boost gauge hooked up to compressor....only 3psi???
 

I've been having a boost leak/.....is what I thought,
I have only been boosting 2psi for the past 4 days,
today I hooked my boost gauge up to the vaccum nipple on the compressor

the highest I got to was 3psi in 4th gear @ WOT,
2nd,3rd gear only went to 2...2.5psi

anyone know whats up?

I have a td04h 13c / external wastegate /
I tried blocking the WG's dumptube & the same problem...
I have no mani leak or I would here it,
I have disconnected the WG from the turbo

any ideas??

Re: boost gauge hooked up to compressor....only 3psi???
 

huh???
I've been workin my ------ ass off everyday lookin for this leak & weldin like a motha fucker

whats that suppose to mean?

Re: boost gauge hooked up to compressor....only 3psi???
 

I have tried everything,,,

the boost gauge to the turbo should show all of the boost,
boost leaks afterwards would not matter!!!

& actually its pretty embarrassing to only have 2psi,

Re: boost gauge hooked up to compressor....only 3psi???
 

do what he said check for leaks with soap and water check couplers for pin holes ect.. is it internal wastegate or external?

Re: boost gauge hooked up to compressor....only 3psi???
 

Re: boost gauge hooked up to compressor....only 3psi???
 

Re: boost gauge hooked up to compressor....only 3psi???
 

do you have a 3psi spring in it?? that could be the problem

Re: boost gauge hooked up to compressor....only 3psi???
 

whats your exhaust situation....

Re: boost gauge hooked up to compressor....only 3psi???
 

thx for the replys guyz.
srry I didnt post up my exhaust & spring...

I have a 3.63 psi spring in it, ( But I have the WG disconnected &/or a boost controller turned all the way up)

I also have a 2 1/4 downpipe & 2" exhaust

I get a tad bit over 3psi when my boost gauge was reading from the turbo,
WG was disconnected

but that sounds right...
the springs at 3.63psi & I was just getting a little over 3psi,,,but the WG was not connected to anything,
when I shifted the gauge jumped up to 5psi & went back down...

Re: boost gauge hooked up to compressor....only 3psi???
 

You said you shifted the gauage and it changed to 5 psi. is the line kinked or is your guage broken. hook it up to a tire inflator.

Re: boost gauge hooked up to compressor....only 3psi???
 

when I shift from 3rd to 4th gear
the boost gauge will jump from 3psi to 5psi within a second & start back to 3psi as I'm WOT in 4th,
the line may be kinked.....(inserted through the firewall up under everything)...but its the hard plastic type line,,,when I installed it I made sure it didnt kink)

but it doesnt feel like I'm getting much boost at all....
I'm getting 1.5 to 2psi at the IM

3psi when I put the boost gauge to the compressor....

Re: boost gauge hooked up to compressor....only 3psi???
 

Take off the wastegate and put on a blockoff plate.

Get another boost gauge or datalog off the stock MAP sensor to see what's really going on, it sounds like your gauge is a little dicey.

Your exhaust isn't restrictive enough to choke it off that much, especially with a turbo that small.

Re: boost gauge hooked up to compressor....only 3psi???
 

^sweet!!!

tonight or tomorrow morning I'm blocking off the WG,
I dont hear it open,
but thats the only other thing I can think of is it,
I HAVE put my finger inside the wastgates piping & had black sue-it <~(however) on my finger...

it may be leaking,
I'll block it off asap!

I dont have another boost gauge thou,
I can double check to see if its kinked....but it probably isn't,
being that at idle it sits at 20 in vacuum..

Re: boost gauge hooked up to compressor....only 3psi???
 

try taking your air filter off for one run my was clogged so bad one time
that i couldn't make more than 3 psi. then you just have to look
for a boost leak in your pipes and couplers. but with a 3 psi spring in your wastegate
i would say your boost controller is not working.

Re: boost gauge hooked up to compressor....only 3psi???
 

I've tried the filter thing

Re: boost gauge hooked up to compressor....only 3psi???
 

Do you have the fire ring in if it's a Tial style?

Re: boost gauge hooked up to compressor....only 3psi???
 

i have the xs power WG,,,
I dunno,,,but I'ma look tomorrow

Re: boost gauge hooked up to compressor....only 3psi???
 

what kind a boost controller?
is the BOV leaking?

Re: boost gauge hooked up to compressor....only 3psi???
 

your wastegate is leaking by the sleeve. This happened to me that's why i bought the real deal tial. I couldnt find the leak at all it turns out its the wastegate.

Re: boost gauge hooked up to compressor....only 3psi???
 

i Have an ebay BC...
but shouldnt the boost gauge read crazy numbers if I connected the gauge to the turbo?
no matter what leaks I would have in the piping?

I believe its the WG & I'm going to check today

Re: boost gauge hooked up to compressor....only 3psi???
 

The pressure at the turbo will be domn from a boost leak too. The measured pressure in the system won't change that much based on where you measure it ( other than pressoure drop from bends, intercooler ect).

The ONLY way to effectively test for boost leaks is by pressurizing the system with an air compressor.

If you don't have one already build yourself one of these. http://vfaq.com/mods/ICtester.html

Re: boost gauge hooked up to compressor....only 3psi???
 

prolly no firing ring in the wastegate so its not sealing, thats why when you unhook you vac to the waste gate boost doesnt jump up higher, its leaking out from where the firing ring goes, thats my guess :4

Re: boost gauge hooked up to compressor....only 3psi???
 

I went out & removed the dumptube off of the WG,
I then blocked off the WG

I drove it with the boost gauge on the IM....I got 2psi

I then connected my boost gauge to the turbo,(compressor)
incase I had a boost leak,
the gauge read 3psi tops....

is the turbo shot? too much restriction?

I'm out of it?


......edit:
I can hear air blowing out,
the higher the rpm's go the air sound gets louder & louder,
I think its coming out of the bov,,,
but that wouldnt cause the boost reading from the compressor to only be 3psi.....??

Re: boost gauge hooked up to compressor....only 3psi???
 

sure sounds like you've got a major leak or bad turbo.
How's the play on the compressor? If the turbo is good, you can build a turbo leak tester for the intake side.

Re: boost gauge hooked up to compressor....only 3psi???
 

no...the turbo had very very little shaft play (side to side only)
I hear air coming out,
like its coming out of the intake of the turbo or the bov,

I bet the turbos leaking it somewhere....

how could I test the turbo if its leaking?

Re: boost gauge hooked up to compressor....only 3psi???
 

If you have a boost leak at any point in the piping, your guage will not register full boost, no matter where you hook the boost guage to. This is because air is leaking out somewhere preventing pressure from building. You can't have 8 psi where the turbo sits, and have 3 psi farther up the pipe.

Re: boost gauge hooked up to compressor....only 3psi???
 

^man!! that is sooo tight,
see I thought the turbo was gone!

I've been driving since last weekend like this & was about to give up on it today,
but tomorrow I'll start back on it...starting with the bov then the intercooler.

Re: boost gauge hooked up to compressor....only 3psi???
 

You said it yourself dipshit. I figured I'd clarify for your dumbass.

Re: boost gauge hooked up to compressor....only 3psi???
 

no....thats wrong,
I said that they wouldnt matter,
meaning the boost gauge should read like 5,10,15psi on the gauge
(because the boost hasnt started leaking,the gauge would be reading while its boosting)

but they do matter...
so the turbo wont build pressure
so at the IM would be the same psi as at the turbo,
(I didnt think it was like that)

Re: boost gauge hooked up to compressor....only 3psi???
 

ya cause it cant pressurize ( remember what psi stands for ) your turbo can be spinning at max efficiency and still only push a couple of pounds if you have a leak somewhere, what kind of bov do you have ? i pretty much said everything in your other thread but def dont give up on it, patience is key ;) it'll be worth it when your out boost grinin

Re: boost gauge hooked up to compressor....only 3psi???
 

its a hks bov
a friend just rolled up & has a rfl with the adapter pipe he'll sell me for 30$ so...
I put a bag over my hks & taped the crap out of it,
I'm about to do a quick drive & see what happens,
I told him I would give him a call tomorrow if it is leaking,

my g/f said "there ya go" as I was reading ur post,when you said "patience is key "....lol

Re: boost gauge hooked up to compressor....only 3psi???
 

she is just a women with a small brain of course she is going to agree with a man,
we (man) invented the wheel, and built the efile tower out of iron and bronze ;) stay classy
p.s. look for the whole in the bag after you go try it itll be about the size of a half dollar ;)

Re: boost gauge hooked up to compressor....only 3psi???
 

ok...I just went out there,gave it a drive,
I pulled the vacuum line on the hks & plugged it & completly covered the bov,
anyways,
1st time I rev'd it up,phssssss....
bov was working???

I understand that it may of put a hole in the bag....but the hks works without a vacuum supply?
sounded just the same,

I'm about to go out & look at the bag

Re: boost gauge hooked up to compressor....only 3psi???
 

no....the bag doesnt have a hole in it,
its sealed really tight,

when I'm building rpm's I hear: phssssssssssssssss (louder & louder) & then phssssss (just like a bov sound)
but theres no way in hell that the bov could have made that sound with it covered like that..///...


somthings fishy....

Re: boost gauge hooked up to compressor....only 3psi???
 

There's gotta be a boost leak somewhere. I bet it's around the BOV. or the BOV itself. Is there an adjustment nut or screw on that BOV? maybe it's just leaking boost out the port on it.

Re: boost gauge hooked up to compressor....only 3psi???
 

yes,theres an adjustment,
I'll go out & tighten it all the way down,
it sucks in air at idle...when I rev the motor it still sucks in air,
but I cant tell if its blowing air out when boost passes it...

the blow off valve cant work with it completly covered & no vacuum suppply,
I'll replace it with a pipe tomorrow if the adjustment doesnt work tonight

Re: boost gauge hooked up to compressor....only 3psi???
 

id loosen the bolt, tighting it down all the way is only need for higher boost applications, something is fuct up inside of it or around it, thats wierd that it would still make a sound without a vac line hooked up, you sure you werent hearing surge ?? sounds kinda like a ssqv :P you could also have a rip in a coupler or something and it looks good, you have to pull on the coupler to make it strecth to see if there are any pin holes i konw youve gone over it a hundred times, but im guessing its a bad bov or a leak somewhere, i wouldnt guess its the turbo but its def. possible

Re: boost gauge hooked up to compressor....only 3psi???
 

yea,,I went out & tightened it all the way down,covered it even more...
still blows off,
or somthings blowing off,
but I think the hissing/air noise is the wastegate open a little bit...i think...
but I blocked it today & the hissing/air noise was still there..


I'm running with the wastegate connected to the IM
nothings connected to the turbo

I do see black suiet inside the dumptube
(but its not getting hot)

I dont think its surge...I know what surge sounds like...
but this sounds like a greddy type bov.....the phssssssss


edit:
tomorrow,
I'll remove the bov altogether & just have a pipe & see if it still blows off....

Re: boost gauge hooked up to compressor....only 3psi???
 

did you do soap and water on all your charge pipes

Re: boost gauge hooked up to compressor....only 3psi???
 

no