Quote:
Originally Posted by Mr. Wyndham
In theory, the cooling effect of DI should make for better FI applications...
But unfortunately, it sounds like it'll be next to impossible to properly tune the engine...like the current V6s. The engineers spoke to that directly in an interview...:(
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With our supercharger systems, we are having good luck at up to around 7 psi. IPF superchargers seem to run well there but do not offer boost higher than that.
Owners of the RX supercharger kit have tried to go higher with bad results.
I'm not the best at explainin so here is a quote from a tuner:
"You're exceeding the limits of the fuel system and it’s causing injection window misfire (which causes poor combustion). It’s trying to inject too much fuel. It’s a DI motor which means it has to inject the fuel between the time the intake valve closes and the time it’s ready to ignite the mixture. At 5000 RPM the fuel demand is such that it’s still trying to inject fuel when it’s trying to ignite the spark plug. It’s like peeing on a fire, it doesn’t work so well. It causes misfiring, which causes excess oxygen to come out the tailpipe, leading to a leaner-than-actual reading."
The IPF kit on the LFX V6 is capable of over 400rwhp. I guess with similar boost on the new LT1 you'd be in the range of 550 or 600rwhp or more.....who knows lol.
With tuning on the LFX looking to be more accessible to a wider range of tuners than the LLT V6 in the 2010s and 2011s, we have guys with twin turbo setups that should be able to get well past 400rwhp but at this point running big boost is impossible. Hopefully that will change.