Themick

I'd need some more info but definitely interested

MIAPLAYA

What kind of info? I can have Greg come on and answer whatever questions you have tomorrow.

Themick

Well i know its not possible as of now but i'd def like a dyno of before and after or atleast a minimum hp gain guarantee. Also will i need anything welded or is it bolt on all the way through?

Themick

Forgot to mention i am n/a as of now and plan to go s/c or t/c in the near future, would there be any fitment issues with either?

MIAPLAYA

Nope. This exhaust would bolt to the factory header flange which is shared by most if not all turbo kits and any aftermarket header you buy.

MytC

if ur turbo'd cant you make 20-30whp w/ an axle back,midpipe, and s pipe?

Themick

If it will definitley be in the 30-35whp range count me in

by the way that spec v sounds really nice

MIAPLAYA

Yes you could...thats exactly what this exhaust would be. This system would replace everything from the header/downpipe back to the muffler with 3" piping and a muffler.

jam0321

i'll get the dyno here soon enough so we can see the before and after gains.

MytC

cool

Themick

I thought this was a prototype how can you have a dyno of it?

jam0321

i'm going to do the before dyno

davedavetC

iTrader: (4)

how much hp could NA receive?

datrickster24

N/A would lose power... your not putting out enough power in order to make that 3'' piping useful!

-Dan

Themick

so more flow = less power?

davedavetC

iTrader: (4)

werd. i wasnt plannin on gettin it i was just curious. i already got my heart set on the Dezod exhaust lol.

MIAPLAYA

In an N/A car an overreduction in backpressure can cause power loss.That is why I said only built motor N/A cars would need this. This is mostly meant for boosted cars... Although if you have high compression, cams, etc motor this would work too.

zer0

If you have a 3" exhaust with a 2.5" kink somewhere that the exhaust will only flow as much as the 2.5" kink will allow. This is why we get mandrel bent piping instead of press bent. So why set up a 3" exhaust if its all going to start off at 2.5" anyway and will only flow 2.5" worth of exhaust.

If someone can logically explain why the above is wrong, please enlighten me.

jam0321

first of all, price: having to replace the downpipe would not go well in the pocket book department.
Second: As my Miaplaya explained, turbonetics did extensive research as to the diameter of the downpipe while creating their kit and found very little gains from the larger diameter.
This new design would start and finish @ 3" manderal bent.
Your argument above would mean that poeple shouldn't be seeing gains from an s-pipe or axle back exhaust if they left the mid pipe at 2.25".
But they have seen gains because freeing up exhaust ANYWHERE you can will benefit you exponentially, especially with a turbo setup...

MIAPLAYA

The reason is simple, your logic ONLY applies if there was a 2.5" restriction in the middle of the said 3" exhaust system. Then yes that would be a torque point. HOWEVER, although the downpipe is 2.5" once the exhaust gas begins to cool as it flows through the exhaust piping it will begin to expand as it cools and as more flow comes in behind it. The increase in pipe diamter post downpipe allows more area for the exhaust gas to expand and reduces the back pressure associated with that action occuring. This can be seen on almost any turbo car. For instance the Spec V kit ALSO runs a 2.5" downpipe. YOu would think by your theory then that by running a 3" exhaust as opposed to a 2.5" exhaust there would be no gain. But quite the contraty is true. In testing Turbonetics bolted up a 2.5" exhaust from the downpipe back and the car made 250 WHP (an increase of 15 HP over the stock exhaust). Going from that exhaust to the Mossy 3" the car made 275 WHP which is a gain of another 25 hp over the 2.5". Hence the total 35 HP gain over stock. Heres the dyno charts:

Spec V kit with 2.5" downpipe back exhaust:



Spec V kit with no changes and 3" Mossy exhaust: