[DeTomaso] Stock Rod Bolts

[Thomas Borcich]

Will, that's good to hear. And yeah Charles, I can feel myself sliding down the slope and gaining momentum. My motor was totally gone through three years ago by the previous owner and then sat...less than 25 miles driving time (not broken in yet). It's a 72 open chamber motor, Cobra Jet with 4 bolt main with Edelbrock F351 4v intake, headers.  Bored .030 over, forged flatop pistons, balanced, new cam a bit hotter than stock, new lifters, bearings. The heads are stock with an Edelbrock F351 4V intake and the Edelbrock 650 spreadbore with vacuum secondarys.

I just couldn't resist closed chamber heads and now one thing is leading to another. I'm probably going to put a slightly hotter cam than whats there now 498 int/518 exh. I'd like to go to 550-600 lift? and for sure SS one piece valves, new springs, retainers, keepers and will probably clean up the casting flash just under the valves and polish the exhaust ports and roller rockers. I can't really justfy stroking, etc. Just not in my budget right now. I'm also waiting for Dan Jones tests on intake manifolds. But since I'm this far into the motor I don't want to leave a blatant weak link....like the stock valves or rod bolts if thats the case. Thanks for the comments.

Tom Borcich






> From: wkooiman at earthlink.net
> To: cengles at cox.net; tborcich at msn.com
> CC: detomaso at realbig.com
> Subject: RE: [DeTomaso] Stock Rod Bolts
> Date: Sat, 17 Jan 2009 18:16:28 -0600
> 
> The rod bolts are pretty strong, especially if the head is football shaped.
> Those are the boss bolts. Stock bolts are round with a flat on one side.
> That's based on what I've read.  I are no expert on the subject.  
> 
> I don't remember any failures that were bolt related.  They're normally
> block, valvetrain/cam related, or oiling related.
> 
> I'd pull the pistons and re-ring it, though, unless you know the rings are
> fairly fresh.  You'll probably need to hone it too.  I don't remember your
> block/piston status.
> 
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
> Behalf Of Charles Engles
> Sent: Saturday, January 17, 2009 1:09 PM
> To: Thomas Borcich
> Cc: detomaso at realbig.com
> Subject: Re: [DeTomaso] Stock Rod Bolts
> 
> Dear Thomas,
> 
> 
>                 Tom, Tom, Tom.   You are on a slippery slope.   The hardest 
> choice is to button up the oil pan and tell yourself that the 50 mile tested
> 
> re-build is everything you want and quit worrying about it.
> 
> 
>                 The most seductive option is to take any of the next small 
> slippery steps which do seem attractive and innocent:  new heads,  new rod 
> bolts, etc, etc.   The downside is that they all involve the upfront expense
> 
> and then the hidden expense of the next slippery step until you're looking 
> at an irresistible healthy new engine and a rather large bill from the 
> engine builder/machine shop.   One thing leads to another with engines.
> 
>               Others more experienced that I can answer your question, but 
> given your expected usage, I think that you would be fine with your current 
> set up of rods and rod bolts.
> 
> 
> 
>                                      Warmest regards,  Chuck Engles
> 
> 
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Thomas Borcich" <tborcich at msn.com>
> To: "Pantera REALBIG forum" <detomaso at realbig.com>
> Sent: Saturday, January 17, 2009 12:16 PM
> 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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