Plenum 71mm on Chim 430

[PH430]

Does an enlarged plenum to 71mm increase the performance, torque and trottle responce on my Chim 430?

With one of you have experience with it.

Thanks for all your comment

[PH430]

Thanx for your comment guys.

My 430 has carbon trumpets, vectra injectors, adjustable fuelpress regulator, inductionkit for ACT with K&N filter. It's up now at 275BHP.
At revs above 4900, the engine is running rich. The standard AFM is in place, but i have got the 20AM to get fit on it with a new map from ACT.

I am wondering if the bigger AFM with the 71mm plenum wil give me increases in BHP, torque and trottle responce.
Is it possible to get it on a 300BHP?

[PH430]

I am running on a programmed 123 ignition system.

[PH430]

Then first change the AFM and maybe afterwards the plenum.

[PH430]

QBee said:

The only thing to be aware of is that every change that requires a remap costs you a remap - travel, time off, hassle and the cost of the mapping itself.
So work out which of the things that you are likely to do require a remap, and do them all at the same time

I have got the complete set of ACT. 20AM and a new chip and resistor for the CO trim.