spring inside plenum chamber - help needed
Turbo Mini Forums

Hi all

think i found the problem with as i took the plenum chamber apart the gasket was abit shoddy, replacing it no but noticed the spring thats inside the chamber and when i put it back together the first time i placed it in as could find no way of fixing it in place

anyone got any tips on what it does and how to fit it back together properly

cheers all

Its a pressure dump valve. All it does is relieves excess pressure (above 10psi I think), basically to prevent the engine from being over boosted.

Most people block them up tbh. I used a metal bar cut to the right length to hold the cup seal in place.

The spring should fit into the recess, then on the other end should be a rubber/plastic cup that seals up against the seat on the main body of plenum...if that makes any sense? lol

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1/4mile in 13.2sec @ 111 terminal on 15psi

cool, cheers for the quick reply

just so i know to make sure its the right way round, the black cap sits toward the front of the car and the spring rests on the back wall (bulkhead end)

or is it ment to be the other way round

as i've got it all apart at the moment

option 1:



or option 2:

Option 1 looks to be the right way around

Option 1

However, if you are using a dump valve you are better blocking it off.

Edited by Kean on 30th Jun, 2011.

Yep option 1.

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1/4mile in 13.2sec @ 111 terminal on 15psi

thanks guys, i know it was a really stupid beginners question but its done wonders for the mini, took it out for a spin and have felt it boost like that for a while

thanks again

I vote option D.

Is option D the answer to Question X?

option 1 if you have a dump valve replace the spring with 5p's untill it seals tight i think it costs about 35p lol

Yes i moved to the darkside

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