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Old 08-17-2016, 06:30 PM
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TheSilverBuick TheSilverBuick is offline
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Join Date: Nov 2011
Location: Ely, NV
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Thanks for the reminder to order a copy of that issue!

I've been contemplating what kind of exhaust to put on the car, balancing cost versus efficiency, versus function (sound!). I think I have a rough idea of what I'll do to minimize some of these costs.

I think I'll run a 4" exhaust off the turbo and as soon as the pipe is parallel under the floor boards have a cut out split with a pair of V-band connections on it. The direction with the best flow will get a sealed cap for day to day driving, and have a 4" diameter 90º pipe to take it's place when I want it un-corked. The other direction will reduce down to 2.5", or maybe a pair of 2.5" pipes, that I happen to have sitting around from the Skylarks old system, and run out the back of the car, unmuffled to start but if a single pipe I can add a muffler easily, or spring for a dual inlet/outlet muffler. Then possibly have the exhaust supported in such a way that I can simply unclamp the 2.5 pipe(s) and put the V-band sealed cap over that way to have all the exhaust go out the 4" pipe. Not including a dual inlet/outlet muffler I think I can build this system for around $200. 4" stuff is pricey! I could probably eventually install a remote cutout valve, similar to the Skylark's, on it as well.

Alternatively, I would be around $290-$300 to run 4" pipe to the rear of the car, with some expected complications getting that size pipe around the axle and gas tank, and that doesn't include any muffler cost.

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The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!)

1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!)