Evo 2 handling probs??

[redlinezak]

I hope this isnt as stupid as it sounds but i have an evo foc with ally hubs and block all round and i also a raycer with ally hubs but plastic blocks. The raycer wasnt built by me i bought it second hand but the evo was. My problem is i want to use the evo as my main car and the raycer as a spare but the i cannot get the evo handle remotely similar to the raycer. I know they are very different but the raycer is such an easy car to drive and the evo although ultimately quicker is a lot harder and hence i am not as consistent with it. The set ups are the same on both cars (i race indoors on a large very open flowing carpet track) They use the same foam tyres etc. The only difference is the shocks? The evo uses ally ones with adjustable pistons and the raycer plastic with non adjustable and a 1.2mm hole i believe ( ihavnt rebuilt them since having it. Anyone got any suggestions what i can do to make the evo more raycerish without losing the responsiveness and outright speed (apart from the obvious chassis differences) I was wondering if the ultra flexi top deck would make it slightly more forgiving?

Thanks in advance

Nathan

[Olly]

Nathan you don't mention what the handling differences are. Oversteer, understeer, instability etc...

The EVO-2 should end up being faster but it is nowhere near as forgiving with a less than optimal setup as the Raycer is. However in order to set it up correctly you first need to analyse and identify it's characteristics quite carefully....

Start off with the standard setup as detailed in the instruction manual, then try to ascertain where the problems are. These can then be compensated for...

Graham

[damo]

listen to graham for he is the set up king!!! made about 4 laps a race difference to my pro 3 when he set it up and i can actually drive it quickish now!!

[redlinezak]

sorry i totally forgot to list them ??? ??? the rayce is very predictable and smooth with no noticable under or over steer just very neutral and altogether nicer. The evo as i said is quicker but takes a lot more effort and harder to be consistent it has oversteer entering a corner and understeer out of a corner. You can compensate for this but as i say it makes driving it harder. The set up is very similar to standers save for the rear roll center bridge and spring colour? Evo front 28 rear 22.5 raycer front 20 rear 17.5 camber f 1 r 1.5 both cars fr toe in 0 deg both cars rear toe 2 degree evo 3 degree raycer ( actually only just noticed that) please ask me if theres anything more that you need. My main query was is there really THAT much difference between the two cars in handling characteristics if they are set up the same?

Thanks again

[Matt Brewerton]

There are two big differences between the cars. The first being the materials. The raycer is plastic and so has more flex which makes it easier to drive, less response and more consistent. The evo has a much stiffer chassis and so is less forgiving. The flexable top deck would be a big help to make the evo easier to drive. Another difference is the weight distribution. The evo has the cells slightly further back. Personally if you prefer the raycer handling then I would get another plastic raycer chassis and use that on your evo until you feel you are ready for the full carbon, which will ultimatley be fastest.
Matt

[redlinezak]

thanks matt thats kinda what i figured just thought i would check as i say i am quicker with the evo just wondering if it could be morwe consistent without losing the speed i may well give the top deck a try tho

[Olly]

The springs on your EVO are somewhat harder than the 17.5's which come standard. Have you also upped the oil weight in your shocks or changed the damping settings accordingly. Oversteer into a corner coupled with understeer coming out is sometimes indicative of an underdamped system. Is the response fairly neutral through the corner ?

Graham

[university_dave]

sorry i totally forgot to list them ??? ??? the rayce is very predictable and smooth with no noticable under or over steer just very neutral and altogether nicer. The evo as i said is quicker but takes a lot more effort and harder to be consistent it has oversteer entering a corner and understeer out of a corner. You can compensate for this but as i say it makes driving it harder. The set up is very similar to standers save for the rear roll center bridge and spring colour? Evo front 28 rear 22.5 raycer front 20 rear 17.5 camber f 1 r 1.5 both cars fr toe in 0 deg both cars rear toe 2 degree evo 3 degree raycer ( actually only just noticed that) please ask me if theres anything more that you need. My main query was is there really THAT much difference between the two cars in handling characteristics if they are set up the same?

Thanks again


Well the first thing to do is get the setups EXACTLY the same on the chassis.

Then you want to try the EVO2 shocks on the Raycer and vice versa. With the shocks, I'd be tempted to go rather harder on the springs than you are currently running; Purple (33) on the front and violet (28) on the rear with 40wt oil and 3 holes open all round. Tomorrow I'm going to try stiffening the car even more, 2 holes all round. I've absolutely nailed my Raycer to the ground on carpet, so I can let you have a look at my setup if you PM me your e-mail address.

[steven252]

The evo as i said is quicker but takes a lot more effort and harder to be consistent it has oversteer entering a corner and understeer out of a corner.

maybe you have too little caster on the evo. too little caster will cause it to have more steering of power into a corner and less on power steering coming out of the corner, (which u are having?) and with having less caster, you have less straight line stability,
i would make sure the caster setting is the same on both the evo and racer?

steven

[redlinezak]

Thanks for all the help guys. The response through the corner is fairly neutral except for the on power pushing wide. I did think about changing shocks over so may give that a try. Caster is the same on both cars. My email address i think is on my profile so the set up would be great although its mainly the evo that is having the probs but all help gratefully accepted.

[redlinezak]

ok quick update. Despite my best (for best read lame) efforts the evo 2 set up was way out from what i thought. :-[ :-[ :-[ Somehow i had managed to match one front shock (4 holes open) with 1 rear shock (2 holes open) on both the front and rear axles (probably not going to help) also the rear droop had been left unadjusted from when i changed the roll center on the bottom wishbones so i had maximum droop (the droop screws wernt actually touching the chassis) I have now sorted this out and given the car a total check thru and all set up correctly so will try it friday and hope that my thumbs can have an easier time of things. Once again thanks for the help guys will lwt you lot know the improvements (there had better be some) ;D ;) ???

[Dave Treacy]

Based on the diagnosis you have just given, if there is no improvement, take up fishing!

[university_dave]

the rear droop had been left unadjusted from when i changed the roll center on the bottom wishbones so i had maximum droop (the droop screws wernt actually touching the chassis)

I haven't actually fitted the droop screws to my Raycer, it seems to like having maximum front and rear doop.

[redlinezak]

could never get on with fishing either ;D ;D maybe sewing's my forte

[damo]

baking maybe?
or stamp collecting...

maybe bell ringing cant muck that up really...lol

;D