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depends on the year, 2006 and up have the same engine as the MT different tranny and limited by the ecu. 2004-2005 completely different engine, tranny, ecu, driveshaft, UIM blah blah blah im sure you get the idea. The difference in power comes from the different engine(4port) in the AT vs 6 port in the MT and mated to an automatic tranny that will give you a greater drivetrain loss in power being delivered to the wheels. Id say its an average of 40rwhp difference...I think?
I have a 2004 AT Biggest regret! I really want that extra 40hp, because I want to do more performance mods, but there's always a part of that says its not worth it because I don't have that 40whp that MT's have. So if I can get that i'd defiantly start modding it more. Someone told me its a computer restriction. Not true at all?
edit: nevermind, just re-read your post. Wow, **** that sucks for me haha
LOL you want MT power at a budget price go with these cheap mods, K&N drop in filter $50, midpipe $150-400, COBB
Accessport w/ free MM tuning $695, ZEX nitrous (50shot)+ BHR Throttle body spacer(cleaner setup)+other nitrous goodies ~$700
so you are looking at around $1600 more or less based on preference or how good a bargain hunter you are. This should give you the power to topple most non-FI rx8's. Costs less than a Quality set of wheels and tires. Never say never with the AT
ZachLegend, your best bet is to sell your eight today and buy something that you can be proud of. I have a hard time understanding why someone would buy the 4 port a/t and then cry later. The four port AT is what it is and that's all your going to get and I know exactly from where I speak. My s/c 4port is faster that a stock 6port a/t or m/t, but that's it. Put a turbo or s/c on the 6port and "whoops".Whom ever is saying that there is a restriction on RPM knows not what they say. My rev range is the same as any stock or FI 6 port m/t. Know that I do have a shift limit of 8500 RPM (8 will not shift correctly above 8500 RPM) The cost of switching a 4port car to a 6port car is near the price of a new car - better to live with what you have. I truly love my little 4port and while I can wish for a way to stuff more air and fuel into it, I am not disappointed when it does not happen.
Start every day with a smile and get it over with. ~W.C. Fields***black 266 whp AT with red on black interior, supercharged by Pettit, engine management by Cobb AP, engine tuning, rebuild and all mechanical by Black Halo Racing. Too many mods to list here. See my garage http://www.rx8club.com/vbgarage.php?do=view&id=12315