Thread: Project "Left Overs"

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Originally Posted by J. Robinson

I'm confused... 5280 x 60 x 12 / pi =121,008.4...

Anyway, I missed the part that says "OD ratio". DUH!! If you take my calculated rpm of 3119 x the .64 overdrive it comes out to 1996. Our figures confirm each other then... Where they got the 336 still eludes me though.

Jim,
Not to beat a dead horse, but the string [(5280ft/mi x 1hr/60min x 12in/ft) divided by pi] has a numerator of 5280 divided by 60 times 12 which equals 1056, which divided by pi equals 336.13. In the original formula

RPM = (mph x Differential Gear Ratio x 336 x OD Ratio)/Tire Diameter in Inches

you're entering MPH so the values in the 336 factor get you to a numerator of revolutions and speed in inches per minute with pi being dimensionless. Then when you divide by the denominator tire diameter in inches you're left with RPM.

Originally Posted by rspears

Jim,
Not to beat a dead horse, but the string [(5280ft/mi x 1hr/60min x 12in/ft) divided by pi] has a numerator of 5280 divided by 60 times 12 which equals 1056, which divided by pi equals 336.13. In the original formula you're entering MPH so the values in the 336 factor get you to a numerator of revolutions and speed in inches per minute with pi being dimensionless. Then when you divide by the denominator tire diameter in inches you're left with RPM.

Thanks, Roger. I was using 60 as a multiplier instead of as a divisor. DUH!! Even at my age I can still learn things occasionally and as long as somebody is learning, we're not beating a dead horse (That's the school teacher coming out in me...).

Don, sorry we hijacked the thread for a few postings, but some old fart (me) had to have help seeing through "the haze".

Today was like Xmas, UPS brought me a Speedway box. I got the new wishbones and Ford tie rod ends for them. They are really really nice, and so close to the originals you would be hard pressed to tell the difference......except these have no pitting and all that normal stuff.

Once I laid them up against the car I decided to run the front end suicide, so I called Speedway back and ordered the proper perches that screw into these. I also ordered my tires from Coker. I am going to run my usual 5:60 x 15 whitewalls on the front (just like my 27 has) but on the back I am going to run the 8 inch wide Firestone slicks, also whitewalls. I had the same tires on the back of the 23, except 10 inches wide, and after 3 years and lots of miles they still looked good and had lots of tread depth left.

Finally, I took the back two rims to the powdercoater to have them done in black. I already had them do these same two rims in red a while back, but when I got the black ones from Coker for the front they just looked better to me. Not sure yet if I am going to run the Olds hubcaps I have or not. Once the tires and rims are on the car I can figure that one out.

Here is how the new Speedway wishbones look. So glad I bought them.

Don

Geez, I miss a couple of weeks and you just about build a whole new car!!
It really is looking good! I was wondering about the quality of speedways bars, good to here they are nice.
Ken

See what you get for leaving without telling us where you are going! I thought you've been a little quiet lately.

I'm pretty impressed with the quality of these wishbones, Ken. If someone was building a high dollar car these couild be chromed very easily, hardly any prep work compared to using original ones.

BTW, you may have also missed that I sold my 46 Tudor to Don. He was looking for a new project and I was looking for some room in my part of the shop, so we made a deal. He's started moving ahead on it already, he ordered one of the TCI parallel rear spring setups for it. I hope he does a build thread on it when he starts.

How about your projects?

Don

There was someone doing stainless wishbones, can't remember who it is now, they were quite spendy though !!!

Originally Posted by Itoldyouso

See what you get for leaving without telling us where you are going! I thought you've been a little quiet lately.

I'm pretty impressed with the quality of these wishbones, Ken. If someone was building a high dollar car these couild be chromed very easily, hardly any prep work compared to using original ones.

BTW, you may have also missed that I sold my 46 Tudor to Don. He was looking for a new project and I was looking for some room in my part of the shop, so we made a deal. He's started moving ahead on it already, he ordered one of the TCI parallel rear spring setups for it. I hope he does a build thread on it when he starts.

How about your projects?

Don

I remember seeing those. They were nice, but like you said, about $ 700 a pair, I think. At $ 300 a pair these were more my speed. Usually, when people reproduce something they always get something wrong, just enough to make them not quite the same as the originals. Not the case with these, whoever Speedway is buying them from did a great job of cloning IMO.

Don

Originally Posted by roadster32

There was someone doing stainless wishbones, can't remember who it is now, they were quite spendy though !!!

I don't know if it's the same hardware you saw, but there was a guy in Vegas who was making some a few years ago. He would display them at the LAR swap/show for a couple years. Very well made and looked terrific. But too many people had the same reaction to the price you did. They could still be had, but you'd have to "motivate" him.