Tom400CFI

Nothing earth shattering here, but a "data point" for anyone interested in data points. 155k, stock except for a K&N filter. Notice that I had the pull start way down low so that we could see tq from bottom to top. I wanted to see the pull start at 900 RPM, but the operator had "itchy foot" and hit it at ~12-1500. All three pulls were done right in a row, first pull, the engine was cold (~130*F or so).

As another data point, the car did 277 on a different Dynojet, about 2.5 years ago.








EDIT: '89 L98 graph added on page 2, post #35, for comparison's sake.



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ucfsaxman

Pretty solid numbers It's a manual correct?

Tom400CFI

Sorry, that is right. Manual trans. Good question.

hemivett

Wow, very good numbers! Especially for the miles. Must be well taken care of. h

93Rubie

Look at that torque curve flat as a table top.

shakedown067

My 96 Lt1 just laid down 270hp/296tq, 3" exhaust must have ate my torque. LOL

tombrammer

A/F is 15.5 is that right, seems lean, any comments made about that by your dyno guy? would more fuel help? Those are really good numbers for a 300 hp stock motor.

Tom400CFI

Yep, I was surprised to see how flat it was...300 lbs from ~1700 to ~4700.

Tom400CFI

That was just a default. They didn't use a WB02...even though they said that they would. Otherwise, you're be right...that would be very lean for WOT.

mcm95403

Very interesting results! Kind of makes everyone want to re-think the idea that the short runner intake is giving up a lot of low-end torque.

I'll be very curious to dyno mine and compare the results.

Tom400CFI

Do it! I had a great car-guy day. Got to see cars putting down 105 whp to 1014whp. It was a great way to spend a day.

mcm95403

Last thing I need to do is my AFPR and replace the home-made gaskets for the runners. Once that's done it should be ready for the rollers.

QCVette

That is why I have always liked the LT1's. They pull well at any rpm and it makes for a great street drivable engine.

93 ragtop

not saying this to start a fight, but I would like to see this compared to a stock L98

TorchTarga94

Very nice numbers! Makes me feel good about my 112k mile LT1/ZF6 !

856SPEED

where is aboatguy when you need him?

1993C4LT1

That's pretty good.

93Rubie

Has power everywhere.

vinniemc

Thanks for posting this! I'm impressed, was this on a Mustang dyno?

EDIT: No Vinnie, it was on a Dynojet, pay attention

Aren't dynojets known to read higher than other dynos? I heard they are more consistent however, which is more important. Either way, you give me and my 120k mile LT1 hope

93 ragtop

It seems that there are a lot more dynojets out there then the mustang dynos. FWIW IMO I don't believe they are underrated. Consider the car above was rated at 300 hp and 340 lb torque from factory, and yes its at the flywheel. But in most cases the factory rating is a little under the actual output. They don't get in trouble for underrating, but overrating is another story. Just go ask mazda about their RX8