Anyone have documented HP gains on a IS350 with.....

Invidia / Megan midpipes and a Joe-Z intake?

I am looking at running the stock canisters for a while to keep it quiet.

Or, would i have more gains with a axel back and factory mid pipes?

Any help is greatly appreciated.

Thanks again!

 

Joe Z is 5 rwhp

I've yet to see anybody pick up more than 1-2 rwhp with a midpipe


Joe Z is the best bang/buck for hp for any mod you mention, by far.

After that I'd look for a used tanabe for $400ish if you want to keep the car relatively quiet, you can figure on about 7 rwhp there

 

I thought midpipe give more hp than just 1 -2whp

 

and your "thought" is based on...?

 

Sorry to burst your bubble, but well, it's true. The difference between the "race" JoeZ exhaust without 2ndary cats and the street version with 2ndary cars is about 2-3hp. Midpipes aren't going to give you anything other than annoying drone and high-end rasp.

 

yeah they may only net 3 whp but DAMN it sounds sexy!!! I've had SO many ameican muscle guys compliment the sound of my exhaust more than any other car I've owned. I gotta say, I agree with them!!

Although, the G certainly has the STOCK exhaust sound every sports sedan aspires to be.

 

because a member had dynoed his car ( wald + an aftermarket intake + invidia midpipe) and his gain was 20WHp... so i "thought" the midpipe would have atleast contribued 5 of those 20 WHPs...

 

that member is Phil888, and i think you might be referring to this post.

that's a difference of 20hp between two dyno's, NOT an increase of 20hp for bolt-on parts. he had an explanation here from his first dyno run:

aside from the point that "reading is fundamental", i again would like to point you to the fact that the difference is from two separate dyno runs on two different dyno's, since the numbers from his first dyno run was not quite what he expected. the difference was NOT because of performance upgrades between the two dyno runs.

now that we've got THAT out of the way, i still question whether aftermarket mid-pipes make more noise than power, but four_o_two might be on to something...