Buschur's modified Maverick on the dyno w/ 3" intake and 3" catback exhaust

[RGoose85]

3" too big maybe? That was my first thought when I saw the original post. My 5.7 hemi has a 3" upgraded pipe. I am not a "it needs back pressure" kinda guy but my limited understanding of exhaust systems sais 3" seams massive for a 2l.

Thats what I think also, I would stick with 2.25" or 2.5"

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[Buschur]

Thats what I think also, I would stick with 2.25" or 2.5"

You are both incorrect but that's why the automotive world is so much fun to watch who gets results and who doesn't.

 

[Brostang]

Thats what I think also, I would stick with 2.25" or 2.5"

The exhaust just acts as a turbine nozzle. High pressure/heat gas in the turbine inlet gets converted to mechanical energy as it drives the wheel and then expands through the exit. You need a change in pressure for flow, so the idea is to minimize exhaust exhaust restriction to extract the most energy possible in the volute. A constricted exhaust can even lead to premature thrust wear on the turbine bearings.

That's just the basic explanation. Then you have to consider turbine volute and exhaust nozzle geometry for spool and efficiency.

Check out this industrial turbine cad with the diverging exhaust nozzle (left).

 

[Warren89]

Guys..... do some research and then post. The Maverick in question is a turbo. On a turbo engine, the primary function is to direct exhaust away from the cabin, clean out the crap, and muffle the sounds. The turbo takes care of all of the back pressure.

 

[Eagle11]

You are both incorrect but that's why the automotive world is so much fun to watch who gets results and who doesn't.

How far away is the cat from the turbo?

 

[Buschur]

How far away is the cat from the turbo?

Right off the turbine housing.

 

[Eagle11]

Right off the turbine housing.

Are you going catless? That made a huge difference in my BMW 335

 

[Buschur]

Are you going catless? That made a huge difference in my BMW 335

Probably can't, the commies at the EPA have everyone afraid to disable check engine lights. We will do a high flow cat though.

 

[Eagle11]

Probably can't, the commies at the EPA have everyone afraid to disable check engine lights. We will do a high flow cat though.

There is always a work around

 

[Phileaux]

Right off the turbine housing.

It's a competition on which is the best heat sink. I guess it'll be a theft deterrent.

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