Rpm question
Thread Starter
Racer
Joined: Feb 2009
Posts: 320
Likes: 0
From: shelbyville TN.
Rpm question
I have a c5 with 6 speed an I'm turning 1500 rpm at 70 mph and a buddy of mine has a c5 with automatic an he's turning 2500 rpm at 70 mph , I understand that I have six gear's but still 2500 rpm at 70 mph for him seem's like alot is that normal?
Safety Car
Joined: Oct 2003
Posts: 3,699
Likes: 16
From: Sun City- Menifee Calif.
What gear are you in going 70 at 1500 rpm?
Team Owner
Joined: Jul 2006
Posts: 22,156
Likes: 4,168
From: Kannapolis NC
If the automatic has 2:73 gears, he should be turning 2730 rpm in 3rd gear and 3150 if he has 3:15's. You should be turning 3420 rpms in 4th gear with 3:42's with the 6 spd. All this is at 75 mph in the gears noted.
Last edited by 65GGvert; Feb 18, 2010 at 09:15 PM.
Pro
Joined: Sep 2003
Posts: 668
Likes: 35
From: Lantana, TX
My auto would sit around 1800 in 4th (OD) around 70 on the freeway if I remember correctly. I've since replaced my stock 2:73 gears with 3:42 gears and now it's around 2200 in 4th at the same speeds... these numbers are from memory, I haven't driven all winter 
so they may be off slightly.
so they may be off slightly.
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