DSM_Kola
Probationary Member
- 12
- 3
- Jun 28, 2019
-
Franklin,
Wisconsin
Hello everyone, I have Kelford 272's with some aem adjustable cam gears and I was wondering if others would look over all my measurements, there are a few things that I'm a little unsure about.
All of my Measurements
Intake Timing
When Cam gears are at 0 degrees
Open 5
Centerline 107
Close 45
When Cam gears are at 2 degrees retarded
Opens 3
Centerline 109
Closes 42
Exhaust Timing
When Cam gears are at 2 degrees Retarded
Opens 45 or 47?
Centerline 112
Closes at 1
Intake Valve clearances
When Cam gears are at 2 degrees retarded
20 .386
15 .325
10 .281
5 .247
0 .226
5 .215
10 .220
15 .235
20 .271
When Cam gears are at 0 degrees
20 .391
15 .334
10 .282
5 .247
0 .222
5 .213
10 .216
15 .231
20 .259
Exhaust Valve clearance
When Cam gears are at 2 degrees retarded
20 .312
15 .290
10 .275
5 .272
0 .282
5 .303
So the first thing that I was unsure about was that for the intake time it seemed odd that it was very close at the opening and centerline, but the closing event was 5 degrees off. The next thing was that when I was doing the exhaust timing I found that when I was doing the opening event and I waited some how it would slightly open like it was. For example I would find the opening at 0.040" at 45 degrees and I would wait a few minutes and it would be 0.047" and it would still be at 45 degrees. Should I take the initial measurement or account for the movement? Another thing is it normal to have that much valve clearance and should I just keep the cams set at Kelford specifications?
Would any of these things be caused by human error, like have I done anything wrong to cause these mishaps, being this is my first time degreeing anything. All advice helps
All of my Measurements
Intake Timing
When Cam gears are at 0 degrees
Open 5
Centerline 107
Close 45
When Cam gears are at 2 degrees retarded
Opens 3
Centerline 109
Closes 42
Exhaust Timing
When Cam gears are at 2 degrees Retarded
Opens 45 or 47?
Centerline 112
Closes at 1
Intake Valve clearances
When Cam gears are at 2 degrees retarded
20 .386
15 .325
10 .281
5 .247
0 .226
5 .215
10 .220
15 .235
20 .271
When Cam gears are at 0 degrees
20 .391
15 .334
10 .282
5 .247
0 .222
5 .213
10 .216
15 .231
20 .259
Exhaust Valve clearance
When Cam gears are at 2 degrees retarded
20 .312
15 .290
10 .275
5 .272
0 .282
5 .303
So the first thing that I was unsure about was that for the intake time it seemed odd that it was very close at the opening and centerline, but the closing event was 5 degrees off. The next thing was that when I was doing the exhaust timing I found that when I was doing the opening event and I waited some how it would slightly open like it was. For example I would find the opening at 0.040" at 45 degrees and I would wait a few minutes and it would be 0.047" and it would still be at 45 degrees. Should I take the initial measurement or account for the movement? Another thing is it normal to have that much valve clearance and should I just keep the cams set at Kelford specifications?
Would any of these things be caused by human error, like have I done anything wrong to cause these mishaps, being this is my first time degreeing anything. All advice helps