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Feb 17, 2009, 07:57 AM
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#1
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Evolving Member
Personal Sales Rating: ( 5)
Join Date: Oct 2006
Location: kgn. JA
Posts: 244
Drives: 06' IX MR GG
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I need to hold more boost up top
Are there any other methods to get the stock turbo to hold more boost till redline (not taper off so much) I'm currently running the mods in my sig along with an AEM meth kit 50/50. I don't have my 3bar map setup yet so I'm referencing load. I'm spiking to around 330 load (29psi based on my AEM tru-boost) and falling way off to 232 by redline ~7500rpm. So far I have the forge DV with the red spring, I've preloaded the WG all the way, and turned down my tru-boost's crack pressure so it doesn't spike so much, but it still cant hold much up top. I'm not looking for it to hold 29psi till redline, but at least a little more than 20psi (I think that's what I eyeballed it at)
Anything else I can try apart from having to change my actuator?
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AEM cone filter | Forge DV/BPV | DC dp w/ cat delete | HKS Hi-Power Exhaust | Ebay O2 housing | Walbro 255lph pump | AEM tru-boost EBC | ETS LICP | ETS FMIC | AEM Meth 75/25 | ARP Headstuds | ACT HDSS | Tephrav5.10 w/JT Map Switch | everything else stock
Self Tuned
ET11.71@117.8mph
MGW & Lueboyz Racing to di werl!!!
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Feb 17, 2009, 09:19 AM
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#2
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Evolved Member
Personal Sales Rating: ( 4)
Join Date: Nov 2005
Location: RGV Edinburg, TX
Posts: 1,881
Drives: 2006 AS EVO MR and 2006 W/G STI
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The stock turbo doesnt flow enough to keep boost from tapering up top. You could use your tru-boost solenoid to setup closed loop boost control to increase your duty as rpms increase but good luck getting much more than 20psi above 7500 with the stock turbo.
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Tanabe TBE, Nisei LICP, HDSS, AEM boost solenoid, OE airbox/filter, Dunlop Direzza Star Spec, DS2500's, 25psi 93oct.
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Feb 17, 2009, 09:50 AM
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#3
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Evolving Member
Personal Sales Rating: ( 5)
Join Date: Oct 2006
Location: kgn. JA
Posts: 244
Drives: 06' IX MR GG
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damn...ecu based boost control is a bit too much for me right now, that's a whole other aspect to learn. Do you think messing around with the tru-boost's crack pressure would help it out a bit. At first I had it set at 15psi which made it come on boost real hard but as a result tapered a lot up top, I now have it set to 10.5psi which tames how it comes on boost just a little but tapers just about the same.
Would the forge actuator remedy this?
__________________
AEM cone filter | Forge DV/BPV | DC dp w/ cat delete | HKS Hi-Power Exhaust | Ebay O2 housing | Walbro 255lph pump | AEM tru-boost EBC | ETS LICP | ETS FMIC | AEM Meth 75/25 | ARP Headstuds | ACT HDSS | Tephrav5.10 w/JT Map Switch | everything else stock
Self Tuned
ET11.71@117.8mph
MGW & Lueboyz Racing to di werl!!!
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Feb 17, 2009, 10:04 AM
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#4
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Evolving Member
Personal Sales Rating: ( 7)
Join Date: Nov 2007
Location: San Diego, CA
Posts: 170
Drives: 06 EB Evo IX
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Quote:
Originally Posted by Mr. Evo IX
The stock turbo doesnt flow enough to keep boost from tapering up top. You could use your tru-boost solenoid to setup closed loop boost control to increase your duty as rpms increase but good luck getting much more than 20psi above 7500 with the stock turbo.
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I have pretty much every flow mod available done to my car and I can hold 20.5 psi at redline, but that falls to 20 or below at 7500 rpm. The only way to hold more boost at redline is to get a bigger turbo. I don't think upgrading the wga would help you that much.
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Feb 17, 2009, 10:50 AM
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#5
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Evolving Member
Personal Sales Rating: ( 5)
Join Date: Oct 2006
Location: kgn. JA
Posts: 244
Drives: 06' IX MR GG
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I hear ya...well I guess I'm just going to have to work with what I have for now.
Someone was telling me about the EPM O2 housing dump...anyone have experience with this?
__________________
AEM cone filter | Forge DV/BPV | DC dp w/ cat delete | HKS Hi-Power Exhaust | Ebay O2 housing | Walbro 255lph pump | AEM tru-boost EBC | ETS LICP | ETS FMIC | AEM Meth 75/25 | ARP Headstuds | ACT HDSS | Tephrav5.10 w/JT Map Switch | everything else stock
Self Tuned
ET11.71@117.8mph
MGW & Lueboyz Racing to di werl!!!
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Tags
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aem, boost, car, config, configuration, doent, engine, evo, hold, psi, setup, stock, taper, tru, turbo  |
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