Had my car up on the dyno on saturday, its a 2007 ss/sc with an intake and megan racing catback, im rather disappointed with my numbers, my best pull was 176.99whp and 160wtq, but, the dyno was outside, and it was really hot and humid, plus the car heatedht up on the dyno, so tell me, do those numbers sound about right? ill take a pic of the dyno sheet and the specs tonight

 

u prolly had heatsoak like a mother****** and no cooling mods to help thats y ur numbers suck....get sum cooling mods and go on a cooler day

 

seems a bit off. Was your IC pump working?

My LSJ with just a ZZP intake dynoed 237 whp and 213 tq. and that was at 5200+ altitude. however it was a cold November day.

 

you realize its just a ruler right? its a way to measure not a total end all for performance. did you dyno before you modded and how does your car react at the track? what the ruler says your car makes doesnt mean **** if you still run the same track times as guys on here with your mods .

 

def. something wrong. my lsj with only a zzp 2.5 catless dp dyno'd 232whp and 195 tq

 

don't get hung up on dyno numbers. when I had the Cobalt, I dyno'ed with GMS1 and intake in november (cool weather) and put down 220 hp and the guy at the dyno and a few others said something must be wrong but I kept getting told not to get hung up on the dyno numbers. I was disappointed until I went to the strip and trapped just under 107 mph on a slow strip with the t/c on bogging the car down half of 1st and 2nd (forgot to turn it off lol).

check your trims tho because if the intake is throwing them off, it might be robbing you of power. if everything seems to be working properly, good trims and you have no codes, then you're probably fine. just wait until you go to the strip and the numbers there will tell you a much better story.

 

I think the biggest culprit was heat soak, it was 30*C out with very high humidity, and i thonk my fuel trims may be off, i just need someone local with hpt to do some tweeking

and im not so much hung up on the numbers, im just disapointed, just means i gotta spend some more money towards the engine lol :p

 

do you have any cooling mods?

 

yes dynos are only really good form relative power measurements and tho they very its normally not by that much. Bone stock most SS/SC break 200hp. Sounds something may be wrong with the car or the dyno wasn't set up right.


my cobalt did 230hp with I/H/E , GM stage 2, 2.8 pulley and aux HE turns out my SC pump was dead.

 

check ur ic pump

 

Im going to, it was working last time i checked, which wasnt that long ago

 

i'd say big heatsoak issue. i run shitty track times when i drive to the track on a hot humid night and couldn't get under 14.6 on a stage 2 setup! i was hooking and going too!

so yea u need cooling mods ( i do too hence bad track times)

 

I just realized u have an intake off ebay, that is prolly some of ur problem right there take that trash off put back on the stock box and do the box mod or get a zzp intake.

 

wow u people really getting 230whp just from a downpipe or intake on a stock motor? sounds like a happy dyno to me. Thought these cars were more like 230-240hp at the crank.

 

Aside from the fact that there are 3 majorly used dynos out there. The Mustang, Dynojet, & Dyno Dynamic all read differently from one another by a rather large percentage due to many different variables.

No one dyno reads the same; this being said... it's nothing more than a tuning tool to measure gains as you modify your car, dynoing each step of the way.

While the OPs car may seem to have dyno'd low, this means absolutely nothing, since he did not dyno his car stock on this very same dyno.

That being said, 30* C obviously is not an optimal temperature to dyno and would have an negative effect on overall hp/trq at that given time.

A stock pulley setup produces hardly any heat @ 10-12 psi. A malfunctioning inter-cooler pump of course wouldn't help, but in the end high iat temps were more than likely the result of the ambient outside temperature resulting in timing being pulled.

 

i made my numbers on the same dyno.. it's fine or at least it was. heat doesn't help obviously but there is something wrong with your car dean. getting pulled by an almost stock civic si tells the story right there buddy :/ get it checked by a tuner and see what's going on.

 

you ran on ravens dyno. not sure about that thing. but ya dynos are for baseline numbers... who cares if the numbers are a little low... as long as the car works alright. hell i was disappointed when i made 221whp and 219wtq on my stock dyno run. it is what it is..

 

Hey Nate, where you drunk or texting this morning? you were all over the road lol

 

I was still sleepin haha

 

But yeah, stock intake is going back on this weekend, forgot to mention that the car was running rich enough that it was spitting out raw gas out of my exhaust

 

what kind of dyno is this btw???

 

U gonna dyno it again with stock intake back on?

 

If i could afford to, but it was a dynojet dyno

 

its only 50 bucks... and yes there is deff something wrong... no dyno in america is going to read THAT low... usually 10% off is extreme... you're considerably more than 10% off...

side note, we had 5 dynos in our area at once... three were within 1.5hp of each other, one was about 7% high and another was 5% low

 

does your car have the supercharger?