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Search found 1984 matches

by modok
Thu Dec 05, 2019 11:08 pm
Forum: Engine Tech
Topic: Nitrided cams
Replies: 11
Views: 236

Re: Nitrided cams

It would be nice if the cams were straightened and shipped in a large crate so they could not be damaged., would be nice. On the other hand, It's SO easy to straighten them, just fix it. Personally i don't think nitiriding is "the" solution....but if it's done correctly and works well with whatever ...
by modok
Thu Dec 05, 2019 8:58 pm
Forum: Engine Tech
Topic: Rod strength
Replies: 35
Views: 1032

Re: Rod strength

Yeah, probably
by modok
Thu Dec 05, 2019 8:51 pm
Forum: Engine Tech
Topic: Rod strength
Replies: 35
Views: 1032

Re: Rod strength

A single 1/4-28 bolt can hold 1500 pounds tension, and it has lots of score marks since it's threaded. The figure of 1500lb is is wrong. It would have to be several times that to even be believable. just as a very rough guess, this powered metal is at least 80% as strong in tension as mild steel, an...
by modok
Thu Dec 05, 2019 8:45 pm
Forum: Engine Tech
Topic: Valvoline VR1 for flat tappet cam break in?
Replies: 3
Views: 221

Re: Valvoline VR1 for flat tappet cam break in?

Yes it makes a good break-in oil for that. it is not necessary to add anything to it.
by modok
Mon Dec 02, 2019 11:11 pm
Forum: Engine Tech
Topic: Rod strength
Replies: 35
Views: 1032

Re: Rod strength

people just find it very strange. I did too when I first encountered the stuff, but that was 25 years ago. Once you get used to it.....it's pretty cool stuff. $ for $ better than forged mild steel, and.....Whenever joe blow is talking about rods, it's always the subject anyway. About how he can get ...
by modok
Mon Dec 02, 2019 10:34 pm
Forum: Engine Tech
Topic: Wrist pin diameter and rpms
Replies: 21
Views: 672

Re: Wrist pin diameter and rpms

ok, we'll call that a chamfer.
Very nice
by modok
Mon Dec 02, 2019 10:26 pm
Forum: Engine Tech
Topic: Question about piston ring sizes
Replies: 2
Views: 159

Re: Question about piston ring sizes

Ring size is the size of the bore the rings are intended for. If the bore is .001 bigger than the intended bore size, gaps will be .003 larger, usually not a problem. Piston should be smaller than the hole, unless it's a Subaru. :P So, I don't know why the pistons would be the same size as the rings...
by modok
Mon Dec 02, 2019 3:17 am
Forum: Engine Tech
Topic: Wrist pin diameter and rpms
Replies: 21
Views: 672

Re: Wrist pin diameter and rpms

nice. And one more thing to consider, regarding..."surface speed" the pin spins. tho, we don't really know how much, but, it picks up SOME spin at tdc and it may continue spinning of it's own momentum, so, the moment of "zero spin" may not actually happen at all. Sometimes I've wondered if floating ...
by modok
Sun Dec 01, 2019 6:13 pm
Forum: Engine Tech
Topic: when are 3/4 grooved main bearings needed for bbc ?
Replies: 223
Views: 5039

Re: when are 3/4 grooved main bearings needed for bbc ?

MOSTY older engines the oil went to the main gallery first and lifters second..... because the oil was metered to the lifters/ valve train via a timed slot in the cam. This was used instead of a simple restriction, because less likely to clog. Many you can see how that was, but others like the ponti...
by modok
Sun Dec 01, 2019 6:07 pm
Forum: Engine Tech
Topic: Are these con rods worth saving?
Replies: 13
Views: 879

Re: Are these con rods worth saving?

yeah, well, if youi want to talk what makes "economic sense" the whole thing doesn't. The way you get 30$ con rods is usingt chinese steel and produce it in a country where labor is cheap. Now, if that's what you LIKe, that's fine. But, if you sent your old rods to a place where labor is cheap then ...
by modok
Sun Dec 01, 2019 2:45 am
Forum: Engine Tech
Topic: when are 3/4 grooved main bearings needed for bbc ?
Replies: 223
Views: 5039

Re: when are 3/4 grooved main bearings needed for bbc ?

Oh, ok, third oil galley.
Maybe
by modok
Sun Dec 01, 2019 1:10 am
Forum: Engine Tech
Topic: when are 3/4 grooved main bearings needed for bbc ?
Replies: 223
Views: 5039

Re: when are 3/4 grooved main bearings needed for bbc ?

I don't know either, don't have both in the shop right now. perhaps you could remind me.
by modok
Sat Nov 30, 2019 6:49 pm
Forum: Engine Tech
Topic: Weld or putty
Replies: 12
Views: 598

Re: Weld or putty

May be able to put a threaded taper pin in it.
lock&stitch makes aluminum pins.
by modok
Sat Nov 30, 2019 5:28 pm
Forum: Engine Tech
Topic: Single 44 idf weber on chevy inline six
Replies: 36
Views: 706

Re: Single 44 idf weber on chevy inline six

What direction the throttles open can have a drastic impact on fuel distribution and wet flow. I would guess having the LOW hanging end of the throttles toward the outside would be preferable for distribution, but worse for wet flow. At least.....build it so you can try both ways. The 38/38 the thro...
by modok
Sat Nov 30, 2019 5:20 pm
Forum: Engine Tech
Topic: when are 3/4 grooved main bearings needed for bbc ?
Replies: 223
Views: 5039

Re: when are 3/4 grooved main bearings needed for bbc ?

If you have one of these fords, I'd recommend you cut a groove in the block.... and the use TWO oil holes in the bearing. Just like a chevy.....ls3 Is that ironic or what :P Is it a timing issue? or a flow issue? We can say it's both. Tho personally I think it's MORE a flow issue. Aspect ratio of th...