Comments by "mpetersen6" (@mpetersen6) on "driving 4 answers" channel.

  1. Maybe we should go back to shaft driven OHC with spiral bevel gears. But that was more an aeroengine thing.
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  2. What about scintered and forged OEM rods?
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  3. And to add insult to injury there is the one where the drive belt for the oil pump is on the output end of the engine requiring removing the transmission. Ford iirc. The only oil pump driven dry belts that make sense are dry sump conversions of wet sump engines for racing. As to conventional ICE engines crank mounted internal gear or gerotor types are best IMO. Camshaft driven pumps via the distributor are fine for OHV engines under normal operating conditions
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  4. Remember SpaceX had tooling built to manufacture composite fuel tanks and other components got the Starship. And then went with stainless steel.
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  5. For the truly adventurous DIYer there options. Depending on bore spacing and welding skills one can take the head from one car and build a new head out of two heads off of 4 or 8 cylinder engines.
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  6. There have been factory development projects. Ford had a 4 valve head for the Windsor. Oldsmobile had 4 valve heads under development for their big block https://www.streetmusclemag.com/news/the-w43-oldsmobiles-dohc-455-v8-that-never-was/ The DOHC was a development of the 4 valve pushrod head. There have been aftermarket multi valve pushrod heads. Three and four valve. Perhaps the most well known is the Gurney Westlake three valve heads. Unfortunately bling won't find an image. The one below is for a Corvette motor https://www.corvetteactioncenter.com/specs/c6/corvette-ls7-engine/ls7-engine10.html One problem with 4 valve heads on a pushrod engine is pushrod clearance issues. Plus one pushrod opens two valves. Additionally the exhaust valves usually need a secondary pushrod between the idle rocker arm and the one that opens the valves.
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  7. Twenty five or so years ago there was a lot of research being done on composite engine parts including blocks, heads etc.
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  8. This explains why Ford gave up on them in the 30s
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  9. Wider tires do not always improve handling or braking. There are exceptions. Mostly having to do with weather. One individual l knew bought an MX-5/Miata. After a week or so he bought new wheels and tires. Wider than stock. Not sure how much. Said it was great until it rained. Now maybe it was the tires or the tread pattern. But in the wet the car was dangerous to drive.
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  10.  @nerd1000ify  The Lycoming was intended for large aircraft such as the B-36. About the only piston aircraft engine developed in the US during WWII that eventually went into production and saw service was the R-4360. Unless one counts Wrights R- 3350. And that was not Wrights finest product. Overall the best US designed a/c engine was the R-2800. Pratt& Whitney did their development work inhouse including prototyping. Curtiss-Wright farmed a lot of work out to contractors. Two engines P&W was developing that had a lot of promise were their H type 24 cylinder sleeve valve engines. They were canceled to allow P&W to concentrate trate development work on the 4360.
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  11. Which makes more power? Look at the bore to stroke ratios of F 1 engines. But is more usable in the real world?
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