Auto vs. Manual FD

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Aug 4, 2006 | 01:47 PM

base94montego

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Joined: Jul 2005

Posts: 155

From: Fairfax Co., VA

Is it true that the auto FD has 5 less horsepower to the wheels compared to a manual FD?? Is there also a difference in top speed??

Aug 4, 2006 | 05:14 PM

rx7girltk

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Joined: Oct 2003

Posts: 647

From: North NJ

1. Yes, auto transmission take about 20% out of power and manual take about 15% out.

2. Yes, the auto rear end is 3.90's while the manual is a 4.10.

Aug 7, 2006 | 10:26 AM

base94montego

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Joined: Jul 2005

Posts: 155

From: Fairfax Co., VA

Quote:

Originally Posted by rx7girltk' post='831471' date='Aug 4 2006, 06:14 PM

1. Yes, auto transmission take about 20% out of power and manual take about 15% out.

2. Yes, the auto rear end is 3.90's while the manual is a 4.10.

Ok, so is it safe to say that the auto has about 5 less hp to the wheels. What would you say the top speed would be on an auto, I know the manual's is around 160mph.

Aug 7, 2006 | 11:40 AM

Il RX8 lI

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Joined: Jan 2005

Posts: 842

From: AL

Quote:

Originally Posted by base94montego' post='831729' date='Aug 7 2006, 10:26 AM

Ok, so is it safe to say that the auto has about 5 less hp to the wheels. What would you say the top speed would be on an auto, I know the manual's is around 160mph.

Well, final drive gears leave it so that the manual at 4.10 can top out at ~182 and that the auto at 3.90 can top out at ~191. But then there's power restrictions and such.

Aug 7, 2006 | 12:18 PM

GreyGT-C

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From: Disclaimer: posts made after 11AM are most likely alcohol induced. Please disregard unless very funn

i had mine up to 176 with just catback and intake. It has the power to top out in stock form i think...... it just takes a while to wind 5th gear out.