Old Sep 30, 2013 | 04:02 PM
  #18 (permalink)  
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Billy22Bob
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Default Re: Boost comparison - 65mm and 61.9mm pulleys

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....
The first is for STOCK OEM, the 2nd, 3rd and 4th sets are with the DCAI

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.

PS - if you want to boast to your mates 400bhp - the 4th set does 396bhp....;>)
You can also see why the stock 450cc injectors are lacking with the 62mm, but the fuel pump may almost do it - if I could find some specs on the stock pump.....
 

Last edited by Billy22Bob; Sep 30, 2013 at 04:13 PM.
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