NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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- 3rd Generation Specific (https://www.nopistons.com/3rd-generation-specific-18/)

- - Auto vs. Manual FD (https://www.nopistons.com/3rd-generation-specific-18/auto-vs-manual-fd-60922/)

base94montego

08-04-2006 01:47 PM

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??

rx7girltk

08-04-2006 05:14 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.

base94montego

08-07-2006 10:26 AM

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.

Il RX8 lI

08-07-2006 11:40 AM

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.

GreyGT-C

08-07-2006 12:18 PM

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.

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