[DeTomaso] Stock Rod Bolts

[Thomas Borcich]

Thanks Paul...I'm told that the ARP bolts have to be pressed in. Then the rod end needs
resizing which changes the weight...doesn't all this require removing the piston from the rod, 
if so the rings will lose their original alignment in the bores...then wouldn't that disrupt the 
breakin and seating that has already started?

My first thought was yep bang the bolts out and replace them and I'm done, then I read they have to be 
pressed in, and the machine shop I consulted said the rod end has to be resized because the ARP
bolts are slightly different requiring resizing.

I wasn't too worried about the rods, I read they are forged and have hear from some that 
they've seen the stock rods survive a 7500 rpm missed shift. I'm going to run a rev limiter 
at 6000 rpm so it should keep that from happening.

Tom 



> From: rimov at charter.net
> To: tborcich at msn.com
> Subject: Re: [DeTomaso] Stock Rod Bolts
> Date: Sat, 17 Jan 2009 10:26:43 -0800
> 
> Morning Thomas:
> 
> I am sure more knowledgeable people will chime in on your question but ARP 
> bolt are a very good investment but with that said you are more likely to 
> break a rod than to have a bolt failure. Changing to the ARP bolts will not 
> require you to rebalance the rotating assemble as all the bolt will be with 
> in a few nanograms of each other and simply moving the pistons up and down 
> to replace the bolts will not require re honing the bores
> 
> Paul
> ----- Original Message ----- 
> From: "Thomas Borcich" <tborcich at msn.com>
> To: "Pantera REALBIG forum" <detomaso at realbig.com>
> Sent: Saturday, January 17, 2009 10:16 AM
> Subject: [DeTomaso] Stock Rod Bolts
> 
> 
> >
> > My motors out on a stand, new armando pan going on (so while I'm at 
> > it!!!), reworked quenched heads,
> > and now I'm thinking I should add ARP rod bolts, after all they're staring 
> > at me.
> > The motor was rebuilt by the first owner and has under 50 miles from a 
> > complete rebuild with balancing.
> > If I go with ARP rod bolts the rod ends have to be resized which I would 
> > assume requires re-balancing?
> > And since I'm disturbing the rings, does it need a hone and new rings?
> > Will resizing the rod ends require new rod bearings? It just keeps going 
> > and where do I stop.
> >
> > Now the real question...whats the failure rate on stock rod bolts and rods 
> > if the motor is limited to 6000 RPM?
> > I expect mostly street use and track days a few times a year.
> >
> > Tom Borcich
> >
> >
> >
> >
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