Flat Fan plumbing

[porsche 930twin]

Hi all just need to know with EFI do I need to plumb and if so where should I run vacuum for brakes.... and on the boost side what should I allow for eg... boost gauge MAP any others ..
Made up all new throttle bodies and I need to know how to plumb it up before install.. will post pictures soon.This picture is with the old throttles..Paul

[Porsche 935]

I have reference ports for MAT sensor, wastegates, boost guage, and alcohol injection in boost plenums. Then all cylinders are equalized through central plenum from 962. From this I reference fuel regulator and Map sensor under throttle plates.

[porsche 930twin]

Thanks for the reply.. just to clear things up so MAP, boost gauge, fuel pressure reg.need to go into the top plenum and vacuum for brake booster will need to go under butterfies ... does this need to go to one throttle body or all 6 little confused.. does anyone have a diagram... this engine is for a street car only..Paul

[JJ 911SC]

Paul,

The brake booster connection is only on one side, in my case in the adapter between the intake port and the butterfly body in line with cylinder #2.

For the MAP, its 6 hoses (1 per throttle) into the MAP Sensor (black hoses with red ends).

[porsche 930twin]

thanks for the pictures they sure help.. will these 6 tubes on the throttles become pressurized on boost...and fuel wont enter them being below the injectors.. thanks Paul

[JJ 911SC]

Originally Posted by porsche 930twin

... will these 6 tubes on the throttles become pressurized on boost...and fuel wont enter them being below the injectors.. thanks Paul

The tubes are above the injectors and this is a NA so no boost.

[Speedy Squirrel]

Uh, no. As pictured this is not the classic 935 setup. This one has two big throttles, one on each bank. In this case you only need a Tee fitting connecting both banks to one MAP sensor.

The plenums should be connected together with a cross-over damping tube to reduce the pulsation in the plenums. If this is the case, you can take the brake vacuum off the left side plenum and route to the standard 911 location. Alternately, you can buy an electric vacuum pump and mount that under the front hood, near the master cylinder.

Super nice NA EFI install.

Originally Posted by JJ 911SC

Paul,

The brake booster connection is only on one side, in my case in the adapter between the intake port and the butterfly body in line with cylinder #2.

For the MAP, its 6 hoses (1 per throttle) into the MAP Sensor (black hoses with red ends).

[JJ 911SC]

Originally Posted by Speedy Squirrel

...Super nice NA EFI install.

Thanks S.S.

Soon I'll be talking about Boost too. I just got my hand on a Supercharger that will double the HP ~425

Might install it next winter. Super Charger ID required

[jpnovak]

I love the build.

Where did you get the TB castings? Those are great.