Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: Phoenix R1 diff ratio
sdenne

posted on 21/10/20 at 09:58 AM Reply With Quote
Phoenix R1 diff ratio

Hello,
my recently bought Phoenix R1 has an english axle with 3.54:1 diff ratio - this is the longest available ratio.
Is this okay and why?
sdenne

View User's Profile E-Mail User View All Posts By User U2U Member
Edwardo

posted on 21/10/20 at 12:50 PM Reply With Quote
Hi - 3.54 is the lowest 'generally available' and most commonly used for English Axle'd BEC's it seems.

But you can get a 3.31 from Retro Ford :-

https://www.retroford.co.uk/product/3-31-english-crown-wheel-and-pinion-cwp-3-3/

Cheers
Tony

[Edited on 21/10/20 by Edwardo]

View User's Profile E-Mail User View All Posts By User U2U Member
adithorp

posted on 21/10/20 at 02:12 PM Reply With Quote
Ideally you'd want higher ratio than that (depending on which version R1) but difficult with English axle unless you go for the custom options. Even 3.36 Sierra diffs are considered too short by some, though probably fine for most uses.

I use a 3.22 Freelander diff'. It's a bit tall at times setting off. Gives me72mph at the rev limit in first and will top 140 flat out but a bearable 7k rpm at 70mph on the motorway.

Have you tried the gear calculator in this section to see what you'll get?





"A witty saying proves nothing" Voltaire

http://jpsc.org.uk/forum/

View User's Profile View All Posts By User U2U Member
TimC

posted on 21/10/20 at 08:54 PM Reply With Quote
Depends which R1 and what tyres you have. My 2007/8 engine with a 3.54 Diff and 205/60/13 tyres is geared for c.136mph.
View User's Profile View All Posts By User U2U Member
sdenne

posted on 22/10/20 at 06:34 AM Reply With Quote
Thank you for your replies - it is a 1999 carburetor R1 with 185/60/14 tires.
I will try the gear ratio calculator.

View User's Profile E-Mail User View All Posts By User U2U Member
adithorp

posted on 22/10/20 at 07:22 AM Reply With Quote
quote:
Originally posted by sdenne
Thank you for your replies - it is a 1999 carburetor R1 with 185/60/14 tires.
I will try the gear ratio calculator.


In which case the 3.54 will be pretty good. You'll be fast enough off the line and unlikely to have the power to rev' out at the top end.





"A witty saying proves nothing" Voltaire

http://jpsc.org.uk/forum/

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.