I just received my new rods š
These are made by Carrillo, a big name in motorsport. I took their standard (3/8 WMC H6) bolts, which are good to 8ā000rpm on our engines I was told. They also offer higher grade bolts for higher speed engines, but the cost is not justified on a (relatively) slow-revving turbo engine.
The rods are shot-peened, which enhances their crack resistance and gives them a satin appearance. The brand is laser etched in a very sharp and thin font.
They have a machined tang to keep the bearing from rotating (the OEM rods donāt have that cut and only accept plain bearings) and Iām going to use Kingās CR4604XP bearings with them.
Rods are not rated by horsepower, more by the cylinder pressure they can withstand and the RPMās they can support (which is also a bolt affair), but this depends on the bore/stroke, and piston assembly weight and acceleration. If you really wanted a number it would look like 275hp per rod.
Mine came with outdated instructions, the latest version for torque steps and bolts stretch is available online.
The Carrillo product number is SCR10227, aka F_BEB23_0HS_5878_B6H. They come with special bolt lube, neatly packed in individual boxes
For DIYers: You need a 7/16-inch 12-point socket to tighten the bolts, and a good torque wrench and angular gauge, and/or a bolt stretch gauge, which is the preferred way. The best is to land in the upper half of the stretch range (but never exceed it!) to ensure proper tension.
I weighted them on a lab scale. The average weight with the bolts of my particular set is 562.75g, min. 562.34g, max. 563.34g so the whole set is within one gram.
Iāll update this with the nominal weight (without bolts) when I get a chance.
The Ford rodās average for the set that came with my original engine is 593.46g, min. 590.86g, max. 596.06g, so the set spans 5.2 grams.
The Carrillo rods are thus about 5% lighter than OE (31g per rod) while being much stronger and RPM-capable. The weight tolerance is much tighter than OEM, actually three of them are within 0.5g of each other, with one outlier, but Iāll not try to chase the fractional grams and ruin the surface finish. Edit: I eventually did and matched the weights of all four to less than the 0.01g I can measure.
Some pictures:
These are made by Carrillo, a big name in motorsport. I took their standard (3/8 WMC H6) bolts, which are good to 8ā000rpm on our engines I was told. They also offer higher grade bolts for higher speed engines, but the cost is not justified on a (relatively) slow-revving turbo engine.
The rods are shot-peened, which enhances their crack resistance and gives them a satin appearance. The brand is laser etched in a very sharp and thin font.
They have a machined tang to keep the bearing from rotating (the OEM rods donāt have that cut and only accept plain bearings) and Iām going to use Kingās CR4604XP bearings with them.
Rods are not rated by horsepower, more by the cylinder pressure they can withstand and the RPMās they can support (which is also a bolt affair), but this depends on the bore/stroke, and piston assembly weight and acceleration. If you really wanted a number it would look like 275hp per rod.
Mine came with outdated instructions, the latest version for torque steps and bolts stretch is available online.
The Carrillo product number is SCR10227, aka F_BEB23_0HS_5878_B6H. They come with special bolt lube, neatly packed in individual boxes
For DIYers: You need a 7/16-inch 12-point socket to tighten the bolts, and a good torque wrench and angular gauge, and/or a bolt stretch gauge, which is the preferred way. The best is to land in the upper half of the stretch range (but never exceed it!) to ensure proper tension.
I weighted them on a lab scale. The average weight with the bolts of my particular set is 562.75g, min. 562.34g, max. 563.34g so the whole set is within one gram.
Iāll update this with the nominal weight (without bolts) when I get a chance.
The Ford rodās average for the set that came with my original engine is 593.46g, min. 590.86g, max. 596.06g, so the set spans 5.2 grams.
The Carrillo rods are thus about 5% lighter than OE (31g per rod) while being much stronger and RPM-capable. The weight tolerance is much tighter than OEM, actually three of them are within 0.5g of each other, with one outlier, but Iāll not try to chase the fractional grams and ruin the surface finish. Edit: I eventually did and matched the weights of all four to less than the 0.01g I can measure.
Some pictures: