New Exhaust - sounds like a MX-5!!!

[project.r.racing]

after killing the previous exhaust, refer to thread: -

http://www.astinagt.com/forums/showthread.php?t=7978

i had to get a new axle back section made up.

once i had the car up on the hoist. i measured the intake of my old muffler, and to my surprise. it was only 51mm (2") in diameter. wow! all this time i've been thinking it was 58mm (2.25") damn shafty buggers who originally put in the exhaust and charged me for the bigger. and to think that i was getting all that power from a 51mm (2") system.

anywayz - from the rear axle back i had new mandrel bend piping, super cat muffler and old 4" tip fitted and now it sounds like a race car quad throttle mx5 engine!!! it's quiet as all hell compared to the old exhaust. but releases noise and extra power/torque between 3500-5000 rpm.

i'm very happy with it...

next on the list to do is new flex joint, 63mm (2.5") commonwhore catalytic convertor and the piping between them. can't wait to have that small 45mm (1.75") piping removed to unlock more powah!!!

next after that is the piping between the cat and rear axle. it's still 51mm (2") press bent piping with a big resinator. just gonna get 58mm (2.25")mandrel bend piping and no resinator fitted.

then finally - replace my 4-2-1, 42mm (1.5/8") id piping extractors for port matched, 4-1 42mm (1.5/8") with way longer primaries.

check readers rides for more details if you wanna know more about it. it's a full race exhaust that has been tried and tested. but i'll probably have to test and replace it many time again. lol

going from 2" to 2.25" now, thinking that i already had a 2.25" system has now thrown my end power calculations into a spin. after thinking/calculating that 115-125kW was achievable with the 2" exhaust at the wheels. it'll be interesting to see what the 2.25" could do now.

ryan