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The common thing I find when researching this, is running oil temps below 180F decreases engine life. But there's nothing magical about 180F. If warmer is better, why not 190F? Why not 220F? Below 180F is too cold, okay, what's too hot? It seems like these old tests didn't look past 180F...

I'm surprised I couldn't find info on this in the archives, it's an ongoing debate over engine performance and oil & coolant operating temps. Can any of you in the automotive industry clarify some of these questions? The old wives claims are: Cooler is always better for horsepower Engines are...

I like the mentioned idea of putting some silicone grease, or whatever goop will stay there at those temps and not interfere with piston movement. One problem with grease is as well as it may block dust from entering, it keeps much more dust there to begin with.

I have an excel spreadsheet from school where we put in coastdown data to predict a Cd. It was hardly straightforward to get from real data to a useful Cd. I did make a sheet to predict acceleration, aero limited topspeed, from a dyno curve. It was surprisingly accurate, but I'm struggling on...

I'm gonna head down there this weekend. They have a ton of books on it, not SAE stuff apparently. The SAE publications are $12 or so per paper, but you don't really know what you're getting I wish they had a better summary than just the title.

My Wilwood 6-piston brakes have no dust seals. There really is no room for them. Not ideal for street use. I guess wilwood is saying the stainless can withstand the abrasiveness of fine brake dust better than soft aluminum. Aluminum pistons are a terrible idea anyhow. They conduct heat to...

I'm looking for info (hopefully not all proprietary) involving effect of bias changes from brake "upgrades" and particularly on ABS-1 cars. I've done my share of bias calculations, line pressure, piston & rotor sizing, stopping distances, etc, but I'm new to ABS, so I'll start with a basic...

Which mfg claims they "accelerate the outer rear wheel during cornering for improved handling"? The outer wheels on my Ford pickup accelerate when cornering too, lol. What is Audi(?) doing differently, braking the inner one?

Yeah, ackerman steering must be assumed... and no weight transfer front to rear, to cause differences in backing vs. forward. Would be negligible anyways. I don't think castor matters either.. that would basically accounted for when checking the toe angle at full lock.

For the sake of similitude and dimensionless modeling, isn't water sometimes used to simulate aerodynamics? I'm rusty on this, but it basically consists of matching up reynolds numbers right?

I think the last thing you want to be doing at high speeds is forcing more air to the wheel wells. This will build pressure under the car causing lift and drag. It'll also render your brake cooling ducts useless. The idea is to promote flow in one direction, force it in with front ducts, and...

It is for safety, and has nothing to do with brake proportioning. Head over to howstuffworks, their diagram will show you better than I can. On a traditional front/rear mc, disconnect one brake line, you're pedal will move freely about halfway before it starts building pressure on the good...