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post #1 of 20 (permalink) Old 05-24-2010, 11:06 PM Thread Starter
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Main studs

What is the true advantage to running main studs over main bolts? Less main walk? Do they handle more power or only theoretically? I am trying to get some info here.

Thanks

Early99 CC LWB 4X4
Updated B codes, Modded H2E, Big oil, half filled block, studded, John Wood 4R100. 232K miles
Tows like a champ!

"Damn Larry, he passed us like a freight train passing a hobo!"
--Lisa P.

Just sold to Larry
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post #2 of 20 (permalink) Old 05-24-2010, 11:12 PM
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Re: Main studs

to be honest the only time i have seen the mains studded is when running a girdle like wop's etc. I was thinking they went to studs for holding power plus they could be longer.

would be interesting to see.

Early 99 f350 4x4 crew cab, auto. pmt2 pcm
2001 cup holder ,T500, MAX AC ASSIST AC mod, Diy Twin tymar, TS chip, Powerslots & Hawk pads, ford AIC, ..... with big fat want to list.
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post #3 of 20 (permalink) Old 05-24-2010, 11:19 PM
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Re: Main studs

You can use higher clamping force.

But it you up the torque on the mains you must align-hone it.
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post #4 of 20 (permalink) Old 05-25-2010, 02:53 AM
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Re: Main studs

Yes, just more holding 'clamp' force. However if you clamp the caps harder you will 'oval' them just enough thousandths that you need to have the engine torn down and have a line hone run through the mains to circle them back up.

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post #5 of 20 (permalink) Old 05-25-2010, 03:06 AM
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Re: Main studs

SO is it worth it or not? Do the bolts ever stretch or let go where having a stronger stub even if at the same tq would be worth it?
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post #6 of 20 (permalink) Old 05-25-2010, 03:26 AM Thread Starter
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Re: Main studs

Quote:
Originally Posted by PowerstrokeJunkie View Post
Yes, just more holding 'clamp' force. However if you clamp the caps harder you will 'oval' them just enough thousandths that you need to have the engine torn down and have a line hone run through the mains to circle them back up.
Not a big deal, it is on a stand anyway.

Quote:
Originally Posted by TARM View Post
SO is it worth it or not? Do the bolts ever stretch or let go where having a stronger stub even if at the same tq would be worth it?
Precisely what I want to know.

Early99 CC LWB 4X4
Updated B codes, Modded H2E, Big oil, half filled block, studded, John Wood 4R100. 232K miles
Tows like a champ!

"Damn Larry, he passed us like a freight train passing a hobo!"
--Lisa P.

Just sold to Larry
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2-17-2019: 97 CC LWB 4X4 7.3 with full banks kit, John Wood E4OD. 139K miles
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post #7 of 20 (permalink) Old 05-25-2010, 03:32 AM
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Re: Main studs

Quote:
Originally Posted by PowerstrokeJunkie View Post
However if you clamp the caps harder you will 'oval' them just enough thousandths that you need to have the engine torn down and have a line hone run through the mains to circle them back up.
Zactly.......And if the torque spec is not followed to a T they will distort as well.

FWIW with just the outer studs torqued my mains grew by .003, torque the inners with the girdle on and it went back into spec.
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post #8 of 20 (permalink) Old 05-25-2010, 03:32 AM
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Re: Main studs

On a stand....what happened w that.
I have been workin on cloneing your rig.

If it was out , id be checkin the oil pan
Maybe even think about fillin it,
thou I am not liking the oil heat thread right now with that.

Early 99 f350 4x4 crew cab, auto. pmt2 pcm
2001 cup holder ,T500, MAX AC ASSIST AC mod, Diy Twin tymar, TS chip, Powerslots & Hawk pads, ford AIC, ..... with big fat want to list.
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post #9 of 20 (permalink) Old 05-25-2010, 03:45 AM Thread Starter
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Re: Main studs

Quote:
Originally Posted by southmike View Post
On a stand....what happened w that.
I have been workin on cloneing your rig.

If it was out , id be checkin the oil pan
Maybe even think about fillin it,
thou I am not liking the oil heat thread right now with that.
The motor I burnt a hole in piston #1 is being rebuilt because the backup motor I have in the truck is worn out. It is basically a core, not a driver.

Early99 CC LWB 4X4
Updated B codes, Modded H2E, Big oil, half filled block, studded, John Wood 4R100. 232K miles
Tows like a champ!

"Damn Larry, he passed us like a freight train passing a hobo!"
--Lisa P.

Just sold to Larry
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2-17-2019: 97 CC LWB 4X4 7.3 with full banks kit, John Wood E4OD. 139K miles
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post #10 of 20 (permalink) Old 05-25-2010, 05:52 AM
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Re: Main studs

The main caps walk if you don't stud them, this can lead to pinching off the oil wedge and spinning a bearing or breaking the cap and main webbing right off the block.

2011 335i M-Sport
2000 F-250 7.3L ( Sold )
1966 Mustang Fastback

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