Any Way To Fix A Talon BOV That Leaks?

[2.216VTurbo]

Found my Talon BOV to be the culprit of slow spool up on the Rampage RT, I can actually hear it hissing during WOT spool up. 18-19 PSI boost is all I could get when racing/Dyno'ing at Mopars at the Strip this year. With it blocked off and the Grainger backed off 2 full turns it's hitting 21-22PSI with ease and ramps up MUCH faster but... The compressor surge is so loud and violent that I actually made three teenage girl scream yesterday when I spooled and shifted next to where they were walking It was actually kinda funny but the blocking it off is not a very long term solution. It already has the 'vented high pressure' mod but was done 6-8 years ago by someone else. Not sure if it's junk or there is a fix? It does blow off when it's supposed to when I close the throttle.

[GLHNSLHT2]

you have the high pressure mod just left open, no vac line to it right??

[2.216VTurbo]

you have the high pressure mod just left open, no vac line to it right??

Correct. Maybe the guy that did the mod screwed it up JK

[GLHNSLHT2]

I hope not. Try putting a Mity vac on the top port of the BOV and see if it holds vaccum. Can also pressurize the mod port and see if it holds boost. Both would see if the diaphram is leaking.

[2.216VTurbo]

^ Good Idea, I was gonna pull it off and try to 'clean' it like a dirty Grainger but vac test sounds like a better idea

[iTurbo]

If I'm not mistaken (been a while) you can get adapter flanges to upgrade to an aftermarket unit without the need for welding. Put an RFL on there! I've seen horses in a field buck as I let it off with them standing next to the fence around here.

Me personally, I was never a fan of the Talon bov. It always whistled at cruise ala "all I want for xmas is my two front teeth". I don't know if it was because of the elevation vs. diaphragm spring tension or what. Always made the car sound like it was riding on worn brake pads on the wear indicators.

[contraption22]

The RFL is loud. That's pretty much all it's good for.

From my research, the Synchronic BOV seems to be the best choice for aftermarket valves.

http://www.andysautosport.com/mitsub...a00000097.html

[johnl]

Timely and funny.
We were both futzing with DSM BOVs over the weekend.

I'm confused.


Sunday I did the Donovan Dodge Garage mod to a DSM BOV which was in almost new condition.


Per Mr. Donovan's page, I drilled a hole in the base flange such that the hole intersects the little port that comes in from the underside, the boost side. I thentapped and plugged that little port from the bottom side and inserted/glued a new barb into the edge of the base flange. Now, while that little port is closed off on the bottom, it connects to a new hose barb to atmosphere instead of to the boost side.


Now my confusion. When I apply my compressed air gun lightly to the new barb, sort of waving it past it, the big valve in the BOV will lift and flutter. Huh? Is that right?


I suspect that I could bang it open and hold it open if I applied lower pressure regulated air to the new barb. Maybe I should do just that. Could be my waving the air gun past the port is creating a Bernoulli effect?

[contraption22]

With boost applied only to the nipple you added, the valve should open easily.
With boost applied to both nipples, the valve should open as it would unmodified
With boost applied to the top nipple and the new nipple open to atmosphere, the valve should hold more boost than you would probably ever need, but will not respond very well to low pressure differentials.

[johnl]

Thanks Mike, as usual, right to the point with the good stuff. And . . . . now I feeeel better.

[2.216VTurbo]

With boost applied only to the nipple you added, the valve should open easily.
With boost applied to both nipples, the valve should open as it would unmodified
With boost applied to the top nipple and the new nipple open to atmosphere, the valve should hold more boost than you would probably ever need, but will not respond very well to low pressure differentials.

Should be a sticky

[GLHNSLHT2]

test yours yet Alan?

[2.216VTurbo]

Cars and Coffee Saturday, then a party, Moms day Sunday, then Buddy's house till late. Just getting home from surgery now so not today either. A long day tomorrow and then my night with the kids... Wrenching time only comes up in fits and spurts

[Aries_Turbo]

If you can get the mod to work like it's supposed to, you can use a solenoid hooked To a circuit that is controlled by the tps or a closed throttle switch so that it's in quick release mode when the throttle closes.

Brian

[Pat]

If you can get the mod to work like it's supposed to, you can use a solenoid hooked To a circuit that is controlled by the tps or a closed throttle switch so that it's in quick release mode when the throttle closes.

Brian

Or a cheap nitrous system WOT switch, or a pressure switch, etc.

I've done the WOT switch and the pressure switch and both work perfectly. Always get quick release, always can hold35+ psi boost.

[Aries_Turbo]

Or a cheap nitrous system WOT switch, or a pressure switch, etc.

I've done the WOT switch and the pressure switch and both work perfectly. Always get quick release, always can hold35+ psi boost.

yup. the WOT switch works but sometimes i adjust the part throttle tables so they will allow fairly high boost safely that could leak past the valve when its in quick release mode.

Brian