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-   -   Automatic transmission performance (http://www.focusfanatics.com/forum/showthread.php?t=314345)

harrison.mike.j 04-15-2013 02:48 PM

Automatic transmission performance
 
Hi guys,
Just picked up an '02 SE wagon. Seems to be lots of performance info on most systems of the car but not a lot of help for the auto trans. Anybody have any experience with performance upgrades and limitations of them?

harrison.mike.j 04-15-2013 04:50 PM

Lots of info in this article from Muscle Mustangs and Fast Fords. This link is the transmission article but the entire series is full of great performance tips and follows the build with lots of pics and details. Worth a read.

http://www.musclemustangfastfords.co.../0311mm_focus/

1turbofocus 04-15-2013 05:01 PM

With a custom tune there is a lot that helps the ATX , line psi , shift rpm etc

If you need more I would look into Lentech Automatics then did the ATX in my car that held 723HP and ran a best of 10.95 @ 137 in the 1/4

Tom

badass3 06-22-2013 09:42 PM

I have an auto with a lentech valve body, head polish, adj cam gears, focus central race header, svt intake, svt exhaust, 2k IM, ported tb, and chipped and I will say my focus runs very well. Great Lowend and stays with power to about 6200 rpm.

Tom can set you with a tune and synthetic ( Mobil 1) ATF fluid helps as well.

harrison.mike.j 06-22-2013 11:32 PM

Quote:

Originally Posted by badass3 (Post 4785614)
I have an auto with a lentech valve body, head polish, adj cam gears, focus central race header, svt intake, svt exhaust, 2k IM, ported tb, and chipped and I will say my focus runs very well. Great Lowend and stays with power to about 6200 rpm.

Tom can set you with a tune and synthetic ( Mobil 1) ATF fluid helps as well.

I've recently decided to go mild NA rather than mild turbo build (my main concern about the turbo build would be running higher octane fuel$$) so it's reassuring to hear that you can get some good low end out of it. Your list of mods sounds similar to what I'm picturing but with some stage 1 cams. What kind of mileage do you get? Thanks for the advice guys!

EDIT: After reading around it looks like I'm going to end up running higher octane fuel anyways. Looks like any mild build with a tune will require higher octane. I read there's an 87 octane tune available but I have a feeling I won't be satisfied with it.

badass3 06-23-2013 10:01 AM

I get about 25 average ( but I sit in rush hour traffic coming home everyday) on the road I can get about 33

01svt_sedan 06-26-2013 09:25 PM

The code of the transmission provides info on what type and how much the transmission is rated for. I read this a while ago so correct me if im wrong. 4f27e. 4-speed, FWD, 270 divided by 2 gives you max torque. Dont remember what the E stands for.

emsvitil 06-27-2013 04:14 AM

e probably means

electronically controlled

emsvitil 06-27-2013 04:27 AM

It's 270 ftlbs after torque converter multiplication.

http://books.google.com/books?id=atz...rating&f=false

harrison.mike.j 07-11-2013 01:25 AM

Quote:

Originally Posted by 1turbofocus (Post 4686337)
With a custom tune there is a lot that helps the ATX , line psi , shift rpm etc

If you need more I would look into Lentech Automatics then did the ATX in my car that held 723HP and ran a best of 10.95 @ 137 in the 1/4

Tom

What are the differences of transmission shift quality/upgrade via a tune vs. a valve body kit (http://www.lentechautomatics.com/4f27eproducts.html)? I would think just getting a tune and controlling things from the PCM would feel similar to the valve body upgrade. I think, without fully understanding both, that a mildly modified Focus could take advantage of both. Does a custom tune change any if the valve body kit is installed vs. not installed?


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