Discussion in 'Early CJ5 and CJ6 Tech' started by Tom Stephens, Apr 10, 2019.
My compression readings: #1 = 106, #2 = 106, #3 = 105, #4 = 109
Too low, or just fine?
Not too bad for a used f-head. The good news is that they are all very close to the same.
^ I agree with Pete, the even numbers are good news!
I agree about the even numbers. I wonder if rebuilding would help the power output?
It's an F-head. What power output?
New would be in the range of 120-125, bad would be 80-90. If you're not burning oil I'd drive like I stole it.
Howard, it spills oil, it doesn't burn it ;-) I was checking the oil canister to see if it had a filter inside (so I could order a new one), and didn't get the gasket straight, it got oil EVERYWHERE, all over the engine, even in the passenger compartment.
Perhaps I should start a new thread, let me know if I should, but I'll try this here: I found some old threads on replacing the carb (I have a Solex) with a Weber 32/36, or changing the ignition or doing both to get more power. I know "power" is not really the word, but I'd like to get 50-55mph up one of our 3-4% grades. I was doing 45mph the other day.
Cruising at 45mph is just right for an F-head, as frequently discussed here. They were intended for off-road applications and their design precludes any easy power upgrades.
Hell, I have trouble getting 55mph out of my '88 YJ, on any noticeable uphill. Jeeps have the aerodynamics of a brick.
Make your second Jeep a V6 and use that one on the highway.
Blew a cartridge filter clean off my M-715. Rustproofed that engine bay! And twenty years later you can still see the stain on the side of the house.
55 up slight grade, ant going to happen.
They seem close.
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