Oil Starvation - Lifter Tick after session

[bcleaver]

I've never had lifter tick on the track. Specifically, at Lime Rock Park and Watkins Glen International. It only happens in auto-x.


I think it would be disallowed in certain classes because it offers an advantage over stock. That's probably one reason why it's allowed in a slightly modified class versus stock. It may not allow faster laptimes, but it still provides a benefit that can't be had off the factory floor.

It's a silly rule not to allow it in stock trim as I don't see any advantage. Slogging around more oil and more weight. It was legal in stx so I did it, but would have been annoyed not having that kind of insurance at the track just to meet an arbitrary rule. If the only benefit is it might keep your engine from letting go, I fail to see how that's restricted.

[terraphantm]

A lot of the SCCA rules seem unnecessarily restrictive, while others seem to give unfair advantages to other cars. For example, since we have cats in our manifolds, we can't really change our headers. Cars that have cats in their midpipe can. And then to add insult to injury, cars that have a set of secondary cats can delete their primary cats. That rule gimps our cars significantly, while it allows others (E9x M3, Z4M, WRX, Evo, etc...) to potentially get huge gains.

With regards to the oil pump and pan... I think the rationale is that if you don't have to worry about starvation, you can sustain more Gs and therefore potentially improve your laptimes. I think the benefit would be miniscule to a lot of the allowed changes though.

Personally, I just don't care what class I'm in. I'll never be competitive regardless, so I'll just mod my car how I like it and just aim to improve my own time

[M0nk3y]

A lot of the SCCA rules seem unnecessarily restrictive, while others seem to give unfair advantages to other cars. For example, since we have cats in our manifolds, we can't really change our headers. Cars that have cats in their midpipe can. And then to add insult to injury, cars that have a set of secondary cats can delete their primary cats. That rule gimps our cars significantly, while it allows others (E9x M3, Z4M, WRX, Evo, etc...) to potentially get huge gains.

With regards to the oil pump and pan... I think the rationale is that if you don't have to worry about starvation, you can sustain more Gs and therefore potentially improve your laptimes. I think the benefit would be miniscule to a lot of the allowed changes though.

Personally, I just don't care what class I'm in. I'll never be competitive regardless, so I'll just mod my car how I like it and just aim to improve my own time

Exactly. The last paragraph sums it up.

Until the 128i is paid off, then it will become my STX car with track only in its mind. Until then I use the Z4M for fun

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[prowlerflyer]

We have tiptoed around a couple of basic assumptions. Lifter tick and oil starvation are not normal operating conditions, period.

The N52 is a motor designed for street use, and some of us are adapting it for track work. No matter what, real racing motors, unless forced buy rules, do not use wet sumps. An Accusump may be a good alternative.

A dry sump would be optimal, but may not work because of rules or budget. Overfilling a wet sump may work, but there are risks associated. Too much oil can cause foaming or crank drag if the crank contacts the oil in the sump. Both of which can cause engine failure.

Steve

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