ARP head bolts?
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ARP head bolts?
I am now in a position to fit my heads on the 4.6. C/R is 10:1
Is it going to be a road going car and limited to 5000 rpm.
Would you guys use ARP bolts or just standard head bolts?
Has anyone got a old used set I can use? I want to dry build the heads up so that I can check piston/valve clearance before I bolt it all down properly.
thanks Mark
Is it going to be a road going car and limited to 5000 rpm.
Would you guys use ARP bolts or just standard head bolts?
Has anyone got a old used set I can use? I want to dry build the heads up so that I can check piston/valve clearance before I bolt it all down properly.
thanks Mark
Mark
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I will go for ARP studs..
Less stress for block thread.
I´t will reduce craking symptons.
Those STD 4.6 torque settings are bad for aluminium.. First 90deg is approx 100Nm, and you wont need anymore.. I have been build many cross bolted engines and i usually torque those heads at firs 90deg, and thats it. And they run without head gasket issues..
Less stress for block thread.
I´t will reduce craking symptons.
Those STD 4.6 torque settings are bad for aluminium.. First 90deg is approx 100Nm, and you wont need anymore.. I have been build many cross bolted engines and i usually torque those heads at firs 90deg, and thats it. And they run without head gasket issues..
Timo
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That's good to know,TVR Beaver wrote:I'd get the John Eales ones.. longer thread so spread the load more
I didn't realise studs with longer threads were available off the shelf.
I extended the threads on my ARP's by 10mm as I have had one pull out previously. It was probably due to a duff thread in the block but I have always been half convinced that the ARP thread length was borderline and more suited to a cast iron Block.
Denis
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yes.. he has them made special for the Ali blocks... so they go close to full depth....
they are also cheaper than ARP and very good quality
only down side is they didn't have any Allen-Key hole in the end (although he did say the next batch would have it)... so I put a slit in the end of mine before fitting so I could remove them if required
they are also cheaper than ARP and very good quality
only down side is they didn't have any Allen-Key hole in the end (although he did say the next batch would have it)... so I put a slit in the end of mine before fitting so I could remove them if required
Sorry to thread hijack, but does John Eales also have mains studs too? If I recall from my last build, the ARP mains studs don't use the whole thread length either.TVR Beaver wrote:yes.. he has them made special for the Ali blocks... so they go close to full depth....
they are also cheaper than ARP and very good quality
only down side is they didn't have any Allen-Key hole in the end (although he did say the next batch would have it)... so I put a slit in the end of mine before fitting so I could remove them if required