Search:

I don't doubt your abilities to successfully tune/prepare a race car. I'm not arguing to change your mind, or disputing your knowledge.

I'm arguing your explanation for the benefit of those...

Yes there is. ;)

If the leg is horizontal there's no difference.

If the leg is angled downwards (in my context I'm referring to the beam being higher than link pin) the wheelbase decreases in...

Couldn't agree with you more. I loved when my competitors were concentrating their time, effort and money on things I didn't feel were as important as whatever I was focusing on. ;)

As you know there are compromises with every design. Trading one benefit to the detriment of another. More than one way to skin a cat.

The best way I can visualize it is when hitting a curb with...

Maybe you still wouldn't have got excited about it, but I bet that if you raced at a track that had a series of esses at the beginning of one straight and a chicane in the middle of another your...

I had different beam mounts fabricated and put a ride height adjuster in my beam. I ran the front end as low as I could without bottoming and still had the turkey legs angled so that the wheel is...

It's been many years, but I couldn't have been happier with the service I received from Mr. Brenner.

I love simple, effective and easy to tune/adjust! ^^^^^^ :thumbsup:

Shock absorbers with 18metric crap-tons of rebound dampening work. I was extremely happy with my Performance Engineered Products pair. Not a name that will come up in many road-racing circles, but...

Yes. A few aftermarket choices exist. Like this: https://vwparts.aircooled.net/Caster-Right-Shim-Kit-Caster-Shims-Pair-p/caster-shim-kit.htm

I was more concerned about what happens when you hit a curb. When the turkey leg is horizontal and you encounter a bump the rotation of the turkey leg is forcing the tire forward into the face of...

My goal was to run the front as low as I could on my FV without bottoming. Smoother tracks I could run lower.

As to rake, the rear ride height is dictated by desired camber in rear.

If your...

Irony. ;)

Are political attacks/statements now acceptable on ApexSpeed or only the ones with which the mods agree?

Easy, relegate the class to Regional status. Not a fan of making rules I don't intend to enforce.

Or, unless the goal of the BOD is to ensure that FA does NOT collapse and disappear...

"Take over" in the sense that they are 75%-90% of the grid? Sure. "Take over" as in winning the big one? Not as long as people in traditional FA cars find the big one important.

Agreed. The contract was in exchange for your money they were providing you membership in their club. They honored that.



Agreed again. Their practices were screwed up. Just don't...

I hate the fact that our society is so litigious.

I also hate seeing people getting screwed.

That being said, if I were "judge and/or jury" I would have two major issues:

(1) your...

Because it's not a zero roll car? ;)

They want to be able to easily tune the roll resistance at the rear to some number greater than zero.
Perhaps the size bar they wanted to run in the front...

If the tracks gave the organization credit towards another event rather than a refund, why do we expect to get anything other than a credit from the organization?

If they don't have the same event...

Doesn't everybody seem tall to you? ;)

Now all the F1000 group needs to do is get an active F1000 racer on the BoD and the CRB. ;)

Yes.

However these packages are pretty developed from the factory so there's not a ton of meat left on the bone. There's about a 10% bump in CR available, exhaust improvements, more aggressive...

The solution is not a one size fits all engine model restrictor any more than it would be a one rpm limit for all engine models, unless the group is okay with it becoming a de facto one engine model...

Yes, much more so.

An otherwise stock 13B with just a good header makes more HP than the current FM.

It's a matter of desired longevity (isn't it always?).

Go up beyond 8500 rpm and you have...

I'd argue the SCCA needs customers, they just don't care who they are. SM and SRF go away and there will be other classes to fill the void. 250 classes with 1 car each still keeps the lights on....

I didn't really pay much attention to S2000 cars except for following a friend in the ACRL. How do the current S2000 fields at various premium vintage races compare to the S2000 cars in SCCA back...

What it boils down to, IMO, is that FA owners aren't going to permit their cars to be devalued to the point that a FB car can compete with them for 1/2 the price.

A "FB" car can compete with a...

Don't have one any longer. Raced my FV at Willow Springs, Buttonwillow, Las Vegas, Pahrump, Cal Speedway. Had poles and multiple wins at every track but Cal Speedway.

There's a 3% difference in...

If you have the 1.26 use it. The difference in negligible almost all the time, and you'll have better 3rd gear acceleration.

Okay, if you insist. I didn't say they remained the same. I said "I don't know, but I suspect they would not. Largely because there is some "physicsy" stuff going on and some resistance to roll....

Agreed. :thumbsup:

More mechanical grip is found with softer wheel rates, until your rates are so soft that they allow too much travel making geometry/alignment go places we don't want it to go,...

Perhaps (I don't know) it's because the roll center height and CG height of a FV move very close to in-unison. While in a double A-arm type rear suspension the RC height doesn't necessarily change...

Yes, when you are on the limiter all things regarding weight transfer at the rear of a zero-roll car change.

As to hitting a bump with one wheel (on a mono-shock zero roll design) the rear...

:thumbsup:



I don't know, but I suspect they would not. Largely because there is some "physicsy" stuff going on and some resistance to roll. That resistance to roll, no matter how little as...

Common sense, logic and experience will get/has been very good for you.

At the risk of this turning into another falling arrow thread, I'm going to toss out another over...

Rise dramatically is subjective. If the price of your favorite chocolate ice cream (I can't remember what this month's flavor is ;)) goes from $2.50/pint to $3.75/pint that's a dramatic rise (50%)...

Agreed.



I would agree that less flex the better. But we don't need 1 degree per 5000ft/lbs of twist in the rear of a zero-roll FV. We certainly may in a P1/P2 car.

However, Brian's...

When is a zero-roll car not a zero-roll car? ;)

You put a anti-roll bar on it, and I argue it's not a zero roll car and rear chassis stiffness requirements rise dramatically.

Did you read SAE 2000-01-3554?


A bit too complex for me to easily digest, perhaps you'll find it helpful.

If you can handle the extra 20-40# of tubing, I believe it would be better to use it for driver side impact protection and/or chassis rigidity from main hoop forward.



Absolutely, and as long...

Last statement on this subject from me towards Brian, as I simply don't have it in me (any teachers out there) to find other ways to explain things other how I already have.

Weight transfer isn't...

Yep. Yet you still remain hung up on lateral weight transfer.

A wider track would lower the RC w/o changing ride height. I narrower track would raise the RC w/o changing ride height.

I'm not sure if there are more than 1 or 2 tracks in the USA where not...

Maybe reach out to Sander Engineering in Torrance, CA and see what they can do. They make spun aluminum wheels in 13" for Midgets.

Exactly.




It does. The weight is transferred diagonally.



That's the direction I've been trying to nudge you the entire debate and the main reason the requirements of a zero-roll FV...

If we were racing on glass smooth tracks then you would have a valid point, we aren't.

You have calculated lateral load transfers of 150# range.

Take a FF car with a wheel rate of 250# and a...

Brian,

You are hung up on lateral load transfer and therefore ignoring much larger forces at play.

Yes, what's the approximate magnitude of those lateral forces? Now take a FC/FX/FA chassis with 700#/in wheel rate hitting a curb, what are those forces? What happens when a zero-roll FV hits a...

I understand that. I didn't say lateral loads. I said loads, and am speaking as to why the chassis (in the rear) does not need to be as torsionally rigid in a zero-roll FV than other conventional...