How does the size of the blower affect boost?
Aside from the possible differencein blower diameters, there are numerous things that will determine maximum boost levels. Cubic inches of the engine – more cubic inches means less boost. Cam Shaft specifications – lift, duration, and lobe center play a big part in boost levels.
How big of a blower do I need for a 370 CID engine?
The small bore blower (case thickness 3/4″+) is recommended for 370 CID engines or less for street applications. The larger bore blower is recommended for 371-500 CID engines in high performance, racing applications.
What’s the difference between small and large bore blowers?
There are two different 671 blowers commonly used. They are the larger diameter blower and the small diameter blower. The large bore blower (case thickness 1/2″-) is approximately 11 percent larger in volume than the small bore. The small bore blower (case thickness 3/4″+) is recommended for 370 CID engines or less for street applications.
How many rows does a blower drive have?
Blower Boost COMP RATIO 2 4 6 8 6.5 7.4 8.3 9.2 10 7 8 8.9 9.9 10.8 7.5 8.5 9.5 10.6 11.6 8 9.1 10.2 11.3 12.4
How are the boost levels on a blower determined?
The boost levels listed in our charts are based upon an average that was determined by 39 years of experience testing superchargers. These boost readings were measured at wide open throttle and with the engine under load at 6000 RPM using a large bore blower unless otherwise specified. There are two different 671 blowers commonly used.
What happens if the blower motor only works on high speed?
In other designs, the failure of 1 resistor means you lose only one speed. However, most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode.
Which is the best blower on the market?
It is better than just about any other blower we have tried. It also has considerable runtime, lasting for a little more than half an hour on a single charge in high power mode and 20 minutes or so when set to Turbo, which we found to be more than enough to complete a typical job.
How much pressure does a positive displacement blower produce?
Positive-displacement blowers provide a constant volume of air even if the system pressure varies. They are especially suitable for applications prone to clogging, since they can produce enough pressure – typically up to 1.25 kg/cm2- to blow clogged materials free.