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 Post subject: mains brace
PostPosted: Tue Nov 12, 2019 10:02 pm 
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Joined: Thu Apr 28, 2016 12:23 am
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Location: adelaide
i have a problem with the forged conrods hitting the mains brace , last time i filed a half round in the brace for clearance . this time im thinking of bolting the brace to top of the nuts because i have the length with arp studs . can anybody see a problem with that ?


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 Post subject: Re: mains brace
PostPosted: Wed Nov 13, 2019 6:24 am 
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Location: Bunya QLD 4055
Have you checked sump and oil pickup clearances?

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 Post subject: Re: mains brace
PostPosted: Wed Nov 13, 2019 2:48 pm 
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Location: adelaide
thanks for reply , no problem with oil pickup and sump . just worried if its still going to do the job of bracing 8-[ ordered some more arp nuts for it anyway


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 Post subject: Re: mains brace
PostPosted: Thu Nov 14, 2019 8:56 pm 
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Location: Australia WA
excellent build, no short cuts taken =D>
I suggest machining you main bearing caps flat.(level with nut surface) Remark them with # & direction. Make 5 steel straps 10mm thick, same width as cap and holes to match ARP studs centers.
This will strengthen you caps and allow existing brace to be used with single nuts.
Check that rod bolts also miss the sides of block and if beam style rods that they clear bottom of
the bore.

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 Post subject: Re: mains brace
PostPosted: Tue Nov 19, 2019 6:05 pm 
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Location: adelaide
thanks cappo good suggestion , just ordered 20x10 bright steel for the straps and 20x10 t6061-6 aluminium as well .
probably :roll: way over the top thinking.
thinking about internal stresses in the main bearing cap after machining about 5mm off the top might affect it and also using the aluminium for the straps instead of steel because of a difference in heat expansion rate

ps just tell me im full of s**t . this car is driving me loopy 8-[


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 Post subject: Re: mains brace
PostPosted: Thu Nov 28, 2019 6:42 am 
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Joined: Mon Aug 25, 2003 12:00 am
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Location: Brisbane
Theres no problem machining the back of the main caps flat,I used to machine them flat then fit a 12.5mm tool steel strap across the back of each cap for the higher hp builds

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 Post subject: Re: mains brace
PostPosted: Fri Nov 29, 2019 7:07 am 
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Location: adelaide
thanks dave , ive ready been told im full of s**t at machine shop , the caps are getting machine flat soon and i have ready made the straps from 10mm cold rolled steel


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 Post subject: Re: mains brace
PostPosted: Tue Dec 03, 2019 11:19 am 
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Joined: Thu Apr 28, 2016 12:23 am
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Location: adelaide
caps machined flat,
very big thankyou to cappy for the suggestion and dave (dmw)to confirm.
now i can go ahead and build :D


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