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T77911S T77911S is offline
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 10,815
I just checked my boost CP. it is dropping about .9bar from WCP. WCP is 3.2 and boost is 2.3.
I would like another .2bar drop.

alan, what WUR do you have and has it been modified to be adjustable, I see you keep talking about changing the spring to adjust the drop.

I am curious about the spring you put in,
is it physically the same size? same height?
here is why I ask.
when the diaphragm drops down under boost, what is the limiting stop as far as how far it can drop down. if it is the compressed height of the spring and you put in a shorter spring then the boost CP could go lower. to a point, changing the spring compression wont change how much the CP drops because the boost pressure will eventually overcome the spring. what it will change is threshold setting or at what boost pressure the CP drops.
I think you said your boost CP is 1.6, that's pretty low.

I always checked my WOT fuel flow with the AFM all the way down. just trying to check the balance and more interested in repeatable readings.
I have also thought the overall travel of the sensor plate was not very much, especially based on the 911 plate travel
86 930 42kmiles [__] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD
88 BMW 325is 200K+ SOLD
05 BMW 330CI 130K:: [__] RUNNING: [__] NOT RUNNING:
08 VOLVO V70 190K:: [__] RUNNING: [__] NOT RUNNING:
Old 11-09-2017, 04:21 AM
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