why 6.385" connecting rods?



why 6.385" connecting rods?

Postby grumpyvette » August 23rd, 2011, 9:28 am

"I am planning to build a 496 using a set of factory 6.135, 7/16" dimple rods that have been modified for full floating pistons. Typically these 496 'strokers' are built using an aftermarket .250 longer rod (6.385). Other than using the correct pistons for my factory rods what other considerations should I keep in mind?"


strength, obviously it depends on materials, design, care in manufacturing and which connecting rods are being compared properly prepared LS7 or L88 big block rods are a whole lot stronger than the stock 3/8" rod bolts big block rods, but many of the better aftermarket rods are significantly stronger that even the l88 rods
I beam rods typically have a balance pad and thats a good feature, typical H beam rods are SUPPOSED TO BE nearly identical in weight, as they are usually machined not castings (obviously they too occasionally need to be balanced)
the longer 6.385" big block connecting rods with the far stronger 7/16: arp rod bolts rods are typically used to provide both increased clearance for larger crank counter weights, making use of pistons with slightly longer skirts imposable, and pistons usually more stable, and making balancing MUCH less expensive, as mallory metal inserts are not normally needed with larger crank counter weights PLUS a slightly better rod angle for less ring drag.
also keep in mind aftermarket forged connecting rods with 7/16" ARP rod bolts can easily be 200% stronger than stock GM rods

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IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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