Dyno results with O/R prochamber.
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Dyno results with O/R prochamber.
There was a charity dyno event today. Looks like tq dropped quite a bit since adding the prochamber. Here is the before and after prochambers.
Engine temp could have played a factor in the peak hp and tq numbers. My hp went up by 2-3 but tq dropped a by 2-4.
The vid didn't come out well. I was too far back and the too much background noise
http://www.youtube.com/watch?v=Np10PVdII1s
Engine temp could have played a factor in the peak hp and tq numbers. My hp went up by 2-3 but tq dropped a by 2-4.
The vid didn't come out well. I was too far back and the too much background noise
http://www.youtube.com/watch?v=Np10PVdII1s
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yea, I would guess that a change of just a few hp and tq could most likely be attributed to change in the air & temperature rather than the exhaust itself, if the before & after were on different days. Could be either I guess!
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Just my $.02
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I think you are right. It does feel like I lost power in the lower RPM ranges, but once the car gets to about 3000 RPMs, it feels faster.
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That was my main reason for getting the MAC Prochamber w/high-flow cats. This way, I still have enough backpressure to avoid losing any low/mid range torque.
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I called two shops today asking about CATs. One shop quoted me $189 ea. But they couldn't do the install since they do smog checks. Another quoted me $425 with install. Staying O/R looks better and better.
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If price is your concern, then you may want to consider www.pypesexhaust.com They have what's called mini cats, which are much less expensive than the quotes you got from those shops.
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I have considered the mini cats, but would they fit? It says 3" and the exhaust is 2.5"? Also might be hard to find a place to install them here in CA.
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I don't see why they wouldn't. As another TMS has already fabricated them to fit onto a MAC O/R Prochamber. I just can't remember which thread it was listed under. But I do know, it was somewhere in the 05-09 GT Performance Mods forum.
Last edited by m05fastbackGT; 11/24/08 at 08:18 PM.
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He posted in my thread. I think this is the one you are talking about.. Here is a link to some different cats you can choose from http://www.ninosport.com/Mustang/Cat...4Pa38Ta38Oc350
http://forums.bradbarnett.net/showthread.php?t=474088
http://forums.bradbarnett.net/showthread.php?t=474088
Last edited by SONICBOOST; 11/27/08 at 01:19 PM.
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I think most muffler/exhaust shops will not install aftermarket cats because of legal issues. Two of the exhaust shops I called said the they can sell me cats, but can't install them.
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I have also considered these. http://www.pysales.com/iwwida.pvx?;i...0%201?comp=ppe
Richard over at Radmustangs.com can get me these for 194.00 for the pair.
Richard over at Radmustangs.com can get me these for 194.00 for the pair.
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