Miata Turbo Forum - Boost cars, acquire cats.

Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...
Sponsored by:
Sponsored by:

RX8 ring and pinion

Thread Tools
 
Search this Thread
 
Old 12-24-2009, 04:58 PM
  #1  
Junior Member
Thread Starter
iTrader: (14)
 
pitbull113's Avatar
 
Join Date: Aug 2008
Location: Lake City, Florida
Posts: 158
Total Cats: -17
Default RX8 ring and pinion
So I read on this website that the 4.44 ring and pinion from an rx8 fits the 94-97 miata. So I bought one and the ring gear is too big. Wrong gear from seller or wrong info?? Anybody try this? Please help a newb out...TIA
pitbull113 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 05:05 PM
  #2  
Elite Member
 
dustinb's Avatar
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,320
Total Cats: 13
Default
Originally Posted by pitbull113
So I read on this website that the 4.44 ring and pinion from an rx8 fits the 94-97 miata. So I bought one and the ring gear is too big. Wrong gear from seller or wrong info?? Anybody try this? Please help a newb out...TIA
I think I remember that thread, and I'm pretty sure several people said it wouldn't fit in a NA/NB, but only possibly in a NC.
dustinb is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 05:50 PM
  #3  
Junior Member
Thread Starter
iTrader: (14)
 
pitbull113's Avatar
 
Join Date: Aug 2008
Location: Lake City, Florida
Posts: 158
Total Cats: -17
Default
thanks for the reply.
pitbull113 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 06:53 PM
  #4  
Elite Member
iTrader: (13)
 
cjernigan's Avatar
 
Join Date: Oct 2006
Location: Atlanta, GA
Posts: 8,091
Total Cats: 7
Default
I've also read many many things saying it won't fit. It should fit the NC as Dustin said though.
cjernigan is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 07:22 PM
  #5  
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 3,143
Total Cats: 174
Default
I have a 4.44:1 gear. I got it from Mazda Motorsports a few years back. From a Kia maybe?
miata2fast is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 07:25 PM
  #6  
Junior Member
Thread Starter
iTrader: (14)
 
pitbull113's Avatar
 
Join Date: Aug 2008
Location: Lake City, Florida
Posts: 158
Total Cats: -17
Default
Originally Posted by miata2fast
I have a 4.44:1 gear. I got it from Mazda Motorsports a few years back. From a Kia maybe?
want to sell?
pitbull113 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 07:33 PM
  #7  
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 3,143
Total Cats: 174
Default
Originally Posted by pitbull113
want to sell?
Oh no. I am very happy with the set up.
miata2fast is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 07:39 PM
  #8  
Junior Member
Thread Starter
iTrader: (14)
 
pitbull113's Avatar
 
Join Date: Aug 2008
Location: Lake City, Florida
Posts: 158
Total Cats: -17
Default
Had to try. thanks for all the responses. so it goes without saying do NOT believe everything you read on the internet.
pitbull113 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 08:02 PM
  #9  
Elite Member
iTrader: (12)
 
neogenesis2004's Avatar
 
Join Date: Aug 2006
Posts: 4,413
Total Cats: 20
Default
MMS also sold a 4.8 r&p.
neogenesis2004 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 08:20 PM
  #10  
Junior Member
Thread Starter
iTrader: (14)
 
pitbull113's Avatar
 
Join Date: Aug 2008
Location: Lake City, Florida
Posts: 158
Total Cats: -17
Default
yes they still carry the 4.8 @ $279 and the 4.44 @ $479. figures I need the more expensive gear.
pitbull113 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 08:35 PM
  #11  
Former Vendor
 
Corky Bell's Avatar
 
Join Date: Dec 2007
Location: Texas Hill Country
Posts: 271
Total Cats: 11
Default
Considering all the torque of the turbos, that first gear is not of much use, and the fast cruise mode (west Texas), what final drive ratios do you guys feel would offer the best combo of fun?

Corky
Corky Bell is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 10:41 PM
  #12  
Elite Member
iTrader: (2)
 
miata2fast's Avatar
 
Join Date: Aug 2009
Location: Dover, FL
Posts: 3,143
Total Cats: 174
Default
Originally Posted by Corky Bell
Considering all the torque of the turbos, that first gear is not of much use, and the fast cruise mode (west Texas), what final drive ratios do you guys feel would offer the best combo of fun?

Corky
I guess it depends on what you are doing. I am a drag racer using slicks, and I never drive the car very far. I love the combo, but would hate it if I did more long haul driving.
miata2fast is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 10:43 PM
  #13  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,027
Total Cats: 6,593
Default
~ 3.3:1. That'll give you 70 MPH at somewhat under 3,000 RPM on a 5 speed, and probably make first gear useful again.

I've got a set of 3.636 on the shelf, and have decided I'll probably be installing it in my car next month, as I'll be doing a lot of freeway commuting. We'll see how that works out. Should put 70MPH right about at 3,100 RPM.
Joe Perez is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 10:51 PM
  #14  
Junior Member
iTrader: (4)
 
flipt86's Avatar
 
Join Date: Dec 2007
Location: Chattanooga, TN
Posts: 185
Total Cats: -1
Default
What Joe said... and for under $300 a set. Market is right for this...
flipt86 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 10:57 PM
  #15  
Elite Member
 
dustinb's Avatar
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,320
Total Cats: 13
Default
What would the ideal gear ratio be for drag racing? And where would I get it from?
dustinb is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 11:15 PM
  #16  
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Chicago. (The less-murder part.)
Posts: 33,027
Total Cats: 6,593
Default
Originally Posted by dustinb
What would the ideal gear ratio be for drag racing? And where would I get it from?
The ideal gear for all drag racing is 4.1:1, regardless of tire size, transmission gearing, engine powerband, etc.

As it happens I have a set in my garage in the 1.8-style fitment. I'll sell 'em to you for $500.
Joe Perez is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 11:38 PM
  #17  
Elite Member
iTrader: (6)
 
Nagase's Avatar
 
Join Date: May 2009
Posts: 1,805
Total Cats: 2
Default
Originally Posted by Corky Bell
Considering all the torque of the turbos, that first gear is not of much use, and the fast cruise mode (west Texas), what final drive ratios do you guys feel would offer the best combo of fun?

Corky
Six speed + 225/45/15...

Probably 3.0 to 3.3. This is a bit backwards compared to the rest of the thread though. :P
Nagase is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-24-2009, 11:58 PM
  #18  
Junior Member
Thread Starter
iTrader: (14)
 
pitbull113's Avatar
 
Join Date: Aug 2008
Location: Lake City, Florida
Posts: 158
Total Cats: -17
Default
Originally Posted by Joe Perez
The ideal gear for all drag racing is 4.1:1, regardless of tire size, transmission gearing, engine powerband, etc.

As it happens I have a set in my garage in the 1.8-style fitment. I'll sell 'em to you for $500.
WOW is that $500 shipped?
pitbull113 is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-25-2009, 03:58 AM
  #19  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,821
Total Cats: 3,481
Default
18psi is offline  
Reply
Leave a poscat 0 Leave a negcat
Old 12-25-2009, 11:22 AM
  #20  
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,659
Total Cats: 134
Default
Originally Posted by pitbull113
So I read on this website that the 4.44 ring and pinion from an rx8 fits the 94-97 miata. So I bought one and the ring gear is too big. Wrong gear from seller or wrong info?? Anybody try this? Please help a newb out...TIA
Originally Posted by pitbull113
Had to try. thanks for all the responses. so it goes without saying do NOT believe everything you read on the internet.
Epic fail, lack of comprehensions

Originally Posted by miataspeed2005
some dude its trying to tell me that rx8 LSDs will fit in a miata housing?
real or not?
Originally Posted by Ben
NC maybe, NC diff is pretty close to RX8

NA/NB ring and pinion will interchange into NC, and I assume RX8 as well.
Assumtion is the mother of all **** ups.

The NC and Kia R&Ps are known fitments.
__________________
Chief of Floor Sweeping, DIYAutoTune.com & AMP EFI
Crew Chief, Car Owner & Least Valuable Driver, HongNorrthRacing

91 Turbo | 10AE Turbo | 01 Track Rat | #323 Mazda Champcar

Originally Posted by concealer404
Buy an MSPNP Pro, you'll feel better.
Ben is offline  
Reply
Leave a poscat 0 Leave a negcat



Advanced Search
Quick Reply: RX8 ring and pinion


Reply Closed Thread Share

All times are GMT -4. The time now is 08:28 PM.