ok, the car was tuned 2 weeks about by FLP on their Dyno Jet. it made 326 hp and 342 tq.

then on Outlaw Motorsports Mustang dyno, it made 318, then 388 with a 125 wet shot, which he calculated to be about 426 RWHP (he added 10%, ive been reading the difference is between 10 and 15 %). that sound about right? its a Nitrous Works wet plate system. was about 960 PSI in the bottle when spraying.

the car has an N/A tune by Dan Bills from FLP, Outlaw will be e-mailing me the dyno graphs soon and i will post them.

 

sounds low for a 125 wet shot. Are those kits rated at the wheels? Even if its the crank, it should still give you a 100rwhp kick. Sure the 75 jets weren't in it? What were your rwtq readings? A/F?

-Brian

 

im not sure, he said the numbers and that was it, ill be receiving the graphs in a few days. the way im looking at it, when the car was tuned on the dynojet, it put 326, so after 10% addition to compare to a dynojet again instaed of a mustang dyno, it did 426, which would be 100 hp. it was also hot and on a portable dyno in a parking lot.

 

Just for comparison, I have almost the same set up as you w/an auto, 3200 stall, cc305, PCM 4 less tune and 100 shot and I got 330 rwhp w/o the nitrous and 441 with the nitrous. The other mods are in the sig. Remember, it is pretty hot out now and that may make a difference in your numbers.

 

Check your systems requirements, but most kits rate thier power at 1050psi. The difference between the last 100psi can be substantial.

 

I have a 93 Lt1 6speed 289 rwhp and 318 rwtq with a 100 shot HSW system i made 392 rwhp and 434 rwtq done in 5th gear. Soon i will be goin to 150 shot.

 

If he added 10% to the rear wheel HP to get 426 flywheel HP (not "RWHP" as you indicate), he's too far off. Typical losses for your M6 drivetrain are in the 12.5-13.0% range. That would mean divide by 0.87 (or multiply by 1.15)to get flywheel:

388 / 0.87 = 446 flywheel.

388 X 1.15 = 446 flywheel

But all of that is not very important. Getting 70HP gain at the rear wheels with a 100-shot seems weak. 70 / 0.87 = 80 flywheel HP

The difference in nitrous flow between 1050 and 950 psi is less than 5%, so that doesn't explain the weak performance either.

What was the A/F ratio on the NA pull? ..... on the N2O pull? Did you check the plugs after the N2O pull to see if you are getting even distribution of nitrous to all cylinders, and whether there's any evidence of an excessively rich or lean mixture?

 

I have personally found that the last 1-200psi can be as much as 3 thenths and 3-4 mph on my car. When testing my n20 system/suspension I run 8-900 psi. When I crank the psi up to 1050, I trap 3-4 better on a 100 shot. Much of this has to do with the car running extremely rich with such low bottle pressure though.

 

The difference between 1050 and 800psi is almost 15%.... that's a significant change. The nitrous solenoid is nothing more than an orifice, and you can calculate the flows with the orifice equation.