Elroy wrote: ↑Thu Sep 08, 2022 11:14 am
ClassAct wrote: ↑Thu Sep 08, 2022 10:04 am
MBE and others hav been doing it for quite a while. I’ve said for a looooooooooooooooong time that a soft(er) chamber is better NA in most cases.
Why do you think that is? Are there softened, quenchless chambers at the top tiers of NA motorsports?, like Nascar, Prostock, Comp Eliminator etc. ?
It seems like the evolution of things all and all have ended up at the opposite. But I of course haven't seen it all
I’m a nobody to dismiss MPE but NASCAR and designs with OEM level of involvement, which include a lot of R&D, measuring cylinder presssures, etc all do not use a softened approach.
F5838C11-71E5-4FCB-BAF6-3A2FEE26DE26.png
https://youtu.be/rBZCnG1HwDM (starting at 39:00)
The only thing I can think of, is that drag racers are not chasing efficiency at all so with the excess fuel they run in the engines, it may need a “softer” approach, where NASCAR, IMSA, etc applications, etc are not only worried about power, but part throttle efficiency and fuel mileage. The OEM race programs and NASCAR teams have gotten there based on widespread use of in cylinder pressure testing equipment.
Looking at a NASCAR chamber in the last ten years, they’re compact, with a lot of squish, and near flat top pistons.
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