Blocking the poppet valve
Turbo Mini Forums

Found a really easy way to block up the little poppet valve on the plenum chamber.

1) Take off the inlet pipe
2) remove valve and spring unit
3) Maskingtape over the hole
4) fill the recess (hole) from the rear with JB Weld using a tooth pick or similar
5) allow to set
6) remove tape.

Voila.... one plugged hole!

Woo hoo!

Sooperdooperturbocooperexpertengineering!

easy fix, let us know how ,long it holds for. it may pop out, but hopefully not

Team www.sheepspeed.com Racing

Ive tried pushing it through with my finger and it wont budge, plus there shouldnt really be that much vacuum on the plenum should there?

it wont blow out as the JB is larger than the hole.

Sooperdooperturbocooperexpertengineering!

same thing i done !!
I put a 10p piece inside the plenum; then filled the hole with JB liquid weld ....
AS is it only +'ve pressure cant see it ever letting go !!


there is a poppet on the butterfly as well that should be blocked ... aint done mine yet though

S

TurboLessTosser

it's usually easier to replace the butterfly for one without the poppet valve

Team www.sheepspeed.com Racing

Theres very little vacume (relativly) but there is a whole heap of boost!


alex

AlexF

jim i think your thinking of the popet valve on teh butterfly as opposed to the over boost valve on the plenum (as being discussed)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Naah, B12 just said


"there is a poppet on the butterfly as well that should be blocked "


so it is relevant

Sooperdooperturbocooperexpertengineering!

also there is the heat expansion and contraction. just hope it doesnt go through into the engine!

for the price of a new butterfly i wouldnt risk filling it! that could easily go through the engine as im not too sure how it could hold in the brass.

i havent sealed the one on the butterfly will i be ok?
Ive blocked the one on the plenum, and will be running a forge dump valve inline with the intercooler pipes, and my mbc will be set to 7psi

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

i blocked off the hole in the plenum with a bolt nut and washer, if your worried about it coming lose, you could use some loctite

A-series power! 1972|1310|T3 turbo|Omega pistons|Cantre main strap|Orange clutch diaphragm|AP race plate|Comp pressure plate|Lightened steel flywheel|13-row oil cooler|Vernier duplex timing gear|Phase 2 Piper cam|Green air filter|Hi boost carb needle/spring|2"Stainless exhaust|3"Play mini stainless rear box|Jack Knight s/c 4spd gearbox|Jack Knight s/c drop gears|Silicon coolant hoses|Lumenition HT leads|GAZ lowered height shocks all round|Steel flip-front|Rear safety devices cage|Group 5 arches|6x12 deep dish Minilites|Surf blue/Old english white|

ive also just used a nut/bolt and big washers to seal the plenum one, nothing on the butterfly though!

Previous Engine: 1040cc Morespeed engine, 1275 turbo head T2 Turbo Mirage Manifolds Megajolt
Previous engine: STD metro turbo, megajolt
Drives: 399bananahp (flywheel) Honda Civic Vtec b18c4 T28 Turbo 1968 Mini

Megajolt maps to download: http://www.jamesfawcett.co.uk/cms/index.ph...&gid=3&Itemid=3

I made an alloy plug then had it "tigged" in.

V Bling!

Free at work

Plus got the lathe at home so plugs are "no problem" !

May as well make the most of the facilities. Carbs getting cleaned in the ultrasonic baths tomorrow, ill take some before and after shots to see what happens. Supposed to be good.

I use an ultrasonic bath on a regular basis, it works like nothing else esp. on carbs and dizzies, these kind of complicated things will look brand new, wait and see iain's pics. just do not put fingers in the bath whilst its working. It will take all chalk of your bones.
it will take the chrome from your spanners.

I just soldered mine shut and ground the excess off using a die grinder leaving enough to keep it in place firmly

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

Hi,
Where's the butterfly ?

Shit Happen's

I blocked up the hole like said on here with the nut, bolt, washers.
I got a longer bolt, so if the nut desided to come off, then the nut wont make it's way into the enigine :) is there anywhere else that i should block up.
or is that job done ? thanks alot..
http://allyoucanupload.webshots.com/v/2003128536563147728

Shit Happen's

Use a nyloc nut, that will stop it coming loose.

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

I chucked the inlet pipe away and made my own without a valve in it. The inlet pointed in the right direction for an intercooler AND had a take-off for a dump valve.

Three birds - one stone

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

www.twin-turbo.co.uk

Mine is totally different to this. The Valve portion of the inlet to the plenum has been cut off, and a piece of sheet metal has been bolted back into the space left.

I'll post some pics if anyone wants to try it. It's never failed.

In the 13's at last!.. Just

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

So i thats it then ? i dont need to block anything else :) thanks

Shit Happen's

sorry to drag out an old post but i did the search and this came up.Whats the consequencies of not blocking this valve off?, reason i ask is i seem to be getting loads of air going into the engine at idle, can this be a fault with the poppet?, also, when its been run then restarted, i see a lot of whispy smoke emerge from around the plenumn, i hasten to add there are no leaks from any gaskets.

133.5 bhp 123 lb torque 116mph @6640rpm 9.5psi
Shakespear RWYB 14.995 91.83mph