Performance ModificationsWant to talk about performance modifications for your Dodge Challenger? This is the forum for that. Anything from exhaust systems to power adders and everything in between. (Dodge Challenger Performance Modifications)
I did the cam swap, heads, and headers at the same time so I may not be a perfect representation of what you are looking for. My driveability was really no different at lower RPM. The big change happened at 4k. The car just went into beast mode. Which doesn't sound good on paper but if you think about it it kind of works out better that way. If you give your car the beans from a stand still you are fighting for traction. So from idle to 4k you are driving pretty much normally without any or much added power. But when you hit the the 4k range, where we play when we race, you feel a 60hp difference.
My MPG only dropped by an average of 1MPG.
I'm finding that increased power at lower RPM is not really that fantastic. I have a E-Force which is a screw type SC and while fun to spin the wheels as I please. I liked how my car was set up NA a little better where it was normal driveability down low and whoah up high. In retrospect maybe I should have went turbo or centri type SC. We'll see how my final tuning goes and if it smooths out some of the dislikes I have about the driveability of the SC.
>>> is this Exhaust or intake manifold or both? I would like 60 to 80 HP more in the future..
Both - the add'l 12hp from changing the exhaust vs. the cost of parts (I'd favor the clamshell SRT manifolds for mitigating heat in engine bay vs. aftermarket shortys), mid-pipes, labor, its not worth $1k to me for the small gain.
Time and again most of the guys (local shop that works on a lot of Hemis) recommend pull the heads when changing out exhaust...now that's a lot of work, even if doing it yourself.
Paying for someone to that, you can imagine the $$ for that.
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My ride was already s/c'd but I did not notice any gas mileage decrease from before aside from flooring it. The main thing I noticed as well as others was the sound idling and driving. Which now sounds more like a muscle car.
Very pleased with the results it also idles well not really lumpy.
2010 RT Classic, auto, Eibach Pro Kit, JBA shorty, Serious Metal Catch can, 180 T-Stat, Magnuson 8 Lbs boost, BBK 90mm Throttle body, Carbon fiber CAI, Magnaflow Catback, SMF Strut Tower Brace, SMF Big brake conversion, some other goodies and a custom tune by Johan
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