Hyperod's

Rob Voska · Post by **Rob Voska** » Fri Apr 09, 2010 1:25 pm

Aircraft Spruce? They have a wide range of bolts for old aircraft.

Bill Johnson · Post by **Bill Johnson** » Sat Apr 10, 2010 11:57 am

Aircraft spruce nor Granger.. MSC.. McMaster Carr carry the 12-36 thread rod bolts. Anyone have an extra set laying around their shop?

Michael Burke · Post by **Michael Burke** » Sat Apr 10, 2010 4:12 pm

You might be able to get them at ARP. They make very high quality hardware for racing applications. They're located in Santa Paula, Ca. If its isn't in the catalog, call them. I've been told by friends that they occasionally have items not shown.

Bill Johnson · Post by **Bill Johnson** » Sat Apr 10, 2010 6:06 pm

ARP doesnt have the 12-36 bolts but will make two of them for $900.00 Mostly Engineering setup costs.

Could the rod be sucessfully re-threaded to 12-32 thread??????

ted johnson · Post by **ted johnson** » Sat Apr 10, 2010 6:55 pm

You cannot rethread to 12-32. It would certaimly remove a good portion of the existing threads. I looked at the 12-36's in Machinery's Handbook. It's a UNS thread, and I couldn't find them at any of Sandia's suppliers. I think you're stuck with finding old Hyprode bolts. Ted

Mike Berg · Post by **Mike Berg** » Sun Apr 18, 2010 4:31 pm

Hello Bob,

I have never done this so I admit it is not easy, but you might have a tool maker friend who could make it easy.

cut a blank from say 4140 ph
ruf machine ID undersize by .020" and OD .001" oversize on the OD with great finish
split the bushing similar to original in photos supplied by online posting advice you may have to make two ruf bushings to end up with two mating parts
assemble the mating parts in a bore same as rod
remachine the ID .005" undersize polish or finish all mating surfaces B4 final cut
Heat treat Rc 60
reassemble and hone/polish to size
you may want to hone a few tenths out of the original aluminium rod hence the .001" over for OD

A tool maker will probably see the errors in this plan but they are the right people for a job like this.

Mike Berg

mcbob · Post by **mcbob** » Sun Apr 18, 2010 7:42 pm

Thanks Mike and the rest of the guy's who have more than provided a great set of answers
looks as if will be a display item for the near future at least unless i win lotto.

McBob.

Chris Hamm · Post by **Chris Hamm** » Fri Oct 14, 2011 3:07 am

The Hyprode "Hot Rod" sold for $17.50 (!!!!) in the early 60's and was a very, very strong rod.

Never had a single problem with one, though I did rip a wrist pin out of an over-lightened piston and blew that rod and very fast Hyprode 8-ported Mc9 engine.

Lubed wrist pin should be put in freezer for 15-20 minutes before pressing back into rod and be very careful when turning-in rod bolts! Hyprode torque wrench for tightening bolts is essential to the process. Don't and you risk breaking bolts or blowing rod.

Bill Johnson · Post by **Bill Johnson** » Fri Oct 14, 2011 4:23 pm

I have 4 of these rods for sale. One Cantalever style and the other three standard style. You can see pics of the styles by clicking on my previous post on page 2 of this thread.

mcbob · Post by **mcbob** » Fri Oct 14, 2011 6:29 pm

Well if there still $17-50 ea i'll take the 4 Bill .... oh does that include free worldwide postage ???

McBob.

Hyperod's

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