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-   911 / 930 Turbo & Super Charging Forum (http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/)
-   -   ITB Question: What is the ideal length from intake valve to butterfly? (http://forums.pelicanparts.com/911-930-turbo-super-charging-forum/911204-itb-question-what-ideal-length-intake-valve-butterfly.html)

JakobM 04-23-2016 04:09 AM

did not mean to question the question, sorry if it came out that way

Ken911 04-26-2016 06:33 AM

Not sure if it was already mentioned in the posts above but you also make sure there are TWO vacuum connections on the manifold below the itb's. One for the brakes to go a common line that feeds the vacuum booster for the brakes. The other port will need to supply everything else like idle air bleed valve, vacuum signal for the boost controller, etc. Others feel free to chime in but I didn't want to put the brake booster in the same vacuum circuit with the idle air bleed valve. If that ever leaked or stuck open you have runaway throttle along with no brakes.

Ken911 04-26-2016 06:42 AM

here are a few pics of what I meant by two vacuum ports.

http://forums.pelicanparts.com/uploa...1461681687.jpg
http://forums.pelicanparts.com/uploa...1461681731.jpg
http://forums.pelicanparts.com/uploa...1461681751.jpg
http://forums.pelicanparts.com/uploa...1461681773.jpg

jpnovak 04-26-2016 06:59 AM

Ken, How do you get an intake nut on that one? Looks a little tight.

Great looking manifold adapters. I agree about the power brakes. I always run a separate line circuit.

Ken911 04-26-2016 07:04 AM

wasn't easy, had several like that the notch is larger than the nut stud the nut in the slot and then set the manifold over the stud and tightened it up. If I were to have a do over they would be about a half inch taller I think.

Ken911 04-26-2016 07:10 AM

this pic shows look at the top right one.

http://forums.pelicanparts.com/uploa...1461683427.jpg

Porsche 935 04-26-2016 08:15 AM

Do you have a common plenom you tie all the signal ports to?

Ken911 04-26-2016 08:37 AM

yes just haven't fabbed it up yet. One for the brakes and one for everything else.


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