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I agree with Stephen.

On another note: I have used elastic droop limiters and hard limiters (like the shock) as my droop limiter and have found no difference in performance.

I currently use the shock as my droop limiter and the data that I posted reflects that.

I can't say enough great things about Johns classes. Many of you have seen some of my data plots that I have posted here on the FV forum. Most of what I currently know I have learned from taking John's classes. I think like most people I was using my aim system as a fancy lap timer before I took Joh...

John, not quite sure I understand this statement. when you're up against a droop limiter, you have effectively increased your spring rate to a very high level. The droop limiters are highly nonlinear springs. The spring "rate" never changes, the force that it is resisting will change depen...

I'm more interested in seeing where Scott's post is going to go - it's a good subject. John My post was simply to try to give a real world example to help answer the question originally asked regarding the amount of rear suspension travel and the amount of rear suspension roll. Nothing more, nothin...

So, you are tell me the car goes to about -8 degrees camber at this point and is happy? Where are what should be record amounts of roll at this point on the black graph Not sure if .600 of shock travel is equal to -8 deg. of camber, I meant to create a math channel to calculate that but never got t...

I run -2 deg. total Droop and -4 Deg. total camber, so zero on the potentiometer would be -2 deg. total droop. I use my shock as the droop limiter.

There is no noise on my trace. What you see is what you get.

Brian,

Good Job, see I knew you could do it !

BTW, the down ward spices are suspension compressions.

hardingfv32-1 wrote:Really, I don't see it at all. Can explain where I showed look?

Brian,

You know perfectly well where to look. Lay off the champagne my friend.....

Brian,

Yes it does......... Don't they all?

Roll is measured using the front shock potentiometers.

One other note, my rear suspension is probably a bit stiffer then most since I run my car very low.

Here is a graph representing dynamic FV chassis roll and rear ride height. This car has a zero roll rear suspension design.

The black trace is chassis roll and the red is rear ride height.

[ external image ]

John, I am confused by your post???? Not sure what your point is........

My wheel speed sensor is in the right front wheel. The course, Thunderhill Raceway, is CCW. There could be many reasons for the delta in the speeds including tire flex, tire circumference, air pressure, etc, etc. With that being said I still prefer to use the actual wheel speed for session Vs sessio...

I don't like the GPS speed because it seems to lag when the car is in the corners. However, I will admit that the GPS speed is nice to have as a backup when the wheel speed sensor fails which I have had happen more then once. In the picture below the red line is wheel speed and the black is GPS. htt...

Everything has been SOLD OK, the deal gets even better. See below. Strong national quality Ron Chuck/Jim Lepetich FV motor for sale. Motor has 3 races since complete rebuild. Brand new Ron Chuck heads with latest mods, Ron Chuck manifold, electronic ignition, many new parts. $2,995.00 Complete fron...

Tiago, About the measured spring rate of 83 lb/in combined, is this number different from what you measured or expected? John Based on my experience I think this value of 83lbs of total front wheel rate is pretty close. My M2 had a Ron Chuck front beam with the shortened springs, which are obviousl...

Diamond Formula Cars is proud to announce that our one piece stainless steel lower offset shock mount extensions are now available. These beautiful parts are machined from solid stainless steel stock and come with the spacer and nut. Cost for a pair is $39.95 + $5.95 for shipping within the U.S. Pay...

I think Greg has it just about right. We have had a spec tire program in the SFR region for 20+ years for our regional races. The current tire, American Racer, works excellent and is good right down to the cord. In fact I turned my fastest lap time ever with the cord just starting to show in the fro...

OK, missed that in your calculations.

Sorry,

I'm not an engineer and I may be out of my mind here but I still don't think the front end sees 100% of the decelerating force? Isn't the rear also absorbing some of that force?

I am suspicious of your anti dive number. If the front brakes are doing lets say 60% of the work and the rear is doing 40% wouldn't the anti dive number be 1025 x .6 or 615lbs?

I have raised the beam in my car in relation to the frame so I can run the car as low as possible with the trailing arms being level or slightly higher (front of the trailing arm) then level.

I think some of the math is off a bit on a few of the previous posts. Wheel rates are about 30lbs per side using a full spring pack which would be 60 lbs total for the front end. Anyway, I also run my frame 1.75" above the ground in the front. Occasionally the frame will hit the rub strips in t...

Not to late to jump in on the new advanced class which is starting tomorrow, Monday Oct 17th. If you have already taken the first class you will be amazed by the information presented in the advanced class. I am taking the advanced class for the second time (for free, thanks John :lol: ) and am real...

Diamond Formula Cars is proud to announce that our offset shock mounts are finally finished and available for purchase. The upper mount is CNC machined from billet 6061-T6 aluminum. The lower mount is a one piece design and is machined from 1018 Cold Drawn Steel with a clear zinc coating to prevent ...