youngmonte71 Posted April 8, 2011 Share Posted April 8, 2011 do exhaust cut outs really up performance? they sound awesome but do they really help? one i was looking at was http://www.quicktimeperformance.com part #QTEC30CP Quote Link to comment Share on other sites More sharing options...
Andreas Posted April 8, 2011 Share Posted April 8, 2011 If your engine benefits from less exhaust backpressure, yes... Quote Link to comment Share on other sites More sharing options...
Mike 57 Posted April 8, 2011 Share Posted April 8, 2011 I have the 3 inch QTP cutouts they do help at the track, but not as good as open headers for my setup. I guess it is all in the combination. They are fun! Quote Link to comment Share on other sites More sharing options...
Will Posted April 10, 2011 Share Posted April 10, 2011 If you want cutouts save your 200 bucks. go to jegs and get them for 25 bucks. They open and close with 3 wing nuts. Open em at the track or just leave em open like I did on my SS camaro. Quote Link to comment Share on other sites More sharing options...
evman140 Posted April 11, 2011 Share Posted April 11, 2011 Cannot remember which magazine I saw it in but there ws a Chevelle build with emphasis on a pair of QTP units. It was designed so that the flow of exhaust gases would go from the header/collector out through the cut out with a completely straight path, zero deviation from path of flow. Hard to explain so I will draw something up. This was a system designed specifically use with cutouts and I would only put them on in such a case, not just slapped on the side of the pipes like a lot of people do. Quote Link to comment Share on other sites More sharing options...
Andreas Posted April 11, 2011 Share Posted April 11, 2011 Jegs has this: Quote Link to comment Share on other sites More sharing options...
72MC Posted April 11, 2011 Share Posted April 11, 2011 If you want cutouts save your 200 bucks. go to jegs and get them for 25 bucks. They open and close with 3 wing nuts. Open em at the track or just leave em open like I did on my SS camaro. I started out with the manual/wing nut type and switched to the electric type. Nothing better than, with the push of a button, opening them up WHENEVER I feel like it versus unscrewing some wingnuts . I play with the electric ones all the time whereas I rarely used them when there were manually. - Dave Quote Link to comment Share on other sites More sharing options...
70mcarlo Posted April 11, 2011 Share Posted April 11, 2011 Nothing better than, with the push of a button, opening them up WHENEVER I feel like it versus unscrewing some wingnuts . I play with the electric ones all the time whereas I rarely used them when there were manually. - Dave Oh, so YOU'RE the one! Just kidding. Quote Link to comment Share on other sites More sharing options...
evman140 Posted April 11, 2011 Share Posted April 11, 2011 Jegs has this: This is the only way to go. You can even bolt up your nice QTP units to this. Quote Link to comment Share on other sites More sharing options...
502ci Posted April 12, 2011 Share Posted April 12, 2011 Originally Posted By: Andreas Jegs has this: This is the only way to go. You can even bolt up your nice QTP units to this. That is straight as you can get. Keep in mind though (which shouldn't be an issue) for ground clearance crossing under the driveshft. I know I can't do that on my Monte as it sits too low, have longtube headers, but mainly the fact my exhaust diameter is too big. I do have exhaust cut-outs on my Monte but only for the fun factor, well actually it gives me maybe a half tenth in the quarter but that doesn't make them worth it, it's playing with them... I also have one on my GMC Sierra...I never track tested that one but seat of the pants says it's slower if anything...again I put it on there give it a bit of a rumble when I want it then go back to dead silent without getting out the vehicle. I will add that I did have the cut-out on the Monte for about 6 months before I broke down and added a "DMH" electric cut-outs, on the Sierra I used a "QTP". Quote Link to comment Share on other sites More sharing options...
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