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ARP head bolts?
Posted: Fri Apr 04, 2014 2:23 pm
by Dixie6789
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
Posted: Fri Apr 04, 2014 8:35 pm
by mgbv8
For your application I would use standard stuff.
Posted: Fri Apr 04, 2014 8:37 pm
by Dixie6789
Thanks Perry. I was hoping that was the answer.
M
Posted: Sat Apr 05, 2014 7:08 am
by kokkolanpoika
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..
Posted: Sun Apr 06, 2014 10:49 pm
by jrv8
Mark,
Another vote for ARP studs .
Regards
Jim
jrv8.co.uk
Posted: Mon Apr 07, 2014 10:26 am
by TVR Beaver
I'd get the John Eales ones.. longer thread so spread the load more
Posted: Mon Apr 07, 2014 3:15 pm
by DEVONMAN
TVR Beaver wrote:I'd get the John Eales ones.. longer thread so spread the load more
That's good to know,
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
Posted: Mon Apr 07, 2014 3:41 pm
by TVR Beaver
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
Posted: Thu Apr 10, 2014 8:00 pm
by Dixie6789
Seems like Jim. I am going to call J Eales to see what they offer.
Mark
jrv8 wrote:Mark,
Another vote for ARP studs .
Regards
Jim
jrv8.co.uk
Posted: Thu Apr 10, 2014 11:12 pm
by ppyvabw
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
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.