|
|
|
|
Joined: Aug 2020
Posts: 2
Grease Monkey
|
OP
Grease Monkey
Joined: Aug 2020
Posts: 2 |
'35 Std Coupe: Trying to get to 60 mph from 40/45 max. 4:11 rear needs to be about 3:50: any help appreciated
|
|
|
|
JOIN THE VCCA and get access to the member-only features of the forum, including the ability to upload photos. You'll also receive our monthly magazine "Generator & Distributor". Yearly membership as low as $25!
|
|
|
|
Joined: Nov 2002
Posts: 7,472 Likes: 26
ChatMaster - 7,000
|
|
ChatMaster - 7,000
Joined: Nov 2002
Posts: 7,472 Likes: 26 |
If that truly is the max you can reach you have other problems. While I don't make a habit of it I can do 60+ with my 32 which has 4:11 gearing. Normally I will keep it at the speeds you posted but i have cruised at 55 MPH for several miles with no problems. To do so does require that the drivetrain is in good condition. My bigger concern is I don't really feel the car is totally safe at that speed .
Steve D
|
|
|
|
|
Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
|
|
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
A 1935 can easily cruise at 55-60 MPH with the 4.11 if the engine is in good condition.
Gene Schneider
|
|
|
|
|
Joined: Jan 2006
Posts: 418
Backyard Mechanic
|
|
Backyard Mechanic
Joined: Jan 2006
Posts: 418 |
Gene, while we on the subject of gearing, in my '54 3100 it has a 3.91 ratio rear end, which I believe as an option? Why offer a ratio that is not much
change from a standard 4.11? I can cruise very comfortably at 60-65 mph, btw.
Bobaloue
|
|
|
|
|
Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
|
|
ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The 1/2 ton trucks with a 216 engine through 1953 had a 4.11. In 1954 when the 1/2 ton got a 235 engine they reduced it to a 3.91 as so to give about the same performance with a (slight) reduction in engine speed. According to Chevrolets information it reduced the engine speed fro about 3100 RPM at 60 MPH to 2867 RPM.
This would allow the fuel economy to equal that of a smaller 216 engine.
You will find the drivers seldom exceeded 55 MPH in trucks due to engine noise in the small poorly insulated cab and fan noise from the larger truck fan.
With the 1950 dealer parts truck that I drove it was out of breath by 75 MPH due to the ack of streamlining where a car with a 4.11 could do 85 MPH.
Last edited by Chev Nut; 08/14/20 09:30 AM.
Gene Schneider
|
|
|
|
|
Joined: Jan 2006
Posts: 418
Backyard Mechanic
|
|
Backyard Mechanic
Joined: Jan 2006
Posts: 418 |
Thanks, Gene. Always appreciated. Bob
|
|
|
|
|
Joined: Oct 2004
Posts: 107
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Oct 2004
Posts: 107 |
Larger tire would help some..
carson told you this!!
|
|
|
|
|
Joined: May 2010
Posts: 822
ChatMaster - 750
|
|
ChatMaster - 750
Joined: May 2010
Posts: 822 |
35coope, A guy I know applied this method that I used on my '36 pickup to his '34 pickup with success. https://vccachat.org/ubbthreads.php/topics/334876/1936-chevy-3-55-rear-gear-conversion.htmlRon Daw on this forum made an ingenuous open drive conversion on a 1930s era transmission that allows him unlimited choices in rear axle ratios. It's amazing what can be accomplished if you throw away the rule book. Looking at what he did I can only say to myself "How come nobody else ever thought of that?" Ray W
Last edited by brino; 08/16/20 02:16 PM.
|
|
|
|
|
|
|
