Makeshift exhaust cutouts, what if?? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-11-2007, 10:28 PM
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Makeshift exhaust cutouts, what if??

Today I was at home depot and I was walking down the fencing and and the piping isles. I saw some peices of piping that screw together and I decided to play around with them. I made a makeshift H-pipe that would flow into manual cutouts. Then I walked over to a yard stick and measured the inside of the pipe fittings that I had on the end. The diameter inside the piping was 2.5 inches. Then I thought to myself, "hmmmmmm......what if I were to weld my 2 1/2 inch flowmaster pipes to this contraption of mine?" I know the steel pipes are really thick and heavy but what do you guys (and gals) think?
Today I was driving around with straight open headers and I cant get myself to put the mufflers back on, its such a waste of a beautiful sound.

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Old 07-11-2007, 11:00 PM
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One of the first tickets I ever got was runnin' up Hwy. 25 north of Dayton with my cutouts uncapped. (1959).
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Old 07-12-2007, 12:33 AM
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Did the cop at least give you "the nod" or a grin as he handed you the ticket?!! I dont want to put my flowmasters back on, they give too much of a high pitched tone. Does anybody know of a way to get a deeper growl (or at least the same tone as I have now)?
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Old 07-12-2007, 08:44 AM
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Nope, poker face.
Here is an idea if you like the idea of cutouts. You can get the "get out and get under" manual style, the cable-operated style or the electrically-operated style.
http://store.summitracing.com/egnsea...t+cutouts&x=30

I'm old-fashioned and stuck in the 50's I guess, but I still like the tone from a pair of 36" glaspaks. Anything shorter than that is too raspy for me. I install 'em with the opening of the louvers toward the motor. If there's a baffle in 'em, I knock it out with a broom handle.
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Old 07-12-2007, 05:45 PM
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Thanks alot! I was hoping to find a happy medium between "get out and under" and the electronic. The cable operated cutouts are perfect for my budget and what I want to do. Thanks again!
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Old 07-12-2007, 06:05 PM
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if you want it deeper sounding get some 24x3 1/2 inch outlet tips.......and a couple of emptied glasspack housings or gutted cats
Shane


.......but if you go with the cable cutouts put them in an inconspicious place and put some quiet mufflers on there ...............blue lights shut em off pull over........Whoooooooo meeeeeeeeeee officer?

Shane
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Old 07-12-2007, 06:50 PM
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Don't forget JC Whitney!

http://www.jcwhitney.com/autoparts/P...up?Ntt=cutouts

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Old 07-12-2007, 09:31 PM
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Anybody that has used these, how well do they seal? I've also been toying around with the idea of an automatic cut out that is powered by vacume. Saleen has this exhaust systems for their cars that is the same basic idea: http://cgi.ebay.com/ebaymotors/ws/eB...4679&rd=1&rd=1

It would be nice to have a simple system that would open automatically at WOT without any need for electronics.
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Old 07-12-2007, 10:20 PM
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You could do that with an electric unit. Mount a microswitch at the carb throttle lever that would send 12v to a relay that would then open the valve.
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Old 07-12-2007, 10:47 PM
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How about the OEM vacuum-operated EFE valve, that blocks off one side of a V-8 so the exhaust runs through the intake crossover to the other side. It's closed when vacuum is applied, I think. Hook it up in the straight section so it's blocked off at high vacuum, and open at low.
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Old 07-13-2007, 06:08 AM
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I would bet those EFE valves would leak, I think they really don't seal well but enough to redirect the exhaust.
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Old 07-15-2007, 11:07 PM
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You're probably right, kinda like a giant Snuff-r-Not.
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Old 07-16-2007, 12:19 PM
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www.classicchambered.com has nice mufflers... and the longer glasspacks have a good sound too, short glasspacks sound crappy. If you're really stuck in the 1950s, get some smithy's glasspacks. I've seen them in Jegs catalog but probably available sooner at the local mom-n-pop speed shop.
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Old 07-16-2007, 01:27 PM
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I have seen a few videos of cars with those powersticks on them. I wonder how they sound "in person" and on an older car. Id be willing to try them if the price is right. Does anyone know how well they flow?
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Old 07-16-2007, 02:12 PM
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and there's always the cherry bombs - they're back in production. Haven't heard them in person though.

BTW, the flowmaster big block series mufflers sound very deep (the newer Super 40's do too!!). I can't remember what series they are (80 or 90), but they have more chambers and actually some pieces of tubing inside them. My buddies Chevelle (454) has them and the pickup across the street has them (i think) and they sound really smooth and deep. i like em alot. They have some BIG cases on those guys!
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