well i am now boosting 13 psi but it tends to drop instantly to about 10psi and holds there throughout my power band...ideas? thanks a lot

 

ttt

 

more info please, motor? turbo? wg? bc?

 

sorry, d16z6, hf mani, td05h, internal gate, homemade bc

initially hits 13 psi then higher rpm(5000+) tappers off to 10...would changing my vacuum source to the intake manifold make any difference you think? currently i have it off the compressor housing

 

No, compressor housing is great for internal gates, that's how mine is. I think your turbo is too small.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecD &raquo;</TD></TR><TR><TD CLASS="quote">No compressor housing is great for internal gates, that's how mine is. That's a pretty small turbo probably going out of its efficiency.</TD></TR></TABLE>

Na, 13psi isn't even touching its efficiency to be honest. Just sounds like a boost controller problem and or a boost leak. My car is doing the same damn thing right now. 15 psi, back to 12... a week ago it held 18 perfectly. And I can't find anything wrong with it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93turbo16 &raquo;</TD></TR><TR><TD CLASS="quote">

Na, 13psi isn't even touching its efficiency to be honest. Just sounds like a boost controller problem and or a boost leak. My car is doing the same damn thing right now. 15 psi, back to 12... a week ago it held 18 perfectly. And I can't find anything wrong with it. </TD></TR></TABLE>

when are you going to realize that your car just doesnt like you

 

well i have a ball and spring style mbc, and i had to modify the spring because it was too tough, but i am getting a new bc today so i will let you guys know how this works out

 

Mine goes up to 10 and then almost immediately goes down to 8 psi. I have the same kind of MBC.

 

MBC's suck. I have similar problems. Spikes to 12 and settles at 10psi. Td04-13t with hf manifold and external wastegate conversion.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonvtecD &raquo;</TD></TR><TR><TD CLASS="quote">No, compressor housing is great for internal gates, that's how mine is. I think your turbo is too small.</TD></TR></TABLE>
he should get more boost by switching to the intake manifold. I always saw about 1psi less running from the compressor housing due to the pressure drop across the intercooler.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">MBC's suck. I have similar problems. Spikes to 12 and settles at 10psi. Td04-13t with hf manifold and external wastegate conversion.


he should get more boost by switching to the intake manifold. I always saw about 1psi less running from the compressor housing due to the pressure drop across the intercooler. </TD></TR></TABLE>

Yeah but it will still to the drop thing, He can just turn the boost up on the MBC for more boost but it wont fix the problem. At least I don't think.

 

yea thats true.

 

maybe you need a boost controller with a gain function.

 

well i tried making a different mbc from home depot and put it to the intake manifold and same bs, so i am just going to settle with this until i do it properly next year