open down pipe and cutouts - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 14 Old 08-14-2012, 11:19 AM Thread Starter
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open down pipe and cutouts

thinking of getting an electric cutout. does anyone have any real world experience with them.

like make a pass with full exhaust then one with open down pipe?

would it even benefit me? i have a 3 inch down pipe to a borla straight through muffler turn down before the rear axle.

any advice would be great thanks


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post #2 of 14 Old 08-14-2012, 08:40 PM
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I got a 2mph increase in the 8th mile with my cut out open compared to closed I had a crappy 3 inch no mandrel bent downpipe on top of that it makes a difference


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407/495 at 12psi
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post #3 of 14 Old 08-14-2012, 10:56 PM Thread Starter
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Yea idk if I would gain much

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post #4 of 14 Old 08-15-2012, 07:54 AM
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I opened my dp last night out of curiosity and saw 2 more lbs of boost.
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post #5 of 14 Old 08-15-2012, 07:59 AM
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I opened my dp last night out of curiosity and saw 2 more lbs of boost.
Wow really im at 14 psi now...stock bottom end..i mite not want to open my DP then....lol...

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post #6 of 14 Old 08-15-2012, 08:39 AM Thread Starter
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Yea but seeing 2psi more may lean you out

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post #7 of 14 Old 08-15-2012, 10:24 PM
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I went for a ride and my air/fuel is still rich.

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Yea but seeing 2psi more may lean you out
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post #8 of 14 Old 08-16-2012, 01:04 AM
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I went for a ride and my air/fuel is still rich.
did the turbo spool any faster?...how much different did the car sound?

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post #9 of 14 Old 08-16-2012, 07:42 AM
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It seemed to spool up quicker. It's east to bounce off the rev limiter in 1st gear. Of course it sounds totally different it's pretty loud. My car was extremely loud when it was n/a and after the turbo went on it quitened it down 50-70%!
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post #10 of 14 Old 08-16-2012, 02:48 PM
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We Built FastMarks car Stock longblock.
The first 88mm hellion kit for 03 cobras. He picked up 100 TQ at the rear wheels through an auto by running an open DP.
Yes it will be loud.



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post #11 of 14 Old 08-16-2012, 03:14 PM Thread Starter
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^^^ thats bad ass but like i said how free flowing my exhaust is already would i really pick up enough to buy an electric cut out??? if is like 10-15hp im fine with what i have!

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post #12 of 14 Old 08-16-2012, 03:57 PM
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^^^ thats bad ass but like i said how free flowing my exhaust is already would i really pick up enough to buy an electric cut out??? if is like 10-15hp im fine with what i have!
Doesn't matter how free flowing you think your exhaust is. I have Straight through bullets that dump at the axle and with my down pipe opened I picked up 2-3psi more of boost and of coarse faster ET's.

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post #13 of 14 Old 08-17-2012, 02:40 AM
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Turbos are VERY sensitive to exhaust back pressure.
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post #14 of 14 Old 08-19-2012, 12:02 AM
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