Quote:
Originally Posted by WiggyB
Correct me if I'm wrong but my understanding that port allows fuel in the chamber for a longer cycle than direct injection. In returns allows you to rev the engine slightly higher. So with that addition you could stretch it out a little further.
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Either you have the fuel to support the airflow at the given engine load…or you don’t. You can accomplish the same thing with correctly sized DI fueling. Yes, port can spray over a longer injection window…but that doesn’t mean higher mechanical engine RPM capability. I can rev higher than you even though I’m DI only…because my valve train is setup for it (and have the fueling to support it…barely lol).
You shouldn’t push the RPM much higher until you upgrade the valve train. And even then, you’ll want to data log where you shift, where you end up after the shift, and residence time in each RPM range. Then you can maximize your acceleration by fine tuning your shift points.
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)