Previously I made 503whp @ 21psi where it would spike to 24psi around 5.5-6k and then fall off to 21 through redline. That was using a greddy profec s-spec controller and solenoid.

I just changed to hondata s300 boost managment with GM solenoid this weekend. We were able to make it hit 28psi but it still falls off quick and wouldn't hold 28 until 9k.

We swaped springs on my wastegate and the diaphram didn't look so hot. I'm gonna try and find a V44 gate to borrow to see if that is my problem. We are kinda puzzled on why it is having boost control issues over 20psi. Anything under is rock solid.

Few specs under the hood:
B18C1 9:1 Laskey assembled
84mm CP Pistons
Pauter Rods
Benson Sleeved
Headwork by Portflow
3-angle cut/P&P
Supertech valvetrain
JDM ITR cams/full-race gears
Full-Race Intake Manifold
Full-Race stage2gt/ac GT3076R .82 a/r
PWR Radiator
Thermal 3"
RC 1000cc
AEM Rail / Aeromotive FPR
Hondata S300 P28
Qualife LSD
ACT XTR6/Streetlite
GM 3bar
GM boost solenoid


Arthur @ Trackmasters did the additional tunning

Purple Sunoco 114

 

Great numbers!!! Nice setup!

 

excellent numbers none the less.

what size wastegate spring were you using?

did you guys ever try just using a manual controller?

 

Pics of the car/setup?

 

Brewer's Picture from Import Alliance 2007

Picture from April at Stage6Motorsports - Car looks different under the hood but it gives you the general idea. (red valve cover, Tein strut bar, aeromotive remote mounted fpr, Tony1 catch can, etc)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike@synapse motorsport &raquo;</TD></TR><TR><TD CLASS="quote">excellent numbers none the less.

what size wastegate spring were you using?

did you guys ever try just using a manual controller?</TD></TR></TABLE>

.7bar spring

Haven't tried a manual. This was the first boost change since the greddy setup. I might try one as i'm sure there is one around the shop but something makes me think it may be the wastegate or a weird vacuum issue.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sp00led &raquo;</TD></TR><TR><TD CLASS="quote">

.7bar spring

Haven't tried a manual. This was the first boost change since the greddy setup. I might try one as i'm sure there is one around the shop but something makes me think it may be the wastegate or a weird vacuum issue.</TD></TR></TABLE>

i would try a higher psi base spring to start off maybe a 13psi spring or so. manual controller if you have one lying around, they are easy to setup and work fairly well at or below double the spring.

 

I have to second that motion....go with a bigger spring just to eliminate it as an issue.

 

Congrats on the new numbers!!

Looks like you're really ringing out that 30R


I'll catch up with you this weekend. I can't wait to feel 400ft/lb

 

so what kinda boost pressures was this current dyno run at...spike to 28 then go down to......

 

nice set up man

 

Not sure the exact number right this second. Once I get the car on the street i'll datalog it and know exactly. From a glance over my tuners shoulders it looked to fall down to about 22-23 psi at 9k.

 

Hope you do not mind posting some pics of your car from this week-end.

 

Nice shots

sp00led, the bay looks sick

 

very nice

 

hows the spool with the bigger ar ?

 

Seems pretty good for a medium sized turbo. I had a gt28r before this so i know what instant spool feels like. I'll double check what full boost comes on at when I datalog it but I think it was over 20psi by 5500rpm.

 

it may not be holding boost because thats about all that turbo will do.

over 500 is tough on a gt30 turbine

 

I've seen similar setups do 550-580whp with a gt30r. If I could hold 25+ to redline i figured I would see similar numbers.

 

This makes me miss my 30r's spool time

 

maybe different cams will keep it from falling off at the high rpms???

 

Yea, I'm wanting to ditch the ITR's for some S2 pro1s

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDogg &raquo;</TD></TR><TR><TD CLASS="quote">it may not be holding boost because thats about all that turbo will do.

over 500 is tough on a gt30 turbine</TD></TR></TABLE>

I agree. Every car/setup is different. Maybe with the new spring you will have better luck Great power either way and I am sure it's fun

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sp00led &raquo;</TD></TR><TR><TD CLASS="quote">Yea, I'm wanting to ditch the ITR's for some S2 pro1s</TD></TR></TABLE>
change the spring to a big red/small red and get back to me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TiAL &raquo;</TD></TR><TR><TD CLASS="quote">
change the spring to a big red/small red and get back to me </TD></TR></TABLE>

if you can hold that 400 ft lbs a bit farther even 500 more rpm you are looking at a ton of more power.