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Yep thats a great spot since its already got the bung on it. Ive measured some pretty low back pressure running a #10 hotside with 3" dp and exhaust. Now I will be running a T3 0.82 housing and a slightly enlarged crossover modified to fit the GT turbo
what would be an ideal number for exhaust pressure? are we hoping for a vacuum?
No vacuum in a turbo car...
An ideal pressure would be less then 1 : <1 (intake vs exhaust).
But that won't happen without a huge turbine side (lots of lag).
Good would be 1 : 1.5
And acceptable is 1 : 2
I wouldn't say there is any ideal number. Take the cat off your N/A car and go drive it around dumping at the headers. It will run like hell. Loud, but not good. With turbo cars it's somewhat of a different ballgame. Exhaust backpressure and the manipulation of it effects the torque curve of an N/A car. For a turbo car, its as mentioned above (to the limit of my knowledge).
i have wondered what the 944 would sound like with a straight pipe all the way to the back of the car. i have heard it open headers, that **** is loud lol
No vacuum in a turbo car...
An ideal pressure would be less then 1 : <1 (intake vs exhaust).
But that won't happen without a huge turbine side (lots of lag).
Good would be 1 : 1.5
And acceptable is 1 : 2
-Rogue
think those are good rule of thumb ratios for a supercharged car? only reason i ask is the lack of a big restrictor in the exhaust flow(turbine)
think those are good rule of thumb ratios for a supercharged car? only reason i ask is the lack of a big restrictor in the exhaust flow(turbine)
No, a supercharged car will not have the same amount of backpressure to contend with. In fact, cam/exhaust selection with a supercharger is more similar to an NA car then a Turbo one.
For a mild supercharger application (yours), I suggest running the stock turbo exhaust (without a cat if possible). The stock turbo stuff is 2.5" with a straight through muffler - perfect setup for cheap.