd believe you, but i wanna see where peak boost is, where power falls off, etc.

 

correct me if I am wrong but didn't you start your turbo project in like the spring of 03? and its still "comming soon" put that car together take some pic make some dyno pulls get some track times. if you make power and run great times it's only going help you sell product. as opposed to bad mouthing a kit that i has made the hardest step of being up and running.

 

I will post results of my setup. But to the point of this thread...

I do believe the 6L engine was first available in 1999/2000 in the Silverado. Rated 300hp. If this is a 1994 then he either has the 5L (175hp) or the 5.7L(200hp) or the 7.4L (230hp)... Unless he swapped the 6L engine, ECU, wiring etc in, which makes no sense at all, but lets add it in the calcs. Now... lets look at all the possibilities here.

669rwhp is about 790hp flywheel...

If he has the 5L, he gained 615hp at 9.5psi = 64.7hp/psi
If he has the 5.7L, he gained 590hp = 62.1hp/psi
If he has the 7.4L big block, +560hp = 59.0hp/psi
If he has the 6L LS engine +490hp = 51.6hp/psi.

Now lets knock all those numbers down 10% for the dyno and recalculate...

5L (710hp corrected)(175hp stock)= +535hp =56.3hp/psi
5.7L (710hp corrected)(200hp stock)= +510hp =53.7hp/psi
7.4L (710hp corrected)(230hp stock)= +480hp =50.5hp/psi
6L (710hp corrected)(300hp stock)= +410hp =43.2hp/psi

Now for amusement, I'll compare this to 5-liter-eater's 5.7L built motor. It's fully built sure. But lets say it was rated 400hp before the turbo. Considering he wasnt stock I'll say thats fair. He pulled 634rwhp which is roughly 750hp@10psi.

5.7L built motor (750hp)(400hp motor) = +350hp@10psi = 35hp/psi

That I will believe from a built motor. Hands down. However, corrected for the 10% numers, there is no way a stock engine from the 1994 could produce those numbers, not even a big block 454. I dont see that as ever possible. However, if he dropped in a 6L engine from a 2000+ truck that still means his engine gained far more hp/psi then 5-liter-eater's car. His engine was built for boost. This engine is supposedly stock. I dont believe this at all.

5-liter-eater's car is very impressive for a rear mount, and I use his car and the GTO as the benchmark for all other rear mount setups. Both have seen a lot of hard work, and both are proven. This truck gains more power per/psi then either built engine. Thats just not possible. I dont care how you slice it. I believe 5-liter-eaters car, of F8L Z71's truck. But... not this.

Sorry guys, I cant swallow that he has a 94 and swapped the engine and control systems and then did a rear mount. And even if he did, thats still more hp/psi then a purpose built turbo motor vs a stock motor. Not going to believe it at all.

 

also, for grins, on the same "best case" 6L 300hp engine---

410rwhp = 480flywheel.

480flywheel vs 300hp stock = 180hp gained at 5psi = 36hp/psi.

The 36psi I dont even believe. Oh, forgot. Correct those numbers down 10%.

Okay, now corrected 435hp flyhweel.

435 (300stock) = 27hp/psi.

27hp/psi I can BARELY believe for a stock 6L engine in a 2000 Silverado. STOCK engine.

Wait.

How does one add boost to an engine (increasing flow losses and friction) and actually gain efficiency (shown in the hp/psi) now... the math doesnt lie. Those gains arent linear. Thats an expoential.... Physics say its not possible. But (for grins) he gains 27hp/psi@5psi, and 43hp/psi@10psi.... then at 15psi he would gain about 69hp/psi - which means he'd pull 1136rwhp@15psi!!!!!!!!!!!!!!!

The 5psi dyno I might believe. However... The 10psi I dont.

 

Geoff, same reason why I said it unbelieveable. But I get tired of trying to explain why...lol. Like I said even our pro cars don't gain that much at the wheels per 1 psi of boost. Oh well, my customers that do have STS systems don't even believe it...lol.

Jose

 

Oh... and a 1994 Silverado regular cab short bed weighs 3717lb. Plus 30lb of turbo and such and a 200lb driver, we're talking 3950lb.

Calculating HP from ET for that weight means he needs 463rwhp@5psi. He only had 410rwhp. Makes no sense.

Calculating HP from Trap, means 410rwhp or 484 flywheel. THAT makes sense!

Well, lets take that 410hp and calculate ET from horsepower and do it the other way... 3950lb vehicle with 410rwhp means an ET of 12.39hp... WTF?

No matter how you calculate this - it makes NO sense.

 

Our customers car with the built 355 turbo motor and T88 went from 344rwhp to 1012rwhp with 24psi. You do the math . And remember a T88 is a large turbo which will have a better efficiency due to less backpressure.

 

By the way, I believe 5litereater finished up at 700rwhp @ 10psi...

Thats what a little bird said...

 

Sounds like Purevl's car....maybe not. His made 634rwhp with 10psi. I believe he was going to push to 14psi and re-dyno. If he hit 700rwhp, then thats pretty good. I have an STS customer that made 777rwhp.

Jose