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Home > Help Needed / General Tech Chat > blow off?

beestje007

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Member #: 1230
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31st Aug, 2006 at 09:54:34am

In the chamber where the carb sucks his air from the turbo, there is another liitle hole thats connect with wat? is that a blow off, dump valve? WHats opening the dump valve and how? what do they use to open it when the pressure is high enough? thanks

Dangerous

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2521 Posts
Member #: 417
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Swindon

31st Aug, 2006 at 10:37:27am

connects to the fuel pressure regulator


Metro turbo weekend driver,Mini turbo in the making again!



BENROSS

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9812 Posts
Member #: 332
Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

31st Aug, 2006 at 06:07:25pm

the hole which dangerous has mentioned is around 4mm diameter,....... its as he says

the holes in the plenum chamber approx 9mm with the rubber seal, seat and spring is the OEM dump valve, this lifts off its seat around 9psi ...ish

Most people blank this off by running a 3/8" BSP tap straight down the hole and blank this off with a hexagon tapered blank! With a shade of thread tape or thread sealer.

Also you could fit a stronger spring in there so it does not open or some pack it with 5p coins





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