Went to our local dyno day event and decided to see what a little extra boost (12.5lbs) with the precision turbo would do. My TC76 made 580 rwhp on 7lbs so I about **** my pants when the guys told me it made over 700. Almost everyone was wondering what just happened. It was a dyno shoot out event and I won the Highest Turbo car trophy, another guy with a twin turbo 470 BB put down 900 rwhp but he was under boost + nitrous class. This was through my SLP Dual Dual!! It made 729 through the cutout but ran out of fuel pump on 5 degrees of timing.

130k stock bottom end LS1
11:1 compression milled / valve job 243's, BRE 224 cam, self ported fast 85
NGK BR7EF plugs gapped at .028"
Single walbro with 60lb injectors
AlkyControl 15gph nozzle meth kit, 100% meth
KYTP TC76 truck manifold kit with Precision 76GTS on 12.5lbs
MWC 9" with 3.5 gears and 21lb driveshaft
26x11.5-15 M&H Slicks
T56 with Mcleod twin disc RXT clutch (badass)
SLP dual dual exhaust with 4" DMH cutout

Tach signal appears to be off and rpm's are not correct. Made peak hp 717 @ 6100 and peak tq 720 @ 4700. See post # 14 for more info.


Trophy I won



http://www.youtube.com/watch?v=_Ce_MEJ-j5o

 

How long do you expect that stock ls1 shortblock to last at that power level?

 

Great numbers, Chris Stewart in Puyallup raced his TTI Z06 for a couple of seasons on a completely stock motor making 700rwhp. He was living on borrowed time.

 

They only pulled it to 5500 rpm? I've been looking at replacing my master power with this turbo. That's insane with only 5 degrees of timing! Time for a second walbro and more timing:p

 

The run that made 717 was with 13-15 degrees of timing through the muffler and 12.5lbs @ peak torque / 11.5 @ peak hp. With the cutout open it made729 but only 5 degrees of timing with 15lbs of boost. I actually pulled it to 6400 rpm but I don't know what happened, maybe stopped recording? It's on borrowed time and is getting the 7.5lb wastegate spring put back in asap lol.

 

holy **** thats alot of power

 

Sick!

 

Holy Hell. Yea Bragging rights

 

Nice work! congrats!

 

What heads do you have to put you at 11:1?

 

Bad *** man! lol

 

I believe he has some nicely ported 243's.

 

Nitroused when you texted me saying it made 720 I nearly **** my pants lol.

I wonder what mine is making at 15psi and 16* timing on 110/93/meth

All I know is with me rolling out the beams, and flooring it 100' out, it trapped 112mph. I'm guessing if I'd of launched it off the t brake it would of trapped 115 at least or more. I just wanted to see if the track would hold at 15psi first. Then I started to have ignition/fuel problems.

I did back it down to 12-13psi for pump and 14* timing.

 

Thanks alot guys and I was really expecting 640-650 rwhp. I think the 800 ft lbs is not accurate as the graph appears to be shifted over 1000 rpm. No way was I making 400 ftlbs at 2500 rpm with .2lbs of boost, it made 4lbs at 3000 and 12 lbs at 3800. From looking at the graph in mph I pulled up to 140mph which is 6250. Peak looks to be at 6100.

The hp calcuations are correct based off mph and acceleration rate of the rollers. So by using some online calculators to come up with torque base off rpm and hp here are rough torque numbers. They were having issues with the tach signal so they marked a pulley and put a piece of tape on it using a known diameter and had some sort of timing light on it to roughly calculate rpm.

Looks like 717 hp @ 6100
Peak torque is 720 @ 4700

3000 = 381 ftlbs
3500 = 532
4000 = 667
4500 = 708
5000 = 688
5500 = 657
6000 = 628

 

So, just a cage this winter then?

 

Holy crap you think you could go 115? That's a lot of power out of a stock bottom end especially at your weight. Mines just a dyno queen it won't come close to that in the 1/8th, damn turbo's and 6 speeds! I don't know if I will cage it or not but I'm putting the 7.5lb spring back in the wastegate so it's a little more sane on the street.

 

It went 112 rolling out the gate and not laying the wood to it till 60-100' out.

 

Awesome numbers for that setup! Really makes me want to go buy the PT76 right now lol. I know that my TC78 isn't going to do that.

 

Congrats! Very inspiring.

 

Congrats ! very nice numbers . Should be alot of fun