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Post by shelbyracing on Jan 21, 2013 23:45:43 GMT -6
So do you guys think I should try and place these right after the X Pipe? And do you really think there'd be a noticeable difference in power from having Magnaflows already? I realize the air slows down, even in a straight through muffler, and mine are 2.5" on a 2" exhaust and imagine it blows through it a little easier yet. The cut out is 2"  |
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Post by wireless on Jan 22, 2013 0:05:40 GMT -6
Honestly, I don't think it'll make a power difference. FYI - Manual cutoffs are a pain in the ass, and usually too hot to change on the fly. Just remember that  |
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XJSman89
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Posts: 6,309
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Post by XJSman89 on Jan 22, 2013 8:40:45 GMT -6
If you we're to get a cutout I would do it for sound over performance. I've always wanted to test it on our Dyno- maybe I'll get to soon. I drive with the cutout open more often than closed but I really can't tell any difference. If anything at all it's only a couple HP that would show up on a Dyno slip, not something you could feel. Granted mine is just before the Y pipe but still.
The electric wasn't that expensive, man. A manual cutout would be too much of a pain IMO. I like the open cutout sound but thats in comparison to the stock sound closed. If you have flows on it already it might not sound as good either, and I would think your performance gain would be even more minimal with some high flow mufflers on there already.
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Post by sall on Jan 22, 2013 9:23:38 GMT -6
Thats a push/pull type cutout Wireless not a bolt on plate. It's like an e cutout but manual. People used to use old throttle bodies to make cutouts.
Cutout less restrictive but still probably minimal gain.
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Post by shelbyracing on Jan 22, 2013 10:10:32 GMT -6
Yeah, that's my though too, the general consensus. Any ideas on measuring the exhaust pressure? (I don't have pre or pro catalytic O2 sensors). I'm thinking of unbolting the egr and making a little plate for a PSI gauge to tap into and just bolt it down. I believe the commonly accepted back pressure is 3-7. And anything over .3 starts to hinder performance. Yet how much pressure per hp% reduction? EDIT: New thread on the topic (I feel will be an in depth discussion) aurorah.proboards.com/index.cgi?action=display&board=Zoom&thread=26444&page=1 |
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