I think that might be a little low but its right.... I had 2:8,60#,airbox mod,h/e and slp catback with stock header/dp and I put down 223 with a base tune.

 

sounds like a lot of you a pulling low numbers. Makes me wonder if zzp's dyno read high the day i did it. It was like 90 degrees out, and i pulled 251 on my third pull.

 

@ G11: That dyno/shop sounds like it is run by used car salesmen, lol. Half 91 and half e85? Please tell me youre kidding.

@ 55supercharged: 223 is nowhere close to right for a 2.8 w/ 60s. If you want to get some more realistic numbers keep an eye out for the next FWDPerformance dyno day. Their dynocom puts down the most accurate numbers I've seen in town.

 

To the guys with the low dyno pulls. If you have an Interceptor or HP Tuners do a run logging mass air flow (lbs/min) & rpm (just to see where your peak power is). You can then take your reading, and divide your mass air flow output by 0.108 lbs/min (0.108 lbs/min = approx. 1 bhp). Once you get your brake horsepower reading take about 12% (avg. percent driveline loss for cobalts), and you will get an idea of what your actual whp is.

Dynos vary so much, and get so many people upset when they produce low numbers. At least with this calculation you can get an idea of where your car is power wise, and can at least compare it when you try out a different dyno.

Ex. 30.23 lbs/min / 0.108 lbs/min = 279.91 BHP * 0.88 = 246.32 WHP.

 

Well is was on a base tune.very safe. The dyno was a dynojet with about 65% humidity. It was also reading low as there was a vette there who had dynod before a couple weeks ago and andded goodies but made less.

To many factors come into play

 

sorry to say no im not kidding... could there be any problems with that? going lean maybe? i haven't had any codes or anything on my car. I feel for some reason like it makes my car better than with just 91 in it

 

This thread makes me not want to dyno my car haha, I think I already have too high of hopes with the mods I have

 

Modify you car logically, have a good tuner, and make sure your car is running mechanically sound and you have nothing to worry about