|
 |
|
|
These supercharger drive pulleys are
designed for the ScienceofSpeed Paxton 1200/1220 based Supercharger
System and Comptech Supercharger Systems
retrofitted with this kit
(this pulley is not compatible with CT-Engineering Novi 1220 based
supercharger kits).
Proper belt engagement is crucial as a slipping belt will cause the
supercharger to not spin reducing power. In several years of installing
these supercharger systems on the S2000, we have found what design and
materials work best. Compared to other pulleys available - these pulleys
fit right on the shaft of the supercharger (no grinding or sanding required), feature a belt
guide that prevents belt movement, and feature a durable yet high
traction anodize finish that reduces belt slip. |
|
|
|
 |
|
|
|
|
It is important to note that the accepted
industry practice to measure pulley diameter is at the top of the pulley
teeth. Our pulleys are measured and listed by this standard. Other
manufactures, including Comptech, do not advertise pulleys by this
standard.
ScienceofSpeed pulleys have extra flat "teeth" that aid measuring
diameter. ScienceofSpeed pulleys are engraved with diameter sizes
& part numbers to prevent confusion. |
|
|
|
approximate
pressure at redline (at sea level, at stock compression)
PLEASE NOTE: These
numbers vary drastically based on air density, intake efficiency, and charge
cooler design, so they should only be used as a very rough guide and are
provided as an estimate only. |
|
Novi 1220 |
2.0L |
2.2L |
|
Novi 1200 |
2.0L |
2.2L |
|
pulley size |
9000 RPM |
8000 RPM |
|
pulley size |
9000 RPM |
8000 RPM |
|
5.0" |
5 |
4 |
|
5.0" |
6.5 |
6 |
|
4.8" |
6 |
4.5 |
|
4.8" |
7 |
6.5 |
|
4.6" |
7 |
5 |
|
4.6" |
8 |
7 |
|
4.4" |
7.5 |
6 |
|
4.4" |
9 |
8 |
|
4.2" |
8.5 |
7 |
|
4.2" |
10 |
9 |
|
4.0" |
9 |
8 |
|
4.0" |
11 |
10 |
|
3.8" |
10.5 |
9 |
|
3.8" |
12.5 |
11.5 |
|
3.6" |
11 |
10.5 |
|
3.6" |
13 |
13 |
|
3.4" |
11.25 |
11.25 |
|
3.4" |
15.5 |
14.5 |
|
3.2" |
11.5 |
11.5 |
|
3.2" |
16 |
15 |
|
3.0" |
n/a |
12 |
|
3.0" |
n/a |
16 |
|
|
|
|
As a very general rule of thumb, with all things being equal our testing
has shown: |
-
each increase of 0.2" of pulley size
results in a pressure increase of 1 - 1.5 PSI (in the most efficient
operating area of the supercharger)
-
each increase of 1000 RPM results in a
pressure increase of 1 PSI
- Each 1 point of compression loss
results in 1 PSI of pressure loss
|
|
However,
this again varies by a number of factors -
including air density, intake efficiency,
and charge cooler design, so they should only be used as a very rough
guide. |
|
|
|
standard ScienceofSpeed Supercharger
Configuration Pulleys: |
- Stage 1 2.0L: 1220 4.8" (approx 6
PSI)
- Stage 1 2.2L: 1220 4.4" (approx 6
PSI)
- Stage 2 2.0L: 1220 4.0" (approx 9
PSI)
- Stage 2 2.2L: 1220 3.8" (approx 9
PSI)
|
Please note that supporting fuel system
(fuel & ignition controller / stand alone engine management, injectors,
regulator, & fuel pump) are required.
AP1 (2.0L, 9000 RPM) should not use smaller than 3.2", AP2 (2.2L, 8000
RPM) should not use smaller than 3.0". |
|
|
|
drive belts: |
|
Smaller pulleys will require a shorter
belt. The following belts are provided by ScienceofSpeed. Please specify
if you have a ScienceofSpeed Supercharger System or
Comptech System with
ScienceofSpeed retrofit. |
|
|
|
ScienceofSpeed Supercharger System: |
|
pulley size |
pulley part no |
belt part no |
belt manufacture |
|
4.8" |
enpp-1061.00.01.480 |
4060420 |
Goodyear |
|
4.6" |
enpp-1061.00.01.460 |
4060420 |
Goodyear |
|
4.4" |
enpp-1061.00.01.440 |
4060415 |
Goodyear |
|
4.2" |
enpp-1061.00.01.420 |
4060410 |
Goodyear |
|
4.0" |
enpp-1061.00.01.400 |
4060407 |
Goodyear |
|
3.8" |
enpp-1061.00.01.380 |
5060405 |
Dayco |
|
3.6" |
enpp-1061.00.01.360 |
4060400 |
Goodyear |
|
3.4" |
enpp-1061.00.01.340 |
4060400 |
Goodyear |
|
3.2" |
enpp-1061.00.01.320 |
4060395 |
Goodyear |
|
3.0" |
enpp-1061.00.01.300 |
4060390 |
Dayco |
|
|
|
|
Comptech Supercharger kit with
ScienceofSpeed retrofit: |
|
3.6" |
enpp-1061.00.01.360 |
4060380 |
Dayco |
|
3.4" |
enpp-1061.00.01.340 |
4060380 |
Dayco |
|
3.2" |
enpp-1061.00.01.320 |
4060374 |
Goodyear |
|
3.0" |
enpp-1061.00.01.300 |
4060370 |
Dayco |
|
|
|
|
Please note that for customers upgrading Comptech Supercharger systems,
the pulley mounting hardware from the original kit is not compatible
with the Novi 1200/1220. An optional pulley mounting hardware kit is
available below. |
S2000, all yrs