fOrD mAn Xf

Will be doing the turbo exhaust soon, but I am undecided on what size to go, 3" will drone won't it, at higher revs, gives off droning sound which drives you insane, but at the same time is flowing a lot better than a 2.5", the 2.5" won't drone as much, but maybe not flow as good? The turbo exits via a 3" dump pipe, so would be better to keep it 3" all the way through? or go 3" to muffler and 2.5" out? Car is XF Falcon.

Please let me know your thoughts!

 

ebxr8240

3 1/2 dump then to 3" with two straight through off centre mufflers , NO baffles!!!!!. One where the std one goes and another round type where the rear resonator would go...This way you'll have THREE mufflers...The first one being the turbo.... Trust me no droan ... Quiet as!!!!

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fOrD mAn Xf

OK thanks for that! That would be the way to go!

Dont mind a loud exhaust on a V8, sounds great, but six cylinders always seem to moan and drone when you put a big exhaust on them.

bagged88

yea i would go with the 3' i dont think the drone will be as bad as you think

fritzz

im running a 3.5' dump and 3.5" cat with single 3" and 1 muffler and its quite and its very peaceful to drive no drone wat so ever.

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fOrD mAn Xf

ok thanks for the input guys!

MarkZE

Run the 3.5" as far down under the floor as you can, somewhere around the back of the drivers seat make a flange so you can drop the whole exhaust when you want to take it out to the drags.

Once you have the engine sorted drop the pipeand retune it for the no muffler setup and you will gain heaps more power when you hit the track. Exhaust backpressure is a huge killer of power of the ford sixes. run as much straight pipe as you can after the turbo and try to use 45 bends instead of 90's on the dump pipe where you can. Run the wastegate pipe right down a fair way before you plumb it into the main dump pipe also.

fOrD mAn Xf

thanks for the input MarkZE :-)