Jetted or not jetted

[85Ram50]

If you install a non jetted head when you had a jetted head is there any other mods you need to do?

[pennyman1]

nope - just time everything properly and you are good to go. If mechanical lifters you need to adjust valve lash, but your 85 should be hydraulic lash adjusters.

[85Ram50]

Good to know Pennyman1. Just trying to run down the possible causes of poor MPG's. The head I replaced the old one with did not have jets. Any input on this thread? http://www.mightyram50.net/vbulletin/showthread.php/7885-Compression-test-leak-Down?p=70015#post70015

[dedave]

What cam did you use?

[85Ram50]

What cam did you use?

I just bought a head from these guys. https://www.ramscyl.com/ It was already built, just remove and replace. My G63B is SOHC

[dedave]

Are you using a new cam with possibly a new profile? Might change power/efficiency.

[geezer101]

Doubt a machine shop would add a custom grind cam to a reman'd head without charging a premium. Is there a difference between jet and non-jet intake manifolds? If there is - what are the chances of having a vacuum leak somewhere?

[Giovanni89]

I'd start with a compression test before you throw a bunch of parts and money at it.