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Discussion Starter #1
I have just change my BL61 to a BL67 (A/R .68 both).
I don't really see the different with 20PSI, is it normal?
Moreover I'm richer I used to run in 11:1 and now I run in 10:1, is it normal too?
Could it be the Wheather? the fuel, it was 93 pump gas

I have to work and the map to have better result I think
 

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Makes sense to me - now that you have a larger Turbo, at the same 20 PSI levels your T61 was better in it's effiecency range - hence the richer fuel at the same PSI on the 67. I wonder if your putting down more or less HP?

I just went from a T71 to a SP63 and I'm actually running out of Fuel at 18 psi, where on the T71 I was not. The car feels stronger now then it did with the T71. But I'm sure everyone on the forums would say otherwise and say Bigger is Better.....but that's not always the case.
 
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