View Single Post
Old 08-16-2015, 08:43 AM   #26
motordr
Senior Member
 
Join Date: Nov 2010
Location: Beamsville,Ontario,Canada
Posts: 481
Default Re: COLUMBIA with 3.78 gears

Sponsored Links (Register now to hide all advertisements)
This is a great discussion, thanks for all your inputs!
So my 32 Vicky has a 4.11 Columbia. The tires are stock 18" Firestones, about 28+" tall. During a recent drive from Niagara to Maine along secondary roads it performed flawlessly. Especially through the hills of Vermont.
I have an acoustic tachometer app on my phone (RPM Gauge) that indicates 2220 RPM at 60 mph.
Driving locally,with mostly flat lands, my shift points are into 2nd at 15mph, 3rd gear at 25mph and OD at 40mph. Shift points are higher if I'm winding it through the gears obviously, but during normal leisurely driving I am in OD pretty soon.
The car pulls very well at low RPM even with a mild Winfield cam.
Prior to the Columbia install, I ran 3.54 gears with no problems except I wanted an extra gear on the highway.
So with you all have presented so far, I am leaning strongly toward a 3.78 Columbia in my coupe.
Now, where can I find an NOS ring and pinion? Ted
motordr is offline   Reply With Quote