We picked-up one of these
exhaust cut-outs last week to check it out.





The tubing is a pos. But the valve, motor, and switch look better. We're going to mod the tubing and mount it on an f-body to see how it holds up.

For a couple of years, I've been pondering a way to get the silencer into and out of my N1, without getting out of the car, but no joy. Now, it looks like I'll be able to run quiet, and run straight-through when I want to - without getting out to remove the (smoking hot) silencer.

Anyone using one of these on a rotary? I'm concerned about the heat, especially on a BP/turbo.

 

I'd be interested to hear how it ends up going and just how well it seals up (apparently not a good feature of the old Mr Gasket types . )

 

Hmmm... does someone else have a subscription to 5.0 magazine?

Those do look like they would be cool for various exhaust projects. Please keep us posted on how well it works.

-Max

 

My friend has the Q-tec on his Z-28. That thing is FUN!!!! Quiet car and at the flip of a switch loud! I am about to install a Warlock muffler from Summit Racing on my GSL-SE. It is a turbo style (quiet, restrictive) muffler but it has a removable cutout that makes it a straight through muffler by removing the cover (or Q-tec as I plan on doing it!). Dual tips out the back. One quiet, one loud. Flip a switch in the dash to change between the two. Would be great on a 2nd gen. One loud muffler and one quiet one!

 

I saw another remote operated version in a drag racing mag that used a sliding plate for the cutout, instead of a butterfly. This looked like it sealed up very nicely. I think it was from a place called "Douglas Headers" but the price was a LOT more expensive.

 

Buzz, I ran "Douglas Headers" through google with the usual spelling variations, and other keywords - no joy. I'll check Nat'l Dragster, and the others. If you run across the ad' I'd be grateful for any info.

No subscript to 5.0 mag here

Steve C.
PS: on 11/11/02, Thanks veterans, NG, and AD's too. In memory of Lt. Col. Charles E. Cappelli - Thud driver -, and all the other River Rats.

 

sorry Steve, I was in a papershop checking the mags when I saw this one - didn't buy it coz US mags can often cost over $10 down in Aust. I'll check next time I'm back in there though - don't hold your breathe though as it was a month or two back that I saw it....
This version was basically the same in function but instead of the butterfly it had a flat steel plate which was surrounded on 3 edges by channel section (to prevent any gases blowing past) and on activation, a little servo motor spun a gear drive that "wizzed" it over to the open edge and opened the pipes. I think the price was in the $400usd range (which with the Australian dollar exchange rates scared me somewhat) - but I don't recall if it was just for the one, or a pair. It was very beefy in construction. It was in an tech article where they were doing a fitment of it onto a white early sixties full bodied nostalgia type drag car.

 

Oh geez, rednecks have been using those since... er, longer than you youngins have been around.

I wouldn't use that on a turbocharged car unless:
1) You have a specific EMS map which will run the engine safely during the exhaust cutout phase.
2) You have a ported or aftermarket wastegate which will not cause creep.
3) You only flip the switch when the engine is at idle or off.

 

Vence of Performance Garage in Nashville had an electric cut out of some type ,one straight pipe ,one muffler on the 3 gen he sold. Do not know the difference between the power of each. He may know because it is a dyno testing shop.

 

Ive also heard of the motor failing due to heat.

 

Sorry Steve, I had a look for the mag and couldn't find it - so no more specific details.

This sort of thing would be handy in my area as we have a legal noise limit of 96db (for pre 1986 cars) at half max rpm.... I can better that with induction noise alone!

Mark

 

Rednecks and hotrodders
Hell pa! They been usin them cutouts since before I was born, and I am genuinely classified as old (over 50).

Finally and on a serious note-------- please pay attention to numbers 1,2 and 3 the man knows what he is talking about. I strongly suggest having two sets of maps in a datalogit or similar system. When you use the cutout---load the "cutout map", when you close it reload the "street map". Flipping to OPEN is not something you should do when challenged at a stop light by Jan and Dean.