i got a f22 and im boosting it in about 2 months what size exhaust should i run for best proformance and sound. 2.5 or 3? and what muffler

 

depends on the amount of boost you'll be running really. if you plan on staying around 6-8psi, get a 2.5" and go with a Magnaflow muffler. They sound and look great!

 

3" Turbo Back... like me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ImPuLsIvE &raquo;</TD></TR><TR><TD CLASS="quote">depends on the amount of boost you'll be running really. if you plan on staying around 6-8psi, get a 2.5" and go with a Magnaflow muffler. They sound and look great!</TD></TR></TABLE>

No, it doesn't depend at all.....
If you want to make the most power from what you have a 3" is REQUIRED!
22whp/17tq@8psi by switching to 3" from 60mm/2.36"
Look into KTeller with a Magnaflow unless you have someone local that can make you one.
VIBRANT makes some nice mufflers as well......look into their Stealth series.

 

3 - 3.5 inch...keep the back pressure to a minimum, its not like N/a. BP = lost hp. Buddy club turboback straight exhausts are awesome, but SUPER loud. Get custom bent pipes. its cheap and easy to do.

 

I have a 2.5" downpipe on my f22a1 that's boosted. Under the engine it goes to 3" and connects to a magnaflow muffler at the end

 

The best exhaust for turbo is no exhaust, so go big.

 

im running about 6 psi and with 3 inch and a 3 inch magna flow muffler is that goin to be hella loud.

 

I would say that it wouldnt be too loud. The turbo kinda quitens the exhaust from the manifold. With a N/A setup the explosion comes out of the head and goes through the header to a muffler and here with most applications a 3" muffler will be too large b/c it will cause the engine to loose back pressure which is needed.

On a turbo you have the explosion going from head to manifold to turbine housing. This acts as a silencer so to speak and will quieten down the loudness level a little. But with a stronger explosion you get louder noise so over time it will compensate for the loss and will be be louder with more and more boost.

My recommendation is to have a 2.5" downpipe connecting to a 3" pipe. The f22 is a torquey motor, it is not a high revver, horsepower crosses torque at like 5200 rpm on the dyno. that leaves us with 1300 rpm to make max hp, if you use a 3" downpipe you will loose a significant amount of torque to gain minimal hp. If you choose your setup right you will be amazed at what kind of a beast the f22 is, I really enjoy mine and if you have any questions please just ask me

 

F22 like every other gasoline engine cross at 5252

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thomas188 &raquo;</TD></TR><TR><TD CLASS="quote">I would say that it wouldnt be too loud. The turbo kinda quitens the exhaust from the manifold. With a N/A setup the explosion comes out of the head and goes through the header to a muffler and here with most applications a 3" muffler will be too large b/c it will cause the engine to loose back pressure which is needed.

On a turbo you have the explosion going from head to manifold to turbine housing. This acts as a silencer so to speak and will quieten down the loudness level a little. But with a stronger explosion you get louder noise so over time it will compensate for the loss and will be be louder with more and more boost.

My recommendation is to have a 2.5" downpipe connecting to a 3" pipe. The f22 is a torquey motor, it is not a high revver, horsepower crosses torque at like 5200 rpm on the dyno. that leaves us with 1300 rpm to make max hp, if you use a 3" downpipe you will loose a significant amount of torque to gain minimal hp. If you choose your setup right you will be amazed at what kind of a beast the f22 is, I really enjoy mine and if you have any questions please just ask me</TD></TR></TABLE>

why would u recommend a 2.5" dp? just curious..thats like putting a kink in a garden hose.

 

you can also go with a 2.5 cutout, it can either be boost activated, or by a controller.

 

whats a 2.5 cut out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hawkze_2.3 &raquo;</TD></TR><TR><TD CLASS="quote">The best exhaust for turbo is no exhaust, so go big. </TD></TR></TABLE>

Agreed Go three inch dp and exhaust or bigger! I run 4 inch aluminum exhaust.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Greg H &raquo;</TD></TR><TR><TD CLASS="quote">

Agreed Go three inch dp and exhaust or bigger! I run 4 inch aluminum exhaust. </TD></TR></TABLE>

I'm jealous..
Again, No exhaust is Best

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Greg H &raquo;</TD></TR><TR><TD CLASS="quote">

Agreed Go three inch dp and exhaust or bigger! I run 4 inch aluminum exhaust. </TD></TR></TABLE>

do u scrap that because i know 4 inch wont bend into the stock places thats crazy how does it sound. does it back fire hella.

 

This is what is looks like. This one is opened and closed by a controller.
http://shop.quicktimeperforman...&p=24

 

I stated that b/c the motor is built where torque is the significant figure, and without the torque it is a turd. It has low compression which makes it less peppy on throttle response and if you take away that extra back pressure by using a 3" dp the motor will be sluggish before entering postive pressure. Yes it will gain maybe 15ish hp but that will be towards the end of each gear cycle and that will put less power over the board rather than more power under the curve. I am not interested in peak numbers b/c I am a firm believer that more power under the curve will out perform a peak number.
For instance: My friend has a boosted h22a and I out perform him easily. He is only running 8lbs to my 10lbs but is making more hp than I am. His higher hp is just a peak number, it is not achieved until late in the power band and it is only there for a little bit before having to shift. Where I achieve my power sooner and keep it until shifting.

This is exactly what im talking about with the 2.5" dp. To gain the little amount of extra hp from using 3" all the way will creat less power under the curve because it will change the physics of the engine. If this was a 10:1 compression engine we wouldn't be having this issue though.