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What is the spark plug gap setting for a 350 Chevy crate motor zz4?
Wiki User
∙ 16y ago
For AC Delco spark plugs part number FR5LS or equivalent, the correct gap is .035 (GM Specifications). If using AC Delco RapidFire #5 plugs, the gap is .045 (can be used for: FR3LS, FR3LS6, FR2LS, 41-603, FR3LSJ, FR4LSJ, and FR5LS)
Wiki User
∙ 16y ago
Wiki User
∙ 12y agoI have a 1985 Winnebago Chieftain with a Chevy 454 engine. I was told to gap the spark plugs to .044. The ones I took out were in there for a long time and had a gap of .05. The plugs that I bought were pregapped at .04. I got lousy gas milage at .04, I am going to try .044 and see if this improves my milage.
Wiki User
∙ 15y agoAccording to the 1963 Chevrolet Truck Shop Manual (Page 6-14) both the 230 and 292 have the same firing order 1-5-3-6-2-4. The cylinders are numbered from front (1) to rear (6).
Other tuneup specs from the manual (Page 6-3) are as follows:
Spark Plugs - AC 46N
Gap - .035
Dwell - 31 to 34 degrees
Point Gap - .019 (new) .016 (used)
Timing - 4 degrees BTDC (at idle speed with vacuum advance line disconnected and plugged.
Idle Speed (manual)450-500 rpm
Idle Speed (powerglide)450-500 with powerglide in drive.
Have fun!
Wiki User
∙ 17y agoUnless your radiator support decal says different, it is .045
Wiki User
∙ 15y agoListed in the owner's manual and under the hood on a placard.
Wiki User
∙ 14y ago.035 is spark plug gap 30 degrees is the dwell setting
Wiki User
∙ 10y ago.035 non hei
.045 with hei
Wiki User
∙ 9y ago0.06
Wiki User
∙ 15y ago.035
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