EXPERTS, How to calculate compunded PSI #'s
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From: I play with Sand!!
EXPERTS, How to calculate compunded PSI #'s There is another thread going on right now where we are discousing this. This is a question I can't find an answer to.
https://ls1tech.com/forums/forced-induction/257495-compound-induction.html
https://ls1tech.com/forums/forced-induction/257495-compound-induction.html
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From: Spartan Country!
I didn't have time to read through that hole other post, but this is the answer I think you are looking for.
It's all about pressure ratios. Say your first compressor (turbo or SC) has a PR of 3. That gives you 29.4psig of boost though this formula, assuming your at sea level (ie. 14.7 = Atm):
(Atm+Boost)/Atm = PR
For your second compressor your Atm would be the product of your first compressor (29.4 here) plus 14.7 (to switch it from a gauge pressure to an atmospheric pressure). So use the same formula above but with 44.1 as your secondary Atm. So with a PR of 2.5 for our second compressor, the final boost pressure would be 66psig. Now go tractor pulling!
It's all about pressure ratios. Say your first compressor (turbo or SC) has a PR of 3. That gives you 29.4psig of boost though this formula, assuming your at sea level (ie. 14.7 = Atm):
(Atm+Boost)/Atm = PR
For your second compressor your Atm would be the product of your first compressor (29.4 here) plus 14.7 (to switch it from a gauge pressure to an atmospheric pressure). So use the same formula above but with 44.1 as your secondary Atm. So with a PR of 2.5 for our second compressor, the final boost pressure would be 66psig. Now go tractor pulling!
