1075 cis component

[47silver]

what does item#20 do? This shows it as a component on my 75. My car does not have one and i am wondering what function it performs. Since it is a attached to the throttle i suspect that it increase fuel pressure as the throttle plate opens.
does it help with acceleration or is it a device best left removed?
thanks

[75 911s]

The throttle position control pressure regulator, it presses onto the throttle shaft. I believe 74 and 75 had them. Mine was missing when I got the car. Search throttle control regulator.

[Bob Kontak]

See boyt911sc's posts

1975 Testing Throttle Valve Control Pressure Regulator, and 008 WUR

[HaroldMHedge]

Here's another factory explanation taken from 1973.5 CIS Thrtottle Valve valve?

Originally Posted by Jim Sims

A couple of scans from the 1973.5 CIS training brochure.




"Could this throttle valve impede the cold starting?"
Yes.

[HaroldMHedge]

See page 10 & 11 of 73 911T CIS Print for an easy to read page (PDF page 11 & 12).

73 911T CIS Print

Thanks to Jims Basement Workshop

[47silver]

thanks for the replies, i ll try to do a drawing of how mine is piped,, i

[boyt911sc]

Originally Posted by 47silver

what does item#20 do? This shows it as a component on my 75. My car does not have one and i am wondering what function it performs. Since it is a attached to the throttle i suspect that it increase fuel pressure as the throttle plate opens.
does it help with acceleration or is it a device best left removed?
thanks

Silver,

Could you post a picture of the WUR (#28) installed on your engine? Better still do you have a -009 or -129? Keep us posted. Thanks.

Tony

[47silver]

will post a picture, car is not accessible tonight