Don Terrill’s Speed-Talk

Also one thing that throws off the comparison between a motorcycle and v8, is just the sheer scale. The amount of wall area inside the manifold compared to what it flows just isn't comparable from small to large. A briggs and stratton maybe should have a 20" long intake and a 40" exhaust, but it jus...

280 silicon carbide

-Where- the throttles are located...makes zero difference, when the throttles are fully open. So of course it makes no difference to WOT power either way.

well, I guess.
a lot of us like OLD technology, otherwise we would not be here.

I don't know what it is, I really don't!

GLHS60 wrote: ↑

Tue Feb 18, 2020 11:19 pm

Attached is another experiment that worked out great, can you figure it out??

A high powered motorcycle needs to be tractable at lower rpms

As an experiment I ran an old 1970's Ford V8 on hypoid oil for a couple of months. It's viscosity seemed lower than 80/90, about #30 on the Ford "main bearing rumble" index. The old Engine ran fine but the exhaust had a differential like odor. I appreciate you sharing that. Some people are afraid t...

Any oil on the shelf at a store for idiots will meet certain quality standards to make is suitable for use in cars 5-10 years old. So, the IDEA is, you can't go wrong. But Is it suitable for use in a motorcycle, in a VINTAGE motorcycle? WHO KNOWS. It's your motorcycle, you tell us what kind of oil i...

There was a period of time they sold the worst batteries, somehow, even tho..... as everybody says, they were made by the same company that supplies everybody else. battery execs were probably not interested in a LONG term relationship and probably were laughing at how long that went on, before anyb...

Just run the good oil 20% longer between changes, same price, probably better in every possible way.
Get out of wally world. It's not a place for thinking deep thoughts.

Valve seat material you want to use has to do with the fuel used, what the valve is made of, how hot the valve gets, and how hot the head gets, and what kind of ah.... atmosphere it lives in....(how lean it runs or if it's a diesel, egt, ect). it doesn't have anything to do with being imported, tho ...

Ductile iron is not necessarily any more wear resistant than cast iron, just well....more ductile. Should be nice to work with but not highly durable. if they will hold up good enough or not, It very much depends on the application. Sintered seats are made of metal powder kind of "Forged" into a sol...

it already has only half the counterweights.
Personally I would leave it alone. You can get a LOT more difference from a light flywheel. 1 gram of material at the edge of the flywheel probably is the same as about four at the counterweight, or more.

Why is the question about clearance?
Thread should be titled, "bearing loose in hole"

Same here. Home garage I have a good collection of seat grinding stuff, air driver, 8 holders, three dressers.
But there is also a need to cut seat pockets, and cut fresh new seats to shape.......