Looking for a new Ford 8.8 IRS

Main Menu

Portal
Forums

Nevada Classics

Advertise at CC

March 2026

S	M	T	W	T	F	S
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30	31

CC Advertisers

· Kirkham Motorsports
Superformance
· Finish Line
· Hurricane Motorsports
· Serpent Express
·
· Planet Cobra

· Shell Valley Classic Wheels
· Eight Stack Injection

LinkBack

Thread Tools

Display Modes

#11 (permalink)

03-02-2009, 11:54 AM

priobe

CC Member

Join Date: Mar 2004

Location: miami, FL

Cobra Make, Engine: E-M Cobra Ford FE 427 w/ Webers 48 IDA

Posts: 1,383

Not Ranked

Great.... nothing is ever easy

The 3.31 gear is Motive and the 3.27 or 3.55 is FMS.

Ford does not make a 3.31 damn it decision decision.

I was prefering 3.31.

I did you the calc for tire size which is 25 in.

Here is the breakdown at 60 mph

Keep in mind I am currently at 3000 rpm @ 60 mph = 3.73

1. 2500 rpm @ 60mph = 3.08
2. 2650 rpm @ 60mph = 3.27
3. 2700 rpm @ 60 mph = 3.31
4. 2900 rpm @ 60 mph = 3.55

« Previous Thread | Next Thread »

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 On Pingbacks are On Refbacks are On Forum Rules

All times are GMT -7. The time now is 04:53 PM.

Contact Us - Club Cobra Home - Archive - Top

The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy

Links monetized by VigLink