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View Full Version : Dry 3.8 Camaro dyno


srsnow
10-10-2006, 01:08 PM
Thought I would post this for anyone that may have a V6 Camaro or know someone that does.

http://i108.photobucket.com/albums/n22/srsnow/3.jpg

Base Line was 229HP & 223 ft/lbs
Nitrous was 303HP & 346 ft/lb

This was using a Nitrous Supply dry kit using a 40N jet and a 42 bypass jet with 950psi bottle pressure, A/F ratio was around 11.5. We also tested a 36 jet which made 267HP & 285 ft/lb but was running rich at 9.2 and was also only ran to about 5k RPM. All in all I was impressed with the way the car responded to the 40 jet. Most places rate that at between 70-75 flywheel HP and this car picked up 74HP to the wheels.

This particular car had a few mods which may explain why the car responded so well to the nitrous. It had a mild Comp cam, 1.8 rockers, headers and a full exhaust.

This year of Camaro was a little awkward to install the nozzle in seeing as how the MAF is part of the throttle body it self. The nozzle ended up being a little closer to the plenum than I normally like but it seemed to work well. The only issue we had was that because the nozzle had to be placed in the throttle body (which was fairly thin) it had managed to come lose slightly and had turned and ended up facing sideways in the throttle body. This initially caused some strange things with the AFR due to it wanting to stall the air through the MAF and causing the computer to pull pulse width when it first activated. As soon as the nozzle direction was fixed all of those issues went away and the car became very consistent. As a note for anyone that is installing a nozzle directly into th throttle body you may want to use a small amount of lock tight to keep the nozzle from moving.

If anyone has any questions let me know.

Mustang Boy
10-10-2006, 04:00 PM
i dont like the way that torque curve or say drop is u should do somthin to change it



but other than that congradulations

Helmsdini
10-10-2006, 04:16 PM
interesting. that thing would probably scare your typical V8 car.

On the NS dry kits do you guys make your own regulators and stuff, or is it the same NOS stuff?

srsnow
10-10-2006, 06:05 PM
What torque drop? On the baseline pass the slight dip in the upper band was due to valve float, the 1.8 rocker was the cause for that.

It is different in the appearance but functions the same. Right now they are only available in brass, working on getting it made in aluminum.

Mustang Boy
10-10-2006, 08:47 PM
the red line on the top is dropping the entire time

mrr23
10-10-2006, 11:23 PM
pretty good power there.

srsnow
10-11-2006, 12:43 PM
That drop is normal with nitrous. Because nitrous is a constant flow, meaning it doesn't increase with RPM you will not see a rising torque curve like you would with a normaly aspirated engine.

Mustang Boy
10-12-2006, 05:45 PM
o ok i get it forgive me im still new to the whole nitrous thing

Juiced91z
12-30-2006, 08:12 PM
yeppers, its kinda wierd how the HP curve continues to grow but the tq falls off, but thats just how it works, unless you're using multistage set ups

mrr23
12-30-2006, 08:17 PM
nothing wierd about it. hp = tq*rpm. torque goes down because it takes less effort to turn a motor.