So on Saturday I went to Haddad Motorsports and got my car dynoed. So far, i have installed a full 2.5 inch cat back with a magnaflow x-pipe and magnaflow mufflers and a roto-fab intake. And the numbers are in........ 351.3 horsepower to the wheels and 360.1 ft/lbs of torque. :driving:

Here are the pictures of the graph:

http://i97.photobucket.com/albums/l215/danielz1836/Dyno%20Results/DynoG8Horsepower2.jpg
http://i97.photobucket.com/albums/l215/danielz1836/Dyno%20Results/DynoG8Torque.jpg

How loud is your car with the Catback and Magnaflow Mufflers ?

not bad.. was these numbers after tuning or no tuning?

Nice, did you tweak the ECU? Did you install the cat back system?

Did you ever baseline your car? Looks like AT LEAST a 45rwhp gain from exhaust, CAI, and tune. Thats insane. Essentially, congrats on making as much power as the 09 GXP

Impressive, goes to show how choked up our cars come from the factory.

It's also on a Dynapack, so figure about 10-15hp less on a typical dynojet. Even less on a Mustang, but most people use Dynojet numbers. Looks like you're making right around where a stock manual-transmission GTO would, which is really good for so few mods. Also looks like it's not even tuned yet, judging by the AFR numbers. Not sure why the AFR numbers go up so much, unless you were tuning it on the dyno, but the top-end AFRs are still really low.

Thanks guys. I have not tuned the car yet, however that is coming up soon. The catback was done by a local muffler shop and it was from scratch. It is actually not too loud at all. Only when you are driving on the streets is when you can hear it the most. On the top end, only the intake is noticeable.

Nice numbers. Get that thing tuned.:D

wow. I want that done to my car lol. GET A TUNE!

Wow... you might be above 370whp with a tune for 93 octane and your current mods.

Great numbers. Were you running premium or regular fuel? Congrats.

I forgot to ask, what do you think of roto-fab intake system??

I was running premium fuel. I plan on tunning the car soon, just need to get the proper funds. Also, i love the roto fab intake. It sounds mean at high rpm's and it was very easy to install. Its a great product.

Very impressive!! Keep us posted after the tune.

GPDan forgot to mention.

All but the top three #'s are from my stock G8

I printed it that way so that he could get an idea of his gains.

Its amazing how the fueling is near identical.

There is at least 15-20 rwhp in tune on his car

Premium in CA = 91 octane

Thanks
Mike haddad

are these cars tunable? I mean with the cylinder deactivation et al.

are these cars tunable? I mean with the cylinder deactivation et al.

Abusolutely

With great results to boot.

Thanks
Mike Haddad

Hey Mike, You should tune my car for free so everyone can see the results of a tuned car that is pretty much stock.......:gr_jest:

So what would be his HP at the flywheel? RWHP is the most important of course but just curious, what his 362 HP GM claims amounts to after tune, exhaust and CAI.

GPDan forgot to mention.

All but the top three #'s are from my stock G8

I printed it that way so that he could get an idea of his gains.

Its amazing how the fueling is near identical.

There is at least 15-20 rwhp in tune on his car

Premium in CA = 91 octane

Thanks
Mike haddad

That's cool - thanks for posting this info. So, from the rotofab intake + exhaust the car made about 25-30 additional rear wheel horsepower over stock, right? Wasn't exactly sure from the graphs- looked like your stock G8 GT made around 320-325 rwhp (SAE) on the dynapak dyno. If that's the case, that's pretty impressive.

Where are you guys located?

Where are you guys located?

Inglewood CA.

Steve

Inglewood CA.

Steve

If i get my way I will be seeing you guys soon. I also have to figure out a way to ship my car over to you guys. I will PM you guys when im ready. I want the 1900 Magna charger installed.

If i get my way I will be seeing you guys soon. I also have to figure out a way to ship my car over to you guys. I will PM you guys when im ready. I want the 1900 Magna charger installed.

We could probably figure something out on the shipping. Let us know when your ready.

Steve