(SOLVED -ish?) HELP! Lug nut thread pattern shenanigans

[PlayingWithTBI]

Is there a jumper or switch on the tach for 4, 6 or 8 cylinders?

 

[SasquatchOnDeck]

I'm in hell.
I ordered 5/8 lug nuts. the ad didn't specify pitch, and ill admit i was in a hurry. So today i learned there are coarse (5/8x11) and fine (5/8x18) commonly available... i bought coarse and need fine. More to come.
Also, yes, there is a button on the back, it was reading exactly 2x the actual RPM showing from a phototachometer on the flywheel, so im assuming it's set to 4 cylinder.
Ordered fine thread lug nuts. this will be attempt number 5 LOL

 

[kennythewelder]

I'm in hell.
I ordered 5/8 lug nuts. the ad didn't specify pitch, and ill admit i was in a hurry. So today i learned there are coarse (5/8x11) and fine (5/8x18) commonly available... i bought coarse and need fine. More to come.
Also, yes, there is a button on the back, it was reading exactly 2x the actual RPM showing from a phototachometer on the flywheel, so im assuming it's set to 4 cylinder.
Ordered fine thread lug nuts. this will be attempt number 5 LOL

The lug bolts are metric, not 5/8 course or fine. They are M14-150.

 

[454cid]

The lug bolts are metric, not 5/8 course or fine. They are M14-150.

Kenny, go back and read the thread... he's got a wierdo Dana Ford axle somehow.

 

[kennythewelder]

Kenny, go back and read the thread... he's got a wierdo Dana Ford axle somehow.

Thanks, my bad. I look at so many threads, I sometimes miss some of the details.

 

[SasquatchOnDeck]

Thanks, my bad. I look at so many threads, I sometimes miss some of the details.

All good, it's got everybody pretty confused. But, we've finally got a winner! 5/8x18

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[Frank Enstein]

I think longer studs are in order! That's scary!

 

[someotherguy]

I think longer studs are in order! That's scary!

Those wheels use "shank style" or "mag lugs" where the lug hole in the wheel is larger than normal and there is a shank on the lug that goes in through the wheel, instead of the normal conical seat type lugs. At least that's what they -should- be but we can't see because the bolt-on style center cap is obscuring our view.

Richard

 

[Schurkey]

Wouldn't "shank style" lug nuts have a bigass washer on them?

The old "unilug" nuts had an oval washer covering an oval bolt hole, you'd buy either the centered-hole washers, or the offset-hole washers depending on the bolt circle diameter of your hub. the hole in the offset washer could be offset to the inside or the outside. One wheel would fit 4.5", 4.75, or 5" bolt circles depending on whether the offset hole was to the inside or the outside, or a centered washer was used. (I hated Unilug wheels, the washers were always bent from over-torquing, which meant the bolt hole in the wheel was also distorted. Unilug wheels were always a friggin' nightmare to get installed properly.)

Wheels with round bolt holes typically got round washers with centered holes.

Photo of shank-style nuts with offset round washers:

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[someotherguy]

Nobody said what we're seeing in the picture is the whole story, or that it is assembled correctly.

(And yes, unilug wheels sucked, and shank/mag style lugs usually require a washer.)

Richard