cookstar

iTrader: (6)

Yet another question from me.

Have a few mods planned for the new year and currently have a H&S full decat, up and down pipes are decat.

At what level do you need to start considering a 3 inch system?

Or is this something that is beneficial at any stage, can you go to big too soon with exhausts?


Cheers


Cookie

Daveo

I'm sure someone on here was running 500bhp with a 2.5 system.

Dave

dynamix

iTrader: (3)

Cookie - the 3 inch system will flow better than the 2.5 but wont be costing any power until over 350 i think. (Why is it that 350 is the point for all of the major mods??) Above that figure, it will make a small difference power wise but a nice difference sound wise

I am running Milltek 3 inch full decat btw

911

Agree with Dynamix.
I was told a 3'' on a sub 350bhp engine was wasted, but essential on an over 350 bhp engine.
Graham

cookstar

iTrader: (6)

Thats good, looks like my system will do then for the time being.

WOW, the first thing i dont have to replace

silent running

Plus if you stay under 350, you get to keep your gearbox and possibly clutch. After 350 it seems to be a slippery slope.

cookstar

iTrader: (6)

Have already had quoted for a 6 speed conversion with DCCD

GROWLER_GRRRR

cooks how much for the gearbox then ??

any sti injectors on the go yet keep looking !

vindaloo

I think the answer is, it becomes more of a restriction sooner if you retain a cat. Not too much of a worry, yet, in this country. The cat retains/adds heat to the exhaust and so needs extra volume for at least the next bit of the exhaust system.

J.

cookstar

iTrader: (6)

About 2k plus fitting