Nuts and bolts

[05sonicblue]

Do I really need to go with ARP flex plate bolts, cam sprocket bolts and harmonic dampener bolt ? I have Arp everything else on the short block including head studs. My fully forged short block Is rated for 1000hp. I'm trying to get this thing built but these bolts and gaskets are killing me.... Thanks for your input.
Don

 

[NoviBlownGT]

Honestly I went all ARP with mine. It probably wasnt necessary but, why not. Good for piece of mind.

 

[05sonicblue]

Thank you, for an answer. I'm thinking the same thing but really don't think it's necessary

 

[travelers]

As you said, you have ARP on everything else why stop now on these parts that need it?

 

[05stroker]

The answer to your question is no, that said if not you will need new Ford bolts for those locations and not reuse the old ones.

 

[eighty6gt]

Friend of mine used arp bolts to mount the cams on his 4.6 dohc, rather than the tty bolts the factory originally spec'd.

Lost an engine or two as a result. The gears couldn't handle it.

 

[05sonicblue]

Friend of mine used arp bolts to mount the cams on his 4.6 dohc, rather than the tty bolts the factory originally spec'd.

Lost an engine or two as a result. The gears couldn't handle it.

Ok now I'm in a pickle I CANNOT Afford to lose a motor.

Maybe they weren't torqued to spec?

 

[eighty6gt]

Guy is most careful person I've ever encountered. They were used according to sound engineering practices and/or to ARP's specification.

I would use OEM fasteners as specified by Ford wherever possible.

 

[05sonicblue]

Thanks for all the info. For these bolts I'm going to go with ford parts.

 

[BruceH]

Guy is most careful person I've ever encountered. They were used according to sound engineering practices and/or to ARP's specification.

I would use OEM fasteners as specified by Ford wherever possible.

FWIW this is what I've always done. TTY bolts are more costly for a manufacturer to use vs a non-yielding stud or bolt. I'm not sure where the idea came from that all factory parts are garbage because a whole lot of thought goes into it.

The biggest reason to use tty hardware is to ensure proper clamping force is applied for the application. TTY yields at the proper clamping force. This means that a part cannot have too much force applied to it because the hardware enters the plastic state when the correct load has been reached.

All of this means no warped heads from torqueing the studs, no chance of screwing up the clearance on the mains with factory components, etc.

You will be just fine with Ford factory parts. The same will not be true with GM factory hardware for say an LS motor. Just because one manufacturer specs crap doesn't mean they all do.

 

[travelers]

The race car I work on makes 1015HP stick with 15" slicks and we only use ARP bolts. especially on the drive line (flywheel) as well as the engine. Never had a problem.

 

[05sonicblue]

Thanks for all the info. For these bolts I'm going to go with ford parts.

And ARP flywheel bolts.

 

[RED09GT]

I am doing the exact opposite of the OP. I'm using tty mains, head bolts, camshaft phaser bolts and ARP flywheel bolts and crank bolt. The stuff holding the insides of the engine is all from the manufacturer but for stuff bolting onto the crank I am happy to use re-useable stuff from ARP.

My only ARP's on the inside are the rod bolts.

 

[BruceH]

I am doing the exact opposite of the OP. I'm using tty mains, head bolts, camshaft phaser bolts and ARP flywheel bolts and crank bolt. The stuff holding the insides of the engine is all from the manufacturer but for stuff bolting onto the crank I am happy to use re-useable stuff from ARP.

My only ARP's on the inside are the rod bolts.

Same here. I do have an arp crank/balancer bolt though. I'm of the opinion that if there is enough cylinder pressure to lift one of Fords tty head bolts then I'd much rather have the bolt act as a fuse and let the pressure off by lifting the head vs a catastrophic failure with the excess cylinder pressure contained and finding the weakest point which probably would be a piston top, block, or rod. But that's me.

OP sorry for the semi rant, as you can tell it is a pet peeve of mine. ARP flexplate/flywheel bolts will work just fine for you. I wasn't aware that they made phaser bolts for a 3v. It's a fairly complicated bolt to manufacture.

 

[TexasBlownV8]

Is ARP making a proper cam phaser bolt now, with the oil passages?

 

[05sonicblue]

Arp part # 256 1001 is what I am looking at. Are these incorrect or cause issues? Please share!

 

[Wes06]

They don't look machined for oil passages?
Unless it's just a stock photo