14 replies to this topic

[gary1989owen]

hey all! iv been searching everywhere to find a seal kit for my DCOE weber 40 to be able to use it on a turbo , would i need a seal if it was a suck through setup? so the turbo sucks the air into the turbo then into the engine??

[Billys Bits]

i dont think you would but is it worth running suckthrough when so many blow throughs have can easily get 100+BHP

if its to have something different go over onto Turbo minis, there is a janespeed conversion

Edited by Billys Bits, 02 February 2011 - 07:11 PM.

[Turbo Phil]

If you go suck through you don't need to seal it as the carb only ever sees vacuum like a naturally aspirated engine.

[gary1989owen]

i dont think you would but is it worth running suckthrough when so many blow throughs have can easily get 100+BHP

if its to have something different go over onto Turbo minis, there is a janespeed conversion

yee iv seen a few examples of the blow throughs but after seeing the janspeed conversion i like the look of seeing the turbo on the left hand side of the engine bay, i just thought it would be a different setup to most peoples turbo and wondered if anybody knows the best way to connect the weber to the turbo?

[gary1989owen]

turbo phil you have the best information i could find on turbos!! have you thought about the setup? or know anybody whos done it execept the janespeed one? the hardest part would be to find the parts for the exhaust due to no1 sells a kit? or could a standard metro turbo exhaust be used ? maybe slightly altered?

[ibrooks]

Why have you jumped to exhaust from carb? The exhaust would be just the same as the "normal" turbocharged Mini setups.

As has been said suck through systems do not require the carb to be sealed.

You can run an un-sealed carb on a blow through setup though. Lotus did it running a pair of 40's (dell'ortos). The carbs sit in a sealed plenum chamber and the pressure from the turbo is applied to that - inside and outside of the carb see the same pressure so no issues with the carb blowing a fuel and air mixture out of the spindles and whatnot.

Iain

[gary1989owen]

Why have you jumped to exhaust from carb? The exhaust would be just the same as the "normal" turbocharged Mini setups.

As has been said suck through systems do not require the carb to be sealed.

You can run an un-sealed carb on a blow through setup though. Lotus did it running a pair of 40's (dell'ortos). The carbs sit in a sealed plenum chamber and the pressure from the turbo is applied to that - inside and outside of the carb see the same pressure so no issues with the carb blowing a fuel and air mixture out of the spindles and whatnot.

Iain

has any body made a sealed plenum chamber for dcoe's? iv searched the net and couldnt find anything.. or would it be best to make one? aslong as the weld is good enough it should it be okay?

[custodia]

Why have you jumped to exhaust from carb? The exhaust would be just the same as the "normal" turbocharged Mini setups.

As has been said suck through systems do not require the carb to be sealed.

You can run an un-sealed carb on a blow through setup though. Lotus did it running a pair of 40's (dell'ortos). The carbs sit in a sealed plenum chamber and the pressure from the turbo is applied to that - inside and outside of the carb see the same pressure so no issues with the carb blowing a fuel and air mixture out of the spindles and whatnot.

Iain

has any body made a sealed plenum chamber for dcoe's? iv searched the net and couldnt find anything.. or would it be best to make one? aslong as the weld is good enough it should it be okay?

i've been looking into this aswell. There used to be a plastic air filter available for the weber except it was sealed and had a pipe going into it at one side to allow an intake pipe.
Haven't seen one in a while but i know it's on the forum somewhere. Could be a good starting point.
If i can find it i will post it up for you.

[custodia]

http://www.theminifo...x...143215&st=0

near the bottom

tim

[dhende84]

This won't be an option for most for many reasons, but if you were to use the weber as a throttle body only with the fuel injected into the manifold after the turbo, then a lot of the problems would be solved.....maybe. Guess you'd need an MPi as a starting point, a man with a mapable ECU and a lap top. No guarantees it'd work, but the "basic" principles should work. All you've got to do now is get a large bank loan and the world is your Oyster!

[ibrooks]

http://www.theminifo...x...143215&st=0

near the bottom

tim

No good - the entire carb has to be enclosed.

Obviously Lotus made such a plenum but it was for a pair of twin sidedraughts. Any box that will hold the pressure will do. On one face holes are cut to match the flange where the carb bolts to the intake manifold and the box just works like a gasket. The biggest problem is getting the various pipes and linkages into the box without having air leaks. For the pipes bulkhead fittings can be used with short lengths of pipe from the side of the box to the carb inside. The accelerator cable linkage will likely need to be connected to a rod running through the box in a sealed bearing. Obviously you also need a big intake flange on the box somewhere to connect the pressure pipe from the turbo.

Iain

[Turbo Phil]

Which Lotus was this on ? The Esprit used a Dellorto 40, which is what the Janspeed Metro used. These were the sealed version so suitable for blow through use.

[ivanhoew]

You can run an un-sealed carb on a blow through setup though. Lotus did it running a pair of 40's (dell'ortos). The carbs sit in a sealed plenum chamber and the pressure from the turbo is applied to that - inside and outside of the carb see the same pressure so no issues with the carb blowing a fuel and air mixture out of the spindles and whatnot.

Iain

lotus

no carb in box Iain ,you wally

Edited by ivanhoew, 04 February 2011 - 08:01 AM.

[wolfie]

the lotus has an excellent plenum design, if only the mini had more space!

[Billys Bits]

put a 7 port head on so the webers are at the front, whack the turbo at the back and run the plenum thin!