So ..My gauge only shows -15 to -16 hg at idle ..Noramly people are running -20 hg. My car boost fine..runs fine ...Think I have a small leak possibly ? Anyone else have this problem ?

 

Does it read what it should when in boost?

 

Well ...That could also be a prob ...It reads 5 psi and kinda spikes to 8 but thats called for on a GReddy kit .

 

mine idles at 15-16 hg at idle. When im on the road and let off the gas, it goes to 20 hg. I thought that was kind of weird but not sure.

 

Same with mine ..

 

A leak would cause you to have a false vac reading but my d16y8 pulled a solid 20-22 hg and it still pulled that with a cracked ring land in the end too. It just blew out a nice cloud when i hit boost

 

Damn ...How many lbs were you pushing ? I def should be seeing -20 hg I dunno whats up

 

I was running 7psi with a greddy kit but i would spike anywhere from 9-10 psi trying to hold 7 psi to red line with my profec A. For fuel I just had a inline pump and a fmu. It took me about 30,000 miles to kill the sohc and about 5-6 150+ mph top speed runs.

 

Not bad .

 

I had the same problem with my boost gauge when i was running the greddy kit. I found out the problem was in the gauge itself. Where the hose was connecting to the back of the gauge i used some of that plumbers take to seal the connection. I after i did it fixed everything and i consistently read -20 on the gauge.

 

You mean teflon tape ?thanks

 

Remember that if you over tightin your fitings that your line is in it will kink the line and also cause it to leak.

 

Yeah I think Ive gt a kunk or something going wrong

 

well i'll let you know that your not alone + i'm running the greddy turbo 15g... Mine read 16 vac on idle, sometimes it would go down to 20. And the boost would only read 5psi when i floor it and 9psi in 4th gear. Also it can read about 9psi when its 3/4 throttle. not too sure if its a vac leak yet, really had no time to figure it out.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Im Rick James &raquo;</TD></TR><TR><TD CLASS="quote">You mean teflon tape ?thanks</TD></TR></TABLE>

Yes exactly..I had crushed at least two of those little ***** inbetween the boost gauge connection before I finally taped that damn thing up and fixed the problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dengar &raquo;</TD></TR><TR><TD CLASS="quote">

Yes exactly..I had crushed at least two of those little ***** inbetween the boost gauge connection before I finally taped that damn thing up and fixed the problem.</TD></TR></TABLE>

**** mine are crushing also. So I need telpon tape to make that stop ?

 

i am running no boost right now and only have 45K on my car and my vafcII reads about 11-12psi in vacume and about -13-14psi when i let off the gas while going. my car runs awesome and responds great, i dont think i have a vacume leak or anything.....any opinions?


Modified by smurfey002 at 3:00 AM 2/16/2004

 

Sounds like a vacuum leak lol. Epsecially is yoru not making any boost at all. Was the turbo kit used ? Everything put on right

 

thats the thing. the kit isnt on yet. i still have been told 20ish is normal for everyday healthy cars that dont have boost.

 

Yeah -20hg should be showing boost or n/a ....You might have a leaky gauge like we do. Tephlon tape it up and go from there. Could have a small crack in one of your hoses .

 

I think you are fine. I believe 15-21 is normal. For each 1000 feet you go up in elvation your vaccum increase by 1 hg. best way to test vaccum leak is take a propane tank with a hose hooked to it. Go around the engine where you think the leak is, with the propane and if there is a leak then the enigne rpm will change.

 

Or this .. http://www.slcstreetracing.com...t.asp

 

yea, but i dont have a gauge hooked up just yet (well anymoer that is) it was my vafc that was giving me the -10-12 readings. btw, i am reading in psi. you guys are too right?

 

We're reading in Hg

 

-10-12 psi of vacuum...no way. I bet it's inches of Hg.