Post by racket on Jul 17, 2024 17:38:40 GMT -5
Hi Luke
To find a suitable position for the air supply hole , remove the comp outer housing and comp wheel , place the wheel into its shroud so that you can visualise the correct radial position for the air to impact the wheel , you want it to be orientated in such a way as to "theoretically " impact two exducer sections , so that theres a continuous supply of torque produced, hence my comment about drawing a line across two exducer sections .
If the hole is at too great a radius and only just impacts one tip you'll have less start power as that tip will only be in contact with the air for a limited time frame .
Also there are other "angles" that need to be taken into account, but if you look at the pic that Scott posted in your thread , several posting back , you can see a suitable arrangement .
71mm is a reasonable sized inducer so you might find your 125 psi isn't enough unless your compressor's air receiver is pretty large and has sufficient volume to sustain that 125 psi for a reasonable time frame to spoolup the engine , my little workshop comp pressure soon dies even with it running :-(
Cheers
John
To find a suitable position for the air supply hole , remove the comp outer housing and comp wheel , place the wheel into its shroud so that you can visualise the correct radial position for the air to impact the wheel , you want it to be orientated in such a way as to "theoretically " impact two exducer sections , so that theres a continuous supply of torque produced, hence my comment about drawing a line across two exducer sections .
If the hole is at too great a radius and only just impacts one tip you'll have less start power as that tip will only be in contact with the air for a limited time frame .
Also there are other "angles" that need to be taken into account, but if you look at the pic that Scott posted in your thread , several posting back , you can see a suitable arrangement .
71mm is a reasonable sized inducer so you might find your 125 psi isn't enough unless your compressor's air receiver is pretty large and has sufficient volume to sustain that 125 psi for a reasonable time frame to spoolup the engine , my little workshop comp pressure soon dies even with it running :-(
Cheers
John
