Suspensionless car?

Metro?

7.125/1 rear diff

MrJoshua wrote: 7.125/1 rear diff

Dooooooood

, 13 speed gearbox?

Citicar?

I'd just massively up the spring rate and go from there then. Karts have a lot of flex engineered into them so they work without suspension, or diffs. Also, lots of camber via blue wrench.

the quickest accelerating piston driven cars in the world don't have suspensions...

Driven5 wrote: Citicar?

We have a winner! 1200lbs of Aluminum and Plastic Fury powered by lead and acid and the best 3.5hp GE can make!

leave it factory stock....it is guaranteed to win "Most Spectacular Failure"

I'm going to try to get more than 50hp out of that poor little motor, so failure is definitely an option.

good candidates for LS swaps...

Now this I can't wait to see at the Challenge...

Are you retaining the ev drive train? If so, what control system is it using, and what voltage?

Excellent! I'm guessing you plan to up the voltage? Didn't those have a floppy aluminum ladder frame? If so, I'm sure it would flex enough for solid suspension.

Did you consider a bike engine for it or is it suppose to stay eco?

'busa swap tiem?

+1 for running bump stops. Don't even try totally solid suspension, that will just break stuff. If you had more money you could go with the F1-style setup of running traditional coilovers that are just really, really, REALLY freaking hard.

BTW the ground effect F1 cars weren't violent when they lost control because the suspension was ultra-hard, it was because when they'd slide or go over a bump they'd lose downforce and suddenly lose most of their grip at speeds that were only doable with that grip.

I do plan to keep it ev and up the voltage. I'm currently (ha) trying to decide what method I want to use to control that higher voltage. The plan I favor the most is about as crude as using no suspension.

MrJoshua wrote: I do plan to keep it ev and up the voltage. I'm currently (ha) trying to decide what method I want to use to control that higher voltage. The plan I favor the most is about as crude as using no suspension.

You're building a throttle that is an on/off switch, aren't you?

How do F500 cars limit droop? It should be pretty easy to make some sort of rubber puck out of bumpstops to work as the spring. That's all fine and dandy under compression. I think the technical problem is limiting droop on the up side of the car. Massive sway bars?

What motor control system is it using?

I had a car with leaf spring suspension, only three. Front was crossways for independent suspension. Had about 50 HP.

mazdeuce wrote: How do F500 cars limit droop? It should be pretty easy to make some sort of rubber puck out of bumpstops to work as the spring. That's all fine and dandy under compression. I think the technical problem is limiting droop on the up side of the car. Massive sway bars?

Dunno about F500 cars but there are limiting straps you can buy...or you can make them from old seatbelts.

HappyAndy wrote: What motor control system is it using?

It has a contactor controller at the moment controlling two banks of 24v each. First step is two banks in parallel with a resistor in series for 24 Volts and limited amps. Second step takes the resistor out of the loop for 24 Volts with no current limit. Step 3 switches the battery banks to a series setup for 48 Volts. Reverse is also taken care of by contactors. Acceleration is said to be decent from about 0-20mph and the continue at a leisurely pace up to a 40-45mph top speed.

My old Honda S600 had no rear suspension. The front was so stiff it didn't move. I never drove it but someone did back in the day.

Wait, so there's more than ONE Citicar coming? Pretty sure Karl has one of those too.

CASC used to have a small displacement formula car class that used motorcycle engines and chassis with no suspension except chassis flex. Went like stink but avoid the bumps on the track!

mndsm wrote: Wait, so there's more than ONE Citicar coming? Pretty sure Karl has one of those too.

These were Karl's.