okay guys check this out, let me start off with the mods that i have before i tuned.

Injen CAI - Stillen Full Catback Exhaust System - Stillen Straight Pipes - DC Ceramic Headers 3-1 - UR 3 Piece Pulley Kit - Blox 5/16 Spacer - Unichip

Before the tune i dyno'd at 232 WHP and 224 TQ... After the Tune i got 249WHP and 232TQ

I thought i was going to get near near 275+whp..

I also have a set of Tenzo GF-7 19inch rims with high profile tires.. dunno if that does anything.. any feed back would be great!

 

Doesn't seem right to me.

I've heard people get closer to 250 at the wheels on stock parts.

 

not right. don't worry about it man. dyno's suck. all they do is let you down.

 

How can anyone determine how it sounds without specifying what kind of dyno was used? DynoJet's and Mustang Dyno's read very different.

 

Um, because no matter what type of dyno it was, with those mods thats low, hell thats low for stock.

 

You might be at a high altitude? The dyno might read low compaired to others? I would say the dyno is a ball buster your before numbers were low as well. With a tune you gained 18whp and 12ft/lbs on a tune that seems alright to me.

 

go run 1/4 mile dude.

 

That does not sound too far off to me. You have an 04 so that is the 280 horse motor. If you assume 17% drivetrain loss, that's about 232 at the wheels. The exhaust, intake and pulley should add around 10-15 wheel hp tops, the spacer mostly adds midrange (I think it actually lowers top end) and I have no idea about the unichip. So it seems your dyno run returned slightly lower numbers than expected, but not by all that much. There is no way those mods would return 275 wheel hp as that would equate to about 331 hp at the crank. That's 51 more than stock and you are not going to get that without some really serious mods or FI. The wheel and tire size, as you mentioned, may be the culprit. If they are larger in diameter than the originals then you effective raised the final drive ratio which will lower hp reading. If they are heavy too, that will rob a couple hp too. Any other differences could easily be attributed to errors in the test process.

 

it was on a dynojet, he said if i was in utah id prolly have like 10hp more.. lol?

ya ive seen stock get similar numbers... its a real buster man i dont know what to do now. before the tune this was me against my friends S2k



he has some custom 1grand intake and straight pipes.

still beat him but not by much.

 

oh right didnt notice it was an 04, probably fairly accurate then dude.

again, dynos suck. all they do is ruin your day...

 

ya...still low numbers to me

 

The numbers sound decent for the mods u have. It's hard to determine bc u didnt get numbers while u were stock. U have to remember that u can't just do ricer math and say intake makes 5whp + exhaust 10whp = 15whp.

I had the similar setup as u with intake, exhaust, spacers, headers, cats, ur pulleys, unichip and I only made 245whp on a DD dyno (5at) so dont feel bad... get FI

 

Should reflash the ecu possiblyi dunno though

 

Ok, the actual numbers themselves mean nothing. ALL dynos read different, and changes in temperature, altitude, etc factor in greatly. It's just the delta (change in hp/tq) that matters.

Furthermore, you've got to realize that simple bolt-ons don't do much for the G... if you want a real power increase, then it's gotta be F/I. A 17whp increase sounds about right... if you want more top-end, why don't you ask them to raise the rev-limiter to 7100 or so?

 

its not the dynos fault


find a new tuner