How much vacuum do you read at idle?
#2
Rx-hippie
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Definitly if this is stock ports, sounds like a vac leak or really low compression.
My current Vac is 18-20in/hg at 800-850 rpms.. 69k on the motor.
My other motor with a HUGE street port pulls about 16in/hg at 1.1krpm idle with about 3k miles.
My current Vac is 18-20in/hg at 800-850 rpms.. 69k on the motor.
My other motor with a HUGE street port pulls about 16in/hg at 1.1krpm idle with about 3k miles.
#4
Just went for a ride and I am reading 22inHG when decelerating. Is this good? I went and sprayed some ether evrywhere and did not find any vac leaks. Motor has 7k on rebuild with used housings. Last comp test was 87psi on front and rear. The builder told me that 90psi is what 13bt's should be?
#6
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My stock port S5 TII runs between 15-18. Emissions are removed the TB mod performed so it idles anwhere between 1100 and 750 haha. The throttle plates are always opened a bit to hold the idle
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#11
Haven't we ALL heard this
750 rpm idle with a streetport and turbo 12-14" of HG.
You don't test for vacuum leaks with flamable spray...gonna be hard to find it. you should test by pressurizing the intake system with the engine off and listen for a hiss.
You don't test for vacuum leaks with flamable spray...gonna be hard to find it. you should test by pressurizing the intake system with the engine off and listen for a hiss.
#13
spending too much money..
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Originally Posted by NMJ87T2
Just went for a ride and I am reading 22inHG when decelerating. Is this good? I went and sprayed some ether evrywhere and did not find any vac leaks. Motor has 7k on rebuild with used housings. Last comp test was 87psi on front and rear. The builder told me that 90psi is what 13bt's should be?
#14
Originally Posted by NMJ87T2
Just went for a ride and I am reading 22inHG when decelerating. Is this good? I went and sprayed some ether evrywhere and did not find any vac leaks. Motor has 7k on rebuild with used housings. Last comp test was 87psi on front and rear. The builder told me that 90psi is what 13bt's should be?
I have already done this.
#16
I am aware of that ,but I have not used a different comp tester to have an accurate comparison. I know that some will give different readings. 87 on this one could be 107 on another. The car runs good, idles good, and I do not have any kind of hot starting issues. who knows?
#19
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Originally Posted by NMJ87T2
who has a conversion rate from bar to inHG?
Intake would colapse in on itself... the universe would be sucked into the rotary..
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