degmwilliams
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| posted on 1/9/12 at 12:15 PM |
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St170 arp bolts
Is there any real point in changing my Con rod bolts for ARP bolts at about £60? I've never heard of these breaking and if ford made the st170
stronger and using forged con rods surely they used bolts that would stand up to it.
Building a tiger Avon st170 (slowly)
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FuryRebuild
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| posted on 1/9/12 at 01:44 PM |
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If you're not increasing the power then there's no need to change them as long as you haven't undone them. However, one has to bear
in mind that the reciprocating loads on bolts lead to fatigue, and the manufacturers specify their bolts to certain tolerances. I've never heard
of these bolts going, but I increased the BHP spec on my duratec from 130 to 215, and all the bolts are ARP.
Their production and design approaches are second to none and their bolts are so strong, they can be reused in certain circumstances that normally
they couldn't. For instance, my cylinder head bolts are going to be replaced with studs, and the studs can be reused. So, when I strip the
engine next and add uprated pistons and rods, I'll have saved the cost on the bolts straight away.
If you can afford them, fit them, buy peace of mind.
When all you have is a hammer, everything around you is a nail.
www.furyrebuild.co.uk
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snapper
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| posted on 1/9/12 at 03:06 PM |
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Con rod bolts are to manufacturers max revs plus a bit
For instance Pinto good to 6800rpm
Zetec red lines at 6500 so should be good to 7000 if you are reving to 7500 or 8000 I would go ARP
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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