A&Q about 350Z
Q:
I can't lecture the whole univesity course on engines in one thread. And I don't want to. People are paying serious money to get this information. All that I can recommend - read the books on the subject, or save some money and go get some formal education...
A:
Now that is a cheap copout if I ever heard one!! FYI I do have a formal education, and I am not asking for a freeking lecture here you keep saying that my idea would not work at all, with no scientific explanation, not even a good hint as to what you are talking about. I have read several technical books and hundreds if not thousands of technical discousions here and on other automotive sites, I may not be an engineer, but I know more than your avrage mechaninc about the interanl combustion engine, so to keep you from having to do a lecture to enlighten me, just anwser me one question why would a 15L engine burn more fuel at highway speeds than a 2L engine, lets just say the 2L needs to run 3600RPM to maintain 70mph, evan assuming that we will not make any better torque to displacement ratio, the 15L engine (in the same car) could run highway speeds at just under 480 RPM, the low RPM keeps the load up for higher effecency, so now we have one engine moving over seven times faster than the other, it is a well established fact that higher speeds mean higher stress on components, much higher friction, and a more aggressive cam profile. Thus far this is all really well established stuff, so let me know where I am loosing you. I would guess that an engine with the lower speeds, and much lower friction would be more effecent, it makes sence to me lower surface to volume ratio, lower swept area to volume ratio, drasticly reduced speeds, lower g-forces on components (which should reduce pumping losses). OK we are still dealing with fact here if anyone ense wants to see the numbers I'll re post them. OK here is the gray area, the setup for an engine like this, cam profile, and intake runers; it is really hard to setup a cam and manifold to make effecent torque at bellow 500 RPM and produce cutting edge proformance with higher RPMs (4000-5000) No engine that I have ever seen had a powerband even close to that it, it would need some serous next level VVTi to attempt this, otherwise the engine would have to be set up for either low end effecency or top end power. Direct injection is a must!!! No bore like that with port injection could ever hope to pass emmissions. The tranny would have to be built for extreme torque, more than a modern turbo diesel. Anyone else have an engineering challenge this would have to overcome, and PLEASE don't just throw crap out here like a monkey with diarrhea, explane your point insted of just saying (It won't work) and if your explanation would take up too much of your time, go post something somewhere else we don't need half a$$ information confusing people.
A:
Ok, guys this has gone on long enough. This is just getting argumentative
Closed.