Cold Start Lifter Noise
Thread Starter
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Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
Harley B Lifter to the left, CompCam 850-1 to the right.
You can see the difference in the hole diameter in the pushrod cup, also I didn't measure it but the cup the pushrod rides in seems to have more spherical contact area with the push rod.
The side oil hole is machined on a angled surface of the Harley lifter vs flat into the lifter body of the Comp Cam.
The Harley lifter body appear thicker and the clip diameter larger.
Not sure how all this affect performance.
You can see the difference in the hole diameter in the pushrod cup, also I didn't measure it but the cup the pushrod rides in seems to have more spherical contact area with the push rod.
The side oil hole is machined on a angled surface of the Harley lifter vs flat into the lifter body of the Comp Cam.
The Harley lifter body appear thicker and the clip diameter larger.
Not sure how all this affect performance.
Thread Starter
|
Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
Ok all fired up, 3 turns on the Se Adjustables, it is a bit quieter and down to about 1 minute to settle down.
It is colder today than before, 35 out. I'll check it in the morning and see what is does.
It is colder today than before, 35 out. I'll check it in the morning and see what is does.
Thread Starter
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Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
I didn't check this morning, It's colder than I expected. I have to run home at lunch so I'll do it than. I really don't expect much difference between the 850-1 and my stock B lifters in time required to pump up. With my lifter bores to lifter diameter, I'm getting very close to the .002 with the B lifters and actually the 850-1 would be a better choice to tighten up that tolerance. I can play with the depth of the "B' as I had with the 850-1. I expect similar results between the two.
My conclusions this far, I think the 850-1 lifters are very comparable to the Harley B lifters. I would not hesitate in using them as the go to lifter for direct replacement for Harley B Lifers.
I am running a Woods cam, known to be one of the cams giving more torque and hp, but also known to be one of the more aggressive cams designs out there.
He provides lifters for a reason, I also see most builders using Woods cams also using his lifters. Is this my next step?
My conclusions this far, I think the 850-1 lifters are very comparable to the Harley B lifters. I would not hesitate in using them as the go to lifter for direct replacement for Harley B Lifers.
I am running a Woods cam, known to be one of the cams giving more torque and hp, but also known to be one of the more aggressive cams designs out there.
He provides lifters for a reason, I also see most builders using Woods cams also using his lifters. Is this my next step?
Last edited by Hog Yild; Jan 5, 2012 at 06:59 AM.
Thread Starter
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Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
My thoughts are more on line with:
I am running on the high side of clearance, lifter bore to lifter OD. I have chosen to run a high performance cam that is known for it's aggressive ramps. My valve spring pressure is higher than stock. I'm sure if you add all of this up, I am seeing more side loading in the lifter bores for one. Not sure what that does to pump up, specially at colder temps. But I'm also guessing when the engine sits for a longer period of time, the extra pressure helps bleed out the lifters sitting on the lobes. Next an assumption on my part, with more aggressive ramps on the cams, the time to allow the lifters to pump up may be shorter? And this is probably the biggest thing, the "icing" on the cake, I'm working at startup temps in the 30s and 40s right now.
Again when warmed up the valve train is really not much different than I had before, it's a bit louder, but you have to listen for it. Last time I road, it was in the 60s and my oil temps were around 200 f. No problems with start up after a few hours.
Thread Starter
|
Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
I didn't check this morning, It's colder than I expected. I have to run home at lunch so I'll do it than. I really don't expect much difference between the 850-1 and my stock B lifters in time required to pump up. With my lifter bores to lifter diameter, I'm getting very close to the .002 with the B lifters and actually the 850-1 would be a better choice to tighten up that tolerance. I can play with the depth of the "B' as I had with the 850-1. I expect similar results between the two.
My conclusions this far, I think the 850-1 lifters are very comparable to the Harley B lifters. I would not hesitate in using them as the go to lifter for direct replacement for Harley B Lifers.
I am running a Woods cam, known to be one of the cams giving more torque and hp, but also known to be one of the more aggressive cams designs out there.
He provides lifters for a reason, I also see most builders using Woods cams also using his lifters. Is this my next step?
My conclusions this far, I think the 850-1 lifters are very comparable to the Harley B lifters. I would not hesitate in using them as the go to lifter for direct replacement for Harley B Lifers.
I am running a Woods cam, known to be one of the cams giving more torque and hp, but also known to be one of the more aggressive cams designs out there.
He provides lifters for a reason, I also see most builders using Woods cams also using his lifters. Is this my next step?
So I rode back to work, will see in about 4 hours again.
Last edited by Hog Yild; Jan 5, 2012 at 02:15 PM.
Thread Starter
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Road Master
Joined: Jul 2006
Posts: 886
Likes: 4
From: Virginia
New Woods lifters in last night, tapping away at first, I assume till the thin oil was replaced by the 20w-50. Highs in the mid 40s today, I'll go home and start it up at lunch. I expect it to be quiet.
Just a note with Woods lifters, the light oil bleeds down very quickly, with adjustable pushrods, they have bled completely down in about the time it takes you to tighten the lock nut on the pushrod. Now after they have regular engine wt oil, Bob warns if you adjust them, it may take overnight for them to bleed down till you can turn them with your fingers.
Just a note with Woods lifters, the light oil bleeds down very quickly, with adjustable pushrods, they have bled completely down in about the time it takes you to tighten the lock nut on the pushrod. Now after they have regular engine wt oil, Bob warns if you adjust them, it may take overnight for them to bleed down till you can turn them with your fingers.
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Tourer
Joined: Jun 2011
Posts: 473
Likes: 1
From: Largo Fl
So the lifters seemed to be the problem? I have a 07 ultra classic with a stage 1 kit. The internals are stock as far as I know. Mine does the same thing on cold mornings. Its gone by the time I literally get 3 houses up the street. It was so loud I thought it was a loose exhaust baffle or clutch chatter but it was definitely from the right side of the bike so I ruled out clutch noise. This might be my issue also. Any point to changing lifters other than getting rid of the rattle? I live in Florida so my cold morning are few and far between, if its not hurting anything I would just rather let it be. Any thoughts?