Hellooo

I think I may have a problem with my dump valve.

It's a standard one. The only way i can describe it, is as a wet farty sound, when i let off the throttle quickly, after booting it.

It has gradually got worse over the last couple of days.

Has any one got any ideas on how I can test it and make sure that it the DV thats playing up ?

Many thanks

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94 ST205

Silver and stuff

Well they don't really have much to go wrong with them. Stock ones have, however, been known to explode so it's worth giving it a visual inspection

When you look you'll see a sort of flying saucer thing which is the main part of the stock DV. This has a visible join in it and it's this join that fails, particularly if you are running increased boost

While you're poking around check the vacuum hoses. There should be 2 connected to the DV itself which should join together via a one way valve to s singe vacuum connection coming from, as I recall, the inlet manifold.

I will take a piccy of mine for the hall of horrors gallery

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JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

You've kept a blown OEM dump valve JP

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Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

I like broken stuff - you can see how it all works when it explodes

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JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

The membrane splits.. the DV on my car went the same way wet FARTY sound...... not good.

No way of repair. Use as good excuse to get that extra slice of bling with an external item.

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Le Latern Rouge...300ish bhp 13.8 1/4
more to come... gonna love track days.

Nice one guys. I'll have a look and let you know

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94 ST205

Silver and stuff

Dont really want to go and get a new shiny one, as im planning to sell the car after tax and MOT have been done. Does anyone know where I can buy a stock one from, and how much they are ? Ta muchly.

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94 ST205

Silver and stuff

Mine started making a moaning sound approaching 0psi vacuum. I just disconnected it assuming oil had got in to it or something from the chargecooler.

Soon to be replaced with an HKS effort.

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02 Mini Cooper Race Car
94 ST205 Import
92 ST185 Carlos Sainz
www.mcnab-racing.co.uk

I am glad I ran across this thread. My car makes a noise, that I liked the sound of but now I wonder if it could be a malfunction.

When I am in a low or no boost situation while cruising every now and then I hear a sound from the front of the car that sounds like a quiet version of the Tie Fighter from star wars.

I don't really want to get an expensive replacement if its the issue, but I am going to have to look into something.

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Coldiron (Cold - Iron)
1992 Celica Gt4 RC Conv. St205 swap

http://www.noritoy.com

If you only get one type of noise then something is definitely wrong

I get
<0psi lift-off ->Darth Vader breathing
<~4psi or slow lifts -> some crazy mexican with maraccas. Possibly being chased by a rattlesnake
<12psi -> The ptish of the dumpvalve accompanied by the mad maraccas mexican who still hasn't gotten away from that rattlesnake
1 bar+ -> The boowooowoowo of a garbage truck beings chased by maraccas mexican and enraged rattler

Not to mention the knife in the garbage disposal that is the twin plate, the screech of tyres and scream of passengers