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Main bearings question
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Goldwolf  



Joined: 25 Jun 2017
Posts: 223
Location: Athens,GA

PostPosted: Thu Mar 21, 2019 12:49 am    Post subject: Main bearings question Reply with quote

Wanted to get some feedback.

My engine builder says I only need the standard bearings, of course we are all waiting on replacements. I did purchase a set of .25 oversize as a backup.

What are the future ramifications of using the oversize? Any degradation to the crank etc...?

I do not plan on doing any racing with the car.
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Paul  



Joined: 02 Nov 2002
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Location: Southeast Wisconsin

PostPosted: Fri Mar 22, 2019 4:49 am    Post subject: Reply with quote

No issue, these cars have strong cranks.
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safe  



Joined: 18 Mar 2017
Posts: 169
Location: Sweden

PostPosted: Fri Mar 22, 2019 5:54 pm    Post subject: Re: Main bearings question Reply with quote

Goldwolf wrote:
Wanted to get some feedback.

My engine builder says I only need the standard bearings, of course we are all waiting on replacements. I did purchase a set of .25 oversize as a backup.

What are the future ramifications of using the oversize? Any degradation to the crank etc...?

I do not plan on doing any racing with the car.


Quite unnecessary to machine a good crank to accept oversized mains....
Oversize bearings are usually a lot more expensive and with the cost of machining the crank a used good crank would be a better choice, usually.
Spend the money on balancing the crank, rods and pistons instead.
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Goldwolf  



Joined: 25 Jun 2017
Posts: 223
Location: Athens,GA

PostPosted: Sat Mar 23, 2019 12:27 am    Post subject: Reply with quote

The oversized mains were not much different in price. I'm going to call EBS and check the status of the new run.
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safe  



Joined: 18 Mar 2017
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Location: Sweden

PostPosted: Sat Mar 23, 2019 12:45 am    Post subject: Reply with quote

Goldwolf wrote:
The oversized mains were not much different in price. I'm going to call EBS and check the status of the new run.


How much are a standard set from EBS?
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Goldwolf  



Joined: 25 Jun 2017
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Location: Athens,GA

PostPosted: Sat Mar 23, 2019 2:48 am    Post subject: Reply with quote

I think $125
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Goldwolf  



Joined: 25 Jun 2017
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Location: Athens,GA

PostPosted: Tue Mar 26, 2019 7:57 am    Post subject: Reply with quote

I called EBS today. The OK'd the order and expect the bearings in about 2 months, maybe a litter sooner.

It's been a year for me, I might go ahead and do the oversize.
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Joined: 18 Mar 2017
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PostPosted: Tue Mar 26, 2019 8:06 am    Post subject: Reply with quote

They are 200 from Mittelmotor.de. That must be cheaper than grinding the crank.
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Goldwolf  



Joined: 25 Jun 2017
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PostPosted: Tue Mar 26, 2019 11:43 am    Post subject: Reply with quote

I might be tempted to buy them from mittlemotor. But for the life of me I cannot find crap on their site.

How does anyone find anything there?
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Goldwolf  



Joined: 25 Jun 2017
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Location: Athens,GA

PostPosted: Tue Mar 26, 2019 11:55 am    Post subject: Reply with quote

It is not possible to use their site to find it.

but here is the link

https://www.mittelmotor.de/cms/en/4-1-motor/4-12-kurbelwelle/14297/4-12013A-neu-detail
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Joined: 18 Mar 2017
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Location: Sweden

PostPosted: Tue Mar 26, 2019 3:47 pm    Post subject: Reply with quote

Goldwolf wrote:
I might be tempted to buy them from mittlemotor. But for the life of me I cannot find crap on their site.

How does anyone find anything there?


You must use the german webbshop, the english version doesnt work, not for me atleast.
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924RACR  



Joined: 29 Jul 2001
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Location: Royal Oak, MI, USA

PostPosted: Tue Mar 26, 2019 7:35 pm    Post subject: Reply with quote

Grinding the crank should actually be pretty cheap... maybe about the cost of bearings. But remember, once you grind it, you can never go back!!!
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safe  



Joined: 18 Mar 2017
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Location: Sweden

PostPosted: Tue Mar 26, 2019 7:53 pm    Post subject: Reply with quote

924RACR wrote:
Grinding the crank should actually be pretty cheap...


Lucky bastards!
Around here it would be an easy $250 for a 4 banger, not to mention that you would hand in your crank and then get it back 4 months later...
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Goldwolf  



Joined: 25 Jun 2017
Posts: 223
Location: Athens,GA

PostPosted: Thu Apr 04, 2019 3:00 am    Post subject: Reply with quote

So the engine builder here will machine the crank for $135.
I paid $125 for the .25 oversize.

Mittlemotor price for me is $288 shipped, works out about the same overall cost.

Of course if you wait on the EBS bearings it is cheaper.
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snakoil  



Joined: 09 Feb 2010
Posts: 362
Location: Montreal, Canada

PostPosted: Thu Apr 04, 2019 10:01 pm    Post subject: Reply with quote

Are we talking about Crankshaft bearings here?
I had a set of OEM size bearings from victor reinz but my crank had to be turned and I got oversized bearings to match.
I can sell and ship the box I have if someone is in a rush.
I'll have to take a picture first to ensure I'm talking about the right thing as I'm new to the engine rebuild world.
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