1992 mustang dyno results - ZR-1 Net Registry Forums

Karl · 07-14-2013

And it put down 342whp and 347wtrq

1992 ZR1 Corvette *St Judes fundraiser 7/14/13* -

The video is also on YouTube under the straightline performance page.

I went to the Straight Line Performance St. Jude's fundraiser dyno day event in New Lenox IL.

This is a stock 1992 ZR1 with a cut open air filter lid and a paper filter.

Car has 67K on the clock.

I have the dyno sheet scanned. If somebody can post it for me that would be great.

There was a 94 LT1 that put down 254 at the wheels, and all stock so the dyno looks to be working correctly.

BTW I was the only 4th gen ZR1 there.

There is no way this car is making 375hp at the crank!

Karl · 07-15-2013

These numbers are SAE measured

Paul Workman · 07-15-2013

The SAE correction factor commonly used for (ZR-1's) drive train loss on a inertia dyno (e.g, dynojet) is rwhp/.85, which would be approx. 342/.85 = 402.35 CHP.

For the LT1, 254/.85 = 298.82 at the clutch, or pretty close to the factory 300 hp spec.

So, what did you expect at the rear wheels for the Z? What mods does it have?

(Getting close to 400 at the wheels isn't much of a trick these days for the LT5.)

Karl · 07-15-2013

I was looking for 320 @ the wheels. Only modification is a cut open air filter lid. It still has the paper air filter that came with the car when I bought it over 2 months ago.

Guess this car is underrated from the factory.

Hog · 07-17-2013

Quote:

Originally Posted by pushrod-v8

I was looking for 320 @ the wheels. Only modification is a cut open air filter lid. It still has the paper air filter that came with the car when I bought it over 2 months ago.

Guess this car is underrated from the factory.

What do you mean under rated? stock the 90-92 IS rated at 375 sae net hp with the 93-95 LT5's being rated at 405 sae hp.

A stock LT1 will output around 250rwhp, and LS1 around 300rwhp.

You underestimate the might LT5.

ZZZZZR1 · 07-17-2013

Those are great rwhp #'s!!!!

Congrats!

David

Karl · 07-17-2013

Quote:

Originally Posted by Hog

What do you mean under rated? stock the 90-92 IS rated at 375 sae net hp with the 93-95 LT5's being rated at 405 sae hp.

A stock LT1 will output around 250rwhp, and LS1 around 300rwhp.

You underestimate the might LT5.

Sae -vs sae net?

CosbySweater · 08-03-2013

Get rid of those nasty stock exhaust manifolds, throw some good headers on it and relocate the IAT and probably bump it up another 20-30whp

07-14-2013	#1
Karl Join Date: May 2013 Location: Chicago Posts: 982	1992 mustang dyno results And it put down 342whp and 347wtrq 1992 ZR1 Corvette St Judes fundraiser 7/14/13 - The video is also on YouTube under the straightline performance page. I went to the Straight Line Performance St. Jude's fundraiser dyno day event in New Lenox IL. This is a stock 1992 ZR1 with a cut open air filter lid and a paper filter. Car has 67K on the clock. I have the dyno sheet scanned. If somebody can post it for me that would be great. There was a 94 LT1 that put down 254 at the wheels, and all stock so the dyno looks to be working correctly. BTW I was the only 4th gen ZR1 there. There is no way this car is making 375hp at the crank! Last edited by Karl; 07-15-2013 at 08:57 AM.

07-15-2013	#2
Karl Join Date: May 2013 Location: Chicago Posts: 982	Re: 1992 mustang dyno results These numbers are SAE measured

07-15-2013	#3
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: 1992 mustang dyno results The SAE correction factor commonly used for (ZR-1's) drive train loss on a inertia dyno (e.g, dynojet) is rwhp/.85, which would be approx. 342/.85 = 402.35 CHP. For the LT1, 254/.85 = 298.82 at the clutch, or pretty close to the factory 300 hp spec. So, what did you expect at the rear wheels for the Z? What mods does it have? (Getting close to 400 at the wheels isn't much of a trick these days for the LT5.)

07-15-2013	#4
Karl Join Date: May 2013 Location: Chicago Posts: 982	Re: 1992 mustang dyno results I was looking for 320 @ the wheels. Only modification is a cut open air filter lid. It still has the paper air filter that came with the car when I bought it over 2 months ago. Guess this car is underrated from the factory.

07-17-2013	#6
ZZZZZR1 Banned BANNED Join Date: Oct 2006 Location: MD Posts: 3,674	Re: 1992 mustang dyno results Those are great rwhp #'s!!!! Congrats! David

08-03-2013	#8
CosbySweater Join Date: May 2013 Location: Nor Cal Posts: 8	Re: 1992 mustang dyno results Get rid of those nasty stock exhaust manifolds, throw some good headers on it and relocate the IAT and probably bump it up another 20-30whp