RPM @ 70mph on 3.73s?

Reply Subscribe

Thread Tools

Search this Thread

01-31-2008, 03:03 PM

#11

N2O98gt

2nd Gear Member

Join Date: Jan 2008

Location:

Posts: 158

RE: RPM @ 70mph on 3.73s?

taking off is def something you have to practice and find somehting comfortable for you

01-31-2008, 03:42 PM

#12

cliffyk

TECH SAVANT

Join Date: Dec 2006

Location: Saint Augustine, FL

Posts: 10,938

RE: RPM @ 70mph on 3.73s?

Quote:

ORIGINAL: Ecstasy

wait, this is ticking me off then, i have 4.10s and at 70mph my rpms are at like 2500. shouldnt i be ata lower rpm since i dont redline till 7k?

[/align][/align]With your '97 and 4.10s, 2500 rpm @ 70 is right where it should be--5th gear in your tranny is 0.68:1, it's 0.62:1 in the 3650.[/align][/align]Here's my "what speed in what gear" calculator...[/align]

01-31-2008, 04:24 PM

#13

texas_stang02

3rd Gear Member

Join Date: Jan 2008

Location: Houston TX

Posts: 732

RE: RPM @ 70mph on 3.73s?

Quote:

ORIGINAL: cliffyk

Quote:

ORIGINAL: Ecstasy

wait, this is ticking me off then, i have 4.10s and at 70mph my rpms are at like 2500. shouldnt i be ata lower rpm since i dont redline till 7k?

what transmission came in the '97?

01-31-2008, 04:50 PM

#14

cliffyk

TECH SAVANT

Join Date: Dec 2006

Location: Saint Augustine, FL

Posts: 10,938

RE: RPM @ 70mph on 3.73s?

The '97 GT and Cobra had a Borg-Warner T-45 (I think they were still made by B-W, Tremec made trhe later T-45s).

02-01-2008, 06:26 AM

#15

Eagle2000GT

4th Gear Member

Join Date: Aug 2007

Location: Shelbyville, Indiana

Posts: 1,088

RE: RPM @ 70mph on 3.73s?

Quote:

ORIGINAL: euromay

Follow up questions: What RPM should I set my shift light at? Also, what RPM do I take off in first gearto not spin my tires so much? Sorry for all the questions but I'm really getting some good answers.

Basically, you want to shiftjust before youredline. That may be a little past peak power, but it allows you to have more power when you hit your next gear. I launch at 2000 and gradually push the gas pedal to the floor as the car gets traction. Going immediately to WOT is hopeless with street tires.