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Originally Posted by SkylineUSA
rev210,
Rule of thumb, from what I have learned over the years, 1cc = 1hp when it comes to injectors. So, that means the 550 should be good for 550hp.
I know the GT-SS if they are set up right can put out 550hp, and that is with the stock displacement, now you add the extra displacement, the engine is going to need that fuel from some where. If I am way off base, please let me know, but by my calculations, I would go for at least 600s, or better yet 720s.
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Hi,
What fuel pressure is the 1cc = 1hp formula applied to? With a higher than factory base pressure and more aggresive rate on an aftermarket reg like the HKS rising rate you can get quite alot more fuel supply. Fuel supply vs horsepower is the only equation worth concern, 1cc = 1hp is a very blunt instrument ,discard it if it doesn't have a fuel pressure condition (remember that the factory skyline has a rising rate reg so the fuel pressure condition would therefore be mapped and since we can't rely on all factory regs giving the exact same rise in the pressure curve why bother?).
I hope this helps put to death a rather dangerous myth.
Cheers
Dave