JayDiem_k20_Dc5

Alright, so the other week I was running really good, Boosting up to 15lbs and loving every bit of it. Now this week it's only boosting like a pound to 2 lbs. The BOV is letting off when I let off the gas, All the IC piping is all on and tight, I have a manual boost controller and tried fooling around with that but nothing. All the lines from the wastegate seem to be right. There's a small crack in the manifold but it was there when I was boosting 15lbs a few weeks ago. But everytime I get up to around 2lbs the wastegate opens right up and lets all the pressure out which is pissing me off. I do have the smallest setting spring in but its good for at least 7 lbs.

Turbo specs.

Garrett T3
.42 a/r
.48 hot

motor
B18b1

I'm kinda stumped on why I can't get anything over 2lbs. Anyone might know why my wastegate is opening a little premature?

95jeremie

wel it sounds fucked up. have you tryed a diffrent spring/WG? i'm still a noob at boost building my kit now but... damn bump for some help

JayDiem_k20_Dc5

yea, I've tried 3 different springs and all seem to be doing the same thing. Maybe a bad wastegate?

Running925

sounds like your wastegate gave up on you

but it's kinda hard to tell with the info given.. the crack in your mani definatly isn't helping spool time tho.

JayDiem_k20_Dc5

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Running925 &raquo;</TD></TR><TR><TD CLASS="quote">sounds like your wastegate gave up on you

but it's kinda hard to tell with the info given.. the crack in your mani definatly isn't helping spool time tho.</TD></TR></TABLE>

yea def not at all, but didnt really matter much in the past, Will weld that up sometime soon and see if that helps. I guess I'll play around with the wastegate today and see if it'll make a difference. It's just weird cuz one day I was boosting a good 15 lbs then the next I wanted to put in a lower spring so I did and it just ran like garbage, not to mention that the wastegate hose wasn't routed back into the cold side of the turbo just yet. Do you think I should just run the setup without that line connected and see if it's the wastegate that **** the bed?

btw, the dumptube is atmospheric and when I do arrive at 2 lbs it opens right up.

adseguy

If you can hear the wastegate opening up I'd say the Diaphram ripped . That sucks

JayDiem_k20_Dc5

any way of fixing that or am I better off buying a new wastegate?

JayDiem_k20_Dc5

bump for a solution

VTteg

iTrader: (1)

Try removing the MBC from the system.

adseguy

Well first inspect it. Open up the wastegate really look at the diaphram. If it's torn call up the maker and ask for a price or look on e-bay. I don't see a lot of diaphrams for sale though

JayDiem_k20_Dc5

thanks guys

nikolai.

make sure you havent developed a boost leak. even if your WG was opened all the time it would still prolly make more then 1.5 psi.

Stop the Beast

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nikolai. &raquo;</TD></TR><TR><TD CLASS="quote">make sure you havent developed a boost leak. even if your WG was opened all the time it would still prolly make more then 1.5 psi.</TD></TR></TABLE>

It's hard to make much noticable boost if the wastegate is always open. Check out the diaphram.

JayDiem_k20_Dc5

alright, I guess I'm gonna go check the diaphram for rips. The only boost leak I could imagine is the one in the manifold but again, wasnt a major problem from before

notoriousB

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nikolai. &raquo;</TD></TR><TR><TD CLASS="quote">make sure you havent developed a boost leak. </TD></TR></TABLE>

R@mon

guys if he has a boost leak there wouldnt be enough pressure in the lines to make the wastegate open, my first guess would be the wastegate itself.

JayDiem_k20_Dc5

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R@mon &raquo;</TD></TR><TR><TD CLASS="quote">guys if he has a boost leak there wouldnt be enough pressure in the lines to make the wastegate open, my first guess would be the wastegate itself. </TD></TR></TABLE>

that and my BOV goes off so obviously it's boosting somewhat

Fitti

if it's a delta gate throw it away and buy a different one! My vote is for TiAL

JayDiem_k20_Dc5

nope, it's a Tial

notoriousB

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by R@mon &raquo;</TD></TR><TR><TD CLASS="quote">guys if he has a boost leak there wouldnt be enough pressure in the lines to make the wastegate open</TD></TR></TABLE>
if the wastegate pressure signal is referenced off of the compressor housing there certainly would be enough pressure to open the wg.

nasteboyii

first off like someone else said if its a deltagate get rid of it, POS, tial is the only way to go

having a manifold leak can cause loss of boost,

my buddy has a deltagate some days it boosts 7 some 2-3, manifold had small leak, fixed it, boosted good, then just stops for a pull or 2 then it works fine, deltagate is a pos, i know it needs to be changed but he is poor

good luck
d

JayDiem_k20_Dc5

so you think it could be that small crack in the manifold that might cause the loss of boost. I mean I see my gauge and it vacumes around 25-30 then when I boost it goes to 0 then slightly in between 0-2lbs then blows off when I let off the gas and the BOV is loud.

R@mon

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by notoriousB &raquo;</TD></TR><TR><TD CLASS="quote">if the wastegate pressure signal is referenced off of the compressor housing there certainly would be enough pressure to open the wg.</TD></TR></TABLE>

so you mean to say that even if there is a blown off pipe coupler or other huge leak there will still be enough pressure in the housing to open a wastegate not to mention earlier than normal and still have enough pressure to hear the bov when it opens?

JayDiem_k20_Dc5

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

so you mean to say that even if there is a blown off pipe coupler or other huge leak there will still be enough pressure in the housing to open a wastegate not to mention earlier than normal and still have enough pressure to hear the bov when it opens?</TD></TR></TABLE>

yea that would be werid cuz it's still getting pressure throughout the piping to release the BOV and I do notice a small power gain even if its near 2 lbs

R@mon

just double check the whole system. go over each coupling and make sure its not split or cracked, if nothing shows up then check your wastegate and also make sure the crack on the manifold didnt get bigger....