anyone usin' exhaust cut outs?

the kind that're opened with a pull of a cable,not the kind you unbolt..i'm gonna be getting a set for the chevy and have heard that they sometimes dont open fully or wont close..anyone know anything about this?or have any tips or tricks?thanks!
creepy

 

i bought a set for my caddy but never installed them they did not look that good when they where closed.

 

I used them once the valve always leaked.A good cheap cut out can be made out of gas tank filler pipe welded to your pipes reach under car twist off filler cap inxtant twist off cut outs.cheap and dont leak

 

I have them on a 1935 Ford pickup, 350/350/3 dueces that I built from the frame up. They are J C Whitney cut outs. lousy junk, that I cut in half and 'fixed'. Now they work good. I was concerned about the cables getting rusty/sticking, but I havent had any trouble with them. What else ya wanna know? Leak is not the right word--J C Whitney supplies them with only 2/3 of the flapper. I cut them in half and welded in the missing part of the flapper. They are not as quiet as stock mufflers when closed but dang near it.

 

I made a set that are inline in the exhaust system. They bypass the muffler and come out the tailpipes like straight pipes.They basically make a loop around so you can go mufflers or not. I've got some pictures ,but I'm at work and can't get at them till tomorrow.

 

the thing that kept me from using them, and probably always will, is the experience my grandpa had with em back in the day on his 39 ford. fuckers never worked right. folks might be able to fix em and what not, i'll just uncap lakes or dumptubes!

 

My aunt thas them on her 73 chev p/u,502 prostreet truck,drag ready...you have to find some hi-temp grease and lay it lightly becase as they expand , they have a mind to lock up,otherwise they work great

 

I use a pair of moon electric cut outs - they are expensiv but they are workin great - you can open it when the exhaust is hot or you can open it a little , half or full - I like em

 

there was a post about this a while ago, someone mentioned using marine butterfly valves and you could rig up some cables or some fancy electro-opener it you're cool like that.

 

roddin28,i like yours...see,what i'm wanting to do is hook up a set of cut outs to my exhaust and run them to some dump tubes and then hook the lakes pipes to my dump tubes,that way i can run just mufflers until i pull the cable and open the cut outs,leading to a dump tube,but if i cap the dump tube,it'll run threw the lakes pipe..what do you guys think?i'm gonna post a picture for anyone who cant really see it (lots of my friends get confused when i explain it) anyone ever made their own?i'm sure it could be done with a choke cable..but what about the flapper?any thoughts?ideas?comments?thanks!
creepy

 

Get the cast iron efe housing with the butterfly off a mid to late 70s chev. p/u. These were actuated with a rod that went to a vacuum motor but could be rigged to a cable. Many Gm cars used them and they sandwich in between the manifold and head pipe. They don't make a perfect tight seal but should still work.
I would put the cutout on the straight section so the exhaust had a straight shot out when it is open. Put the muffler on the curved section.

I got some info on the electric ones at Pate. I will have to look for the paper they gave me. Cool but a little pricey.

 

my boss used to tell a story of test driving a customers jensen inteceptor (brit crap) and pulling the cable so that the mufflers were bypassed as he passed a cop - never did say whether he got a ticket or anything????

 

Here ya go..
http://www.jalopyjournal.com/ubbthreads/showflat.php?Cat=&Board=UBB1&Number=172825&Forum=All_Forums&Words=exhaust%20cutouts&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=1year&Main=172151&Search=true#Post172825

 

cadlight,thank you SO much!you dont even know!i was searching for the thread all night last nite!thanks!!
creepy

 

I made my own using flapper valves from a tractor supply store.(The kind they use on industrial engines to keep the rain out of the exhaust and engine when it is not running) I had to redo the flapper some and add a gasket to the flapper so that it would seal when closed. They work good but would not work inline. I am going to change them this winter so that they go directly on the end of my header collectors and the exhasust to the mufflers comes out of the side of the collector. This change will in effect have my exhaust coming straight out of the headers when the flapper is open. I may look for some of those marine valves as they look like the best option.

 

I made a very similar set-up to HR54Chevy's design on my 37 Chevy truck. Except i just used the type with the three-bolt flange and I just have to reach under and take off the flat plate with wing nuts. I fabbbed up some extension pipes to run them out to right behind the front tire and they just bolt on to that three bolt flange. Look great and sound better!!!! I was cruising all over Bonneville and Wendover with them in cut-out mode. It is about as loud as the stright pipe Harleys unless I really get on it. I have driven it around town as well and the GG show, just let off the gas around cops and you have no problem.

I normally run through the tailpipes, but the cut-outs are a lot of fun, don't think my neighbors would appreciate it at 6:45 every morning as i go to work though.

 

OK here's the pics of my cutouts .I hope you get the idea. I made the butterfly with a holesaw.When it's closed the exhaust goes through the glasspacks. when it's open it a straight shot out the tailpipe.

 

jethro,any more info on how you attatched the butterly to the lever or how well the butterfly seals inside the pipe?in the post about the marine cut outs,you'd said that a cable wouldnt do..is there a certain kind of cable you were using?i was thinking it would work with a choke type cable?thanks so far everyone!
creepy

 

HR54....I attached the butterfies with a spot weld through the center hole from the holesaw,then a couple of tacks on the other side. I ground a flat on the shaft so the butterfly sits centered.I used 3/8ths cold rolled round stock for the shaft.As for the shaft sealing there is a slight bit of leakage but not enough to make any noise.I drilled the pipe and welded 3/8ths nuts on each side then drilled them through so they act as bushings.I just used a choke cable and made a tie rod linkage so it operates both at the same time.Nice mellow rumble with them closed and a mean RAP when open.