Scooby_CL

iTrader: (2)

What have people done when they wanted to block the dv off with the newage sti tmic? if it where just a simple samco pipe like you get on a fmic thats easy to block off but the sti tmic has a specific dump valve fitment...

so what have you guys done to block it off? made a blanking plate? or can i simply pull the vac line off the dv and plug that?

also i dont need people saying keep the stock one, i know the pro and cons

chrisdicko

iTrader: (21)

When I had my TMIC on, I went to a local fabricators with my standard DV, and they drew round the shape and cut one out. Perfect fit and worked as I intended! I put a bolt in the vac pipe too.

Scooby_CL

iTrader: (2)

cheers mate, that's the idea i had as well... how thick was the blanking plate they made?

chrisdicko

iTrader: (21)

About 4mm Stainless.

Scooby_CL

iTrader: (2)

cheers mate that's perfect, think that's the only way to get it done with a tmic... i'l look into getting a blank made to fit.

cheers for the help

harvey

iTrader: (48)

3mm or 4mm stainless sheet. Steel ruler. Marking scribe. Angle grinder/disc cutter. If not a sheer/guiloteeen. Cut shape, file, drill two holes. Job done.
Alternatively, flange adaptor plus silicon joiner and plug the joiner.
Flange adaptor and joiner is £30. Plug can be anything handy around 36 diameter. Postage say £3.50.

harvey

iTrader: (48)

FWIW I have made a couple of these for New Age and Classic so we are never caught short.

Frosticles

iTrader: (1)

Sorry for being thick but, what does it do when you block the valve off?

Scooby_CL

iTrader: (2)

Well a dump valve releases the built up pressure from the turbo when off throttle... removing/blocking/deleting the dump valve will induce compressor stall, that's when the air has no where to go and goes back towards the turbo which then gets chopped up by the compressor wheel creating that 'flutter' sound.

Can damage some fragile or old turbo's but the main effect is for sound.

Frosticles

iTrader: (1)

Like a cosworth then. I used to have a sapph that chattered it's knackers off. Nice sound and much better than a dump valve sound.

Scooby_CL

iTrader: (2)

in short...yes

Frosticles

iTrader: (1)

On a cosworth though, the "stall" was made more prominent with a group A air filter. Would the sound be heard much on the impreza with the standard air box still fitted?

Scooby_CL

iTrader: (2)

Nope, i tried the other day. stock box with greens filter... blanking off my Td05 18G couldnt hear a thing

Get a fmic and open cone filter and it would be nice and loud

harvey

iTrader: (48)

Running no BOV as Subaru intended is likely to reduce the life of your turbo but there again so is modifying your engine if you use the available additional performance frequently.

Neanderthal

iTrader: (6)

I read (prob somewhere on here) that the VF series of turbos didn't cope very well with blanking off the DV. The TD's are stronger so can cope much better.

I compromised and bought an adjustable DV from Chrisdicko on this thread. It stays closed at low boost, giving that nice flutter sound but at higher boost levels it vents it.