Cribbin

iTrader: (4)

hi paul, million dollar question for you

myself and a friend both have a t3. his car will understeer and then oversteer rather than rotating around the corner, so you need to slide it around. My car will rotate really well around the corner and then fail to straighten up on exit a bit.

my question is what would cause this difference?

we have swapped electronics, shocks, springs, diffs and bodies without any changes to either car. i have also given his car a look over and set it up from scratch (tweak droop ride height camber etc...) and this also made no difference. we are also running our weights in the same place. if you put the two cars next to each other the only difference is the colour of the wires going to the motor, absolutely nothing else. also our suspension moves freely on both cars

any ideas? we're lost

cheers

ben

timmig

iTrader: (25)

I've got one for you---change the chassis!! I know it's a lot of work---but I'll bet you'll find the difference is there!! Just because they look the same--it doesn't mean their from the same run of carbon. Or maybe one of your cars took a big "Hit" and that flexed the chassis to extreme. I'll bet you'll find the difference there/----
sorry--- didn't mean to hijack Paul's thread.
I'm interested in what he thinks this could be coming from too!!!!

Cribbin

iTrader: (4)

thanks for the idea, but ive had 2 chassis on my car and they feel the same. and he has had this problem with an 2 pro 4's an fk05 a 008 and now his t3 lol. so its something he does, but we cant see what we do differently

Yokomo_Ant3

iTrader: (29)

Is his Radio setup the same from all of the cars? Set something different to yours?

B4james

iTrader: (13)

Steering throw is what I found to cause push because the tires were scrubbing out and then sliding, when I dialed out some steering travel and took it back to around 80-90% the car flowed and rolled a lot nicer through the corners, might be worth checking if you haven't allready

dontfeelcold

iTrader: (22)

Radio setups the same. I reckon it has to be with the weight distribution on the chassis, even though we have the electronics in the same spot. It is something not visually obvious.

Johnny Wishbone

iTrader: (6)

Paul, have you ever had the feeling that the short shocks may be just a touch to short on the car. When the car is completely compressed the shock is still within its stroke but when running higher ride height and trying to achieve the same droop setting I find my front shocks seem to short. Do you just unscrew the lower mount or do you ever try running the long shocks?

Thanks

BlackedOutREVO

iTrader: (67)

Cribbin- Two major things that Paul helped me with and I have tried that will help or kill steering is the wing on your body and diff. I usually ran my wing pretty far off my body, and diff more on the tight side and my car always pushed when my buddies car with the same stuff would steer like crazy. Thinner diff fluid (or looser ball diff if you run that), and the wing a few mm's from flush with the bumper and my car steers really well now

Paul L

Hi Guys, I have been out of town for a couple of weeks at races. sorry that im just getting to this stuff now.

In 09 I use futaba 9550 servo and futaba dsm receiver, LRP sxxtc speedo's and trinity pulse mod motors. with the new car i will most likely use a bigger servo, and im testing with the new Thunderpower Motors.

Thanks.

I definately think its very important, the best driver dose not win every time, but the best car dose not iether. lol

Hi. my favorite three things to lock the rear end in are always, Camber (more rear, less front), wheelbase (shorter in the front or longer in the rear) and toe (more rear toe). its pretty obvious but i find them to work the same for every serface, tire etc.

Thanks.

Hi Kieth, Im Glad to hear that everything is going good. tell Jason Good job for me. No problem, let me know if you need anything.
see ya!.

, Thanks for the kind words, im glad that we were able to help you out in some way. hopefully ill see you at a nother on road race soon.

got ya!, thanks.

Wow, the color of the wire is my guess JK,LOL. I assume that you have swapped tires. your post is a testament to how sensitive a car can be to the smallest things. i would focus on how to make each car work better. for low bite i like to run more front weight, this gives the car a more natural traction feel, especially on exit. maybe try shifting some weight forward on the chassis. you could try less caster or just a bit of anti-dive also.
let me know if you figure it out, sorry i couldnt help more.

As good a suggestion as any.

Maybe he wrenches the screws super tight, a car will be stiffer if the deck and chassis screws are tighter. but i wouldnt loose sleep, i would just tune each car a bit different.

I bet that you have the clicker pistons in your shocks, i run the standard pistons and i have never had that problem. if so i would make the switch to 3 hole pistons with 400r 600F to start. hope thats it, Thanks.

Thanks.

mickrcarver

iTrader: (101)

Thanks for thr reply Paul, but what would the purpous of a larger servo be? weight bias?

Slapmaster6000

iTrader: (16)

Paul.....

Why does everyone in the NW have a head cold? It's like the plague around here!

Brian

STLNLST

iTrader: (32)

If I had run mod at the KO.....do you think you would have still won

dontfeelcold

iTrader: (22)

Thanks Paul, It is a difficult thing to diagnose. One thing noticeable on the track is that my car rolls less than Cribbin's. You can see Cribbin's car leaning over more, its easier to drive into corners and holds ALOT more corner speed. Iv'e had a good play with setup including swapping all the parts over between the 2 cars (electronics and body included), and my car still has the same understeer.

The fix so far is for Cribbin to build my car and it works. Although it would be nice to know exactly what aspect of the car is having such a big effect as it would be a really good tuning tool.

Paul L

Yup, obvoiusly you could just run more lead next to a lighter servo also.

yea, im sorry. i think i started something pretty big. nothing like inflicting pain and suffering on several of my friends.

I definately think you would have taken me off my game.

Man I dont know, it could be anything. 1/4th a deg of camber can make that difference for me, slop in the axles and ball cups ????. let me know if you figure it out.
sorry imnot a ton of help.

jammincrtjames

iTrader: (2)

Paul,

Did you start the Hillbilly link? What made you try that?