dump valve

[markg9926]

Anyone know the difference between single piston dump valve and double piston dump valve

 

[ElDopesta]

A double piston usually diverts some pressure to the intake and some into the atmosphere.

What do you have on the car at the moment???

El

 

[sponners]

El your getting mixed up with a dual port mate

I think the single piston is idealy suited to a map based car and a dual piston is for maf based.

 

[ElDopesta]

Whaaaaat!!!

Sponners buddy, you got me on this one. I was thinking of the dual splitter!!!

Never mind, at least you here to set the record straight.

Where's the bay pics kiddo????

El

 

[sponners]

I had a look and only have a crappy shot without all the bay in, your not missing much!

 

[ElDopesta]

Your too modest matey!!!

El

 

[aaronmahler]

rite c if u can help me, i bought a baileys dump valve for my evo and for some reason it either wont dump or wen it does it sqeals a little.

but wen u give it a boot full it dumps harder than fat man on the toilet!! any ideas???

anuva thing i noticed is that it looked like the dump valve was opening slightly wen pressed throttle???

 

[sponners]

strip it down and give it a good clean and spray a little wd in it (might help)

 

[ElDopesta]

Does it have an adjuster on the vacuum pipe connection??? If it does then turn it down, that will tighten the spring which in turn will help hold the pressure in. Follow Sponners advice and at the same time check the spring, it my well be worn buddy.

I have noticed on many occasions that the Baileys valves are failure prone, I do not recommend these to any one.

El

 

[aaronmahler]

how do the dump valves work? coz i noticed it opening when throttle was applied, i thought that they only opened when the throttle was closed???

also wot ype of dump valve u recomend??

 

[ElDopesta]

The spring mechanism on yours must be weak, that is probably why you noticed it opening.

Take it off, push the piston in and cover the vacuum nipple with your thumb, the piston should not push down until you release your thumb. If it does release before that then you have a weak valve on your hands.

Try that & we can take it from there buddy.

El

 

[aaronmahler]

rite ive tried wot u sed and the bottom pops down then wen i take my thumb off vacuum it makes a pop sound, does this mean the valve is weak?? also would it make a difference wot spring it has in it coz i think wiv baileys u can buy different spring strengths?? if so wot strength spring would i need??

also dont think that it can be adjusted, i think the top does adjust but wen tried it made no difference

 

[ElDopesta]

Take the spring out buddy and give it a pull to stretch it about an inch longer.

Stick it back into the valve and then slap it on the car. Take it for a quick cruise and then let us know how you got on. If it is better then before but still not good enough then you are better off getting another dump valve as the Baileys are just a waste of money as far as I am concerned. Either way buddy, let me know how you got on right here and I will advise further.

El

 

[aaronmahler]

wot dump valve would u recommend bearing in mind im a bit skint at mo! lol, oh and on anuva note got a standard crank pulley from camskill £110 was here next day fitted! brilliant! also bought a manifold from my favourite place
MITSUBISHI EVO 1 2 3 TURBO EXHAUST Manifold on eBay (end time 20-May-10 12:43:47 BST)

i love ebay lol

 

[ElDopesta]

I recommend that you leave the original n for now buddy.

As for the manifold, I hope it lasts buddy.

El

 

[aaronmahler]

well jus had a quick look at old manifold and looks like its leaking from gasket and the manifold is not cracked or anythin!

 

[ElDopesta]

Are you talking about the original one or the one you just bought???

If the original one is the one you are talking about then change the gasket and just do what I advised you in the PM buddy.

El

 

[aaronmahler]

im talkin bout original one, which is leakin like a mofo!! lol

 

[ElDopesta]

Replace the gasket and stick with it buddy.

El