Eagle rods in a 2g

[Turbo Juice]

well let me start off by getting something confirmed. is it true that for 1g rods to fit in a 2g motor you need about 200 bucks worth of machining?

well if that is true then i am getting eagles. do eagles need any type of machining to fit properly? i will be running nippon racing .020 pistons and a stock crank.

 

[Enraged78]

1G rods need to be machined for 2G pistons. The crank end is the same size, the wrist pin end is not. It has nothing to do with the block, as the bore of the two motors is the same. If you're planning on running forged pistons, you might as well run forged rods. Eagle rods are very good rods for the money, but are known for being out of round and sometimes plus or minus a few grams a piece from the factory. Have the machine shop you're working with check the roundness of the large and small end of the rods before you think about installing them. If they have to be machined, you'll wind up paying for it. Make sure that the rod weights match before you install them as well. This should also be done with your pistons, wrist pins, crank, flywheel, and harmonic balancer. A good machinist will also take into account bearing weights. Having your rotating assembly zero-balanced is a very good idea on a motor you plan on keeping for a while. Have your crank looked at by the machinist as well. Crank specs are in your factory manual. If the crank is out of spec, toss it. Screwing around with a 2G crank is not worth it. 1G 6 bolt's are a different story if you want to get it re-nitrided. If it's well within spec, have it micro polished, but do NOT cut it. Get bearings to match the crank based on the measurements provided by your machinist. Doing all this in conjunction with the removal of the balance shafts will give you a strong, smooth, and reliable 4G63.

P.S. 7-Bolt Eagle rods require the use of 1G rod bearings (they are a bit bigger). You'll see a note on the inside flap of the box, where you'd never think to look for it.

Matt.