AT Horsepower Restriction
08-06-2009, 01:58 AM
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AT Horsepower Restriction
I was wondering where the HP difference between the AT and MT comes from. Is it just a computer restriction? Sorry if this had been posted about.
08-06-2009, 02:05 AM
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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?
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?
08-06-2009, 02:09 AM
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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
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
08-06-2009, 02:31 AM
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the tranmsission on the auto cant take 9,000 rpm w/out damaging it so pretty much it's the ecu we can only go to 7,500 rpm instead of 9 and thats where the rotary engine really wakes up.
08-06-2009, 02:35 AM
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VS8 - Yeah, I think I know what you're talking about, but that guy has also put thousands of dollars into his 8. That thing is one of a kind.
Yea, I know we can't rev as high, which is a bust. But I didn't think that was there the hp came from. Wow that sucks
Yea, I know we can't rev as high, which is a bust. But I didn't think that was there the hp came from. Wow that sucks
08-06-2009, 02:38 AM
#8
If you have a six port AT and fit a turbo you should get close to what an MT can do because these motors peak at around 7500 with a turbo .
I think if someone did a decent job of turboing an AT 6 port it would be a real sweet ride and give the AT some real credibility as a sports car ....
I think if someone did a decent job of turboing an AT 6 port it would be a real sweet ride and give the AT some real credibility as a sports car ....
Last edited by Brettus; 08-06-2009 at 02:42 AM.
08-06-2009, 02:47 AM
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08-06-2009, 03:00 AM
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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
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
08-06-2009, 03:07 PM
#23
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.
Last edited by Phil's 8; 08-06-2009 at 03:11 PM.
08-06-2009, 03:20 PM
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^^^ Phil is upwards of $10,000 on his current build.