but 303 is the same as a car would do stock - without headers, cats etc...so awe set up really didnt add power...but obviously the SC did

 

ignore the actual numbers. just look at the delta between the before and after. if there is one thing i've learned lately is that dyno "numbers" don't mean jack.

dynojet numbers are often inflated and unreliable due to the nature of the machine.

mustang dynos are a definite step up with their resistance roller design. they'll read lower than a dynojet for sure, and still lack some accuracy due to variables in tire pressures and strap tension.

dynapack dynos actually hook up to the wheel hub. it's probably the most accurate and most expensive commercially available dyno out there without actually removing the engine. a lot of shops don't use them due to the cost and the ego deflating numbers they generate. the dynapack will read lower than both the mustang and the dynojet, but is probably the most accurate of the three. i saw about a 35ish hp difference between my dynojet and dynapack runs.

that being said, the mustang is a good compromise between the two, with cost and reliability being somewhere in the middle.

his numbers seem right about where they should be for a 3.8S. don't expect to see a ton of peak hp with just exhaust mods. i'd be willing to bet he saw some decent gains in the 4000-6500 range though....

 

man, you scared me too! lol

anyway, that's SICK! congrats! Tony's right, you won't pass the CA visual smog inspection, but since your car is new, you won't have to worry about getting it smogged until 2010. until then, let 'er rip!

 

I bet there is a ton of difference.Just waiting forward to do mine next week.

BUT having in mind Evos claims

i thought the power loss in 2wd Carrera is 18%.If so this car is making around 492 hp at the flywheel.Not 500+ for sure.I know it is not a big difference in numbers but it might be inside the car.Maybe i am mistaken with the dyno or something.DeputyDog what do you think?

 

Most people estimate 12-15% for a 2wd 99X, and 18-20% for the all wheel drive versions.

 

So what should expect a 997 S S/C owner is 420 at the wheels wich is 470 at the flywheel with 12% power loss,right?Even so the Evoms Dyno tested the 3.8 lt Carrera S and had 452 at the wheels (*1.12 = 506 hp at the flywheel).I am so confused....

Well actually it doesnt matter....I bet the car has a great difference bofore and after....

 

I think evom's dyno is a mustang dyno, which is far more conservative than others.

 

AMEN, deputydog95.

There is not dyno data of this car before our exhaust. So how can one question whether or not our system did or did not make power?

The proper way to test is to first do a baseline fully stock, then test modified. The delta is what counts.

If this car dynoed at 50000000hp stock and 50000100 after. I would say we did our job. The supercharger picked up 100hp.

Make sense?

 

i bet we take 10 stick 997 s on same day and sme dyno and they all pull between 300-305

every dyno sheet i have ever seen along with my car stock all pulled in this range..

 

depends on what dyno you use. i'll beg to differ if you're using a dynojet. those numbers would be all over the place.

you can easily see 10hp differences between stock cars. they're all a little different.

 

Very impressive numbers! Enjoy.

 

like i said, forget about the actual numbers. they're irrevalant as you'll see differences running on the same dyno, let alone different dynos. focus on the differences between your before and after runs. that's all that really matters.

i'm not saying evo does this, but manufs. have been known to play with dyno readings. i'd put more stock in an independent customer dyno than what i've read posted on a seller's website. do your own testing and then you know for sure. besides, dyno runs are cheap. why not do it? i think we've all seen claims for 10 rear wheel hp for mufflers alone. common sense is key here.

stick with mustangs, or even better, a dynapack if you can find one.

 

I did a bunch of baseline runs on a local dyno - that way, when (if?) I mod the 997S, I can go back to get an apples to apples comparison. I need to do the same thing with the A3...

My car hit 310 whp/265 wtq FWIW...

 

Well done mate, now put that S/C and AWE full exhaust

 

The two routes I am considering are a full Fabspeed/AWE/Champion F77 NA setup or a RUF Kompressor conversion. I have to buy the engagement ring this year, so the 911 gets the love next year.