4-tip exhaust...

[2XS]

Where are you getting it done?

[240MPS]

Could it affect the power of the car, because I have been told that somebody put a big diamater exhaust and lost power... ???

[MattMPS3]

That theory only really applies to NA cars, when it comes to turbos the bigger the better.

[240MPS]

No it was on a turbo one of the staff at Grand Prix put the biggest he could get on it and it ran like sh*t on a cruise with work it was a MPS3 07 model, had it removed the following week....

[ChaMPS]

That theory only really applies to NA cars, when it comes to turbos the bigger the better.

That's not true either...... Going to big can still effect flow on Turbo cars

[240MPS]

That's why I would be worried to get quad pipes I love them but I would need to look at some proven figures before I dished out money.... I got great power and torque now with the exhaust and other mods wouldn't want to get quads and loose power....

[ChaMPS]

Quoted from a resident XR5 expert....

"On a turbo motor it is ideal to have exhaust gases expelled as quickly as possible from the engine/exhaust. Hot exhaust gases move faster than cool gases, so ideally you do not want to allow gases to cool too much. Having a pipe diameter too large for the engines potential flow rate will cause rapid expansion and turbulence inside the exhaust system which will in turn allow gases to cool and therefore cause decreased velocity. On the other hand a pipe diameter which too small will not allow maximum flow rate and will throttle the engines potential. This being the case it takes some experience and/or experimentation to find the happy medium for optimum performance.

Another thing to remember is as exhaust gases travel along the exhaust system they will naturally cool. So by dropping the pipe diameter to the rear section of the exhaust the velocity of gases inside the pipe can be maintained and therefore continues to expel quickly."

[MattMPS3]

That's not true either...... Going to big can still effect flow on Turbo cars

Yes, OK I wasnt going to over technify things, some scavenging (back pressure) is still required on turbo cars, but is not as make or break critical as on an NA setup, besides this is all manifold & downpipe design, by time the gasses flow down the system, a single tip, or quad tips is somewhat irrelevant.

[ChaMPS]

Totally agree..... tips will make no difference.

I wonder if those tips are really 4".... Mine look heaps bigger

[240MPS]

Thanks guys .