hoist,
on another thread you said you thought you have a lifter going bad...I have one(stock) that's bleeding down and clatters a lot on cold startup...are yours stock?...heard of any other 110" lifter failures?
Well let's do this here now.
Engine: Custom-built complete SE TC 110”, 120 HP/126.2 Ft-Lbs TQ before this rebuild. Retune to follow. New HD 110 cases (with my Serial Number) with Timken Bearing Conversion and Feuling #3030 case bolts, new S&S 4-3/8” Forged Crank, crank runout on pinion side is 0.0000” and 0’0005” on comp side (measured on a truing stand). New Thermal Coated CP Forged Pistons and New Rings, New Axtell 4” Cylinders; Modified SE 110 Heads modeled on a computer and flow bench by Cycle-rama, Ported, Decked, and Reworked Combustion Chambers, welded holes for ACR's and added Manual Compression Releases, Feuling #3048 exhaust studs & lock nuts, w/Cometic 0.030 Metal Head Gaskets for a 9.8:1 compression ratio; Thermal Coating of Exhaust Ports and Valves; TP Engineering ProVent Forged Rocker Box Covers w/integral Rocker Arm Supports and TP Roller Rockers and shafts; 62 mm HPI Throttle Body w/4.89 Injectors and Ported Manifold w/HPI High Flow A/C Assembly and Stock SERK 110 Cover. Engine has modified Cycle-rama CR 595 Gear-Drive Custom Cams w/S&S Gears; S&S Reed Valve Oil Breather; Feuling #4050 Race Series High Performance Lifters; Feuling #8015 Camplate with Oil Tensioner Block Off Plates and Feuling #8018 Pressure Relief Spring, Feuling #7969 Oil Pump, and Feuling #8020 Camplate/Oil Pump Fasteners; Feuling #4070 Race Series HP+ 0.120" Racing Adjustable Pushrods w/S&S PR Covers; Feuling #3000 High Tensile Shouldered Cylinder Studs and Head bolts; Feuling/ARP complete engine SS 12 Point Hardware; D&D FatCats w/Quiet Performance Muffler (which is not very quiet!).
Now for the failure. Unforunately no way of knowing what took what out, but the front intake lifter was wiped out. So was the cam. The wheel on the lifter wore flat on one side indicating it wasn't spinning. Other lobes on both cams are also worn, but not as bad. Vern thinks the cams might not have been hardened properly. That syncrap could've also caused slippage between the roller on the lifter til it statrted wearing a flat spot. The lifter could have taken the cam out. No way of knowing what came first.
Vern thinks that cam is too radical for a long lasting motor. He thinks it creates very volatile combustion and is very tough on the valve train. It makes gobs of torque right from the bottom, but at what cost?
Decision time!!!What cam to use now? How are the heads setup now with the valve springs? Don't know! They appear to be SE springs good to 640 lift, but not sure. Part of me wants to backoff from what's in there now and use an S&S 585 for longevity. But I'm afraid I might not be happy by giving that bottom end grunt I'm used to. Can't believe torque will be above 80 at 2 grand, while I have 100 now! Part of me wants to go bigger with the S&S 640! Don't want to over cam it again either. The bike was tuned perfectly to my current setup. I'd like to get fairly close and see if I can keep the tune.
What to do?? Any ideas on cams. Don't ask, but no Mackie, Zippers, or Cyclerama. He's not familiar with Bobby Woods stuff. But he likes to try to stay with current proven production cams as opposed to special custom stuff. He didn't design this engine and never got specs. So he can't properly determine what he'd like to see go in. He just knows I'll be way safe with the S&S 585.
Scott, do you have specs on your motor setup? I doubt I'll receive help myself from CR. I might just pull the heads and have Vern measure everything and come up with a combination that he thinks will work. He can check valve spring pressures and travel, and make sure the heads are setup for the cam we use. Hate to have to go that route when the top end is just fine. I'd like to just select a new cam, around .600-.615 lift, that might match up well to my current motor design. It ran like a MoFo, but too hard on the valvetrain. Any ideas gurus??
Thanks!
Hoist!
Added: I'll be now changing to S&S lifters with limiters, S&S pushrods, SE camplate and SE oil pump as I won't reuse that stuff with all that damage done. Finding the right cam, and deciding whether to pull the top end off is my conundrum!
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Topic: Cybil II, My New and Improved ‘07B FLHRSE3TQ (Read 153247 times)