Some recent dyno graphs

[Aurora40]

Originally Posted by bradslt5

what exhaust did you have behind the headers ? running these cars on ther dyno allways send chills down my back as they sound so sweet at 6-7k . now the 410 gears and the fidanza flywheel .gets one even more fun

Exhaust is stock pipes, LT4 resonator, and Dynomax 3" Ultraflow SS mufflers. I thought it was neat to hear it driving from the outside. A nice sound, not too obnoxious. Too bad it's so resonating on the inside...

Originally Posted by XfireZ51

Too bad you didn't have a WB O2 hooked up. Interesting how the torque peak was extended to ~5500rpm and HP ~ 7000rpm. Anybody know if they'll have a dyno at The Gathering?

There was a wideband hooked up. It just makes the graph look odd. I'll post up a picture with it.

Edit: here's the picture:

[XfireZ51]

Interesting that even with headers WOT is rich. You could get some more hp by bringing the AFR up into the high 12's from what I've been told.

[bradslt5]

wow the afrs are way rich .comared to both my cars .the callaway which i just did which is ported snat 475 . i dont know how agressive it is . but pete (who'd know ) said it was mild .did 372.84 rwhp and 353.64 tq the air fuel started at 12.9 @2500 and went slowly to 12.7 @6600. do you still have the factory injectors ?. or was you knock sensor pulling out timing ? that could be the reason for the spikes .. there is a way to really take a bite out of the resonance .heres what i did i got some sheet aluminium and and made a shield for the mufflers . if you have a fax i could draw what i did . i no longer need advil; for my headache . i know what you mean about hereing her on the dyno . just plain music to my ears . only trouble is ya got the mod bug now . i think petes ported stk blk makes 450 rwhp . thats just about right without having to go nuts money wise .have fun . get some extra toothpaste for this

[ZR1Vette]

Anybody have a dyno run on a total OEM set up ZR? Mine is stock except a Haibeck chip and be curious to compare. I will be taking mine up to Tony's sometime this year to do a run or two...
Michael

[Kevin]

if you have a dyno of your car Michael it'll be close enough to stock. the chip doesn't add that much to the car that it will vastly alter the output

[A1990]

Originally Posted by bradslt5

wow the afrs are way rich .comared to both my cars .the callaway which i just did which is ported snat 475 . i dont know how agressive it is . but pete (who'd know ) said it was mild .did 372.84 rwhp and 353.64 tq the air fuel started at 12.9 @2500 and went slowly to 12.7 @6600. do you still have the factory injectors ?. or was you knock sensor pulling out timing ? that could be the reason for the spikes .. there is a way to really take a bite out of the resonance .heres what i did i got some sheet aluminium and and made a shield for the mufflers . if you have a fax i could draw what i did . i no longer need advil; for my headache . i know what you mean about hereing her on the dyno . just plain music to my ears . only trouble is ya got the mod bug now . i think petes ported stk blk makes 450 rwhp . thats just about right without having to go nuts money wise .have fun . get some extra toothpaste for this

Take a picture and post it.

[Aurora40]

Originally Posted by bradslt5

do you still have the factory injectors ?. or was you knock sensor pulling out timing ? that could be the reason for the spikes ..

The injectors are new Delphi '93+ injectors. Yes some timing was pulled. I mentioned that in my first post. The car seems to carbon up easy, and the first few hard pulls tend to have KR. You can see it in the graph. It was worse in the 1st run. It probably would have been gone if they did a third pull. I see this at the dragstrip too.

Michael, here's one of my car all stock but ported on the top end. I didn't dyno it when it was stock. Phil dyno'd his stocker, though he has a '94.

The bottom line is the just ported one:

http://members.aol.com/corvettezr119...ynocompare.JPG

[karterdon]

Dyno pulls will be avail at BG 8,9 &10 - You need to register. They will also ues a WB 02 sensor - but that is extra.

[XfireZ51]

Originally Posted by karterdon

Dyno pulls will be avail at BG 8,9 &10 - You need to register. They will also ues a WB 02 sensor - but that is extra.

Don,

Hope to have my own WB hooked up by then.