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Home > Help Needed / General Tech Chat > Blow off or Dump valve

m30

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Hi chaps,

i'm currently fabing up my inlet manifold for my M45 supercharger, and was wondering if anyone uses and can point me towards a Blow off or Dump valve that I could use?

I'm thinking it might be best to fit one to stop any sort of spit back from damaging the supercharger, or am i over thinking things?

I'll be running a suck through set up, if that makes any difference

Stu

Edited by m30 on 4th Dec, 2014.


apbellamy

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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

A suck trough setup with a dump valve will turn your engine bay into a grenade...

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


BENROSS

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Resident Cylinder Head Modifier

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

a dump valve wont work on a suck through setup.

having said that a suck throug set up is old hat and totaly crap! IMO, will give you loads of ball ache and no hair.

i would totaly forget this idea and go turbo my friend much easier and sooooooooo much better






m30

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Member #: 10415
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On 4th Dec, 2014 apbellamy said:
A suck trough setup with a dump valve will turn your engine bay into a grenade...


Why would that be then?

As I said, I'm looking at fitting a simple safety valve to protect the supercharger in the event of spitting back, not to get shut of any excess boost.

I'm new to all this caper, so I'm starting at the simple end and may work my way up to something else later, but for now its M45 with the carb bolted directly to the end of it to help keep temps down.

Stu


jonny f

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Dorking

Suck through means you'll have fuel where ever you have boost and even before you reach the charger, releasing that to atmosphere in a vapor is going to be nasty.

Edited by jonny f on 5th Dec, 2014.


m30

19 Posts
Member #: 10415
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On 5th Dec, 2014 jonny f said:
Suck through means you'll have fuel where ever you have boost and even before you reach the charger, releasing that to atmosphere in a vapor is going to be nasty.


I know the difference between suck and blow through.

I'm only thinking of a valve that will vent any high pressure in the inlet manifold in the event of a back fire or spitting back, this in itself will burn off any mixture, and the boost i'm looking at running would not open the valve. A lot of the vintage supercharged motors run them, and I had one on an lpg car a few years back

Maybe its not something thats not needed when running belt drive


Joe C

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Carlos Fandango

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this is what he means,




On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



m30

19 Posts
Member #: 10415
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the one on the front of the manifold seems to be the right type of thing, but it would be easier if it was a stand alone unit. Whats the black one on the top doing? controlling max boost?

stu


jonny f

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Dorking

Oh! Makes sense!

Sorry.


Carlzilla

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What's that off joe? Looks very well designed.

On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper

On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!!

17.213 @ 71mph, 64bhp n/a (Old Engine)

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