RMW/1320Autos - Awesome Prelim Tuning Results

[Ant FR]

Quote: Originally Posted by Snowie (original)

Ant
If you want a German JCW back box system mine will be available soon. Send me a PM
My current system is JCM 4/2/1 manifold, high flow sports cat and JCM German challenge rear box setup. It is what is known as full pipe - the whole length of the silencer pipe is drilled
In the GP it is just too loud, will be changing the back box set up to JCM UK Challenge soon, this is a half pipe set up - only half of the silencer pipe is drilled so much quieter but still free flowing.

Neither set up has the flat piece as found in The JCW standard set up

Done

[Ant FR]

Quote: Originally Posted by BigShow (original)

It was windy so the sound quality aint great but you get the idea. Alski drove under strict instruction not to take it above 5k rpm as the 440's and remap aren't happening until next week.

YouTube - Mini Cooper S Drive By

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Sounds a lot like mine that Mate,trouble is you have to drive everywhere in 2nd gear.

[MINIMANIAUK]

The thing with exhausts is that the are designed for one application,
Knowing the back pressure is a guide to the flow of the exhaust , but they are tuned length pipes and the engine provides pulses of exhaust pressure, and sound pulses these shoot down the pipe and back and the timing and frequency of these effect the flow of exhaust gases and hence the power
As soon as you change something like a pulley or head you alter the speed of the air flow ,this alters the pressure wave , and alters the temperature of the exhaust gas , The tuned length pipe is no longer tuned to your engine!!!!
All exhausts are built and designed for the stock application,and may or may not work well with altered components.
Most manufacturers dont have the budget for long development programs and test on one stock car, its when you fit an exhaust on a stock car and it drops power that there is a fundamental design flaw ( these are usually found on ebay)

[BigShow]

Quote: Originally Posted by BigShow (original)

It was windy so the sound quality aint great but you get the idea. Alski drove under strict instruction not to take it above 5k rpm as the 440's and remap aren't happening until next week.

YouTube - Mini Cooper S Drive By

Cheers.. on the second run the 'crackling' as my car overtakes another Mini is just the sonic boom

Once its remapped next week and the 440's are on I'll do a proper video and publish my Evo style write up with independant dyno results and performance box figures for those that are interested.

[Paul@1320]

I'm looking forward to all off it

[Loui]

Quote: Originally Posted by 1320autos (original)

I'm looking forward to all off it

An me