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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
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lukenz
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Post by lukenz on Jul 18, 2024 5:28:43 GMT -5
Thanks John for clarifying that, yea our workshop compressor is pretty grunty but still only has a maximum of 125psi so I guess Iām going to find out š could you have more than one connection on the compressor housing to aid in covering more exducer area?
Cheers,
Luke
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Post by racket on Jul 21, 2024 20:52:58 GMT -5
Hi Luke Yep , you could add extra injection points , I did on my 12/118 engine imgbb.com/6wd6NGL though never used Cheers John
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