SPRAYED 01

iTrader: (22)

So I built my exhaust around having a boost activated cutout. I put a larger comp 88mm turbo on my car that requires a 4 inch dp. The way my hot side is I cant run a 4 inch through the bmr turbo k member. So my thought was 4 inch off dp to boost activated cutout, then a merge pipe that 3 inch through the k member to the rest of the exhaust. So when Im cruising and it doesn't need the best exhaust it goes through the muffler, then when it matters it opens and is free flowing out the dp.

Thing is it does not open. I have boost right off the comp cover, Its been bench tested and works. Sound performance has said that the issue is the dp flows right into the cutout and is keeping the blade shut. I would have thought the actuator could have over come this seeing as how its a cutout made to expel a lot of exhaust.

I have since put a qtp electric cutout in the same exact spot, that works great and stays open. Ive even opening it while in boost and it opens right up.

I really want the boost activated cut out, any ideas to make this thing work?

Thanks
Alex

oange ss

iTrader: (50)

probably have to increase the size of the actuator if exhaust pressure is keeping it closed

Firehawk441

iTrader: (41)

If you decide to stick with the electric cut out then contact QTP. They used to sell a controller that could be wired to a Wide Open Throttle switch which would open under WOT then close again when you let off.

SPRAYED 01

iTrader: (22)

Really? Never heard of that. That would be awesome but it takes like 3 secs for the motor to open so I don't know how well that would work

Blackpanther99

iTrader: (8)

Should work fine. Few people run them like that and have no issues.

Old Geezer

iTrader: (3)

From the way you have the 3" plumbed, I'd say that Sound Performance is correct...

SPRAYED 01

iTrader: (22)

If they are right about the exhaust keeping it shut they should warn of them possibly not working. I made the exhaust that way planning on it working. Black panther, do you know if the people running them like mine were using the sound performance units?

Sarg

iTrader: (6)

What about a hobbs switch/boost switch where it opens at xx psi? That would work with the electronic as well I would think.

SPRAYED 01

iTrader: (22)

It might but the motor takes about 3 to 4 secs to open.

sweet99ss

iTrader: (41)

Damn I really want one of those! but not if it doesn't work....

SPRAYED 01

iTrader: (22)

Like I said they told me because its at the end of my dp in direct flow is why it doesn't work. If you had it in a ypipe it would be out of direct flow and probably work.. Bs if you ask me, its there to let out the most exhaust as possibly, what's the point if it won't open under extreme flow

rotary1307cc

iTrader: (5)

I want a pneumatic one like that instead of my electric

I thought sound performance was the only one who had one but doesn't look like it. Whose is that?

It operates properly using regulated compressed air?

rotary1307cc

iTrader: (5)

It would take a lot more work than just adding a a Hobbs switch to an electric cutout

The gear motors have no feedback. It has no idea of its position. Hence why they use momentary switches

TrickrTreat

iTrader: (3)

It looks like a wastegate actuator.

what if your not running enough boost to open it. say it is set for 14 lbs before it opens, and you're only running 10. it will still be waiting for you too hit 14 to open. bench testing i'm assuming meant compressed air which who knows how much psi but i'm sure was more than 14. just throwing out my thoughts.

SPRAYED 01

iTrader: (22)

Its a sound performance cutout. I bench tested with a gauge. Starts to crack at 1psi,fully open at 10. I've tried up to 10psi intake psi which is actually more at the comp housing. Still nothing

PUNISHER TA

iTrader: (13)

It doesnt make sense that it is being held shut... Since it is a rotational valve, there should be equal forces on each half of the blade. Trying to open it = trying to keep it closed.


Another idea, is there a way to hook it up to exhuast back pressure... Since back pressure is ~3 times the charge pressue...

PS, I want one of these. but I won't be running it on a traditional Y either... Mine will be similar to yours, with 4" out the bumper and 3" to the stock catback.

I hope you get this figured out, or I will not be ordering one.

slow67

iTrader: (2)

What about buying a larger diameter pneumatic cylinder (for more force)?

SPRAYED 01

iTrader: (22)

Actually i could very easily hook it up to exhaust back pressure. I already have a test port that is the same size at the actuatos port. My only concern would be its going to be hot exhaust going in the actuator. Will it burn it up?

SPRAYED 01

iTrader: (22)

Punisher, my thoughts exactly on the equal pressure thing. If anything it should be easier to open since at idle it has a leak through the blade. They also said that's from the direct flow. Im waiting on the owner to call me back to see what can be done. At the very least I hope they take it back.

rotary1307cc

iTrader: (5)

Couple feet of coiled copper off the exhaust good to go