|
|
|
|
Original Message
|
| RE: I recall that issue. |
| By Gerry Proctor - 02/23/2005 8:13:41 AM; IP 207.133.188.254 |
He had an initial reply and had a follow up in the next month's issue because, well...he was all messed up on about everything.
How long a rocker lasts is a function of manufacturing and user installation. In the early years (like the 60s and early 70s), aluminum roller rockers were not very well made and had limited life. They were prone to cracking due to cyclic fatigue. Alloys and manufacturing processes have improved to the point where a quality roller rocker will have the same endurance as a traditional stamped steel rocker.
But the real issue he was addressing was the return on investment. The reduction in friction (and for FE rollers, there are the full rollers and the ones with bushed fulcrums) is very minor and would never return the investment even in fleet use. It's also doubful that the other benefit -reduction in valve side loading- has any statistically significant return either. Sure, you can proove both of these things are absolutes but whether they're worth the expense is the real question.
Would I use rollers with a big cam and high spring pressure (like 180 on the seat)? No doubt about it...yes. Would I use them on a fairly stock engine? Naw. There are plenty of other easy to find rat holes to throw money down. |
|
|
This thread, so far...
|
|
|
|
Post A Response
|
|
|
|
|
|