MFI with turbo help needed!

[Phoffren]

Hello, IŽll try this one too
starting to collect information before to test and blow engine

Have anyone made combination of early MFI with turbo without having factory super rare pump

So what is needed to do or what kind of boost effected equipment is need to adjust the rack related on barometric unit?

Will be were graefull of any information

Pekka from middle of snow (Finland)

[Flieger]

I think the factory basically made it so that the barometric cell "saw" the compressed air from the turbocharger instead of the atmosphere. They had a specific space cam in the pump too.

[Flieger]

Porsche 934.5 Brumos Racecar_ 098 by Max_911S_fahrer, on Flickr

Porsche 934.5 Brumos Racecar_ 105 by Max_911S_fahrer, on Flickr

[Phoffren]

So that was also mysolition thinking, but has anyone allready any formulas how much the movement of barometric axle should move when boost /10 psi is effected(0,1bar here in metric system)

I was thinking upwise sort of atmosphere/pressure actuator like in exhaust boost adjustment

But how much movenmet imm / 0,1bar of pressure this is the dark part of room

the special space cam ifromation also would be cood
otherwise I have just to test diffrent type of and try to find something

[Tippy]

Sounds like "Flieger" has it under control but you can also ask in the 930/911 turbo section.

[Flieger]

Originally Posted by Phoffren

So that was also mysolition thinking, but has anyone allready any formulas how much the movement of barometric axle should move when boost /10 psi is effected(0,1bar here in metric system)

I was thinking upwise sort of atmosphere/pressure actuator like in exhaust boost adjustment

But how much movenmet imm / 0,1bar of pressure this is the dark part of room

the special space cam ifromation also would be cood
otherwise I have just to test diffrent type of and try to find something

Sorry, I don't know. I would also suggest trying the Turbocharging section: 911 / 930 Turbo & Super Charging Forum - Pelican Parts Technical BBS

I guess you could just do trial and error. That is how the factory did it with the 917-10 turbo system. But that is kind of expensive.