User Guide

68—Dyno2000 Advanced Engine Simulation

The first four basic timing points (IVO, IVC, EVO, EVC) pinpoint the “true” begin-

ning and end of the four engine cycles. These valve opening and closing points

indicate when the function of the piston/cylinder mechanism changes from intake to

compression, compression to power, power to exhaust, and exhaust back to intake.

For much more in-depth information about cam timing, refer to the complete book

DeskTop Dynos

available from Motion Software.

Camshaft Menu Choices

The Camshaft menu contains five camshaft “grinds” that are listed by application:

Stock Street/Economy Profile

, 2)

High Performance Street Profile

, 3)

Dual Pur-

pose Street/Track Profile

, 4)

Drag-Race/Circle-Track Profile

, and 5)

Drag-Race High-

Speed Profile

. Any of the three lifter types (described later in this chapter) can be

applied to these cam profiles, adjusting the acceleration rates from mild to very

aggressive. When any of these cam profiles are selected, the seat-to-seat IVO, IVC,

EVO, EVC, Intake Centerline, Intake Lobe Center Angle, Intake Duration, and Ex-

haust Duration are loaded into the CAMSHAFT category along with the camshaft

description. Valve lifts can be manually entered or automatically calculated by the

program (refer to the following Notes).

Note 1:

The

intake

and

exhaust valve lifts

for any of the camshafts listed in the

Camshaft Type

drop-down menu can be automatically calculated if you choose

Camshaft Modeling

ISKY Cam Catalog

Several of the “generic” grinds included

in the Dyno2000 Camshaft menu were

modeled after profiles from the ISKY

CAMS catalog.

CamDisk™ With 3500+ Camfiles

The new CamDisk2™ from Motion Soft-

ware includes over 3500 camfiles with ap-

plication info. It’s the fastest way to load

and test cams in the Dyno2000.