Pressure relief valve??!!
Turbo Mini Forums

Hi all

Please can someone give me the correct name for the part i need to get the car sorted?

At the mo, the charger is kicking out 5PSI at idle which is stopping the fuel entering the engine from the carb. So there is some kind of valve thing that fits inline on the intake system to release this at idle (i think) but i'm not sure what the part is called. Neil has been off for a couple of weeks and i know before he went, this was the last major issue that needed resolving so to keep the project going i wanted to get the part ready for when he returned.

Even the part from the BINI setup would do but as i dont know what the thing is called i dont know what to be asking/looking for.

Any help would be great

Thanks guys

Johnny

feature=mhum

recirculating dump valve??

BOV or Blow Off Valve is what you want.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

I already have a dump valve fitted. If thats all i need, why is the charger putting out 5psi at idle? Im using the same pulley at crank end as the vmax kit so the ratio should still be the same

feature=mhum

Check out Janis build thread Jonny, I asked this very same question a few days ago.

he uses the bini valve, mounted on a custom made flange.

if it works fine on the bini, it'll work fine for you I'm sure:

http://new.minimania.com/web/Item/NME7609/InvDetail.cfm

It sounds like the spring in your DV is too strong to me. I've been told that using a DV is possible, but involves lots of messing around, as you need the tension just right so that it'll hold open on idle, but will close fully under boost.

Also, the charger making 5psi shouldn't stop fuel getting to the engine at all, as if it's plumbed in correctly with the rising rate FPR connected to the plenum, the fuel pressure will always be higher than the boost.

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

Well that is one thing we didnt have fitted when we ran it as it never arrived in the post so am guessing that will sort the fuel delivery issue. So if i get this valve thing i can do away with the dump valve?

feature=mhum

yes mate, if you get the bini blow off valve you should be able to do with the dump valve.

To be honest, I'm a little surprised slark expected the car to run without the AFPR, it's one of the fundemental reasons the fuelling works with a turbo carb under boost, and it can't ever be expected to work without it really!

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

well what had happened was on the last round of postal strikes a couple of weeks ago and the part was meant to be there. When i arrived, it wasnt so bombed it to BJ autos in god knows where as they said they had a regulaotor. Got it back to Slarks and it wasnt a rising rate one!! So we ran it up without it just to try and bed it in a little. Like i said it runs with the boost VTA but as soon as you tried to put it onto the plenum it cut the engine out. Im also running two fuel pumps

feature=mhum

edit: I see why you're running two pumps now.

Low pressure feeding a swirl pot right?

Edited by Prawn on 27th Oct, 2009.

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

Yep. And a high pressure one somewhere else!!

feature=mhum

So with help from you guys and my large capacity brain cell, i have concluded this is the part thats needed.

http://www.minispeed.co.uk/new_mini/index....oduct&id=detbpv

As its minispeed, if i order it now i will get in when im fifty or i will receive a parcel from them with half of it missing!!

feature=mhum

That's just the job, but you will need to move the control pipe to a point that sees vacuum at idle or cruise.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Would that be before or after the I/C or doesnt that matter?

feature=mhum

the pipe connected to the actuator on that valve should connect to exactly the same place as your DV take off does currently.


if you look at Jani's build thread, he's attached alittle filter to the end of his valve, as it's usually plumbed back into the inlet side of the charger on the bini to keep noise down.

OT: Jonny: what size is the ITG sock you've got over the end of your charger at the moment?

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

So that valve doest sit inline then? On that minimania thread you forward it showed in on the bibi bridging the pipes. So this mounts side on then and would VTA?
Its not hard to confuse me!!

feature=mhum

Oh and im not sure what size the sock is either lol

im a great help!

feature=mhum

the two pipes it's briding in those pics are the charge pipes, and the inlet side of the charger.

To fit the bini valve, you will need to have a take off welded onto your boost pipes with a flange made up to fit the bini valve. it will then vent to atmosphere yes

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

Just had a look on the one the guy with the white mini has done. Its alot clearer for me now!! lol

Looks like i better pay the welder man and get him to do some more!!!

feature=mhum

which white mini Jonny? do you mean the minus with the rear mounted alternator?

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

Yep. Thats the one. With the mastive I/C. Can see it alot more clearly on that. So i now sadly have to give minispeed some money and get that part ordered up!! :(

feature=mhum

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

We did get it running all plumbed in, not long enough to video it but long enough to fill my pants!! It sounded mental!! i think i will be to scared to drive it!! lol

feature=mhum

Hi Johnny and Prawn.
I think these help both of you..

http://www.youtube.com/user/nuukuus

I take that video just when I got it running...

And some extra images also. Here you have.

There you can see where from I take that pipe how to adjust that valve. After throotle body.

Jani

Attachments:

2.15mb

1.89mb

Edited by nuukuus on 27th Oct, 2009.

1399cc, Eaton M45 supercharger, N2O system, compression ratio 9.23:1, boost pressure 0,8bar/11.6psi.

http://www.garaget.org/?car=176816

wow, that sounds SO wierd Jani, I love it. it sounds nothing like a normal A series, the suck through kits don't seem to whine nearly as much as that does!

Jonnys appears to make a similar noise from the clip he posted too.

On overrun, or say cruising at high revs but very light throttle, can you hear the valve constantly venting as you drive along? it sounds very short and sharp in those clips

Mr. Prawn, the friendly Crustacean- slowly making steps towards forced induction.

Yes Johnnys keep similar noise!!

Yes I hear it all the time and also all orhers hear it when I drive it!!

It's work quite fast maybe sometime eaven too fast. Sometime boost comes too fast on...

Jani

Edited by nuukuus on 27th Oct, 2009.

1399cc, Eaton M45 supercharger, N2O system, compression ratio 9.23:1, boost pressure 0,8bar/11.6psi.

http://www.garaget.org/?car=176816