Your racing series only allows a 4-cylinder, but you want a V8?

Kinja'd!!! "bhtooefr" (bhtooefr)
09/21/2017 at 20:00 • Filed to: 2wheelsgood, honda

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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:

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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 .


DISCUSSION (8)


Kinja'd!!! Amoore100 > bhtooefr
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)


Kinja'd!!! BaconSandwich is tasty. > bhtooefr
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.


Kinja'd!!! Flynorcal: pilot, offshore sailor, car racer and panty thief > bhtooefr
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!


Kinja'd!!! Highlander-Datsuns are Forever > bhtooefr
09/21/2017 at 20:43

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I remember these and they were so cool.


Kinja'd!!! Mini Guy- Now has a 4Runner > bhtooefr
09/21/2017 at 21:04

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Sounds like something Ariel would do. Oh wait. They already did


Kinja'd!!! Cé hé sin > Amoore100
09/22/2017 at 05:55

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But then, they did the Monster.

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And with the same basic engine, the Auto Union V6:

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Kinja'd!!! Demon-Xanth knows how to operate a street. > bhtooefr
09/22/2017 at 09:39

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318? Naw bro, 2.5!

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389? Naw, 195.

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Kinja'd!!! Amoore100 > Cé hé sin
09/23/2017 at 03:00

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*Never made it to production :(