Newbie with a 2001 Cobra question...

Booya

New Member

Jul 10, 2004

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San Diego County

Jul 10, 2004

#1

• Jul 10, 2004

• #1

Hey all - This is my 1st thread here, and I just bought a 2001 Cobra. Looking forward to reading these forums... This stang is my 4th. I've had a 93 GLX convertible, an '87 GT, a '99 GT convertible, and now a 2001 Cobra.

This Cobra I just bought was from a used car dealership and the guy didn't know much about it other than it had H&R springs, Bilstien shocks, and a Tri-ax shifter. It also has a densecharger cold air kit...

My question is, I think the gears have been changed but I have no way of knowing for sure. My speeds at RPMs are:

70mph = 2600rpm
80mph = 2900rpm

Could you guys compare your rpm at these speeds to help me figure out what gears I've got? Thanks.

Chris M
San Diego County, CA

 

P

Price1

Member

May 11, 2003

109

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16

Dryfork, WV

Jul 10, 2004

#2

• Jul 10, 2004

• #2

Definitely NOT stock. Mine are 3.27's and I'm turning right around 2 grand @ 70. Maybe 4.10's as that's a pretty common package?? Maybe someone with replacement greats can chime in.

It's a sweet car, eh?? My formee ride was a '92 LX 5.0 and this is just a much superior all-around car.

 

Beau

Founding Member

Jan 29, 2000

3,050

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0

San Diego

Jul 10, 2004

#3

• Jul 10, 2004

• #3

It could be 3.73's or 4.10's. I can't find the link, but theres a site that lets you put in your wheel size, speed, and RPM and it gives you your gear ratio.

Welcome btw

 

tygr1

New Member

Jun 16, 2004

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SoCal

Jul 10, 2004

#4

• Jul 10, 2004

• #4

Gee, I raised the rear of mine and counted the revolutions...someone had installed 3:73s, much to my delight!

 

D

droptopsnake01

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May 12, 2004

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Jul 10, 2004

#5

• Jul 10, 2004

• #5

those are 4.10's.

 

MystiChrome Coupe

Founding Member

Nov 22, 2001

1,136

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OHIO

Jul 10, 2004

#6

• Jul 10, 2004

• #6

droptopsnake01 said:

those are 4.10's.

Click to expand...

Yup, that's what I remember my '01 with 4.10's turning. Check to see if you have a speedcal or a chip for correction the speedo.

 

Booya

New Member

Jul 10, 2004

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San Diego County

Jul 11, 2004

#7

• Jul 11, 2004

• #7

MystiChrome Coupe said:

Yup, that's what I remember my '01 with 4.10's turning. Check to see if you have a speedcal or a chip for correction the speedo.

Click to expand...

Where do I look for this?... I was thinking that they might be 4.10s also. First gear doesn't even get me across an intersection from a stop light... Thanks for all the replies.

 

cobra dave

New Member

Sep 1, 2003

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Jul 11, 2004

#8

• Jul 11, 2004

• #8

If you check the web there are gear ratio calculators. I think the last one i saw i searched (rear wheel to flywheel horsepower calculator) on msn and one site had a gear ratio calculator on it.

 

5

54life

New Member

Jul 24, 2003

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Cali currently at Ft. Rucker AL

Jul 11, 2004

#9

• Jul 11, 2004

• #9

i'm almost 100% certain those are 4.10's

 

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Morpheusgpr

Founding Member

Jan 28, 2002

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Indianapolis, IN

Jul 11, 2004

#10

• Jul 11, 2004

• #10

http://www.tchracing.com/tech/gearc...m&givenval=80&givenvaltype=MPH&selectedgear=5

 

Booya

New Member

Jul 10, 2004

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San Diego County

Jul 11, 2004

#11

• Jul 11, 2004

• #11

Morpheusgpr said:

http://www.tchracing.com/tech/gearc...m&givenval=80&givenvaltype=MPH&selectedgear=5

Click to expand...

Whoah... Accordig to that calculator, I should be at 2661 RPMs at 80, but I'm around 2900. Can any other '01 owners with alt gears confirm this?

 

M

Morpheusgpr

Founding Member

Jan 28, 2002

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Indianapolis, IN

Jul 11, 2004

#12

• Jul 11, 2004

• #12

Plug in 4.30 gears and see what it says.

 

M

Morpheusgpr

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Jan 28, 2002

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Indianapolis, IN

Jul 11, 2004

#13

• Jul 11, 2004

• #13

I went up to 4.56 gears and came out at like 2960 rpms...maybe someone wanted a **** load of gear in that car.

 

Booya

New Member

Jul 10, 2004

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San Diego County

Jul 11, 2004

#14

• Jul 11, 2004

• #14

I'm going cruising tonight and am going to get readings from other gears, speeds etc. Thanks for the link Morpheus.

 

S

soundguy

New Member

Apr 14, 2001

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Minneapolis

Jul 11, 2004

#15

• Jul 11, 2004

• #15

I happened to check my rpm's @70 on the highway today just by chance - 2K @ 70 w/3.27's - That means your readings indicate closer to 4.30's, but at least 4.10's. Based on how short you say first gear is, my guess is that you've got 4.30's in there.

 

Booya

New Member

Jul 10, 2004

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San Diego County

Jul 11, 2004

#16

• Jul 11, 2004

• #16

I just measured my speed/RPMs in every gear and checked them with the online calculator. For 2nd, 3rd, and 4th gear, the calculator says 4.10s almost to the number, but according to my 5th gear speed, the gear is past 4.30. Don't know what's up with that... Maybe my speedo or tach is off? Here are the speeds I observed. The first column is the gear and the 2nd and 3rd columns are my speeds at 2000 and 3000 RPMs:

GEAR .. 2000RPM .. 3000RPM
1st .. crawling... .. still crawling...
2nd .. 20MPH .. 29MPH
3rd .. 29MPH .. 42MPH
4th .. 38MPH .. 55MPH
5th .. 55MPH .. 82MPH

 

A

atvcrazy

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Jun 7, 2004

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Eastman GA

Jul 11, 2004

#17

• Jul 11, 2004

• #17

I have a 99 cobra with 4.10's, your rpms are a little higher than mine but not much

 

I

isdnmatt

Founding Member

Mar 22, 2001

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Smithtown, NY

Jul 12, 2004

#18

• Jul 12, 2004

• #18

My 01 is right around where youre saying. 4.10s here.

 

Booya

New Member

Jul 10, 2004

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San Diego County

Jul 12, 2004

#19

• Jul 12, 2004

• #19

isdnmatt said:

My 01 is right around where youre saying. 4.10s here.

Click to expand...

Thanks everbody. 4.10s it is....

 

tygr1

New Member

Jun 16, 2004

318

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SoCal

Jul 12, 2004

#20

• Jul 12, 2004

• #20

I really can't believe that you wouldn't want to PROVE to YOURSELF what freakin gears you have!! All this wasted bandwidth by you geniuses and NO ONE seems to know how to count it MANUALLY with NO error!

How can you possibly live with THINKING you have 4:10s but not really knowing for sure...nuts I'm tellin' ya'...nuts!