[Fot] Connecting rod question

[Barr, Scott]

I had the same experience with the dinky little ¼” ARP rod bolts in my Carrillo set.  I had a hard time trusting them.  I did measure them for yield each time I used them, but I mostly went by feel while torquing them up.  There were just times when you could feel them stretch the normal amount and some times when you could feel them streeeeeetch a bit more.  I replaced them at that point, regardless of what the measurements said.  Never had one break in use though, while I did have a 5/16ths ARP rod bolt break in a lightened stock rod.

Scott (B.)

From: Fot <fot-bounces at autox.team.net> On Behalf Of Scott Janzen via Fot
Sent: Wednesday, January 25, 2023 3:42 PM
To: Brad Eells <tr4abrad at gmail.com>
Cc: 'Friends of Triumph' Triumph <fot at autox.team.net>
Subject: Re: [Fot] Connecting rod question

the carillo rods, at least for the GT6 - same, I think as the Spit and the TR6 - do have these dinky little 1/4” bolts. I’ve never had a failure in action, but did overstretch one because I used ARP lube instead of Carillo lube - the arp lube is slicker.  Those bolts cost about $42 each!  I now use the correct lube, measure them before and after I install and uninstall them, etc.  No issues at 7000 rpm, just about every shift.

On Jan 25, 2023, at 2:48 PM, Brad Eells via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:

Walt,

I went with Pauter rods for the Spitfire due to the use of a larger rod bolt than Carillo.

Marty Sukey posted some very nasty pictures of his Carillos and a rod bolt failure…good enough for me.

Not sure how it will apply to TR6 items but worth a look.
Brad Eells
Sent from my iPhone


On Jan 25, 2023, at 11:33 AM, Walt Hollowell via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:

I have built a few full race engines for my TR6 using MaxSpeeding connecting rods with acceptable results. For my next build I am considering Carrillo rods which run about $650 more than the MaxSpeeding rods.
Do and FOT members feel that the Carrillo rods are worth the extra bucks or should I be happy with the MaxSpeeding considering the affordability?
Thanks,
Walter Hollowell
Albuquerque, New Mexico

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