390 initial timing
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Mountain Pass
Joined: Oct 2020
Posts: 118
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390 initial timing
I just rebuilt a .040 390 with new bearings, rings, cast flat top pistons, 268h cam, performer intake, edelbrock 600 carb, hei distributor, d2teaa heads and headers.
Before I had .040 390 cast flat top pistons, stock cam, ford dist with spark box, iron intake, edelbrock 600, d2teaa heads, and log manifolds.
I'm trying to get an idea of whether I should feel any power increase or not. It has 4.56 and np435. I hate that combo for daily use. Good offroad. It had no power before. Barely get out of it's own way. Also what initial timing should I shoot for. I've seen 6 and I've seen 14. It's at 10 right now. The other day I went to stomp on it and fell flat on its face. Maybe cause choke was on and vac advance isn't hooked up. I haven't had a chance to test drive it yet until I get the wiring harness.
Before I had .040 390 cast flat top pistons, stock cam, ford dist with spark box, iron intake, edelbrock 600, d2teaa heads, and log manifolds.
I'm trying to get an idea of whether I should feel any power increase or not. It has 4.56 and np435. I hate that combo for daily use. Good offroad. It had no power before. Barely get out of it's own way. Also what initial timing should I shoot for. I've seen 6 and I've seen 14. It's at 10 right now. The other day I went to stomp on it and fell flat on its face. Maybe cause choke was on and vac advance isn't hooked up. I haven't had a chance to test drive it yet until I get the wiring harness.
More Turbo
Joined: Mar 2018
Posts: 610
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From: Lacey
Just based on the parts combo differences, you'll definitely feel a difference in power. It's critical to know what your mechanical advance is giving the engine and what your total timing works out to.
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Mountain Pass
Joined: Oct 2020
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Choke was closed because it was 20 degrees and only was being started and moved to snowblow. Only has start, ignition, and alt right now. Waiting to get a full harness. Definately want to switch to 3.73 trac lock gears eventually. What setting should I set the accelerator pump to?
I think I estimated compression at 9:1.
I think I estimated compression at 9:1.
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