Rear gear ratio
Melting Slicks
Joined: Apr 1999
Posts: 2,010
Likes: 3
From: Moon Twp. PA USA
What resistor? The inline can is what most refer to the tach filter and it is more than a resistor.
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
My tach reads 4k while cruising down the interstate and Ive got 700r4/355 combo , my ecm however reads like 1800
But I could believe you're tach is telling you 4450rpm when it's actually 3500rpm.
Safety Car
Joined: Sep 2007
Posts: 4,458
Likes: 331
From: Indy Indiana
1. your tach is off
2. your torque converter is slipping and not locking up at speed
3. your speedo is off, use a gps speedometer to confirm, or your smartphone.
4. crawl under the car and do the count the driveshaft rotation per wheel rotation thing.
2. your torque converter is slipping and not locking up at speed
3. your speedo is off, use a gps speedometer to confirm, or your smartphone.
4. crawl under the car and do the count the driveshaft rotation per wheel rotation thing.
Race Director
Joined: Oct 2000
Posts: 17,102
Likes: 7
From: Fair Oaks, OK
I have a '79 L-82 Automatic. Definitely 3.55's. pacecar620's RPM readings are much too high; much higher than mine.
