• To celebrate the 4th of July, starting today (07/01/2025) all User Upgrades will be reduced by 10% (thru 07/08/2025) To use this special coupon use the code 2025-4th-10percent at check out. If you are already a supporter your existing package will be extended.
    Thank you for your support!
  • Hello Guest, we are proud to now have our Wiki online that is completely compiled and written by our members. Feel free to browse our Jeep-CJ Wiki or click on any orange keyword when looking at posts in the forum.

Simple? question about Timing

Simple? question about Timing

tvince

Jeeper
Posts
125
Media
3
Thanks
0
Location
KC MO
Vehicle(s)
1978 CJ7
I am having a hard time finding the RPM's to run when setting my timing chilton says go by the sticker on the vehicle. It is loooong gone I have a 78 AMC 258 i6 / 4.2l weber 38 I believe it should be around 8 - 10 btdc but not sure on the rpm's 1600 I have read but not sure just lookin for some input I cant believe I am having so much trouble finding definative info on this. Maybe its me.I set it at 8 at 1600 tonight but cant test it under load till I get my new driveshafts
Thanks all..... Again
 
I am having a hard time finding the RPM's to run when setting my timing chilton says go by the sticker on the vehicle. It is loooong gone I have a 78 AMC 258 i6 / 4.2l weber 38 I believe it should be around 8 - 10 btdc but not sure on the rpm's 1600 I have read but not sure just lookin for some input I cant believe I am having so much trouble finding definative info on this. Maybe its me.I set it at 8 at 1600 tonight but cant test it under load till I get my new driveshafts
Thanks all..... Again


Try 6-7 degree BTDC and see where the RPM sets im not 100% on the rpm's but 1600 seems a little high.
 
My little red Jeep 1978 service book says.... 8 degrees at 550 RPM for the 49 state models and if you are unlucky enough to have the Ca. version you would still do 8 degrees but at 850 RPM.
 

Jeep-CJ Donation Drive

Help support Jeep-CJ.com by making a contribution.

Help support Jeep-CJ.com by making a contribution.
Goal
$200.00
Earned
$0.00
This donation drive ends in
0 hours, 0 minutes, 0 seconds
  0.0%
Back
Top Bottom