12-20-2013, 08:12 AM #1
Carrillo Connecting Rod VS Molnar Connecting Rod
which is better for the turbo motor??
12-20-2013, 11:00 PM #2
I'm personally a carillo fan, I just orderd a new set of carillo rods and cp pistons for my new build ( same company) and the pistons where so exact the machine shop did not even have to number which bore they will go in to. I've never had a problem with the rods and they held up to 20+ lbs of boost at 9000+ rpms
12-20-2013, 11:30 PM #3
- Join Date
- Jul 2008
Dan from jet draft (jd1) runs the molnar rods at 10,000rpms with 30 pounds of boost. That was enough to sell me. He praises the Molnar's up and down.
12-21-2013, 08:17 AM #4
I run my stock setup at 9300rpm with 22 psi of boost
12-21-2013, 01:00 PM #5
I Can't knock the Molnar stuff But the Carrillo stuff is top Notch. There bolts (Carrillo) are the best in the market by far!!!! I have had zero Issues with any of there Products.
12-21-2013, 03:39 PM #6
Getting correct size bearings to work with the Molnar is way easier. Price Hold both in your hands and then compare. I had a set of carillos fail on me when I first started building the Yam 4cyl. That doesn't mean the Carillos are bad it is just my experience.
Design, style, hardware, weight are the same so why the huge price diff?
12-22-2013, 09:15 AM #7
The Molnars are all machined specifically to a size 4 on the big end so you can use Yamahas OEM sizing chart in shop manual to get the correct bearing color for correct OEM rod bearing clearances. Makes it very easy.
12-22-2013, 10:02 PM #8
Tom Molnar and I worked really hard to create perfect rods for this motor.
We used factory Yamaha drawings/blueprints for dimensions instead of taking an OEM rod, then measuring it and mimicking it. For example the big end dimensions are exactly a size 4, and the difference in big end diameter sizes from a 3 to a 4 is only .0002. Yes that's only 2 TEN thousandths.
Really critical stuff not only on bearing face to crank journal clearances, but in how the bearing shell fits the rod.
Also the Width of the H beam is a bit narrower than the competition, but that allows the thickness to be increased in the H Beam rails on the Molnars and centers the load carrying capacity of the rod more, making for a stronger H beam. Toms own personal design there.
Add the ARP 2000 bolts and you have one of the finest rods ever made.
12-23-2013, 01:04 PM #9
12-23-2013, 06:35 PM #10
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