Ecu-boost : Stock Solenoid with pill VS GM boost solenoid
#1
Ecu-boost : Stock Solenoid with pill VS GM boost solenoid
Had a Evo 9 in today that was getting a retune.
We had originally installed our boost assembly (OEM boost assembly with upgraded pill) with the stock 2-port solenoid but after starting the retune today, It didn't hold as much boost as I wanted for the new mods he had added.
So I switched the car over to a GM 3-port boost solenoid and walla! A little more than 2psi more up top and a little more room for more if he ever wants to go to higher octane.
GM is solid plot, Stock Solenoid with boost assembly is dotted plot:
Here is some data, Load / Airflow / WGDC differences. Darker shades are the GM solenoid, lighter shades are the stock solenoid with boost assembly:
Notice how much less WGDC the GM solenoid needs. The stock solenoid was maxed out at 100% WGDC from 6500rpm on and the GM solenoid is about 86% at 6500 rpm and 92% at 7000rpm on and supplying a little bit more than 2psi more up top.
Info about this Evo:
Evo 9
TBE with no cat
Cone filter with hacked oem box, cover and snorkel (to feed fresh air)
RC 750cc injectors
Walbro fuel pump
Stock turbo
Stock actuator
Tubular 02 housing
We had originally installed our boost assembly (OEM boost assembly with upgraded pill) with the stock 2-port solenoid but after starting the retune today, It didn't hold as much boost as I wanted for the new mods he had added.
So I switched the car over to a GM 3-port boost solenoid and walla! A little more than 2psi more up top and a little more room for more if he ever wants to go to higher octane.
GM is solid plot, Stock Solenoid with boost assembly is dotted plot:
Here is some data, Load / Airflow / WGDC differences. Darker shades are the GM solenoid, lighter shades are the stock solenoid with boost assembly:
Notice how much less WGDC the GM solenoid needs. The stock solenoid was maxed out at 100% WGDC from 6500rpm on and the GM solenoid is about 86% at 6500 rpm and 92% at 7000rpm on and supplying a little bit more than 2psi more up top.
Info about this Evo:
Evo 9
TBE with no cat
Cone filter with hacked oem box, cover and snorkel (to feed fresh air)
RC 750cc injectors
Walbro fuel pump
Stock turbo
Stock actuator
Tubular 02 housing
#3
I've learned a lot of cool stuff from everyone in the Ecuflash forum, so I figured I would try and give back as much as I can.
What PnP setup are you talking about?
#7
Evolved Member
iTrader: (37)
I agree with JB...your posts are by far the most informative I have ever read. I look forward to getting my 3port installed then tuned by you. Somewhat OT but do believe it necessary for bigger injectors on IX's with those mods (or spefically mine in my sig) with the 3port because of the boost it can hold?
Last edited by dbsears; Feb 28, 2008 at 11:03 PM.
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#8
It is required here for a TBE/no-cat, Cone filter, Ecu-boost upgrade injectors. I hate having to explain to guys that their car made 15-20whp more before I had to "de-tune" it because their injectors where maxed out.
It is mainly because of the AFR's required for holding boost on 91 octane. 11.0-10.9 up top makes them consistant pull to pull. Leaner makes a little more power but the curves usually aren't as smooth and the car isn't as consistant.
#12
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Join Date: Mar 2006
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Great stuff, thank you Bryan. I cringe that one day you'll get fed up for some reason and stop posting this kind of stuff anymore.
The vampire connection is the one thing that's preventing me from switching to 3port.
The vampire connection is the one thing that's preventing me from switching to 3port.
#14
Evolved Member
iTrader: (6)
I will switch to the GM unit only when theres no hacking involved.
Do you have dyno pull of the difference that 2 psi made? That would be interesting. I've been doing a ton of airflow logging. I even tried a MBC to achieve more boost. On my car it seems more boost doesn't always mean more airflow.
Do you have dyno pull of the difference that 2 psi made? That would be interesting. I've been doing a ton of airflow logging. I even tried a MBC to achieve more boost. On my car it seems more boost doesn't always mean more airflow.
#15
Evolving Member
iTrader: (2)
Originally Posted by razorlab
I think I need to light a fire under my **** and start getting the PnP's made/sourced.
anyways, looks good Bryan. Im so tempted to stop being a wuss and just try the 3-port install myself...
I wouldnt have learned so much without these forums