I had a question about the ARP main stud torque specs.

ARP said use 75lbs honda says 49lbs for 1 and 5 and 56lbs for 2-3-4 for GSR and 56lbs for LS. im using a LS block with aftermarket girdle.

I put some ACL race bearings in and torque them to ARP's specs and its out of round .0015, i get .0015 clearance on all 5 main caps but its out of round on the sides. Its .003 on the sides and .0015 up and down.

Then i loose them up and torque to 56lbs and my clearance is .002 which is what im shooting for, but its also out of round a little bit. Only .0003-.0005.

My question is what do you engine builders do when you use ARP main studs.

 

you are supposed to have it align honed

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">you are supposed to have it align honed </TD></TR></TABLE>

Absolutely!

3 or 5 main girdle?

 

You'd think ARP would give you some kind of warning with their rod bolts and main studs, something along the lines of "DO NOT JUST INSTALL THESE W/O MACHINING!!!". LOL

 

true lol

just like resizing the big end of oem rods when using arp rod bolts that uses higher torque specs

 

alright thnx. i was trying to avoid spending an extra $139 but i guess i have to.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tdo &raquo;</TD></TR><TR><TD CLASS="quote">alright thnx. i was trying to avoid spending an extra $139 but i guess i have to.</TD></TR></TABLE>

Lol, you have got to be kidding.

the world according to tdo

$139 machining &gt; cost of a motor


Modified by mar778c at 5:27 PM 6/11/2008

 

i have arp main studs in my engine, i never checked for roundness, i just torqued them to 70 and rode out. ive had them for almost 2 years and never had a main bearing problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SPOOLINmatt &raquo;</TD></TR><TR><TD CLASS="quote">i have arp main studs in my engine, i never checked for roundness, i just torqued them to 70 and rode out. ive had them for almost 2 years and never had a main bearing problem. </TD></TR></TABLE>

Lol. So, is that what you recommend?

 

just use factory bolts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rota92 &raquo;</TD></TR><TR><TD CLASS="quote">

But are you running an aftermarket girdle?</TD></TR></TABLE>

no, mine is an ls block with no girdle

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">

Lol. So, is that what you recommend?</TD></TR></TABLE>

well not actually. LOL


Modified by SPOOLINmatt at 11:10 PM 6/11/2008


Modified by SPOOLINmatt at 11:11 PM 6/11/2008

 

Yep<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">you are supposed to have it align honed </TD></TR></TABLE>



Yep...I remember Jim Stewart ran into this problem on the first couple B-Series Engines he did for me in 2003. Being his genie-pig was expensive

 

OP worte "im using a LS block with aftermarket girdle".


You need to align bore the block. Any machine shop can tell you that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">

Lol, you have got to be kidding.

the world according to tdo

$139 machining &gt; cost of a motor


Modified by mar778c at 5:27 PM 6/11/2008</TD></TR></TABLE>

haha, i guess im cheap.

 

Whats wrong with just using oem main bolts?

 

thats actually a really good price for an align hone, someplaces are charging 250.00

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">thats actually a really good price for an align hone, someplaces are charging 250.00 </TD></TR></TABLE>

Thats what we charge, it is not a an easy process.

 

yea i paid 150 for mine and what the shop did was flycut the block and didnt touch the caps since they're were dowels in all the holes.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">thats actually a really good price for an align hone, someplaces are charging 250.00 </TD></TR></TABLE>

wow really? i didnt know align hone cost so much.

what kinda clearance you guys running on your bearings? i was shooting for .002 and the guy that was gonna do my align hone said he use .003 all the time on boosted cars.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wed3k &raquo;</TD></TR><TR><TD CLASS="quote">yea i paid 150 for mine and what the shop did was flycut the block and didnt touch the caps since they're were dowels in all the holes.</TD></TR></TABLE>

yea thats what they were telling me. they gonna cut a little off the block and caps then hone to factory specs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MikeySpec &raquo;</TD></TR><TR><TD CLASS="quote">Whats wrong with just using oem main bolts?</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2point2 &raquo;</TD></TR><TR><TD CLASS="quote">Quote, originally posted by MikeySpec »
Whats wrong with just using oem main bolts?
</TD></TR></TABLE>

yep, OEM Main Bolts in our 700+ HP Race Engines

 

New?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innes &raquo;</TD></TR><TR><TD CLASS="quote">

yep, OEM Main Bolts in our 700+ HP Race Engines</TD></TR></TABLE>

But With what motor? LS or GSR? he is using a ls with an aftermarket girdle for extra precautions.

I would do the same, just like so many others have in the past

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rip94delsol &raquo;</TD></TR><TR><TD CLASS="quote">

But With what motor? LS or GSR? he is using a ls with an aftermarket girdle for extra precautions.

I would do the same, just like so many others have in the past</TD></TR></TABLE>

i missed that part then about him having an LS engine

we use GSR Blocks with the OEM Girdles with the OEM Main Bolts

 

My vote goes for oem bolts as well. If you want to use arp studs because you think they are stronger go ahead, but why put more tq on them? Something that distorts and changes bore sizing does not sound good to me. Plus oem tq specs are given with oil. If you use their lube, it will put even more tq. on those studs.