Cold Start Lifter Noise
#1
Cold Start Lifter Noise
I'm dealing with loud lifter noise on cold startups 40-50 degrees, first start in the morning. New Build, less than 200 miles:
07 FLHTCU
107 CI with CP 107 flat tops
Heads ported, 1.900 intake valve, 1.625 exhaust valve, springs 160 seated force
Wood TW-777 cams
SE taper adjustable pushrods
Comp Cams 850-1 Lifters
Cold start lifter noise for about 2 minutes 40-50 degree F.
Once she has quieted down, the lifter noise is just above normal for any rpm or load.
Any clue to why the heavy lifter noise for so long and so loud?
07 FLHTCU
107 CI with CP 107 flat tops
Heads ported, 1.900 intake valve, 1.625 exhaust valve, springs 160 seated force
Wood TW-777 cams
SE taper adjustable pushrods
Comp Cams 850-1 Lifters
Cold start lifter noise for about 2 minutes 40-50 degree F.
Once she has quieted down, the lifter noise is just above normal for any rpm or load.
Any clue to why the heavy lifter noise for so long and so loud?
#3
#4
#7
I really think these lifter bleed down faster than the stock Harley B lifters, and for some reason they pump up slower. I realize the heaver valve springs I'm running apply more force down the pushrod and help bleed the lifters down when stopped.
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#8
That is possible. If I adjust them deeper wouldn't it have the same effect as a 875-1? My understanding, the 875-1 is a 850-1 with travel limiters. 850-1 have .200" of travel and the 875-1 have a travel limit plate .100" thick, so the travel is half of the 850-1 or .100". If you would adjust the 850-1 deeper to .150" deep, it would be like the 875-1.
I really think these lifter bleed down faster than the stock Harley B lifters, and for some reason they pump up slower. I realize the heaver valve springs I'm running apply more force down the pushrod and help bleed the lifters down when stopped.
I really think these lifter bleed down faster than the stock Harley B lifters, and for some reason they pump up slower. I realize the heaver valve springs I'm running apply more force down the pushrod and help bleed the lifters down when stopped.
#9
Probably not a problem with the seat pressure. Have you checked lifter bores? Feuling makes oversized lifters for bores that are on the big side. if you check them and discover one of the bores is on big side, they will sell you individual lifters allowing you to run some of the oversized In larger bores and the standard in others. It's a little disappointing to hear you've got this noise issue with so few miles. I was strongly considering those lifters for the build I'm about to start.
Last edited by 1931jamesw; 01-02-2012 at 11:03 PM.
#10
Probably not a problem with the seat pressure. Have you checked lifter bores? Feuling makes oversized lifters for bores that are on the big side. if you check them and discover one of the bores is on big side, they will sell you individual lifters allowing you to run some of the oversized In larger bores and the standard in others. It's a little disappointing to hear you've got this noise issue with so few miles. I was strongly considering those lifters for the build I'm about to start.
If there is no change, than I'm dealing with the aggressive ramps of these cams and now figure out if there is lifters that will reduce the start up noise. From talking to Bob Woods, he never stated the start up noise would reduce with his lifters, just that they take a very long time to bleed down. And again while riding or idling after start up, there is no real concern of the lifter noise, but cold start up lifter pump up is concerning.
Last edited by Hog Yild; 01-03-2012 at 07:21 AM.