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Triumph Connecting Rods with Stress Relief Hole


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I confess I never weighed one myself - until now. With an un-reworked fleabay acquired example our postage scale read 1 lb 7-1/4 oz. which I converted to 660 grams ( +/- 7g due to the scale's 1/4 oz increments ).

 

My previous info was from a noted ( notorious? ) UK specialist who proudly tendered some reworked examples quoted at slightly over 700g each, after having been lightened. Returned after purchase due to vice marks in the sides they nonetheless appeared to have gone on a diet.

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Hi Tom,

 

ah yes, our mutual friend . . . . bullshit baffles brains.

 

Perhaps reworked Vanguard 6 or early 2000 rods ?

 

I've seen those offered before now, and/or also unmolested ones offered as an (unfair) heavyweight comparison with whatever demon lightweight rods are being suggested . . . .

 

Cheers

 

Alec

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Thanks ( again ) for setting the record straight[er] - my innocence knows no bounds ( don't I wish! ).

 

Still, ~ 250 g lighter per rod in Carrillo's case is a !@#$%! savings and you can really feel it compared to weight-matched originals. At the time I had been offered some Arrows if I recall correctly at scant weight savings but supposedly unbreakable - problem was they wouldn't fit from the top unless bored to 2.6L+!

 

I'm tempted to buy another set in case the supply dries up; they're so pricey I fear the demand won't support continued manufacture much longer...

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146454

Flatlandsman is correct.

Either type can be lightened in a lathe by reducing the big-end mass.

Both types are forged steel & do not fail except under extreme duress.

Certain repro rod bolts caused failures around 15 years ago- not the rods' fault.

The earlier type look much better; use them for that reason & the saving of up to 30g/rod.

Save up & buy billet rods for complete peace of mind- maxspeeding are perfectly adequate for road engines, Carrillo for motorsport.

End of.

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