4.11 or 3.7 diff ratio??? - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
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post #1 of 13 (permalink) Old 11-13-01, 11:56 AM Thread Starter
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4.11 or 3.7 diff ratio???

Your help please. I have to make a choice for my EB2 with an ELXR6 with a big cam. Keen to hear from anyone who is currently running or has run either ratio with an auto box.


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post #2 of 13 (permalink) Old 11-13-01, 12:58 PM
paul
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Yep E.B on nos has. Said no trouble with auto,but had to buy an electrical piece that puts his speedo readings right. Lower ratio realy livens his car up..
 
post #3 of 13 (permalink) Old 11-13-01, 01:12 PM
paul
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Sorry 3:7 imo
 
post #4 of 13 (permalink) Old 11-13-01, 03:25 PM
EB ON NOS
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KSK
I ve got a 3:89 (out of a skyline) in my car.
When u change ratios, u need 2 get
a electronic ratio box fitted in
the dash so as 2 give u a correct
speed reading.
I,m happy with my ratio, would
have got 4:11 but 2xcy (complete diff).
Hope this helps.

 
post #5 of 13 (permalink) Old 11-13-01, 05:21 PM
Anbo
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Check out this Mustang site. They have some good advice on diff ratios.

http://www.alternativeauto.com/tech/50_qa.html

Andrew
 
post #6 of 13 (permalink) Old 11-13-01, 05:24 PM
Anbo
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EB on NOS - Did the gear change make much difference to your fuel economy & cruising RPM?

Regards
Andrew
 
post #7 of 13 (permalink) Old 11-15-01, 07:03 AM Thread Starter
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Thanks guys, and Anbo that site was a good help too...cheers!
EB ON NOS - how much did they sting you for the electronic ratio box?? and what revs are you getting in 4th at 100Kms???Really want the 4.11 LSD but am a bit worried it could be a pain motorway cruising as exhaust note gets louder now at 3000rpm with cam and exhaust mods.
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post #8 of 13 (permalink) Old 11-15-01, 03:17 PM
EB ON NOS
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@ 110 kph it revs at 2,900.
Fuel eco on the free way is
about 350 - 370 (68 litres).
 
post #9 of 13 (permalink) Old 11-15-01, 03:20 PM
EB ON NOS
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Ratio box fitted was $325 from memory.
 
post #10 of 13 (permalink) Old 11-15-01, 04:44 PM
V8wagon
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EB ON NOS - can you recommend anyone in the newcastle to sydney area to talk to about changing the ratio ?
 
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