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Thanks for the help!

I need the definition of flare angles of so-called 37 degree AN fittings. I believe that the male/female angles are not identical, but can't find the actual angles.

For about 12 seasons I used steel sleeves in the aluminum V8 block of my blown alcohol minipuller (370 c.i., 900 HP). Machined from seamless DOM tubing, but I don't recall the alloy. There wasn't anything unusual about the ring sets- I merely told the ring manufacturer about the steel sleeves.

Thanks. I apologize for not reading the whole thread.

If the ring retains "Belleville" functionality, is there no concern for leakage during the intake stroke? Or would this be considered a "benefit"- built in positive crankcase ventilation...

A number of times I changed press-fit liners in the aluminum block of my blown hemi tractor-pull engine (M/T Pontiac hemi heads), no problem (~.004" interference at room temperature). Sleeves are machined from DOM steel tubing, retained by flanges sitting in deck counterbores. Flanges are...

Didn't I read that Detroit is at least to the prototype stage with no-starter-motor vehicles? And, yes, Model-T Fords of the brass era would often start without cranking. A late friend demonstrated to me his T starting 17 times before it failed.

Thanks chez. That's interesting about LNS of chains.

If automotive journalism can be believed, 100 hour full-power engine tests date back awhile. Supposedly- Bunkie Knudsen insisted on changing to forged crankshafts in the 1958 Pontiac V8 engines after cracks occurred in cast cranks during such tests.

guru- you are right, no end thrust on idler. I apologize.

Wrong. Idler gear will have twice the end thrust of the crank gear or cam gear.

I'm not getting needed answers nor have I found a gear company offering the LNS grinding, so I'll simply duplicate the gearset with helical gears- and somehow deal with end-thrust of the idler gear. Thanks for listening.

Mike- No interest in patents or commercial value. Merely entertainment for my retirement years. Rather than put up with the gear whine, I put a normal timing drive in the engine and it's serving me well. But I'd really like to someday use the variable-cam-phasing on the street. While testing it...

I asked about hydraulic gear pair loading because it could be done very compactly in my application, and space is very limited. I would substitute a gear pair for the idler gear of my cam drive which is only 1.970" OD, with no available space around it. Engine oil pressure would be routed...

I suppose you could say that my question about durability of LNS has already been answered by Opel's apparent satisfaction with it. I'll see if I can talk with Reishauer about it. Does the scissor-gear concept always imply spring loading of the paired gears to each other? Would hydraulic...

Mike- that's also my W.A.G. But I'm wondering if it would be durable enough for thousands of miles of street-driven use in an engine's camshaft gear drive?

Thanks for the comments. Wikipedia tells that Opel's "Whisper Diesel" engine uses both scissor gears and LNS (Low Noise Shifting) to quiet its cam drive. LNS appears to be a proprietary tooth grinding process by Reishauer which "prevents the generation of tonal excitations". I need to look into...

I just read that Honda used "gear pairs" for the primary drive in their 1968 CL350 motorcycle to have the efficiency of straight-cut gears without the usual noise. I need a primer on "gear pair" principles and design details.

The question was specifically about supercharged engines- and I assume mechanically-driven superchargers, since that's where the hunting-idle most frequently occurs. I've been around blower engines a lot- competed for almost twenty years with a blown-methanol engine in mini-rod pulling. There...

Torque measurement system completed, calibrated, and tested. All is well- cell wasn't damaged by overload. Thanks.