![]() 09/21/2017 at 20:00 • Filed to: 2wheelsgood, honda | ![]() | ![]() |
Just make oval pistons, then it’s technically a V4, even if it has two spark plugs, two sets of 4 valves, and 2 connecting rods per cylinder.
That’s the approach Honda used on the NR500 racer, to try to get a 4-stroke to be competitive with 2-strokes:
It, however, wasn’t very successful.
A later 750 cc version was then designed for endurance racing, and then made it to the road as the NR, with 300 sold - that parts diagram at the top? That’s from the production engine .
![]() 09/21/2017 at 20:11 |
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Sounds like something Saab would do. They had two-strokes, they had V4's, but never together. (And had they not been literally forced by some of their engineers to use Ford’s V4 then they probably would have found a way to upsize two-stroke engines anyway)
![]() 09/21/2017 at 20:35 |
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I can only imagine how awful it would be to get oval piston rings to fit.
![]() 09/21/2017 at 20:40 |
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Oh shit. I’m old enough to remember when Honda introduced the oval pistons which were almost immediately banned as I remember it. Never really got why the shape mattered. Didn’t know it had separate plugs and whatnot. I was pretty young at the time. I’d forgotten all about it until now. Thanks!
![]() 09/21/2017 at 20:43 |
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I remember these and they were so cool.
![]() 09/21/2017 at 21:04 |
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Sounds like something Ariel would do. Oh wait. They already did
![]() 09/22/2017 at 05:55 |
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But then, they did the Monster.
And with the same basic engine, the Auto Union V6:
![]() 09/22/2017 at 09:39 |
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318? Naw bro, 2.5!
389? Naw, 195.
![]() 09/23/2017 at 03:00 |
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*Never made it to production :(