Is there another way of connecting up an actuator?
Turbo Mini Forums

does it matter where the actuator gets it reading from?

I currently have it connected like this...



The two coloured pipes are the bleed valve. one goes to the actuator, and the other one goes to the "plenum pressure". The plenum pressure though is also T pieced to the fuel pressure regulator and daves "tee piece trick".

My problem is still there, if i bleed off even the slightest ammount of air, the engine cuts out when coming on boost. Also if you try drive it on boost for more than arround 10 seconds it tries to cut out and the fuel pressure suddenly dissapears. I dont mean driving it hard or anything like that, i havent pushed it, the turbo kicks in very early though, and going up hills is impossible unless theyre short ones or it tries to cut out.

Im thinking that its because the actuator is taking air and making the fuel regulator give out less fuel? is that possible?

I thought my fueling problems were all sorted, its not running lean and there doesnt seem to be any other problems with it.

Is it possible to connect the bleed valve up by connecting one pipe to the inlet manifold/vacuum takeoff and one pipe to the actuator? Wil it damage it if it sees vacuum?

thankyou!!

ps heres a pic from the test today!!

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

maybe the fuel pump is goosed? whatever happens to that signal you should always see 3.5psi.

forgot to add, when coming back to idle.

you implied that you lost all pressure.

What fuel tank are you using?

wheres that red pipe going dude? isn't that pipe next to the fuel inlet usually blocked off to stop it dying on boost?

Edited by Anton on 10th Jul, 2006.

hi im using an MPI tank, the red pipe goes to one leg of the bleed valve (at the moment its connected straight into the blue pipe inside.)

iain when i let go of the throttle when it starts to splutter it goes back to idle then idles normal again

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

that'll be the problem then dude. The union you've got the red pipe on is for the anti-run on valve, as soon as you try to use your bleed valve your opening it it to atmosphere which means that it doesn't get fuel and tries to cut out.

Your bleed valve needs to go between your plenum and actuator (remember you saying you haven't got a nipple on your turbo so i guess your boost signal comes from the plenum)
You can't use the T piece trick with your setup as you'll be venting the float chamber which means no fuel on boost.

just pipe it up like this and see how it goes.

Hi bud thanks for that and drawing it, but it doesnt run without daves T piece trick normally, but i will try it without the T piece trick but with the balance pipe and see what happens.

Will rebuilding my carb sort it out so i dont need the t piece trick?

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

Ahhhh......... Nicks most excellent artistry comes into play once more.......

I can see Tony hart turning in his grave........

is he dead?

This just cannot work. I can't be arsed to explain why. Think about what you are trying to achieve by bleeding signal from the actuator line. Then think about what this drop in pressure will do to the fuel reg.

You need two take offs FULL STOP. Plumb another take off into your setup and be done with it.

yeah i was just thinking the same thing, bleeding the signal thats also connected to the reg would be dropping the fuel pressure wouldn't it?

definately would a be lot neater/easier to just have another take off on the plenum.