khmboostedeh2

hey guys, i just got a boost guage and turns out im running 12-13 PSI at high rpms. I have a garrett turbo with an internal wastegate, and i have my boost controller turned all the way down. I was expecting to be running around 5-6 PSI. Anyone know why or what could be the problem? I have the boost guage running to a fuel vacuum line, the BOV is running to a I/M vacuum line.

Oh and something else that might help determine the problem, I can rev the engine without the BOV goin off.

any help is appreciated thanks

tgreaves

Either you gauge is wrong or your wastegate isnt set to 5-6 psi.. There are other problems that can cause this but these are the most obvious ones..

DaX

iTrader: (1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeterkm02 &raquo;</TD></TR><TR><TD CLASS="quote">Oh and something else that might help determine the problem, I can rev the engine without the BOV goin off.
</TD></TR></TABLE>

This isn't a problem...it's completely normal. Your engine has to be under load to build boost.

underpressure02

What kind of boost guage? My auto meter I think is 3 or 4 psi off on the high side. I logged it through my aem to see what my real boost was and is.

DaX

iTrader: (1)

OT...but every time I see you post I start singing that Bowie song..."under pressha..."

*vanilla ice beat*




Modified by DaX at 6:43 PM 7/21/2004

underpressure02

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaX &raquo;</TD></TR><TR><TD CLASS="quote">OT...but every time I see you post I start singing that Bowie song..."under pressha..."

*vanilla ice beat* </TD></TR></TABLE>

never heard of that song. Have an mp3?

tgreaves

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaX &raquo;</TD></TR><TR><TD CLASS="quote">OT...but every time I see you post I start singing that Bowie song..."under pressha..."

*vanilla ice beat* </TD></TR></TABLE>

*wispers* Actually its Queen....

tgreaves

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by underpressure02 &raquo;</TD></TR><TR><TD CLASS="quote">

never heard of that song. Have an mp3? </TD></TR></TABLE>

http://www.amazon.com/exec/obi...music


Go down to where the songs are and its on there.. The mp3 is shitty but its the song..

Jeffescortlx

Sounds like you have a 12psi waste gate spring. If that's so, it does'nt matter how low you set the boost controller, it not gonna go below that untill you change the waste gate.

khmboostedeh2

well, i just re ran vacuum lines. i T'd off teh fpr vacuum line and put teh BOV there, and put the boost guage at a vacuum line at the throttle body.

now, the boost stays below 7, and theres a freak turbo whizzing sound. like not a smooth high pitch whistle.

tgreaves

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeterkm02 &raquo;</TD></TR><TR><TD CLASS="quote">well, i just re ran vacuum lines. i T'd off teh fpr vacuum line and put teh BOV there, and put the boost guage at a vacuum line at the throttle body.

now, the boost stays below 7, and theres a freak turbo whizzing sound. like not a smooth high pitch whistle.</TD></TR></TABLE>

Is the freakie noise when your in boost or when you let off the gas??

Also you might want to invest in a vacuum block so all your vacuum sources can be referenced at one place..

If you just rerouted vacuum lines then where did you run the wategate line to?

khmboostedeh2

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

Is the freakie noise when your in boost or when you let off the gas??

Also you might want to invest in a vacuum block so all your vacuum sources can be referenced at one place..

If you just rerouted vacuum lines then where did you run the wategate line to?</TD></TR></TABLE>
i only rerouted the vacuum lines i mentioned. the freak noise may have been because oil, i checked the oil and determined it was low, so i put more in. the noise is still there just not as obnoxious. by the way it occurs during boost, as im climbin in RPMs

tgreaves

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeterkm02 &raquo;</TD></TR><TR><TD CLASS="quote">i
i only rerouted the vacuum lines i mentioned. the freak noise may have been because oil, i checked the oil and determined it was low, so i put more in. the noise is still there just not as obnoxious. by the way it occurs during boost, as im climbin in RPMs</TD></TR></TABLE>

That might be normal but youll know if it doesnt sounds right.. Check to make sure the turbo spins freely and there is nothing touching the fins or anything..

khmboostedeh2

is it okay to run the BOV to the fpr vacuum line, and run the boost guage to the I/M right at the throttle body?

hatchedzex

run all your vaccume's and guages to the right of the throttle body. this way you get the boost reading going into the IM and not the charge tubes. you can T yer vaccumes off anything after the tb, i have my boost guage and bov all on the fpr vac line so i get every reading possible.

Joseph Davis

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaX &raquo;</TD></TR><TR><TD CLASS="quote">This isn't a problem...it's completely normal. Your engine has to be under load to build boost.</TD></TR></TABLE>

With how most Hondas are set up, true... you'll find other cars do things differently. All DSM make boost when free revving, so do the RX7, and a buncha others. Turbine sizing, yo!

khmboostedeh2

im still stumped on why the noise is so, on top of it all, i really dont feel it boosting much at all, back when i put the turbo on, i use to feel it put me into the seat, now i can barely feel any pull. anyone?

swlabhot

You may have an exhaust leak somewhere.....

or your turbo might be on its way out...?

tgreaves

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jeterkm02 &raquo;</TD></TR><TR><TD CLASS="quote">is it okay to run the BOV to the fpr vacuum line, and run the boost guage to the I/M right at the throttle body?</TD></TR></TABLE>

Heres the thing.. You dont want to run critical componets(fpr, wastegate) with other things that require alot of air or have long vacuum lines unless you make sure there is enough air flow through the source..

Meaning you dont want to run a line from a small nipple on the intake manifold to your BOV and to your FPR.. This is why the vacuum blocks are so great.. You run a line from a big port to the vacuum block(alot of people use the brake booster line).. With this you get alot of flow and quick responding changes in pressure to your componets..

This might sound confusing but look at it this way.. If you run a BOV and a FPR on the same line, and lets say your running 10 psi.. When you let off the gas, all the pressure in that line has to be sucked out.. So the fpr will see pressure changes slower than what the pressure in the intake manifold actually is.. Get it..