exhaust prototype
#17
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The actual muffler. Looking at the picture of your muffler next to the factory muffler it appears the in pipe on the left side of the muffler is directly where the muffler strap would be located.
Look at the witness marks on the OE muffler and make a comparison.
Look at the witness marks on the OE muffler and make a comparison.
#18
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
premuffler is straight through 5" diamter 2.5" straight through. Weight is way less then stock but I will get you weights shortly.
The design for the rear muffler coming inward towards the top was simply an adaption to our 1in1out for the 3.2 carreras as they are realitivly quiet we wanted to be on the same sound level. I am going to do one more prototype that has a different flow path and do back to back comparisons in spring.
The design for the rear muffler coming inward towards the top was simply an adaption to our 1in1out for the 3.2 carreras as they are realitivly quiet we wanted to be on the same sound level. I am going to do one more prototype that has a different flow path and do back to back comparisons in spring.
Rgds
Harald
#19
Pro
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
just to be clear the premuffler is 3" id up to the ball flare outlet which is 2.5 inch
As to clearing stock strap(muffler) the driver side will not but we would supply our own straps anyhow
As to clearing stock strap(muffler) the driver side will not but we would supply our own straps anyhow
#20
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Pre muffler ID 3inch = nice, restriction free up to 340 HP
Ball flare outlet 2.5inch = not so nice, restrictive over 255 HP (4% loss @ 300HP)
As tried to explain in my PM, the 964's power potential requires different exhaust design parameters than a 3.2 911.
Rgds
Ball flare outlet 2.5inch = not so nice, restrictive over 255 HP (4% loss @ 300HP)
As tried to explain in my PM, the 964's power potential requires different exhaust design parameters than a 3.2 911.
Rgds
#21
Pro
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The problem is the part of the parameters of the project was to use stock clamps etc so that people could purchase one part or the other but a motosports version is a possibility as well for the hard core guys.
#24
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I measured my Cup Pipe today, it's 2.75" fitted with standard clamps, Cartronic do a 3" Cup pipe which also fits right with standard clamps (don't know whether simple 'porting of the gasket is necessary though).
A performance/motorsports version sounds great and should be easy enough to fit.
Best regards
#25
Pro
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Some additional feedback:
I measured my Cup Pipe today, it's 2.75" fitted with standard clamps, Cartronic do a 3" Cup pipe which also fits right with standard clamps (don't know whether simple 'porting of the gasket is necessary though).
A performance/motorsports version sounds great and should be easy enough to fit.
Best regards
I measured my Cup Pipe today, it's 2.75" fitted with standard clamps, Cartronic do a 3" Cup pipe which also fits right with standard clamps (don't know whether simple 'porting of the gasket is necessary though).
A performance/motorsports version sounds great and should be easy enough to fit.
Best regards