Verify Your Supercharger Plenum Boost Pressure With A Gauge

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
Hi, Im not sure with the pulley combination what boost this combo is giving. I have a 468, 6:71 blower, 35t blower pulley,39t crank pulley,8:1 comp and it seems by my calc on charts Im way over on boost in order to use 92 octane pump gas. Can someone explain how I use the calc of 11.4% overdriven into the mix to get the boost result?
thanks jim

maybe this is rather simplistic,but I can,t imagine running a super charger without a vacuum/boost plenum gauge along with,
a oil pressure gauge,
fuel pressure gauge,
and ignition advance gauge
and of course an OXYGEN sensor or two in the exhaust
and ideally an exhaust backpressure gauge
It just makes sense to monitor the engine functions,
why not record a pressure /vacuum gauge reading on a plenum connection
to get some facts vs assumptions ,
get actual facts on boost in the plenum,from a
hose connection to the intake plenum,
as it relates to the tack rpms, thus you get actual boost vs what might be the miscalculated expected pressure.



speedometer
http://www.summitracing.com/parts/atm-5156/media/images
gagespeedo.jpg


fuel level
http://www.summitracing.com/parts/vdo-301106/overview/
gagefuel.jpg

fuel pressure
http://www.summitracing.com/parts/atm-3363
gagefuelpressure.jpg

tach/engine rpm
http://www.summitracing.com/parts/vdo-333160/overview/
gagetach.jpg

oil pressure
http://www.summitracing.com/parts/vdo-350104/overview/
gageoilpressure.jpg

engine plenum vacuum
http://www.summitracing.com/parts/vdo-150042/overview/
gagevacuum.jpg

oil temperature
http://www.summitracing.com/parts/vdo-310106/overview/
gageoiltemp.jpg

coolant temperature (plus fan on indicator light)
http://www.summitracing.com/parts/vdo-310105/overview/
gagecoolant.jpg

trans fluid temperature (plus aux cooler fan on indicator light)
http://www.summitracing.com/parts/vdo-310107/overview/
gagetrans.jpg

battery voltage
http://www.summitracing.com/parts/vdo-3 ... dia/images
gagevolt.jpg


fuel/air ratio meter
atm-3378_w_ml.jpg

http://www.summitracing.com/parts/atm-3378
EXHAUST GAS TEMPS, one for each exhaust collector bank
really these are optional but nice to have

exgatemp.png

http://www.enjukuracing.com/products/SG ... nheit.html

https://www.glowshiftdirect.com/tin...MI_OmWzZ2g6wIVEfDACh3F4AQqEAQYAiABEgIA6fD_BwE

https://www.onallcylinders.com/2013/02/15/blower-basics-part-2/

https://theblowershop.com/tech-sheets/

http://dyersblowers.com/pulley_boost_charts.html

https://www.blowerdriveservice.com/TechnicalCharts

http://garage.grumpysperformance.com/index.php?threads/intellitronix-gauges-take-a-look.12281/

http://garage.grumpysperformance.co...-t-get-it-running-correctly.12495/#post-62966

http://garage.grumpysperformance.com/index.php?threads/digital-dash-swap-questions.3399/#post-26865
 
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