Old Sep 30, 2013 | 04:13 PM
  #19 (permalink)  
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Silverarrow
Joined: Dec 2011
Posts: 283
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From: Sweden
Default Re: Boost comparison - 65mm and 61.9mm pulleys

Originally Posted by Billy22Bob
Ok - more yawn factor.....
What I've tried to do below is show the effect of more cooling via a supercooler or similar that can keep your IAT's down to 122F at WOT. The present IC doesnt seem to be able to quite achieve this as I think was indicated by indicated by Boost Monkeys Ice tank tests, but assuming the rcompart + Waldig super cooler can.....you can note the difference in the last 2 sets of numbers. Same psi output from the MAP but very different rwhp numbers....

SC Pulley.... Final MAP.... Fuel input per injector..... lb/hr/injector..... Inlet Volume..... cooling..... cooling..... .....IAT C..... IAT F .....rwhp..... density
74mm..........14.5psi............ 447cc..161lphr........... 42.6................. 607cfm............-11.7kW/hr. -40kBTU/hr....50......... 122....... 290...... 2.15kg/m3
74................15.1............... 456.....164................. 43.4 .................619.................-12.7.......... -43..............50...........122 .......296...... 2.20
62................18.1............... 481.....173................. 45.8 .................654.................-11.9...........-41..............64.......... 147 .......305...... 2.32
62................18.0............... 500.....180................. 47.6..................680.................-17.7.......... -60..............50.......... 122 .......315...... 2.41

It would be good to log (and compare) density numbers rather than psi. That's the clincher!
I dont have a dashdaq or similar, but if you can pull in the MAP and the IAT it can be calculated.
Great, thanks for your reply. Just wondering:

- How did you get those numbers? OBD2?
- How do you measure the fuel input per injector?
- How do you measure the inlet volume? Is this value measured from the outlet of the SC?

What is the max CFM that the SC can blow?

/Adam
 
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