CHOOSING A CAM
CAMSHAFTS AND HYDRAULIC LIFTERS
4
The question What cam should I buy for my bike ?
is one we often hear. While there are no hard and fast
rules for picking a cam for a specific application, some
basic guidelines are worth considering. Keep in mind
that performance camshafts are usually chosen for the
basic purpose of producing more power from your
engine. The three questions to answer before choosing
a new cam are:
1. Primary application: Is the bike going to be used
for all around street riding or is the goal to have an
engine which is running at maximum torque and horse
power for track or drag racing?
2. Type of riding: Do you spend a lot of your time riding two up on highway trips or is it more important to
have the most power you can get. In other words is
your riding style conservative or more aggressive?
3. Engine/Bike combination: This question relates to
displacement (cubic inches), compression ratio, bike
weight and what kind of cylinder head
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Want more power from your new 88 engine? Andrews Products
has eight proven Twin 88 grinds for 2004 to get you there. More
HP and torque for stock or modified engines is within easy reach.
All cam grinds listed are designed for use with stock H/D hydraulic
lifters. Matching pushrods and heat treated steel sprockets are
listed on the preceding page. For any bolt in cam grind, EZ-install
pushrods do not require removal of gas tanks or rocker boxes for
installation.
TWIN 88: CHAIN DRIVE CAMS AND KITS
TOURING AND PERFORMANCE CAMS
Stock
(A)
-02/38
216
257
.473
.072
Stock
Carbureted engine: stock cam data listed for reference.
Carburetors
36/04
220
260
.473
.110
(Stock engine output is approximately 62 HP).
Stock
(B)
02/34
216
257
.473
.087
Stock
Fuel injected engine: stock cam data listed for reference.
Injectors
36/04
220
260
.473
.110
(Stock engine output is approximately 62 HP).
288121 TW21
10/30
220
255
.498
.134
Stock
Bolt in cam first i
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High Lift Springs for Evolution engines-used with titanium
spring collars, cam lifts of .550+ can be accommodated.
Installation does not require head machining.
Part #294150 (4 inner and 4 outer springs)
Titanium upper spring collars will fit all Evolution 80 engines.
Provides .050" more spring travel than stock collars. Collars are
stronger and 50% lighter than stock collars.
Part #293110 (4 titanium upper spring collars)
On September 7, 2002, at
Illinois Harley Davidson, John
Kownacki again won the dyno
horsepower shootout with an
astounding 165 hp and 151 ft.
lbs. of torque running an S S
113 engine in a 1994 FX
frame. The bike is owned by
John Kownacki of Chicago and
ridden on the street. Together
with Kownackis legendary tuning skill and a custom designed
Andrews camshaft, the bike
has won every shootout contest it has entered; 20 for 20!
(20 shootouts: 20 wins). The
sound and power of this engine
has to be seen up close to be
truly appreciated.
Every cams
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When installing cams with high lifts and long durations, a few general observations are worth keeping in mind. Remember that additional cam duration can produce more usable power but too much
duration may actually hurt overall performance. The problem of
poor engine response begins when too much duration results in
lower cylinder compression pressure (at low RPM) which in turn
can reduce low RPM torque and power. Too much duration in a
camshaft is not necessarily a good thing.
ENGINE TUNING INFORMATION
1. Using both top and bottom collars, place spring assembly in a
small vise and close the vise until the outer spring is solid. Be
careful when compressing springs in a vise!
2. Now measure the distance between spring lands as in diagram
and write down the number for later use.This is the Solid Height.
3. Calculate INSTALLED SPRING HEIGHT (min.) as follows:
INSTALLED HT.= Solid Height .060 Max. Valve Lift
4. Max. valve lift can be taken from catalog figures. For example,
m
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Andrews Products makes high performance cams for all EV
Sportster engines. All of the cams listed below will run to 6500
RPM with stock hydraulic lifters. Stock H/D hydraulic lifters are
very proven units and we recommend that they not be changed to
solid lifters. Andrews Products EV Sportster cams have stock
base circle sizes so stock (nonadjustable) pushrods can be used
(except V9 or BV). Adjustable aluminum or chrome-moly steel
pushrods are also available. Note: #2 cam drive gears used in
2000 and up EV Sportster cams uses 46 teeth; the '91-99 #2
gear has 36 teeth. 46 tooth gears will fit 91-99 #2 cams.
EV Sportster Adjustable Length Pushrods
Part #292020 . . . . . . . . . . . . . . (4 aluminum pushrods; '86-'90)
Part #292090
. . . . . . . . . . . (4 chrome-moly steel rods; '86-'90)
Part #292030 . . . . . . . . . . . . . . . (4 aluminum pushrods; '91 up)
Part #292085 . . . . . . . . . . . . (4 chrome-moly steel rods; '91 up)
EV Sportster Fixed Length Pushrods
Part #
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SHOVEL VALVE SPRINGS AND COLLARS
If you are installing cams in a shovel
engine, the valve spring collars and
related parts shown at left will make
things go a lot smoother. Our springs
and collars are designed for easy installation and maximum reliability.
Andrews Products pushrods are available for all Shovel
engines using stock diameter tubing so there is no cover
tube interference. Extra long or short pushrods can be made
up to order. Call us if you need them.
A. Aluminum Pushrods and Adjusters-quiet operation.
4 aluminum pushrods and adjusters . . . . . . . Part #240055
B. Chrome-Moly (4130) Steel Pushrods-maximum strength.
4 steel pushrods and adjusters . . . . . . . . . . . Part #240030
A. High Lift Upper Spring Collars: H/D 74/80 motors. Used with
high-lift springs, cams with .600 lift can easily be accommodated. Made from T6 aluminum, collars are light weight, hard coated and very strong.
4 high lift spring collars: . . . . . . . . . . . . . . . . . . . Part
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Duration
Valve
Lift @
Part#
Grind Timing(*)
.053
.020
Lift
TDC
Springs
Application Comments
Duration
Valve
Lift @
Part#
Grind Timing(*) .053
.020
Lift
TDC
Springs
Application Comments
Duration
Valve
Lift @
Part#
Grind Timing(*) .053
.020
Lift
TDC
Springs
Application Comments
291581 EV81
32/60
272
306
.610
.262
HI-LIFT
For 80-88 inches, 10.5+ C.R., head work. Broad
66/30
276
310
.610
.244
160 LBS.
nose, quick ramps for wide torque band. 6500+RPM.
291584 EV84
32/64
276
310
.640
.269
HI-LIFT
Quick ramps, broad nose type design means more
70/30
280
314
.640
.246
160 LBS.
power for 90-100 inch motors. 6500+ RPM.
291588 EV88
34/70
284
318
.680
.288
HI-LIFT
Same as above but more stuff for 100+ inch motors.
76/32
288
322
.680
.264
160 LBS.
Expert installation knowledge required. 6500+RPM.
212823 ('70) S82
32/60
272
306
.590
.237
HI-LIFT
74-84 inch Shovels with 10.5+ C.R. New design
212825 ('78)
66/30
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BIG TWIN TRANSMISSION BELT SPROCKETS
Fits all EV80 and Twin 88 5 and 6 speed transmissions, 29, 30, 31, 33 and 34 teeth available
POWER SPROCKETS:
29 Tooth sprockets . . . . 9% MORE RPM*
Part #290290 ('85-'93)
Part #290294 ('94-up)
30 Tooth sprockets . . . . . 6% MORE RPM*
Part #290304 ('94-up)
Part #290300 ('85-'93)
OVERDRIVE SPROCKETS:
34T sprockets. . . . . . . . . . 6% LESS RPM*
(180 RPM drop in engine RPM 60 MPH)
Part #290344 ('94-up)
Part #290340 ('85-'93)
*More RPM means more power; less RPM means
more MPH than stock 32 T sprocket.
POWER SPROCKETS:
31T sprockets. . . . . . . . . 3% MORE RPM*
Part #290314 ('94-up)
Part #290310 ('85-'93)
CRUISING SPROCKETS:
33T sprockets. . . . . . . . . . 3% LESS RPM*
Part #290334 ('94-up)
Part #290330 ('85-'93)
Sprocket Tooth Counts Ratios 1994-2001
(36 T clutch-25 T engine sprocket)
TRANS.
REAR WHEEL
OVERALL
29
70
3.48
30
70
3.36
31
70
3.25
32
(Stock)
70
3.15
33
70
3.05
34
70
2.96
29
65 ('95 sof
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26
Big Twin 4 speed transmissions have been built since 1936 in several versions. They were included on bikes with Knuckle engines,
Pans, Shovels and some '84 and '85 Evolution 80's. They all used
this transmission. With Andrews 4 speed gears, transmissions last
longer, shift faster, and just plain run better. Bikes with Andrews
gears feel so good that its hard to believe until you experience the
difference for yourself.
2.44 1ST GEAR SET (1959 thru 1984)
Part #201105 Best choice for Superglides, choppers and lighter
bikes with stock or smaller motor or trans sprockets. This is a no
clunk, 48 mph, 1st gear. Installation in '80-84 FX requires 21T
(1.82 ratio) 2nd gear for this 1st gear.
2.60 1ST GEAR SET (1959 thru 1984) (Not shown)
Part #201145 This gear set works best with E glides and heavier bikes with motor or trans sprockets having more teeth than
stock sprockets. Installation in '80-84 FX requires 21T (1.82 ratio)
2nd gear for this 1st gear.
3.00 1ST GEAR SET (Ori
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SPORTSTER GEARS (4 SPEED)
The gears listed on this page will fit Sportster 4 speed transmissions made from 1956 through 1990. All Andrews 4 speed Sportster
gears are made from high nickel alloy steel which is heat treated and shot peened for maximum durability. Shot peening greatly
improves the wear resistance of drive edges and slots. All Sportster gearboxes run better with Andrews gears.
(A) STOCK 1ST GEARS.
Part #251050 main 1st (27T) (replaces 35277-52A)
Part #251060 counter 1st (17T) (replaces 35760-73 late only,
1973-1985). To fit 1986 and later requires early countershaft
#259010
WIDE RATIO 1ST GEAR SETS (Not pictured)
Changes 1st from 2.52 ratio to 2.68 for more low end torque with
21T or 22T trans sprockets.
Part #251010 (late only, 1973-1985). To fit 1986 and later requires
early countershaft #259010
(B) STOCK 2ND GEARS.
Part #252020 2nd main (23T) (replaces 35296-56 56A)
Part #252040 2nd counter (20T) (replaces 35750-58 58A)
(C) STOCK 3RD GEARS.
Part #2
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SALES POLICIES
LIMITED WARRANTY POLICY
Payment Terms:
Visa and Mastercard payments for orders are accepted.
COD orders will be sent certified check or money order.
COD orders sent company check OK must be approved by
Andrews Products in advance.
Ordering Cams not listed in this catalog:
Cam grinds which are not currently listed in the catalog are
available as special orders. Custom ground or special order
cams are priced and quoted on an individual basis. Call for
information.
Foreign Shipments:
All foreign orders must be prepaid in U.S. dollars including
freight and forwarding charges. Andrews Products, Inc.,
will provide bank wire transfer information for foreign orders
upon request.
Shipping Carrier:
All shipments will be sent United Parcel Service (UPS)
ground service unless other arrangements have been
agreed upon in advance. All overnight shipping expense
will be charged to customer.
Claims of Shortages:
Claims of shipment shortages should be made to An
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