Cheap FCD
Moderators: Helpinators, Moderators
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- Second Gear
- Posts: 351
- Joined: Tue Oct 15, 2002 1:38 pm
- Location: Markham, Ont. Canada
- Contact:
Hay Ivano, long time no see. could you just ask Nuwan gives me a call on Monday night @ this # 416-804-3130
I would like to have one on my car. My engine has little problem so thats why I haven't enter any TSD this year yet, but after it fixed I will back for it with you guys. I am for sure to the Rally-X this year too, hope to see you there too.
Thanks for your connection to Nuwan.
Ben
I would like to have one on my car. My engine has little problem so thats why I haven't enter any TSD this year yet, but after it fixed I will back for it with you guys. I am for sure to the Rally-X this year too, hope to see you there too.
Thanks for your connection to Nuwan.
Ben
92 Legacy turbo with EJ20G engine swap \(^0^)/
Okay, don't know if anyone reads this post anymore, but here goes:
After spending a couple of days shopping around at the local crappy tire, home depot and building box, the closest thing i could find was a checkvalve at 0psi... since i'd rather have closer fuel mix, i ended up picking up a turbosmart FCD, which is supposed to vent whatever amount of psi you want before the map.
When i put it in the same place as Morgie's first picture, with one full crank of the screw i'm not getting fuel cut, but then again, it seems like pressure is down about 2 psi. Does this make any sense? I know, it's only been a few hours so i might have turned it too much, but at the same time, the boost controller works by turning the screw one full turn to get 1psi extra.
Could it be that i'm bleeding soo much air out of this valve, that i've actually reduced pressure in the manifold???
on the same manifold pressure line, i have my boost tap and the T from the charcoal canister.
meh, any thoughts are appreciated, but i assume that it's probably my mistake. I should know in a bit.
After spending a couple of days shopping around at the local crappy tire, home depot and building box, the closest thing i could find was a checkvalve at 0psi... since i'd rather have closer fuel mix, i ended up picking up a turbosmart FCD, which is supposed to vent whatever amount of psi you want before the map.
When i put it in the same place as Morgie's first picture, with one full crank of the screw i'm not getting fuel cut, but then again, it seems like pressure is down about 2 psi. Does this make any sense? I know, it's only been a few hours so i might have turned it too much, but at the same time, the boost controller works by turning the screw one full turn to get 1psi extra.
Could it be that i'm bleeding soo much air out of this valve, that i've actually reduced pressure in the manifold???
on the same manifold pressure line, i have my boost tap and the T from the charcoal canister.
meh, any thoughts are appreciated, but i assume that it's probably my mistake. I should know in a bit.
James L
'07 Magnum SXT - not stock
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'93 Legacy Turbo SS - 5spd conv, vf34, intercooled, K&N, dual stage mbc 11/16psi, hks 3" turbo-back w/hi-flow cat, kyb's, ADR 18" rims w/225/35/18zr's, 7" touch screen w/race camera
'07 Magnum SXT - not stock
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'93 Legacy Turbo SS - 5spd conv, vf34, intercooled, K&N, dual stage mbc 11/16psi, hks 3" turbo-back w/hi-flow cat, kyb's, ADR 18" rims w/225/35/18zr's, 7" touch screen w/race camera
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- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
You can build a relief valve yourself out of a few dollars' worth of stuff from a hardware store or even Home Depot. It's basically the same construction as a ball-and-spring boost controller, except a little easier.
Did you put a restrictor before the FCD? Maybe you need to.
Did you put a restrictor before the FCD? Maybe you need to.
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
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- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
Yeah. We're talking about pneumatic FCDs here, remember. They work by bleeding pressure away from the pressure sensor. The restrictor will help decouple the FCD/sensor from the rest of the system.
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
so wait, you think that i could be right about too much air escaping? and that i need to restrict how much is reaching the fcd and then in the being let out? i'll give it a try and let you know.
Vikash i know you've got the design for the electric one, but i'm so freaking nervous of doing wiring that talks to the ecu, i'd rather stick with mechanical.
i honestly don't get why it doesn't work, looks exactly the same in prinicple to Morgie's... wait...
i just looked a little closer at Morgies picture... he still has his stock boost controller hooked up...
why? i thought he was running an MBC?
okay now i'm wondering if i missed something with the dsbc i have installed.
lol.
i'm sick, tired and cranky. i hate when things don't work right damnit.
Vikash i know you've got the design for the electric one, but i'm so freaking nervous of doing wiring that talks to the ecu, i'd rather stick with mechanical.
i honestly don't get why it doesn't work, looks exactly the same in prinicple to Morgie's... wait...
i just looked a little closer at Morgies picture... he still has his stock boost controller hooked up...
why? i thought he was running an MBC?
okay now i'm wondering if i missed something with the dsbc i have installed.
lol.
i'm sick, tired and cranky. i hate when things don't work right damnit.
James L
'07 Magnum SXT - not stock
-
'93 Legacy Turbo SS - 5spd conv, vf34, intercooled, K&N, dual stage mbc 11/16psi, hks 3" turbo-back w/hi-flow cat, kyb's, ADR 18" rims w/225/35/18zr's, 7" touch screen w/race camera
'07 Magnum SXT - not stock
-
'93 Legacy Turbo SS - 5spd conv, vf34, intercooled, K&N, dual stage mbc 11/16psi, hks 3" turbo-back w/hi-flow cat, kyb's, ADR 18" rims w/225/35/18zr's, 7" touch screen w/race camera
alright, turns out the one from turbosmart doesn't work... the way i understand it, it just vents at all times, not once you reach stock cut off point.
Ran into Nuwan and snagged one of his mechanical ones.
1. vents only just before stock cut off
2. is a hell of a lot smaller and less showy looking.
Works perfect.
Thanks for the suggestions guys.
Ran into Nuwan and snagged one of his mechanical ones.
1. vents only just before stock cut off
2. is a hell of a lot smaller and less showy looking.
Works perfect.
Thanks for the suggestions guys.
James L
'07 Magnum SXT - not stock
-
'93 Legacy Turbo SS - 5spd conv, vf34, intercooled, K&N, dual stage mbc 11/16psi, hks 3" turbo-back w/hi-flow cat, kyb's, ADR 18" rims w/225/35/18zr's, 7" touch screen w/race camera
'07 Magnum SXT - not stock
-
'93 Legacy Turbo SS - 5spd conv, vf34, intercooled, K&N, dual stage mbc 11/16psi, hks 3" turbo-back w/hi-flow cat, kyb's, ADR 18" rims w/225/35/18zr's, 7" touch screen w/race camera
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- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
Yes, you could use the spare MBC this way. You just need a tee and the restrictor.
Since you're not using factory boost control, Maybe you could use the stock hose that goes between the boost control solenoid and the intake resonator. It has a 2mm restrictor in it already.
Since you're not using factory boost control, Maybe you could use the stock hose that goes between the boost control solenoid and the intake resonator. It has a 2mm restrictor in it already.
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
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- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
There's something else wrong... a downpipe and snorkusectomy shouldn't be able to cause you to overboost. I think you should try to figure that out -- you may be experiencing fuel cut for a different reason, or it may be misfire.
A pneumatic FCD and an MBC get hooked up to completely different parts, so there should be no issue with connecting both.
A pneumatic FCD and an MBC get hooked up to completely different parts, so there should be no issue with connecting both.
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
reading through this whole thread i was going to suggest using that restrictor, has anyone done this?vrg3 wrote:Yes, you could use the spare MBC this way. You just need a tee and the restrictor.
Since you're not using factory boost control, Maybe you could use the stock hose that goes between the boost control solenoid and the intake resonator. It has a 2mm restrictor in it already.
i plan on using an MBC to control boost, and an MBC before the MAP sensor, the restrictor would go BEFORE this MBC? and what is this other T needed for?
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- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
Code: Select all
Manifold----Restrictor----Tee--------PressureExchangeSolenoid
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Ball-and-SpringMBC
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Atmosphere
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
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- Vikash
- Posts: 12517
- Joined: Sun Nov 03, 2002 2:13 am
- Location: USA, OH, Cleveland (sometimes visiting DC though)
- Contact:
You could tap into the line going to the brake booster, or to the BOV, or to the FPR. I'd probably pick the brake booster. http://www.graphics.cornell.edu/~v/vacuum/
The pressure exchange solenoid is what that hose connects to.
http://www.graphics.cornell.edu/~v/chrysler_map/
The pressure exchange solenoid is what that hose connects to.
http://www.graphics.cornell.edu/~v/chrysler_map/
"Just reading vrg3's convoluted, information-packed posts made me feel better all over again." -- subyluvr2212
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- Fifth Gear
- Posts: 3526
- Joined: Wed Jul 18, 2007 5:07 pm
- Location: Whammy!
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- Fifth Gear
- Posts: 3526
- Joined: Wed Jul 18, 2007 5:07 pm
- Location: Whammy!