veerinder9

iTrader: (1)

Ive gone through many threads on downpipes many to which seem to be very old so would like a more up to date information on it lol anyway my question is that does a downpioe affect the spool up of a turbo and/or does it affect the full boost it reaches at, I know its after the turbo but there seems to be o much stuff about back pressure required etc but I just dont get it? Also whats the best downpipe to use, divorced or bell mouth, thankyou all advice is appreciated

veerinder9

iTrader: (1)

Anyone

veerinder9

iTrader: (1)

????

stonejedi

iTrader: (51)

if you have gone through the old threads all the information you need will be there the law of physics dont change. less restriction=better flow.SJ.

veerinder9

iTrader: (1)

Thanks mate, but was wondering does it affect spool up of a turbo? :s

Graz

Yes, as the gases are flowing more easily the spool up will be faster / more aggressive. You won't get any more boost though as the ECU determines this. I'd favour a bell mouth jobby, H&S are good

stonejedi

iTrader: (51)

As above^^^^.SJ.

veerinder9

iTrader: (1)

Hmm see ive got an 3" decat all the way, have a decat downpipe but its got two holes, could that cause a restriction? And I thought spool is only because of the headers and uppipe? And not anything after the turbo? This is what confuses me lol

scc28

iTrader: (1)

ive got a H&S bellmouth and its good, nicely finished and fitted perfectly

veerinder9

iTrader: (1)

Any pics mate? Also all the downpipes the same? Mines classic 2000 v6

scc28

iTrader: (1)

mine will be different as it the 2.5 newage one which is much much shorter but the bellmouth bit will be the same, same principle just yours will be longer