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Message: [QUOTE="peixinho, post: 880211, member: 12240"] I know you are just using it as an example but you cannot run 3ms or even 4ms... your timing would be so far advanced that it would blow your motor. Most people tune to the max of 2.4ms , maybe 2.6ms, I have even seen 2.8ms. But 3ms would cause major cylinder pressures and possible blow the motor. I do know that 240cc of fuel with 75% nozzles is correct. That has been tested with a flow bench. That is for sure. Another way to think about it would be like this. 240cc - 135cc = 105cc (so it is 105cc bigger than stock) 105cc/135cc = 77% (so a 240cc injector is 77% bigger than stock) That is why 75% (77%) nozzles will flow 240cc of fuel at 2.4ms and 4000ICP That is just a rating. It is just to help with measurements. You do not shoot 1000 shots in one cylinder per revolution. You also do not fire 175cc or 190cc in one revolution. You fire that much fuel in 1000 revolutions. So you only inject 175/1000 in one injection cycle assuming 2.4ms and 4000icp. Whether you run 175/30, 175/75, 175/100, 175/150 you will only fire 175/1000 in one cylinder revolution at 2.4ms and 4000icp The problem lies in the fact that with 175/150 you will continue to dump the full 175/1000 per revolution even at a lower pulse width. You are actually limiting the potential of the injector by putting too big of a nozzle on the injector. [/QUOTE]

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