v8 cruise rpm, whats tooo much? - JeepForum.com

 
LinkBack Thread Tools
post #1 of 6 Old 12-03-2009, 07:38 PM Thread Starter
rodjr
Registered User
1980 CJ7 
 
Join Date: Sep 2008
Location: seattle
Posts: 380
v8 cruise rpm, whats tooo much?

the deal is possible sb chev swap. problem 4.10 gears, 31" tires 4spd. this puts 55mph at about 2700rpm. 55 is probably as fast as it will b used for any distance, but 2700 seems alot. whatda ya think?

rodjr is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 12-03-2009, 08:30 PM
keith460
Jeep. There's Only One
 
keith460's Avatar
1984 CJ7 
 
Join Date: Jan 2007
Location: Doylestown, PA
Posts: 6,620
2700rpm seams a little high to me especially when my 02 Ford F150 cruises @ 70mph while only doing 2000rpm and the tires are right around 32" diameter w/3.55 gears.

.
1984 CJ-7 Renegade
__________________
keith460 is online now  
post #3 of 6 Old 12-03-2009, 08:56 PM
trail58
Registered User
1958 CJ5 
 
Join Date: Aug 2009
Location: Louisiana
Posts: 31
As long as it's a good motor and you don't care about fuel consumption, have no fear. I run mine with 5.38 gears on 33 inch tires. Around 3000rpm at 55mph according to GPS. I've driven it to cruisin' the coast twice, 240 miles round trip. Only problem was stopping every 80 miles to fill up.I drove my 70 Ford 302 at 70mph (also 3000rpm) to North Carolina (800+ one way) with no problems.

1958 Willys CJ5 on a 71 Jeep CJ5 chassis, 231 Buick, Dana 30 front, Dana 44 rear, lockers, 5.38 on 33" tires.
trail58 is offline  
post #4 of 6 Old 12-03-2009, 09:29 PM
duffer
Registered User
1955 CJ3B 
 
Join Date: Jun 2008
Location: Bozeman
Posts: 692
Should be no problem. They seem to take 3200 just fine for cruising so I would not be too concerned.
duffer is offline  
post #5 of 6 Old 12-03-2009, 09:40 PM
kickingprop
Registered User
1985 CJ7 
 
Join Date: Jan 2007
Location: Houston, TX
Posts: 2,041
I assume the 4spd is the SM465? You could always add something like this to get an OD...

Ranger Overdrive

1985 CJ7 Project
Phase One : 5.3L Vortec/4L60E, Moser axles for AMC20, Twin Stick'd Dana300 - Completed
Phase Two: Bedliner, Rollcage, Seats, BESRK Rear Bumper w/ tire swing, Soft Top, and a few other goodies - Mostly Complete
Phase Three: Waggy 44 front, Scout D44 Rear, 4.56's, ARB's (F/R) SOA with YJ Springs, 35x12.50x15 BFG MT - Not Even Close to beginning

Also a mostly rust-free 1970 Scout 800A That I'll get to start working on someday...

Quote:
Chrome won't get you home...BUT Rattle Can Black may just get you back"
kickingprop is offline  
post #6 of 6 Old 12-03-2009, 11:02 PM
scooter
Registered User
1982 CJ7 
 
Join Date: Oct 2009
Location: ca
Posts: 217
If your using a non OD trans its gonna be a 1 to 1 ratio. Consider many 3/4 to 1 ton pickups came with 4.10 gears and pretty close to 31`s putting them where your at. Our 84 haywagon has 155K on the original everything with this setup.
scooter is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
What is the MAX safe cruise RPM for the 258 aero mech Jeep CJ Forum 3 09-08-2008 06:47 PM
Anyone in CA want cruise parts for 83 cj7 22kid Jeep CJ Forum 6 03-08-2008 08:44 PM
CJ7 Cruise Control MartijnH Jeep CJ Forum 4 03-14-2007 03:11 PM
Got the body off!! whats whats? humboldt_jeep Jeep CJ Forum 11 05-06-2004 05:37 AM
OHIO 4x4 Cruise In kingchango Jeep CJ Forum 0 04-22-2004 12:55 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome