Brought my car to DYNO test today.Wish to see how it goes before the ECU tuning so have idea how ECU tune could do with it.

Car has MILLTEK EXHAUST AND HEADERS,BMC AIR FILTER and IPD plenum.
It done 433.2 AWHP @ 6000RPM with stock ECU and SPORT MODEL ON.

Im from NEW ZEALAND so the best fuel I can get is 98RON which is same grade as 93 octane in USA I believe.Is this result fair?IPD really worked?Anyone done a dyno with exhaust/header and air intake only?How it compared to my one?

 

Those numbers seem very good to me considering you only have exhaust, plenum, and intake filter...

 

I think the only way to tell if the plenum was really effective is if you did a before/after dyno with that certain part alone. Nonetheless you're making some great bolt-on power and I think the plenum is helpful in some ways anyway...