turbine

iTrader: (1)

there is a local bolt manufacture in my area. they can make any style of fastener in any size and thread pitch.
i was thinking of having some custome studs made up.
has anyone else gone this route?

Black91n/a

Why? There's commercially available stud kits, both stock sized and oversized.

turbine

iTrader: (1)

why? i want to eliminate the middle man!

Turblown

iTrader: (12)

Its going to be FAR more expensive to have one set made, if its going to be a decent product. The only way I can even offer them is by making them in bulk, same goes for Rohan...

Heat treatments, straightening etc is expensive...

turbine

iTrader: (1)

you make these? how much do they cost from you? what do you think about using studs vs doweling
they are about 450 from mazda trix and i can get my engine doweled for 600
but thew say i cant use them with the stock flywheel

Japan2LA

iTrader: (256)

Are you talking the oversized guru stud kit? The oversized kit requires the complete block to machined and re-threaded to use them. The machine work alone for a 2 rotor engine will be close to $750.00 and more for a 3 rotor. Add the cost of the Guru kit and you are talking about $1200.00.. about double what it cost to simply pin a 13b motor.. For you 13b guys I am not sure how worth it it is but for people like myself currently building a 20B it is needed on the longer 20b engine when you have plans of making HP above 500..

Mahjik

iTrader: (1)

They have 2 sizes. One which requires machining and one that doesn't.

jamespond24

iTrader: (13)

I had mine 13rew studded with the oversize ones. I only put 3 stud on the spark plug area. All the PR running 4 on their 7's 13B. If you have a drill press and know how you can do it yourself. I was quoted $600 from the machine shop and it cost around $250ish for the drill press at Harbor Freight. It's not as hard as people make it to be but hey I'm a rotaryhead on a budget

Japan2LA

iTrader: (256)

Yes there are many people only using 3, 4 or 5 studs.. And you can probally get away with using a standard drill press.. but when doing the entire motor..all 18 studs, that needs to be done on a CNC machine with each part secured into a fixture to insure each hole is correct. The benefit from the oversized studs is the increased clamping tension achieved when using all of them. Only using 3, 4 or 5 absolutely defeats the purpose of this modification.

My 20b is completely studded all 18..

Black91n/a

There's probably too much slop in a drill press to accurately drill the holes (besides, you should be drilling them under sized, then reaming anyway). You could do it on a manual mill with enough time and patience. For instance, you could make a fixture to locate the pieces by the stock dowel pins, then do one hole at a time on all the plates and housings while keeping the mill in the same place, then reset for a new hole and start over. This will take a lot more time from having to keep changing the plates and housings, but if you've got your own mill and the time to do it, why not right?