246 ARP head studs

Why do you want to replace them?
Superformance has something suitable, if you have to...

Regards, Alberto

 

Send them a sample. They have made many Ferrari studs for me and many others but to my knowledge none are a catalog item.

 

Because Ferrari studs are crap.

Might as well go to ARP and get good ones like all the others who want to build good motors.

 

How about Dino studs? They are FIAT...

Regards, Alberto

 

Want to make a group buy?

Regards, Alberto

 

It has been 2 decades since I spent alot of time doing street Dino motors...in my recollection, these are really not very good studs...prone to erratic stretching, along with cut-as oppoissed to rolled- threads...

I have used many ARP studs in may street and comp engines, they are made to order..
There is, in my recent experience, no "stock number" item for vintage Ferrari block studs.. of any ilk...

 

+1

How do you remove the old studs? Any change of them breaking in the root?

Regards, Alberto

 

Greetings Gents,
In John Corbani's Dino Saga 051218, you'll see some pretty convincing pictures (I've attached 'em here)...and perhaps find the ARP part number (4206573)!
http://www.ferrarichat.com/forum/showthread.php?t=86723

And, to address your last question, Alberto, I'll see if I can find the reference...I think it was in the 3x8 section...to that potential pitfall: A stud sheared off flush with the block when attempting to remove it!! Yikes.!

At any rate, changing them sounds like the prudent thing to do.
Cheers,
Coop
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Alberto,
In this forum, I found one thread by utah4re regarding a "long stud," where John C. replied that one of the studs in his engine had sheared off just below the block deck(!), and mentioned how it was removed.
http://www.ferrarichat.com/forum/showthread.php?t=209096&highlight=head+stud

Wait for some advice from those who have successfully removed those studs and/or remnants of same. It'll save you some grief and sleepless nights, for sure!
Coop

 

Dinoparts.de has very good ones

 

OK, it looks like 4206573 is a T. RUTLANDS part number. $31.14, each.
http://www.trutlands.com/advanced_search_result.php?keywords=4206573&osCsid=8264286135f3b0504c1ae11e321b6b96
I don't know who they get 'em from.

I'm waiting for a call back from an ARP rep; the facilities are about thirty minutes from my house. I'll update this after I talk to him.
Coop

 

Here we go,
A post by Nick Scianna--of Nicks Forza Ferrari fame. (NOTE: This was in regards to a 308 engine, so the stud dimensions are not the same, but the procedure is likely the same.)

Good Luck,
Coop

 

http://www.superformance.co.uk/a-246/eg.htm

Anybody else used their head studs? They are ready, and at a very reasonable cost.

Regards, Alberto

 

My reading of the situation is that the block is the weak link here and making the studs stronger might be futile.
I originally ordered dinoparts studs, the thread on the block end extends about 4 threads out of the surface of the block when fully engaged in the block - so they are loose. I didn't like this so ordered superformance parts - they are identical to the original - they seem to have performed ok.
For reasons outside my control I am now rebuilding this engine after only 250 miles. Other findings of interest are; you need to seal the studs in the block or coolant leaks up them and upon dismatling I rechecked the torque settings - several of the carb side studs where not fully tight where I had left them -I will be retorquing the head nuts after the run in period this time!

 

Hi,
Digging up this old thread as I'd like to know if anyone ended up using ARP head studs or went with Superformance?
Thanks, Andrew


edit: Not sure where Superformance gets their studs from, they might be ARP for all I know...