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#1 | |
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It bears mentioning that there can also be issues with pushrod angularity. Steep angles between the lifter and pushrod will cause bias pressure on the lifter. I have offset lifters on my modified engine to try to compensate for the difference in width between the lifters and the rocker arms. They are top-shelf lifters but even with 50 passes on them, you can see the wear pattern from the pressure bias. The fix is to machine the block so the lifter bores align with the rockers, side to side. That way the pushrods will be straight without using offset lifters. With the splayed head, the bore angles also need to be changed front to back to remove the angularity caused by the valve/rocker placement. The lifter bores for my application need to look like a standard BBC.
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SS/BS 1921 |
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#2 | |
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200 lbs might work on a small valve motor. |
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#3 |
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SCCA gets around the parts availability problem by having a 30 year rule. No car older than 30 years in national competition in "Street" (which is the closest class to NHRA Stock). It does provide a progression to more modified classes as cars age out.
How many Stockers out there are older than 30 years compared to newer? Would you rather have a 30 year rule or pay $2K for lifters?
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Jeff Laferty Suffolk, VA |
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#4 | |
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Let's look at this another way, "would you rather have a 30 year rule" or a valve spring rule?
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Billy Nees 1188 STK, SS I'm not spending 100K to win 2K |
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#5 | |
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Valve spring rule gets my vote.
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#6 |
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remember, well. Run rollers gets my vote.
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#7 |
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Roller lifters have been OEM in many motors starting in the 1990s. There is probably 1/3+- of the current stockers using them now. Many if not all were originally hydraulic. It would be naive to believe cam grinders are not taking advantage of having a roller lifter for those motors. Other advantages of these combos are programmable ecu's and efi.
I don't believe rollers for everyone are another step towards SS. Having them available to all would take that advantage away from the "modern" combos.
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Phil Vos |
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#8 |
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Terry, if I might ask here.. What combo is your car ? OEM hydraulics or solids?
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#9 |
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#10 |
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Got one 52 years old, one 36, and the ''New" one is 7.
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