Whatup guys, I was finally done with my setup and took it to central florida turbo to get it tuned. Turns out the car won't go past 7 psi. My setup consists of a built b16 motor with a custom made manifod (no leaks), a precision turbo (SC34) .60 on the compressor side with a 57 trim wheel, and an AR of .63. Greddy type-s BOV, turbonetics evolution wastegate and a name brand manual boost controller. After that night I checked the whole system for leaks but found nothing, so I decided to go to a local turbo guru to see what was happening. He told me the boost controller was installed incorrectly and fixed it, but when I took it to the dyno again, the same thing happened. The guys as CFT know what they are doing and they still could no get the car past 7 psi. Any indicuations?
Is the turbo to big for my application? Does the spring in the wastegate (5psi with 5 shims) is too small for the boost controller to have an effect on it?

 

How did you check for leaks in the charge piping?

 

just curious what are you using as a air filter for your turbo?

 

Can you say boost leak ???

 

point blank...if the boost controller is not malfunctioning then boost is leaking somewhere. cause the turbo's making boost, its just not building up between the turbo and the intake manifold.

where are you getting your vacume source for the wastegate/boost controller setup?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blue00vtecsi &raquo;</TD></TR><TR><TD CLASS="quote">Can you say boost leak ???</TD></TR></TABLE>

WOW you're such a help.... Make sure your wastegate's not stuck open....

Does it take a long time for boost to come on?

 

If it's boost leak, the turbo will be creating a huge sound because it is constantly trying to build boost (turbo running at full tilt).

Fit a much heavier spring in the wastegate before troubleshooting further. This would tell whether it is the wastegate at fault or something else.

 

vaccum source for the wastegate is a fitting tapped at the I/C piping 5 inches from the turbine (no leaks). Boost starts to build up after 4500 rpm, I assume full bost from 5500.
I think is the wastegate because ther are not eviden leaks big enough to stop the turbo from building more pressure. Even with a vaccum line from the turbo to the upper port of the wastegate (the one used for a boost controller) it would not get past 7.

 

what are these "shims" in the wastegate you speak of????

 

These are small metallic discs that are used to compress the spring by a small length, therefore increasing boost. These are intalled on top of the spring

 

blow off may be bad and the o-ring on the greddy bov may be bad/leaking.......


on your wastegate dump does it bleed boost @ 7 psi???? maybe the wastegate is bad....( turbonetsics evo are know to do that) maybe swap it out for a tial temporarily...im sure fernando has one lying around...........


is the turbo new???? may be a cracked housing....or a blown turbo......


also how did u check the system for leaks and how mayne psi did u pressurize it to?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sporkcrx &raquo;</TD></TR><TR><TD CLASS="quote">How did you check for leaks in the charge piping?</TD></TR></TABLE>