Crate motors

[MLR19]

None of the tracks or series we run allows you to change rocker ratio, I think that is pretty much the standard.

[hipower17]

can u run any brand of rocker as long as its 1.5?

[brad hibbard]

there are a few outlaw sanctions that permit aftermarket and higher ratio rockers but for the most part and I truly mean the MOST part---the rocker arm ---push rod and valve spring are the tech areas concentrated on the most and there are no substitutions or upgrades permitted---must be the CORRECT GM part

Brad
www.race-1.com

[hipower17]

why do they call them powder rods and do they have the same dimensions as stock 5.7 gm rods and fit a sbc crank from say the 70's?

[Krooser]

The rods are made by putting a "powdered" steel into a form pressing/forging it to produce a high quality rod. It's then put into a sintering oven which heats the rod and bonds the powder together.

A regular rod is made from a steel "billet" then hammered in a drop forge.

I've found GM PM rods to work very well in limited HP applications. My sons B mod uses them and I have two more sets in stock in my shop.

[dirty white boy]

were sposed to been the next great thing in budget racing but there limitations came in lil lower than at first expected!! do great in limited hp builds and believe cat uses powdered metal rods in some of there motors!

[hipower17]

would these rods fit a two piece seal crank?

[hipower17]

what yr did gm make the upgrade to the rods?

[brad hibbard]

2010 ish
cranks made the change in 2010 for sure and rods followed
by 2012 I am sure we were on the new rod

brad
www.race-1.com