High Pressure Avanti!

[mfg]

The maximum pressure output of a stock Paxton supercharger on an R2-3 Studebaker Avanti engine is determined by three things.....What are they?

[r1lark]

Quick stab at this: engine rpm, pulley diameter, and condition of the springs inside the blower?

[mfg]

4 minutes ago, r1lark said:

Quick stab at this: engine rpm, pulley diameter, and condition of the springs inside the blower?

You got two..(pulley diameter & RPM) and your third reason is a valid one, however, there's a more basic limiting factor which you missed.

Anyone ese want to take a stab here?

[brad]

The design of the impeller. The turbulence on the tips keeps them from producing any more boost beyond a certain RPM.

[mfg]

1 hour ago, brad said:

The design of the impeller. The turbulence on the tips keeps them from producing any more boost beyond a certain RPM.

Another good, technically valid reason indeed, however, the third major cause limiting blower pressure is much simpler.......Any other thoughts here?

[Gunslinger]

I'll say the flapper valve on the bonnet or carb enclosure which acted as a low tech waste gate to keep boost from getting excessive.  

[mfg]

2 hours ago, Gunslinger said:

I'll say the flapper valve on the bonnet or carb enclosure which acted as a low tech waste gate to keep boost from getting excessive.  

Actually, if the flapper valve is in good condition, it can hold back considerable pressure....That valve was used to vent gasoline vapors when the engine was shut down.

Not 'politically correct' today I might ad!!

Any other ideas on this question?

[grobb284]

Boost would relate to the valves timing as to opening and closing. A conservative cam would show more boost. A radical cam with more blow through less boost.

[regnalbob]

Make sure the belts are not slipping.

[mfg]

5 hours ago, grobb284 said:

Boost would relate to the valves timing as to opening and closing. A conservative cam would show more boost. A radical cam with more blow through less boost.

Good thought!

[mfg]

4 hours ago, Regnalbob said:

Make sure the belts are not slipping.

Simple as that!...That's #3...You 'nailed' it!