Now I have a quesiton. Why do the BC solid rollers wear out springs so quickly? I got my motor from a guy complete with 300 miles and a crane solid roller. How quickly will the springs wear out with street driving and abuse? I will not run it at the track much (as E-town is 2 hours away), but that doesn't mean it won't see a few blasts. What would I look for? Obvious cracks? or more subtle things? Thanks,
Hi Chris, the ONLY way to extend spring life, this is especially true in BB's, is to run the lightest components between the lifter and the "head" of the valve. The spring is the only item here that maintains stability, every other piece in the equation is trying to overcome that one item (this includes the pushrods). We've seen circle-track units get more than a season from springs when they run Titanium valves. We are aware of the initial cost, but it's more than offset by the amount of the cost of a number of spring changes over time. A decent set of springs now runs about $300.00+ for SB's and $350.00+ for BB's. You can use lower priced springs, but with a yet higher risk factor. We feel it's not "safe" to go more than 1 season with the same springs on a street-car, where much time is spent idling (normal driving in our area), at traffic lights and stop signs. Most important, don't run 3/8" stems in BB's, no Chrome-Moly retainer's, and pay close attention to ALL the weights of the components, even down to R/A weight. Get hold of Moroso's
"on the car" spring tester and keep a close watch on the springs. DON'T sit the unit through the winter with any valves "open". Back off the R/A's or run it (not necessarily drive it) occasionally during the Winter if it's going to sit for any length of time. Thanks, Gary in N.Y.
P.S. On a final note here, try to run a "rev-kit" in ALL (roller) street-cars, it keeps the lifters from "slamming" into the lobes on the opening side of the ramps at the point the lash is absorbed. This is tough on the "wheels". Also make sure you use "Race-oil" only. We're in the process of staying with Valvoline "Race" and Pennzoil (25W-50) at the request of many customers. The 25W-50 Pennzoil in particular is designed for gas, methanol, and "nitro" fuels.