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Turbo VSV for boost control

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Turbo VSV for boost control Register Help Home Forum New Posts FAQ Calendar Community Groups Reported Items Top Posters Forum Actions Mark Forums Read Quick Links Today's Posts Contribution Actions Contribute Blogs What's New? Contribute Advanced Search Forum Toyota MR2 Generations MK 2 MR2 - SW20 MK2 Stand-Alone EMS and Nitrous Discussion Turbo VSV for boost control
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 9 of 9 Thread: Turbo VSV for boost control Thread Tools Show Printable Version Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 05-24-2010, 07:16 AM #1 christo4_99 View Profile View Forum Posts View Blog Entries Banned Join Date Jul 2006 Location Brandon Fl Posts 215 Thanks  1 Thanks  2 Thanked in2 Posts Total Contributions For
christo4_99     $ 0.00 Turbo VSV for boost control i have a haltech e6x and a 3rd gen.Anyone know if i can use the turbo vsv for boost control and if so how to wire/configure it? Reply With Quote 05-24-2010, 04:25 PM #2 CJMR2T View Profile View Forum Posts Private Message View Blog Entries Fabricator / PE Join Date Oct 2009 Location Lakeland, FL (just north of the Pythons) Posts 8,576 Thanks  5 Thanks  1,062 Thanked in948 Posts Total Contributions For
CJMR2T     $ 25.00 I'm not sure about the specifics for the haltech, but as long as the output control is PWM (pulse width modulation) which most are then the stock solenoid can be used.

Reading your documentation for the haltech will tell you what type of control its capable of and how to wire it.

If it does do PWM, then there are only two possible ways to hook it up which depends on the configuration of the haltech. Basically one wire will be hooked to the haltech and the other to either power of ground (again depends on the haltech). Reply With Quote 05-24-2010, 04:31 PM #3 christo4_99 View Profile View Forum Posts View Blog Entries Banned Join Date Jul 2006 Location Brandon Fl Posts 215 Thanks  1 Thanks  2 Thanked in2 Posts Total Contributions For
christo4_99     $ 0.00 hey...CJ? do i know you man.Did i sell you a border kit? i am in need of turbo exhaust btw. Reply With Quote 05-24-2010, 04:40 PM #4 CJMR2T View Profile View Forum Posts Private Message View Blog Entries Fabricator / PE Join Date Oct 2009 Location Lakeland, FL (just north of the Pythons) Posts 8,576 Thanks  5 Thanks  1,062 Thanked in948 Posts Total Contributions For
CJMR2T     $ 25.00 Nope, not me however, we might know each other since I did grow up in valrico and I've only been in lakeland for about 3 years now. Reply With Quote 05-24-2010, 05:55 PM #5 karl View Profile View Forum Posts Private Message View Blog Entries slowbie Join Date May 2006 Location Arvada, CO Posts 717 Thanks  3 Thanks  72 Thanked in56 Posts Total Contributions For
karl     $ 0.00 Originally Posted by CJMR2T I'm not sure about the specifics for the haltech, but as long as the output control is PWM (pulse width modulation) which most are then the stock solenoid can be used. i don't think the stock VSV is fast enough for PWM control. the stock ECU uses it as a bleed for the wastegate line- when activated, it just bleeds a specific amount of pressure off the wastegate to bump the boost up to 10psi. the pressure is controlled by the size of the ports in the solenoid.

if you need a VSV for boost control, grab an EVAP valve from any mid to late 90s GM. they're designed for PWM control and are dirt cheap. drive it at about 20Hz. Reply With Quote The Following User Says Thank You to karl For This Useful Post: christo4_99 (05-24-2010) 05-24-2010, 06:36 PM #6 CJMR2T View Profile View Forum Posts Private Message View Blog Entries Fabricator / PE Join Date Oct 2009 Location Lakeland, FL (just north of the Pythons) Posts 8,576 Thanks  5 Thanks  1,062 Thanked in948 Posts Total Contributions For
CJMR2T     $ 25.00 I could be mistaken, but I could of sworen the Gen 3's were pwm from the factory. If not then what would expand the gradual step down of boost. I've seen the boost drop progressively with the onset of knock... I thought Gen 2's did it too but its been so long since I've messed with one so I'm probably mistaken but I still think Gen 3's are.... time to scope it I guess. Reply With Quote 05-24-2010, 06:43 PM #7 Big Thurs View Profile View Forum Posts Private Message View Blog Entries I shoot bananas@Reckless Join Date Feb 2005 Location Eatonton, GA Posts 445 Thanks  5 Thanks  16 Thanked in16 Posts Total Contributions For
Big Thurs     $ 0.00 i don't think the stock VSV is fast enough for PWM control. the stock ECU uses it as a bleed for the wastegate line- when activated, it just bleeds a specific amount of pressure off the wastegate to bump the boost up to 10psi. the pressure is controlled by the size of the ports in the solenoid. I think that it is possible,but difficult. It's been my experience that pwm valves have a range of travel which will control flow, like a pintile in an idle valve. It's difficult for me to explain, but since the valve is designed to be on/off, an extremely small amount of movement of the valve will result in a large change in flow so it would need to be very precisely controlled compared to a valve designed for pwm.
91 Aquamarine Turbo 197K ATS TD06, A2W, Megasquirt, e85
calculated trolling using statistics Reply With Quote 05-24-2010, 07:16 PM #8 CJMR2T View Profile View Forum Posts Private Message View Blog Entries Fabricator / PE Join Date Oct 2009 Location Lakeland, FL (just north of the Pythons) Posts 8,576 Thanks  5 Thanks  1,062 Thanked in948 Posts Total Contributions For
CJMR2T     $ 25.00 Something else of interest about the Gen 3 vsv and why I think they are pwm. I have different Turbo, manifold, and an external gate. The gate has a 10psi spring in it where as the stock ct20 actuator is set to 8psi.

With the factory controller hooked up (as per stock) I'm limited to 13psi (same as stock). If intact it were a simple on / off calibrated bleed, I should be able to get 15psi since my base is already 2psi higher yet I can't get more then the stock 13.

I don't know, maybe something is funky with mine somehow but I doubt it.

On a seperate note, the gm evap control valve are really good for the job and as stated, they are cheap. Reply With Quote 05-25-2010, 09:02 AM #9 karl View Profile View Forum Posts Private Message View Blog Entries slowbie Join Date May 2006 Location Arvada, CO Posts 717 Thanks  3 Thanks  72 Thanked in56 Posts Total Contributions For
karl     $ 0.00 i could definitely be mistaken. in fact, i hope i am. it would be nice to have another cheap valve for boost control. Reply With Quote « Previous Thread | Next Thread » Posting Permissions You may not post new threads You may not post replies You may not post attachments You may not edit your posts   BB code is On Smilies are On [IMG] code is On [VIDEO] code is On HTML code is Off

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