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Stock LT1 Dyno results....

 
Old 04-14-2013, 07:57 PM
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Tom400CFI
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Default Stock LT1 Dyno results....

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.



.

Last edited by Tom400CFI; 07-08-2019 at 11:58 AM.
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Old 04-14-2013, 08:01 PM
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ucfsaxman
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Pretty solid numbers It's a manual correct?
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Old 04-14-2013, 08:02 PM
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Sorry, that is right. Manual trans. Good question.
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Old 04-14-2013, 08:08 PM
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hemivett
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Wow, very good numbers! Especially for the miles. Must be well taken care of. h
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Old 04-14-2013, 08:58 PM
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93Rubie
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Look at that torque curve flat as a table top.
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Old 04-14-2013, 09:47 PM
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My 96 Lt1 just laid down 270hp/296tq, 3" exhaust must have ate my torque. LOL
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Old 04-14-2013, 10:40 PM
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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.
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Old 04-15-2013, 12:13 AM
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Originally Posted by 93Rubie View Post
Look at that torque curve flat as a table top.
Yep, I was surprised to see how flat it was...300 lbs from ~1700 to ~4700.
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Old 04-15-2013, 12:14 AM
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Originally Posted by tombrammer View Post
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.
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.
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Old 04-15-2013, 12:22 AM
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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.
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Old 04-15-2013, 12:26 AM
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Originally Posted by mcm95403 View Post
I'll be very curious to dyno mine and compare the results.
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.
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Old 04-15-2013, 02:36 AM
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Originally Posted by Tom400CFI View Post
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.
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.
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Old 04-15-2013, 11:17 AM
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QCVette
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Originally Posted by 93Rubie View Post
Look at that torque curve flat as a table top.

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.
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Old 04-15-2013, 12:31 PM
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93 ragtop
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not saying this to start a fight, but I would like to see this compared to a stock L98
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Old 04-15-2013, 12:47 PM
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Very nice numbers! Makes me feel good about my 112k mile LT1/ZF6 !
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Old 04-15-2013, 03:48 PM
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Originally Posted by 93 ragtop View Post
not saying this to start a fight, but I would like to see this compared to a stock L98
where is aboatguy when you need him?
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Old 04-15-2013, 11:01 PM
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That's pretty good.
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Old 04-17-2013, 11:03 PM
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Originally Posted by QCVette View Post

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.
Has power everywhere.
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Old 04-17-2013, 11:25 PM
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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

Last edited by vinniemc; 04-17-2013 at 11:27 PM.
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Old 04-18-2013, 07:44 AM
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Originally Posted by vinniemc View Post
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


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
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