Not a bad idea, something else I will throw on as a suggestion is find a powerstroke EBV, then weld in a piece to close the "notch" up. The plate is very thick, way thicker than the cutouts you have. It would probably work a lot better. It's what I've been thinking about using.

 

Ya there should have been a ring with a bevel in the kit that you put between the flange and the gate and when you tighten up the bolts that seats the vavle against the bevel. atleast thats what my 38mm china gate was like

 

Re: Anyone using Wastegates as exhaust cutouts?

Well, It's been awhile but it works. Running my 4" downpipe to a tiny 2.5" summit glasspack. The car is pretty darn quiet until the 60mm WG Dump opens.

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http://youtu.be/X2fiLfKN5AM

 

Re: Anyone using Wastegates as exhaust cutouts?

How do you think an old throttle body would work as a cutout?

 

Re: Anyone using Wastegates as exhaust cutouts?

It doesn't seal very tightly, but its the same as an electric cutout. With enough work it could work fine.

 

Re: Anyone using Wastegates as exhaust cutouts?

Ive seen boost activated Cutouts. Here:
http://www.cobaltss.net/forums/supp...vated-exhaust-cut-out-more-horsepower-284725/

https://www.himni-racing.com/index.php?main_page=product_info&products_id=764

http://www.spracingonline.com/store/SP_Exhaust_Cutout__Boost_Activated___3_inch/3673

But still cool to see a wastegate will work as well.

 

Re: Anyone using Wastegates as exhaust cutouts?

WG will work just as well for about a fourth of the price.

 

Re: Anyone using Wastegates as exhaust cutouts?

Sounds like a good idea as I have been thinking of getting an exhaust cutout for a while now.

Because the 60mm wastegate uses a poppet valve, I'm thinking the flow would not be very good compared to a 75mm cutout. Two cheap wastegates would probably match the exhaust cutout, but then its about the same price. So what would be best for reliability and sealing, two wastegates or one exhaust cutout?

 

Re: Anyone using Wastegates as exhaust cutouts?

As andy said...

Large cutouts aren't needed. A 60mm gate will flow enough for a shyt ton of HP. Also a valve is 10x as reliable and will make a much better/tigher seal than a butterfly type valve. *Should* be much more reliable than an electric motor as well. I pulled mine apart and put some high temp moly lube on the shaft as well.

 

Re: Anyone using Wastegates as exhaust cutouts?

Just a little update on this. It works... but not as well as I hoped. It seals very well and functions as it should. Trapped 144 with this setup below. I removed the 60mm gate and boost jumped up about 1psi and I picked up almost 2mph in the 1/4.

Building a 4" dump pipe for it now to see if I can pick up even more. Then I'll go back so some sort of cutout setup.




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Amazing. I just had this idea and here it is in use. Thanks for sharing

 

I grabbed an exhaust bypass valve from a scrap lambo exhaust pipe and welded it in my Trans Am. It had a vacuum diaphragm and I plumbed it to a gm wastegate solenoid to a switch. It worked well, but it defaults to the open position without vacuum, so first start was an ear shattering blast until the valve closed a few seconds later. Wife and neighbors weren't real happy with that setup so I pulled it back off. Couldn't get that thing to hold vacuum overnight.

 

A decent fix for this is a $2 china vac pump. Mine has held up for about a year now with no issue. I flip it on for a few seconds before I start my car. I don't even have it plumbed to the eng vac. Seems to have no issues running for long periods of time.