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Search found 2052 matches

by modok
Thu Feb 20, 2020 11:01 pm
Forum: Engine Tech
Topic: Ir intake manifolds and carbs
Replies: 20
Views: 518

Re: Ir intake manifolds and carbs

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...
by modok
Thu Feb 20, 2020 10:39 pm
Forum: Engine Tech
Topic: What grit for lifter home.
Replies: 4
Views: 168

Re: What grit for lifter home.

280 silicon carbide
by modok
Thu Feb 20, 2020 10:35 pm
Forum: Engine Tech
Topic: Ir intake manifolds and carbs
Replies: 20
Views: 518

Re: Ir intake manifolds and carbs

-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.
by modok
Wed Feb 19, 2020 11:21 pm
Forum: Engine Tech
Topic: Ir intake manifolds and carbs
Replies: 20
Views: 518

Re: Ir intake manifolds and carbs

well, I guess.
a lot of us like OLD technology, otherwise we would not be here.
by modok
Wed Feb 19, 2020 10:48 pm
Forum: Engine Tech
Topic: Tightwad at wallyworld
Replies: 58
Views: 1739

Re: Tightwad at wallyworld

I don't know what it is, I really don't! :shock:
GLHS60 wrote:
Tue Feb 18, 2020 11:19 pm
Attached is another experiment that worked out great, can you figure it out??
Image
by modok
Wed Feb 19, 2020 10:45 pm
Forum: Engine Tech
Topic: Ir intake manifolds and carbs
Replies: 20
Views: 518

Re: Ir intake manifolds and carbs

A high powered motorcycle needs to be tractable at lower rpms
by modok
Tue Feb 18, 2020 9:00 pm
Forum: Engine Tech
Topic: Tightwad at wallyworld
Replies: 58
Views: 1739

Re: Tightwad at wallyworld

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...
by modok
Tue Feb 18, 2020 8:47 pm
Forum: Engine Tech
Topic: Tightwad at wallyworld
Replies: 58
Views: 1739

Re: Tightwad at wallyworld

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...
by modok
Mon Feb 17, 2020 5:34 am
Forum: Engine Tech
Topic: Tightwad at wallyworld
Replies: 58
Views: 1739

Re: Tightwad at wallyworld

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...
by modok
Sun Feb 16, 2020 8:29 pm
Forum: Engine Tech
Topic: Tightwad at wallyworld
Replies: 58
Views: 1739

Re: Tightwad at wallyworld

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.
by modok
Sun Feb 16, 2020 5:32 pm
Forum: Engine Tech
Topic: powdered metal vs ductile iron seats
Replies: 3
Views: 242

Re: powdered metal vs ductile iron seats

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 ...
by modok
Sun Feb 16, 2020 4:57 pm
Forum: Engine Tech
Topic: powdered metal vs ductile iron seats
Replies: 3
Views: 242

Re: powdered metal vs ductile iron seats

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...
by modok
Fri Feb 14, 2020 7:53 pm
Forum: Engine Tech
Topic: Inline Four Racing Crankshaft Balance
Replies: 12
Views: 599

Re: Inline Four Racing Crankshaft Balance

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.
by modok
Fri Feb 14, 2020 12:12 am
Forum: Engine Tech
Topic: Main bearing clearance
Replies: 26
Views: 964

Re: Main bearing clearance

Why is the question about clearance?
Thread should be titled, "bearing loose in hole"
by modok
Wed Feb 12, 2020 3:46 am
Forum: Engine Tech
Topic: Mill cylinder head/seat work without pilot
Replies: 74
Views: 3485

Re: Mill cylinder head/seat work without pilot

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.......