Ok, I was wondering if anyone here knew of a vacuum actuated exhaust cutout for a 3" pipe? I do not want a cable driven or electric cutout. No drilling holes in anything in the truck or running wires. It would be cool to just have a cutout system that worked soley on vacuum only under WOT Kind of like the Z06 vette but I'd rather not have it internal to the muffler. Just a cutout with a vacuum pod regulated linkage

 

Ask kbracing96. He built me something kinda like that. It's a QTP cutout with the electric motor removed and a factory wastegate actuator hooked up instead. The spring needs a little bit of tweaking to work 100% right and mine is boost actuated rather than vacuum, but I'd imagine that you could find a way to make it work for an N/A setup too.

 

The only problem i would see (i have mentioned it to kyle previously) is 0 vacuum can be seen in any gear at any RPM...so actually finding a way to have something that activates at a certain RPM might be difficult.

Dustin

 

Here is what I built for thunder550.





And a short vid


The extra spring on the shaft is used to adjust it for the boost opening psi. It pushes aginst the spring pulling in the waste gate actuator

 

That it cleaver KB, nice work...

 

I know, I wish I had one on my truck, The QTP cutout part is hard to come by on the cheap though .

 

Any ideas about doing it N/A? like what kinda switch or actuator would be needed?

Dustin

 

That would be awesome!

 

me likey! just what i want!

 

Use exhaust pressure in a N/A setup. Run a metal tube from a fitting on the exhaust, and make it into a coil, like a still. This will cool the gas. Then install a 12V air solenoid valve, then tie it into the actuator. Activate the solenoid with a WOT throttle switch, and there you have it, soup de jour.