So i got this brand new tial wastegate 38mm with a .7bar spring = 10.15psi = Big Yellow spring, i've just finally finished up on my break in stage and wanted to test the new wastegate out, come to figure out im only boosting 8.5psi...... can anybody help me, why am i only getting this much and not a full 10.15psi of boost??? dont worry, im high boost ready equipped... please chime in tial wastegate owners!!!

-dara

 

Real quick, where did you see that you were only getting 8.5 psi? Gauge, logger? I kind of had the same thing happen to me with a 1 bar spring (14 psi), gauge was telling me only about 12 psi. Looked at the logger, and it was showing me 1 bar.

Jason

 

where do you have the vac hooked up for the wg? the turbo or the im? cause that can play a role.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SFWD 1934 &raquo;</TD></TR><TR><TD CLASS="quote">Real quick, where did you see that you were only getting 8.5 psi? Gauge, logger? I kind of had the same thing happen to me with a 1 bar spring (14 psi), gauge was telling me only about 12 psi. Looked at the logger, and it was showing me 1 bar.

Jason</TD></TR></TABLE>

from my boost gauge is it because its a autometer?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostfedEK4 &raquo;</TD></TR><TR><TD CLASS="quote">where do you have the vac hooked up for the wg? the turbo or the im? cause that can play a role.</TD></TR></TABLE>

I had the vac hooked up to the turbo it only pushed 6.5-7 psi of boost, then i had the vac switched around from the wastegate to the IM then it went to 8.5 psi, with the vac port from the turbo compressor blocked off

 

I also have an autometer boost gauge. Not saying that they are bad or anything. Do you have an EMS that you can see the logging of the PSI?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SFWD 1934 &raquo;</TD></TR><TR><TD CLASS="quote">I also have an autometer boost gauge. Not saying that they are bad or anything. Do you have an EMS that you can see the logging of the PSI?</TD></TR></TABLE>

well, im running uberdata with a basemape which is set at 9psi... if thats what you are talking about?

 

I wouldn't trust the gauge. As long as the vac line is hooked up correctly, there are no boost leaks, and it's the right spring it should be dead on.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 5thgencivic &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't trust the gauge. As long as the vac line is hooked up correctly and it's the right spring it should be dead on. </TD></TR></TABLE>

well, i know how a 9.psi feels like, and i know that 8.5psi is what im feeling and its a bit lower than 9psi when i tested it so i think my gauge is accurate

 

Its called pressure drop across your piping and intercooler.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted hybrid &raquo;</TD></TR><TR><TD CLASS="quote">Its called pressure drop across your piping and intercooler. </TD></TR></TABLE>
he has the vac line hooked to the intake manifold so that shouldn't make a difference.

I am having the same problem as him guys. I stepped up from an 8psi spring to a 10psi spring and probably only gained .5psi according to the gauge. It definintly didn't feel much faster either.

 

No,<U> BOOSTED HYBRID</U> is right ask any intercooler/turbo company about a pressure drop through the intercooler and pipes. He isn't saying that there is a leak. Normal is 2-3 psi max. It's a little thing called flow!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">he has the vac line hooked to the intake manifold so that shouldn't make a difference.
</TD></TR></TABLE>

anybody read? he and mshue said the wg is getting vac from the intake mani after the pressure drop

 

I'm having the same problem. 1 bar spring in the tail WG but only showing like 10 psi on the boost gauge.

 

what are your turbo and engine specs?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dennis &raquo;</TD></TR><TR><TD CLASS="quote">what are your turbo and engine specs?</TD></TR></TABLE>

d16z6 head:
resurfaced and milled 0.040 thous,
and hot tanked, with skunk2 camgear,
Skunk2 intake manifold with b16 TB
Profab intake manifold insulated gasket

d16z6 block:
eagle rods,
suzuki vitara pistons
ACL bearings /rods/mains and thrust washer
Hastings piston rings
micropolished and balanced crank

ACT pressure plate
Clutchnet 3 puck clutch unsprung
ACT 8lbs prolite flywheel
stock d16z6 tranny

revhard turbo mani
turbonetics t3 .57trim .83 exh
custom 3" downpipe to 2.5"
Tial wastegate red top with a .7bar spring
sard BOV
fmic
resistor box
dsm 450cc's blue top blueprinted and cleaned by RC
and also Uberdata P28 ecu

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skank_aSS_Dara &raquo;</TD></TR><TR><TD CLASS="quote">
turbonetics t3 .57trim .83 exh
</TD></TR></TABLE>

That's probably a contributing factor right there. That's a pretty big snail. Is it a t3/t4 or straight t3? You sure you don't mean .82 turbine housing? Anyway, I have a t3/t4 60trim, stage 3, .82 and I have similar issues. I'll eventually be buying a .63 housing. This is all on a f22 though.

 

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

That's probably a contributing factor right there. That's a pretty big snail. Is it a t3/t4 or straight t3? You sure you don't mean .82 turbine housing? Anyway, I have a t3/t4 60trim, stage 3, .82 and I have similar issues. I'll eventually be buying a .63 housing. This is all on a f22 though.</TD></TR></TABLE>

well i dont know much about this turbo specs, but im pretty sure the hot side turbine housing is a .83, but im assuming also that this turbo can be too huge, but unless someone is willing to trade turbo's with me plus cash on their side depending on what kinf od turbo it is...

-dara

 

Does it take a while to reach your max boost? I'd be really interested in seeing what would happen if you put a .63 turbine housing on there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dennis &raquo;</TD></TR><TR><TD CLASS="quote">Does it take a while to reach your max boost? I'd be really interested in seeing what would happen if you put a .63 turbine housing on there.</TD></TR></TABLE>

yes and i cry about it so much

 

i had a .42/.48 before on 9psi and saleen's and SVT's couldnt see me anymore.... but i had too much fun without a oil restrictor and turned up to 11psi the seals went out

 

Well I think you just don't have enough steam to drive that large turbo. You can get new exhaust housings for less then $150 I think, or cheaper if you luck out on a deal. You're going to need to know what stage wheel you're running though.

 

Well how about i just put my turbo up for sale/trade then!!!

 

What about me though? I am running a super small wrx turbo and I have the same problem as Dara. With my mbc hooked up I am able to boost 10psi instantly,but then after 5k rpms the boost drops back to 8.5psi. Without the mbc it just holds at 8.5psi.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">What about me though? I am running a super small wrx turbo and I have the same problem as Dara. With my mbc hooked up I am able to boost 10psi instantly,but then after 5k rpms the boost drops back to 8.5psi. Without the mbc it just holds at 8.5psi. </TD></TR></TABLE>

yeah somebody help him out too, i was reading about that, i guess i kinda figured out my solutions, but i'd like this thread to continue on until sohc_mshue is figured out also