Interest in Main Bearing studs

[tpepmeie]

Hi, all. I have designed & sourced main bearing studs for the 2-bolt motors. Trying to gauge interest in how many sets to order. I believe these could be sold for $300 or less per set.

Question: at that price, is anyone else interested in a set? Lead time is ~3 weeks. Material is an aerospace grade of EN26 steel. Tensile strength 180k-200k psi. Threads are rolled. They are not ARP.

Todd

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[Jagdpanzer]

Thanks for sharing Todd.
Any chance they can also do studs for those of the 4 bolt LT5 persuasion?

[A26B]

Todd,
I could be interested in the M12 studs.

[pantera1683]

Sorry for hijacking, but what about head studs?

[Scrrem]

I'd be intersted in a set Todd.
Rich

[tpepmeie]

Sorry for hijacking, but what about head studs?

I didn't get these quoted... just bought Randy's since he'd done all the work and they were available.

[tpepmeie]

Thanks for sharing Todd.
Any chance they can also do studs for those of the 4 bolt LT5 persuasion?

I'm sure they would, but I don't have a 4-bolt block to take the measurements. In my case, I needed 2-bolt studs and since they are doing the setup to make them, buying in quantities brings the price down.

[pantera1683]

I didn't get these quoted... just bought Randy's since he'd done all the work and they were available. I'm not aware of Randy's. How much are they?

[tpepmeie]

I'm not aware of Randy's. How much are they?

I think he's put them on Ebay now for $1450.

[tpepmeie]

Hi, all. I have designed & sourced main bearing studs for the 2-bolt motors. Trying to gauge interest in how many sets to order. I believe these could be sold for $300 or less per set.

Question: at that price, is anyone else interested in a set? Lead time is ~3 weeks. Material is an aerospace grade of EN26 steel. Tensile strength 180k-200k psi. Threads are rolled. They are not ARP.

Todd


Looking at a higher grade material, which would push the price for a set up another $50 or so. Still a remarkable price compared to ARP. I'm going to order 5 sets initially, keeping one for myself.

[tpepmeie]

Determined the final specs on the material. Aerospace grade steel, 5S99G. Tensile strength ~190,000 psi; yield strength ~180,000 psi. More than adequate for main studs.

I've got interest from two folks. Let me know if you might be interested in a set.

Todd

[tpepmeie]

Update- these are finished, and should arrive by the end of the week. Will post final price once I confirm the fitment. Includes washers and 12pt nuts.

[tpepmeie]

Pics added. They arrived today, and are perfect. Prices and more photos later.

[tpepmeie]

I have three extra sets on hand at the moment. $525 per set, includes 12-pt nuts and washers. I'll post up in the For Sale area also.

These fit perfect. Will not interfere with the windage tray.

http://i1036.photobucket.com/albums/a441/tpepmeie/IMG_0949.jpg (http://s1036.photobucket.com/user/tpepmeie/media/IMG_0949.jpg.html)

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[A26B]

They sure are Purdy!

[tpepmeie]

UPDATE--these are now all sold. Except for my sets. Thanks guys.

[tpepmeie]

I'm contemplating a second batch of these if there is enough interest. The first batch sold out very quickly. Let me know if anybody is interested. I'd probably do at least 5 sets to get the best cost.

[tpepmeie]

Just testing the water. I need 5 sets to make an order. Is anyone interested?

[cvette98pacecar]

Todd, What is the cost?

[Dynomite]

Interested in one set :thumbsup:

[FU]

Interested

[spork2367]

I would take two sets. I'm part way into a rebuild now.

[A26B]

Todd,
I have a customer that might use a set also. I have sent him the info & will let you know as soon as I hear back.

[tpepmeie]

OK, it looks like I have at least the five sets.

Frank
Dynomite
Spork (2)
Jerry, maybe

Anybody else? Price last time was $525/set. I'll confirm that this week.

[A26B]

Confirmed. I'm in.

[tpepmeie]

OK. Price and lead-times were confirmed yesterday. Slight increase from last year's lot. Now $550/set, includes studs, 12-pt nuts and hardened washers.

Payment up front is required. Paypal is ok. I'd like to place the order this week. The stated lead-time is 3 weeks.

PM me if you need my paypal info.

[Dynomite]

PM Sent.
Does this include shipping?

Cliff

[tpepmeie]

PM Sent.
Does this include shipping?

Cliff

yes, includes domestic shipping.

[tpepmeie]

Have payment for two sets. This is absolutely the last run of these I'm going to do. These are made with the finest steel, and imported from the UK. I will keep interest open until Tuesday 5pm, the order goes in on Tuesday night. Please contact me if you're interested.

Todd

[pantera1683]

Todd,

I may be interested, just not sure I need them. At what power level do these offer an advantage over the stock bolts?

[tpepmeie]

Todd,

I may be interested, just not sure I need them. At what power level do these offer an advantage over the stock bolts?

I have no quantitative data to support when these are necessary. I can say that upon teardown, my engine showed signs of the main caps "walking" with the OEM fasteners. That was a 4" stroke / 7000 rpm / 700+ crank horsepower.

The OEM fasteners are torque-to-yield, and the M12 bolt is NLA. These studs represent a convenient alternative to re-using the factory bolts.

[spork2367]

I have no quantitative data to support when these are necessary. I can say that upon teardown, my engine showed signs of the main caps "walking" with the OEM fasteners. That was a 4" stroke / 7000 rpm / 700+ crank horsepower.

The OEM fasteners are torque-to-yield, and the M12 bolt is NLA. These studs represent a convenient alternative to re-using the factory bolts.

I know that on the engine that I'm rebuilding now, at 112,000 miles on the factory build there were signs of slight walk/chatter.

[tpepmeie]

Thanks guys. This batch is now ordered. I'll let you know when they arrive.

[tpepmeie]

Update -- these are now finished. I will try to get them boxed and shipped this week.

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[Dynomite]

Nice....PM sent

[tpepmeie]

Everything shipped out to you today. The latest delivery is Friday this week.
Thanks.

Todd

[spork2367]

Thanks!

[Dynomite]

Received.....thanks....very nice....exactly what I needed :thumbsup:

[A26B]

Got 'em! Very nice.

[spork2367]

Got my two sets and they are beautiful!

[tpepmeie]

Most of you should have these by now. I realized I should provide some guidance for torque values. Using either oil or ARP ultra torque on the threads and washers, you should tighten to:

M10: 52 ft-lbs (in two steps)
M12: 80 ft-lbs (in three steps)

At those levels, you'll stretch the studs to approximately 75% of the yield strength. You'll want to put several (3-5) torque cycles on the fasteners to burnish the threads and stabilize the friction value.

Note: the fine threads on the nut end of the studs are not the same pitch as the OEM fasteners. You should not use the same torque-angle specification as the stock bolts. That will result in under torqued studs.

If you want to use torque-angle methods, contact me offline and I can provide the angles.

[Dynomite]

Using either oil or ARP ultra torque on the threads and washers, you should tighten to:

M10: 52 ft-lbs (in two steps)
M12: 80 ft-lbs (in three steps)

At those levels, you'll stretch the studs to approximately 75% of the yield strength. You'll want to put several (3-5) torque cycles on the fasteners to burnish the threads and stabilize the friction value.



What exactly is 3-5 torque cycles?

[tpepmeie]

What exactly is 3-5 torque cycles?

Tighten and release. For most builders, this happens anyway as you pre-assemble, hone, measure clearances, and re-assemble. The point is simply to burnish the threads so you get an accurate and consistent stretch using the torque method.

[Dynomite]

Tighten and release. For most builders, this happens anyway as you pre-assemble, hone, measure clearances, and re-assemble. The point is simply to burnish the threads so you get an accurate and consistent stretch using the torque method.

Tighten them several times...not torque them....which makes sense. Thank you :handshak:

[tpepmeie]

These are available once again-- I recently had another batch made.

17-4ph steel for these latest ones. Same price. $550/set.

2-bolt motors only for now....

[spork2367]

These are available once again-- I recently had another batch made.

17-4ph steel for these latest ones. Same price. $550/set.

2-bolt motors only for now....

Why the switch to 17-4?

[tpepmeie]

Exchange rate helped, so it all got a bit cheaper. So I just upgraded the material. No real operational benefit.


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[GOLDCYLON]

Are these available?