mfg Posted August 28, 2018 Report Share Posted August 28, 2018 The maximum pressure output of a stock Paxton supercharger on an R2-3 Studebaker Avanti engine is determined by three things.....What are they? Link to comment Share on other sites More sharing options...
r1lark Posted August 28, 2018 Report Share Posted August 28, 2018 Quick stab at this: engine rpm, pulley diameter, and condition of the springs inside the blower? Link to comment Share on other sites More sharing options...
mfg Posted August 28, 2018 Author Report Share Posted August 28, 2018 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? Link to comment Share on other sites More sharing options...
brad Posted August 29, 2018 Report Share Posted August 29, 2018 The design of the impeller. The turbulence on the tips keeps them from producing any more boost beyond a certain RPM. Link to comment Share on other sites More sharing options...
mfg Posted August 29, 2018 Author Report Share Posted August 29, 2018 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? Link to comment Share on other sites More sharing options...
Gunslinger Posted August 29, 2018 Report Share Posted August 29, 2018 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. Link to comment Share on other sites More sharing options...
mfg Posted August 29, 2018 Author Report Share Posted August 29, 2018 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? Link to comment Share on other sites More sharing options...
grobb284 Posted August 29, 2018 Report Share Posted August 29, 2018 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. Link to comment Share on other sites More sharing options...
regnalbob Posted August 29, 2018 Report Share Posted August 29, 2018 Make sure the belts are not slipping. Link to comment Share on other sites More sharing options...
mfg Posted August 29, 2018 Author Report Share Posted August 29, 2018 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! Link to comment Share on other sites More sharing options...
mfg Posted August 29, 2018 Author Report Share Posted August 29, 2018 4 hours ago, Regnalbob said: Make sure the belts are not slipping. Simple as that!...That's #3...You 'nailed' it! Link to comment Share on other sites More sharing options...
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