[Fot] Spitfire head torque

[Chuck Gee]

Just keep in mind that if you use the ARP lube the recommended torque is 40
ft-lbs.  Also, if you tongue them hot you will be relieving the stretch when
the motor cools down.  This is not a good thing.  Proper stretch is what is
important.

Chuck

On Apr 15, 2013, at 7:48 AM, "Robert MacKenzie" <list at mackenzie.aero> wrote:

> Tim:
>
> I have been using 60 ft/lbs on my 1147s with ARP studs/nuts and a Payen
> gasket.  I pull to 60 with 3 pulls of 20, 40, then 60.  I let the head sit
> overnight (cold) then retorque to 60 again.  Since following this process I
> have had no issues with head gaskets.
>
> The ARP numbers for the studs are:
>
> Head Stud - AJ 4.250-1SFB
> Nut - AJN 12-1
> Washer - AJW 750N
>
> They can be ordered from Summit Racing along with the 10 stud 1500/1296
kit.
>
> Robert MacKenzie
>
>
>
> -----Original Message-----
> From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
> Behalf Of Tim Pettenati
> Sent: Saturday, April 13, 2013 10:41 AM
> To: fot at autox.team.net
> Subject: [Fot] Spitfire head torque
>
> Checking on what folks are using for torque spec on head nuts?
>
> 1147cc
> Spitfire with studs upgraded to 7/16" ARP and Payen gasket.
>
> Also if anyone
> knows what the ARP partnumber is for the 7/16" studs.
> I'm guessing they are
> the same as the GT6/TR6 kit but would like to know for sure.
>
> Thanks,
> Tim
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