I just got my gsr tuned yesterday. I have a 40mm tial wastegate with a 5psi spring no boost controller. It was only boosting 3psi on the dyno and I made 194hp/149tq. Does that seem high? I have still have my stock exhaust and I have to wastegate dumptube down but its in front of my engine. Should I route it to exit behind my motor?


Modified by 90teg at 1:29 PM 4/1/2006

 

Thats not too high considering what the GSR puts out stock. The dump tube is fine there.

 

I don't think the dumptube issue is a problem....
why are you only boosting 3 psi?

 

what turbo?

 

Something isn't right, you should be boosting 5psi. Double check all your connections and vacuum lines, especially to the wastegate.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TopSecretEg6 &raquo;</TD></TR><TR><TD CLASS="quote">Something isn't right, you should be boosting 5psi. Double check all your connections and vacuum lines, especially to the wastegate.</TD></TR></TABLE>

I agree, he should be seeing at least 5psi. Is this a used wastegate?

 

you probably are boosting to 5psi over ambient but your ems is only seeing 3psi over sea level

 

whats the complete setup???

 

on a stock gsr motor and a t3/t4 .57 trim at 4psi i made 235 whp and that was just off a street tune. (tuned by dave from whipfactory)

 

what is the point of 3psi? honestly?

 

Stock gsr motor with JG victor X intake manifold, 28x6x2.5 intercooler, Lovefab SST turbo manifold, turbonetics T3/To4B stage 2 wheel .48a/r on the hotside, full-race 3" downpipe connected to 2 1/2" exhaust no cat w/ stock muffler. The wastegate is a tial 40mm brand new. It hit 3psi at about 4500rpms and just stayed there redlining at 8k. I don't know why it only hit 3psi with a 5psi spring. I have the wastegate vacuum line to the nipple on the turbo. Also vtec is set at 5600.


Modified by 90teg at 1:57 PM 4/1/2006

 

BTW I meant does that whp seem low.

 

Set wastegate vac off the Intake manifold and you will get 5psi. You are probably having a 2psi pressure drop across the IC, piping, TB...

 

let me take a wild guess, ur reading off a pos autometer boost gauge? the psi drop should be 1 maby 2, if u have a huge ic

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Quad-Damage &raquo;</TD></TR><TR><TD CLASS="quote">let me take a wild guess, ur reading off a pos autometer boost gauge? the psi drop should be 1 maby 2, if u have a huge ic</TD></TR></TABLE>

That, and don't forget the fact that it depends where his wastegate is seeing the vacuum signal..

Intake manifold or pre-intercooler side...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90teg &raquo;</TD></TR><TR><TD CLASS="quote">Stock gsr motor with JG victor X intake manifold, Lovefab SST turbo manifold, turbonetics T3/To4B stage 2 wheel .48a/r on the hotside, full-race 3" downpipe connected to 2 1/2" exhaust no cat w/ stock muffler. The wastegate is a tial 40mm brand new. It hit 3psi at about 4500rpms and just stayed there redlining at 8k. I don't know why it only hit 3psi with a 5psi spring. I have the wastegate vacuum line to the nipple on the turbo. Also vtec is set at 5600.</TD></TR></TABLE>all that money to run 3-5psi?!? good investment

 

Well it's pre-intercooler side since it's connected on the nipple that is on the turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ryan89crx &raquo;</TD></TR><TR><TD CLASS="quote">all that money to run 3-5psi?!? good investment </TD></TR></TABLE>

This was a baseline run just to see if there are any problems before I hook up the boost controller. I wasn't about to just go 10psi from the start. Good thing I did because I had a few pop up on while at the dyno.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90teg &raquo;</TD></TR><TR><TD CLASS="quote">This was a baseline run just to see if there are any problems before I hook up the boost controller. I wasn't about to just go 10psi from the start. Good thing I did because I had a few pop up on while at the dyno.</TD></TR></TABLE>ahh makes sense

 

Does it matter where the boost gage is routed to or what brand it is? Mine is going to the intake manifold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90teg &raquo;</TD></TR><TR><TD CLASS="quote">Stock gsr motor with JG victor X intake manifold, 28x6x2.5 intercooler, Lovefab SST turbo manifold, turbonetics T3/To4B stage 2 wheel .48a/r on the hotside, full-race 3" downpipe connected to 2 1/2" exhaust no cat w/ stock muffler. The wastegate is a tial 40mm brand new. It hit 3psi at about 4500rpms </TD></TR></TABLE>

I should think you'd spool a T04B with stage 2 .48 AR T3 hotside by, uhm, 2500 rpms? Less?




Modified by J. Davis at 6:35 PM 4/1/2006

 

Yeah.. you're only seeing 3psi because you're getting your vacuum for the WG from the turbo and your MAP sensor reads it from the IM, in which you have a pressure loss through your intercooler as someone stated before. I prefer to run all of my vacuum connections from the intake manifold. Look into a Golden Eagle vacuum manifold.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90teg &raquo;</TD></TR><TR><TD CLASS="quote"> full-race 3" downpipe connected to 2 1/2" exhaust no cat w/ stock muffler. [/i]</TD></TR></TABLE>

Stock muffler?

 

i say cuz the stock muffler

my friends dsm gained like 3 psi when he went from his 2.5" to a larger one

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">I should think you'd spool a T04B with stage 2 .48 AR T3 hotside by, uhm, 2500 rpms? Less?




Modified by J. Davis at 6:35 PM 4/1/2006</TD></TR></TABLE>

I here it spooling at about 3k and hit 3psi at 4500. My other turbo spooled at 2k, I don't know why this one spools later when it's smaller.