TWIN CAM CAMSHAFTS
Prices start at 386.00 for Chain
Cam Shafts for the Harley-Davidson Twin Cam
Including the 120R Twin Cam Race engine
Cams listed for chain drive can be ordered for all years in
gear drive including all Screaming Eagle style cams
Please Call for pricing and time frame.
All Black Widow Grinds are Designed using Master Lobe Technology!
Chain drive Cams starting at $386.00
Gear Drive starting $438.00
Other custom grinds also for gear drive.
S & S Gear Drive Set of 4 gears and hardware kit Retail $479.50
Our camshafts are engineered to give the closest to correct EFFECTIVE compression.
EFFECTIVE and Dynamic compression are completely different: The engine does NOT see any compression until the intake valve closes. That is the “effective“ compression ratio. Dynamic is when the engine is running with the air going through it. Most stock engines work well with 7-1 effective comp with pump gas. Aluminum heads lose efficiency, heat LOSS, so you can go a half point higher. Cast iron wedge Heads are VERY efficient! Hemi chambers have a LOT of surface area so the piston dome also has a lot of surface area. That = heat LOSS
“pent roof” chambers are the best! Minimum surface area, least amount of total ignition advance is required.= GREAT NEWS !! for the M-8 owners.
Another point is that three cams can have the same duration at .050” tappet rise but the seat timing can vary as much as 10-15 degrees. And the duration up the flanks are also different That is why I calculate the intake closing point at the VALVE with what ever rocker ratio and lash is being used. There is too much BS in the advertising mags !! Just as a cylinder head port wants to see duration where it needs duration to function.
BW-39 the original Black Widow Bolt in cam in 2000 used by several H-D dealers and as Pete Hill Says these cams really turn on a stock engine back in inventory soon by popular demand.
Black Widow Cams bolt in style cams for earlier 99-05 in gear drive are special order: lobe sizes are listed: For Racing Lobes Please contact us
Dur. Lobe" for 2007 up
@.053 lift
BW-256hr303T BW-244HR325
BW-248HR327
BW-236HR340
BW-251hr3125T BW-240HR345
BW-248hr303T BW-244HR340
BW-248HR345
BW-246HR375
BW-238HR360
BW-XXXhrXXXT BW-244HR360
BW-247hr3125T BW-252HR360
BW-236hr311T BW-244HR382
BW-228hr312T BW-254HR382
BW-XXXhrXXXT OTHER PROFILE'S TO BE ADDED SOON
We have many profiles not listed above for both Mechanical and Hydraulic
Lifters. We supply Lifters.
Camshaft description BW-48 (chain drive) Gear Drive special order 1999-Present
Works for 88"-95" motor. Great low-end and mid range power. Good for bikes that get run in the mid to higher RPM range. Standard performance upgrades really turns this cam on !!
Need different valve springs. Works with carbureted or EFI.
Camshaft timing information measured @ .053
OPEN CLOSE TDC DURATION VALVE LIFT
Intake 20 48 .184" 248 .532"
104
Exhaust 52 16 .166" 248 .532"
108
Overlap 36 LSA 106
Camshaft description BW-49- Gear Drive special order
For 2007 and up only
This cam was Originally Made for my good Friend
Perry Kime of FLO Headworks In Oceano California.
Same ramp design as our BW-48
Perry Says this cam works great for two up riding.
Perry is a great head guy also if you are in California or Close you should give him a call. Perry is a former employee of Crane Cams in the old days and learned from the best as I my self also Studied Under Harvey for 16 Years !!
Other FLO Head Works profiles are available in gear drive-Special order.
Camshaft timing information measured @ .053
OPEN CLOSE DURATION VALVE LIFT
Intake 20 48 244 0.525" 104
Exhaust 52 16 248 0.525" 108
Overlap 36 LSA 106
Camshaft description BW 55 2007 and up-Chain Drive Gear Drive is special order
These Chain Drive Cams where in the 2012 Buffalo Chip Bike Build along with Terry Components. This cams has nice power thru the range with out a lot of the extras needed( ie: head work or high compression) for the ones who want to save money. BW-55 Keith Terry was very pleased with the results and the way the engine performed as this profile was designed for the 96" engine - Making 90+ HP /105Tq
These same cams in a stock 103 with pipe 95+Hp & 110+ Tq After Tuning
WHAT IS OVERLAP ?
These cams get from .004" to .053" in only 32 degrees as our competitors cams get only from .020" to .053" in 36 degrees the result is better manifold vacuum, do to less non-advertised overlap also referred to By HARVEY J. CRANE as the cross over area so better engine acceleration thru the range.
The BW-55 for 96" BW-47 & 44-For the larger cubic inch engines like 103 and or engines with slightly higher compression ratio.
BW-62 designs are of the same ramp up design for those who have ported heads
with added on big bore cylinders and compression.
Quicker ramp up means a Great cam for big bike and even the lighter ones.
Camshaft timing information measured @ .053
OPEN CLOSE DURATION VALVE LIFT
Intake 20 36 236 0.555"
98
Exhaust 44 18 242 0.555"
103
Overlap 40 LSA 100
Camshaft description BW 62 2007 and up-Chain Drive Gear Drive is special order
Camshaft timing information measured @ .053
OPEN CLOSE DURATION VALVE LIFT
Intake 22 42 244 0.620" 102
Exhaust 55 19 254 0.620" 108
Overlap 38 LSA 106
Camshaft description BW 44 2007 and up- Chain Drive Gear Drive is special order
These cams wth minor Head work yield 110/118 Tuner used PC SE AC kit True Duals 103"
These same cams stage 1 ported heads 50mm TB SE super tuner True Duals in 107"
made 114/119 The power with our cams is endless!!