92 ZR-1 on the dyno Today

[Subfixer]

All stock except Mark's chip.


326hp @ 5700, 322tq @ 4700.


Fell off to 305hp, 210tq @ 7000.



Using 15% loss as a guide, puts the engine power just about 385hp.

Not bad for a 27 year old, 20k mile car.

[Mystic ZR-1]

Where’d ya find a dyno around here?

[ghlkal]

Nice numbers.


Mustang dyno?





Here was my dyno before mods http://www.zr1.net/forum/showthread.php?t=20788&highlight=dyno

[Subfixer]

Where’d ya find a dyno around here?



South Windsor.
The Posse goes every April.


Nice numbers.
Mustang dyno?
Here was my dyno before mods http://www.zr1.net/forum/showthread.php?t=20788&highlight=dyno

Dynojet Research


Your numbers are really close to mine.

[efnfast]

Sumpins' up. HP should climb right to 7K.
At 5700 rpm, I was about 420, at 7K I was about 450.

[tiegsd]

All stock except Mark's chip.


326hp @ 5700, 322tq @ 4700.


Fell off to 305hp, 210tq @ 7000.



Using 15% loss as a guide, puts the engine power just about 385hp.

Not bad for a 27 year old, 20k mile car.


Nice. I think the 90-92 LT5s were originally 375HP at 6000 rpm (nominally about 318HP after 15% driveline loss) and 370 lb-ft at 4800 rpm (about 314 lb-ft after loss factor).

Looks like the chip does what it is advertised to do as far as power and torque upgrade, which I'm happy to see since I too have stock LT-5 except Haibeck chip.

Thanks for the share! :dancing

[32valvZ]

So I have long tubes, the SW 3" exhaust and Marcs chip plus I just got it back from him for the header provision... He says +25 hp so thats crank hp, correct? I wonder what my engine would be at.... :o

[Paul Workman]

Sumpins' up. HP should climb right to 7K.
At 5700 rpm, I was about 420, at 7K I was about 450.

Stock vs cammed or ?

An (below) actual stock (Dynojet) LT5 (1990-92, IIRC) for comparison.

=334 HP at the wheels @ 5700, ~330 torque @ ~4500 RPM

The dyno operator cut it off early ~6400 RPM, but it looks that SUBFIXER's #s are about normal for a stock LT5. Looks about right to me, no?

[efnfast]

My hp always climbs right to red line, doesn't fall off like that.
Yes it's cammed, but did it before also.
Looks like I got the only good one.
Maybe I'll bring my sheets to BG, make sure I'm reading them right. (It's only two lines).
But, I'm not very goodly edumacated.

[Subfixer]

Here's my dyno plot.
Runfile_001 was a short first pull.
Runfile_002 was the first full pull.
Runfile_003 was the second full pull with the best numbers.