WTF!!!!!

Im getting frustrated. I have a bov on my car, the thing struggles to hold idle. It stalls sometimes. The BOV is on the pipe coming right after the turbo, is this not where it should be?

If i rev it a bit, the idle goes up and down. If i get it to 4000 and let off it pretty much stalls.

I boosted to like 10 psi and held it there, the car jerks back and forth if i let off a little (only sometimes though), possibly surging? Why does it with a bov?. Idk, im at a loss. By the way, the elbo coming off the turbo is only an inch and 3/4 with 20+ pounds.

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Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.



[This message has been edited by Harvs (edited 03-04-2005).]

Does the bov need to be "t"ed into the boost line or vac??

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Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.

The reason the car stalls is because you're running a BOV with a stock computer. You can't vent metered air (air after the vam) into the atmosphere with the stock computer. It has no idea that it has left the intake tract. Try routing the air from the BOV back into the tube before the turbo. That'll solve your problem.

-Scott Ressler


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S&R Racing
www.s-rracing.com

What kind of BOV? is it really a BPV that is open most of the time? I suspect the valve is open / partly open all the time, causing the problems due to unmetered air as Scott explained.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 21 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car)

Its a 1g dsm bov. i just read an old post of someone doing this the exact same way, does the bov need to be hooked up to vacuum?

i assum this valve is leaking, it leaks at 17, i need to mod it to hold more boost.

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Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.

http://natomessageboard.com/uploads/natmac3/DSMbov3.JPG

this is setup the same way mine is, right after the turbo, open to the atmoshpere. he says, "It's functional, it's loud, and I don't get any stumbles or backfires."-natmac.

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Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.

Do you also have the one-way check valve?

For a 1g DSM valve to work well at all, you're going to have to mod it for higher boost and install a 1-way check valve. Personally, I had one on my car at one time and never really liked it much.

-Scott Ressler

Originally posted by SteveX82:
Do you also have the one-way check valve?

What is a one-way check valve??

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Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.

Alright, this is what i did. I hooked vac to the bov and it idles normal and doesnt stall, BUT, the car doesnt want to boost more than 10, it sputters and pops, and the bov doesnt do anything.

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Sandlewood beige 88 coupe 93k/ super 60 T3 at 24 pounds/ ATR 3" no cat or tail pipe/ 255lph high pressure pump/ Kirban AFPR at 42/ Spec stg3/ GN FMIC/ 1g DSM BOV/ 14* timing/ disconected KS/ Tri-ax short throw/ Autometer boost,vac and air to fuel/ 140 spedo/ Ford motorsports 5300-c springs/ tubular rear upper cntrl arms.