back pressure

[rsweeney 40]

just fitted decat and there is back pressure but not that much , is this normal ?

decat is made from the old cat with inners cut out + welded up - i also put exhaust sealent around weld to make sure it wouldnt blow

its running standard exhaust sytem bar decat and the gti supersprint still fitted

[russj249 2]

Yea its normal, if you loose the cat you loose a lot of back pressure.. you might notice it popping a lot more on overrun. Also I noticed that you seem to loose a little amount of torque unless other mods are tuned to suit.

[rsweeney 40]

ok thanks , sound is awsome i have a cone filter but would i need something like BMC CDA to counter torque lost ?

the gti supersprint fitted is restricting it i guess ? i have a remus backbox for a jetta but half way through modifying it to fit

[craggsy 91]

You will need a turbo to replace lost torque

[oldmandon 1]

You will need a turbo to replace lost torque

LOL That's extreme, as you will get LOADS more torque!!!!!!

Get a decent exhaust and cone filter, or panel filter with the air box drilled out, and that should be enough to counter the slight loss in your original torque level, in fact it should increase SLIGHTLY!!

[ashmk3 0]

I do like craggsys top gear maths lol

[oldmandon 1]

I do like craggsys top gear maths lol

He probably developed in the same amoeba pool as Mr Clarkeson!!!! lol

[BigDaddy 0]

all i know mate it sounds amzing please finish modding that remuse it sounds soooo much better then the gti supersprint happy with the cone filtre i got for u then XD

[Biggazvr6 0]

I ran 6 branch, decat 2.5" system with one box. I loved it but it was very loud. The neighbours loved me!

[rsweeney 40]

I ran 6 branch' date=' decat 2.5" system with one box. I loved it but it was very loud. The neighbours loved me!

[/quote']

sweet, looking into this setup :

6 branch are they worth the money ? and what make

decat - already fitted

straight pipe from decat to back box , deleting the rear centre box . how would i go about this or best to keep centre box ?

and supersprint rear silencer - are the gti and vr6 ones the same as the one i have fitted is from a gti

[BigDaddy 0]

all i know it will sound amzing, biggaz put up a vid so the world can hear what the vr6 should sound like

[Biggazvr6 0]

the only clip I have is me revving it in a lay-by. Sound good and you get the idea so to speak.

[rsweeney 40]

all i know it will sound amzing, biggaz put up a vid so the world can hear what the vr6 should sound like

[/quote13340

yeah all thats fine but i need to know what the best setup is , dont want it stupidly loud but when it revs i want a real good grunt.

i want it to run nice and smooth too , so anyone in the know how who can help with ideas?

[Biggazvr6 0]

The best pipe size IMO is 2.25" any bigger and it tends to be quite boomy in the cabin. If your running decat, it's best to replace the cat with a straight thru box somewhere in the system. Depending on how loud you want it, I'd run a small box under back seats and a small box at the back, all straight thru. This will give you a nice sound but not too loud. You need to keep the same amount of boxes as the oe system but use straight thru design. Research or look at the miltek systems. They make a reasonable sound and a exhausts make should be able to make this sort of setup for arround 2/3 the price of the miltek. Hope this helps.