Smoke, Smoke Options

[Boothy]

Cheers all!

Sorry, but I again need to ask for help.

New engine blowing smoke. 1.7 punched out to 2.0 with a big bore kit. Cam, Weber 40s. It started and ran pretty well late last fall. Used engine break-in oil as recommended. No smoke but sluggish acceleration -fine at high RPM.

With the warm weather (finally) I swapped out the Weber jets to the recommended .50, 1.50, and 1.95. Ran it up to 3300 with a timing light. I remembered I did static timing but not dynamic. Now it sounds pretty good but I'm seeing light blue smoke and a really black exhaust. I don't think the jets were that different but no markings so not sure.

My immediate horror was a broken ring -I really don't want to pull the engine again. It idles fine and sounds strong. I'll do a compression check. When it idles, there's no smoke. When I bring it up, it begins to smoke a little. Then it's consistent—no horrible but noticeable.

It sounds strong. It idles nicely at a 1000 and revs up fine. I'm hesitant to push it until I figure out what's going on. Changed the oil to 20W-50. Could it be, with the soot on the tailpipe, my jets are wrong? Stretch I know but hopeful. Heads are new so the oil in the guides shouldn't be an issue.

As always, thanks in advance!

[emerygt350]

I found my driver's side is a pain too. I use a regular gasket with a little coating of the high temp gasket maker I can't remember the name of on all surfaces. It holds the gasket in place too. I tried the thick gasket but no go leaked awful (tried that twice). Make sure you watch that cover as you slip the clip on, mine really likes to move.

Thought about bringing it to a dyno and jetting it professionally? Do you have an afr gauge?

A vacuum gauge can tell you all about what is going on in your engine as well.

https://m.roadkillcustoms.com/diagnose-comm...s-vacuum-gauge/