Need to tune after Diff swap? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 03-31-2008, 05:31 PM   #1
Elite Member
Thread Starter
iTrader: (13)
 
Join Date: Nov 2006
Location: Tigard, Oregon
Posts: 3,908
Total Cats: 0
Default Need to tune after Diff swap?

My 94 is at BEGI as an S4 system mule. I'm thinking about going to a 3.63 or 3.9 rear end gears to make better use of the power. Will changing the rear diff have any effect on the tune? Not sure if they are going to be using xede or MS yet.

They are tuning it and if the rear diff gearing makes a difference I want to get that in before they are done not after I get it home! Any of you guys that did the swap have any trouble or changes you had to make after?
cueball1 is offline   Reply With Quote
Old 03-31-2008, 05:48 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,883
Total Cats: 1,790
Default

it shouldn't you'll accelerate slower, but it wont change the tune really.
Braineack is online now   Reply With Quote
Old 03-31-2008, 06:03 PM   #3
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

Think of it this way... Your ECU does not know what gear you are in anyway, so changing the rear end ratio is not much different than just shifting from one gear to the next. The cruise RPM for a given speed will change of course so if you are trying to run lean in the cruise region that could make a difference but probably not a big deal.

But dang if your car is at BEGi they can tell you for sure.

I'd love to get the 3.6 ring and pinion myself. It is on my list of future mods, after a clutch upgrade and charge cooling.
ZX-Tex is offline   Reply With Quote
Old 03-31-2008, 06:28 PM   #4
Elite Member
Thread Starter
iTrader: (13)
 
Join Date: Nov 2006
Location: Tigard, Oregon
Posts: 3,908
Total Cats: 0
Default

I didn't seem to think it would make a difference either. Steph wanted to get it in before the car goes to the dyno for tuning though. I'd need to find the part ASAP if that's the case. If it doesn't matter I can wait until the right part at the right price comes along.

Thanks for the responses!

Brain, congrats on the forum. Hope it's working out for you.
cueball1 is offline   Reply With Quote
Old 03-31-2008, 06:31 PM   #5
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Quote:
Originally Posted by cueball1 View Post
Brain, congrats on the forum. Hope it's working out for you.
He didn't buy it if that's what you're talking about, Rick just made him an admin because Scott is a good babysitter.
cjernigan is offline   Reply With Quote
Old 03-31-2008, 06:37 PM   #6
Elite Member
Thread Starter
iTrader: (13)
 
Join Date: Nov 2006
Location: Tigard, Oregon
Posts: 3,908
Total Cats: 0
Default

Wha happened to Philip? There were a few months I wasn't active here after deciding to send the car off to BEGI. Come back and filips gone and Brains the Admin! I stupidly assumed that Brain bought it!
cueball1 is offline   Reply With Quote
Old 03-31-2008, 09:05 PM   #7
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,147
Total Cats: 6
Default

Philip sold the forum to Rick and Rick made Scott an admin. Have you not noticed all the great changes/additions to the forum? Philip would never do **** compared to what Rick did in the first week.
cjernigan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Noob to Miataturbo from MA JxPhan Meet and Greet 3 10-02-2015 03:17 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:16 PM.