Speed-Talk is running on www.Speed-Talk.com

IMPORTANT: Update your bookmarks to https://www.speed-talk.com/forum/
(Right-click the URL and select "Bookmark this link")

Search found 2328 matches

by modok
Wed Sep 15, 2021 4:18 am
Forum: Engine Tech
Topic: Can a steel flywheel be machined?
Replies: 22
Views: 883

Re: Can a steel flywheel be machined?

Or possibly just because the step costs nothing when the flywheel is produced so they use it as some kind of adjustment to match the pressure plate and disk thickness. but speaking of that, if you want to overthink it... you might look into that aspect. You buy a pressure plate and disk from some co...
by modok
Wed Sep 15, 2021 2:55 am
Forum: Engine Tech
Topic: Can a steel flywheel be machined?
Replies: 22
Views: 883

Re: Can a steel flywheel be machined?

A flywheel grinder can make steps no problem. The location of the step is usually not tight tolerance, just needs to be somewhere between where the disk ends and the PP bolts on. it does FORCE you to center the flywheel on the rotating table. Sometimes i wonder why they even have a step. Sometimes i...
by modok
Sun Sep 12, 2021 6:00 pm
Forum: Engine Tech
Topic: Can a steel flywheel be machined?
Replies: 22
Views: 883

Re: Can a steel flywheel be machined?

A flywheel grinder is just a SMALL rotary surface grinder.
often with grinders the bigger it is..... the better it works,
so, big ones are more common for general purpose use.
But you CAN use a flywheel grinder for a lot more than flywheels. Put a magnetic table on it and make shims and whatnot.
by modok
Sun Sep 12, 2021 3:45 pm
Forum: Engine Tech
Topic: Can a steel flywheel be machined?
Replies: 22
Views: 883

Re: Can a steel flywheel be machined?

Anything can be screwed up with enough foolishness. A lightweight STEEL flywheel is not very rigid and prone to chatter especially if there are hard spots. Probably need to mount it to a big faceplate and use a number of jack screws to support it around the perimeter. Check the runout on the engine,...
by modok
Fri Sep 10, 2021 5:38 am
Forum: Engine Tech
Topic: The first exhaust collector in 4-2-1
Replies: 18
Views: 1324

Re: The first exhaust collector in 4-2-1

If the total length of the y is fixed, changing where the primaries end and the secondaries begin does not significantly change the frequency of the y branch. Tapering the secondary one way or another also does not change it either if the average diameter is the same. making the secondaries larger d...
by modok
Sun Sep 05, 2021 8:25 pm
Forum: Engine Tech
Topic: Lubricating the backs of bearings
Replies: 92
Views: 6255

Re: Lubricating the backs of bearings

yep, I agree. NGK make a great plug but they can get stuck just the same. love to let this go, but the similarities are glaring Some bearings are flash plated on the backs, and some aren't Long term I see no real difference in the engine. Plating the entire bearing improves shelf life. Same for spar...
by modok
Sun Sep 05, 2021 7:47 pm
Forum: Engine Tech
Topic: Lubricating the backs of bearings
Replies: 92
Views: 6255

Re: Lubricating the backs of bearings

Sorry I feel the need to channel the ghosts of my ancestors but they want to speak been through this before in many forms. How on earth does that harmonic damper bolt on the honda/acura take over 600ft-lbs to break loose? If they had put ONE drop of oil on the faces when it was built then it would n...
by modok
Sun Sep 05, 2021 7:23 pm
Forum: Engine Tech
Topic: Lubricating the backs of bearings
Replies: 92
Views: 6255

Re: Lubricating the backs of bearings

Yep I've wanted to investigate steering wheel gunk.
Some people they get this gunk build up on the wheel, and I drive and my hands get totally stuck on there, I have to rip them off once a minute, but I think THEY don't experience that or they would clean the gunk off. Strange chemistry.
by modok
Sun Sep 05, 2021 6:46 pm
Forum: Engine Tech
Topic: Lubricating the backs of bearings
Replies: 92
Views: 6255

Re: Lubricating the backs of bearings

I'll agree there. When you have to press fit things which could score from friction..... then the lube is usually better than none. The scoring reduces surface contact worse than the lube ever could very often. Scoring holds the surfaces apart, losing contact %, not good for heat transfer and streng...
by modok
Sun Sep 05, 2021 6:17 pm
Forum: Engine Tech
Topic: The first exhaust collector in 4-2-1
Replies: 18
Views: 1324

Re: The first exhaust collector in 4-2-1

I think that is all plausible and could prove to be true. It's not always true. The fact that you don't see such systems winning any races means it is "a road less traveled" but still possible, restricted class exhaust systems just ARE weird. I remember one case I investigated with simulation was ki...
by modok
Sun Sep 05, 2021 5:45 pm
Forum: Engine Tech
Topic: Lubricating the backs of bearings
Replies: 92
Views: 6255

Re: Lubricating the backs of bearings

I don't doubt it can work ok, but as for working better in any way that's another story. oil a morse taper is all I need to say. It works 100% of the time on people who are familiar with morse tapers. Some automotive machinists are not, and that's understandable........but oh well, once you get some...
by modok
Sat Sep 04, 2021 8:15 pm
Forum: Engine Tech
Topic: The first exhaust collector in 4-2-1
Replies: 18
Views: 1324

Re: The first exhaust collector in 4-2-1

Looks like you are headed for an important discovery of one form or another. I'm not going to try to steer you different. But far as your quesion..... IMo make a one cylinder model with straight pipe vs y pipes of different sizes all the same total length..... and compare the pressure trace graphs, ...
by modok
Sat Sep 04, 2021 5:06 pm
Forum: Engine Tech
Topic: The first exhaust collector in 4-2-1
Replies: 18
Views: 1324

Re: The first exhaust collector in 4-2-1

I think the fastest way to see the difference would be to look at the pressure traces of the different arrangements of Y Just one cylinder test would be enough to see what happens If your simulation cannot do this then perhaps you can get one that does, or maybe I do it, but I need to mow the lawn a...
by modok
Fri Sep 03, 2021 11:24 pm
Forum: Engine Tech
Topic: Counter-bore on iron valve guides
Replies: 4
Views: 684

Re: Counter-bore on iron valve guides

Sometimes called a carbon relief.
Nothing special about fords, it's used in many many engines. Usually just the exhaust, but sometimes the intakes too. not sure why it would be on an intake....., could be all the guides are the same, or maybe it has some benefit there, not totally sure.
by modok
Fri Sep 03, 2021 11:07 pm
Forum: Engine Tech
Topic: Lubricating the backs of bearings
Replies: 92
Views: 6255

Re: Lubricating the backs of bearings

You should see the surface finish on the main bores of this pinto I checked out a few days ago. :lol:
grooves like a record, and yet it worked