trails

iTrader: (41)

allegedly twin dump downpipes can cause boost creep...anyone have any experience of running both?

Cheers,
ian

andy97

iTrader: (1)

Im using a twin dump, not experienced boost creep yet, but I have a avcr to control boost

trails

iTrader: (41)

bump, any more?

Glowplug

iTrader: (8)

I have just gone from twin to super bell, never had any creep with the twin and haven't yet with the bell, not sure if i cant here a bit more spool up/chatter noise now tho, gone from 2.5 to 3" and total decat so am getting more noise all round

trails

iTrader: (41)

were you still running the standard turbo and boost pressure...I'm assuming you are and its an import with a TD05?

Glowplug

iTrader: (8)

Yeah JDM, TD05 turbo but ScoobyECU chipped so running 1.1 bar

trails

iTrader: (41)

Oh, quite low boost then...I really need some feedback running over 1.5\1.6bar

banny sti

iTrader: (68)

On my old turbo and engine spec I was running a twin dump downpipe, I was running 1.6 bar and did get some boost creep in 5th gear would always overboost to 1.7bar.
New turbo with bell mouth downpipe running 1.8 bar and no boost creep at all but not had it long on this downpipe so will test a little a longer before I can say for sure.

Banny

trails

iTrader: (41)

Banny which blower were you running when you were getting the boost creep?

banny sti

iTrader: (68)

It was a VF22 hybrid called an md195s, made by turbo dynamics.

trails

iTrader: (41)

now hugly familiar with that version, was it prone to creep? did you run it on the bell mouth and if so did it reduce or eliminate the creep?

sorry, lots of questions; I'm upgrading my system to 3" and have accidentally brought a magnex twin dump (my fault I didn't ask the right questions!), and want to know if I should fit it or sell it on and buy an open neck.

banny sti

iTrader: (68)

Don't think it was prone to creep as I was also running a silicone inlet pipe and did not get any surge. Never ran it on the bell mouth as I changed everything together, so do not know if it would have helped.
The car was at 389 bhp and 363 lbft of torque on the old spec and this was on the twin dump downpipe, and to be honest I was happy with the way it ran.

Banny

trails

iTrader: (41)

thanks Banny, I'm running one of AndyF's 18g's so not really prone to surge...I just want to avoid fitting it and then replacing it because its caused issues.