When is it worth it to remove the exhaust.

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I drive to the track.450 stroker, Aluminum heads, Performer RPM intake. 282S Comps Cam (528 lift w/ 1.6 rocker ratio), 850DP, 1 3/4 headers to a 3 inch collector and 3 inch 30 series flowmasters. 3.91 gear.I run M/T Drags, 28x9x14Would I see any real timeslip difference by taking the exhaust off at this power level.

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Try it and see I have had two cars that I have done at the track testing, one was a 1969 Dart GTS with a stock bore high compression 440 motor, 727 and a race nine inch BM converter, BB Hooker fenderwell headers into a 2.5 pipe with 2.5 inch turbo mufflers mounted as side pipes exiting in front of the rear tires, it picked up .9 ET(nine tengths) and 9 MPH by removing the mufflers and pipes in the 1/4 mile at LACR, CA I didn't believe it was posssible, I made a bunch of runs that day and it( the differences) was absolutely accurate My current street and strip car is a BB Duster( a second and a half faster than the Dart was, 10.30 at 128 MPH)) that has a BB 518 C.I. pump gas stroker motor with a 727, ten inch custom built converter and a 3 inch exhaust system with a set of 3x14 oval Mgnaflow muffs mounted at the rear bumper with the same Hooker fenderwell headers as on the Dart, I ran the car at the local 1/8 mile track, Madras, OR and that car picked up .03 ET and .2 MPH by removing the complete exhaust system at the track, not worth doing in my opinion)probally the weight was the differences) My message is to try it and see, maybe it will pick up a bunch and maybe it won't. The mufflers will be the key Let us know your results

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Worth all the pain? Probly not just for a time slip.

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Alright until you run 11.01, or 10.01, then the spanners will be straight out.

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Alright until you run 11.01, or 10.01, then the spanners will be straight out.

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'Spanners'; in U.S. English this means wrenches.

Although 'putting it in the boot' means the same thing.

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Fixed!

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My old setup with 3" TTi and Dynomax muffs added 70 pounds and the car went the same 11.11 to 11.14 every time. So I have never run open headers again.. Too much noise for no reason!

OLD SETUP
446 with 1050 dom. and .650 comp flat tappet.
906 heads.

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And none of you re-jetted for the open headers so
you gained nothing and figured it doesnt matter
EDIT
but the length of the exhaust might help in making
torque because no one puts on a collector extension
which the total collector length should be about 16"-18"

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Sorry I did not spell out my complete process,
Mine was a track only car at this time,

Car had 12" turn down extentions, I also when down about 3 jet sizes if i remember right ,Was 1996 I thought it was a wash since the short times where better but lost 1 mph..