AdrianM

iTrader: (4)

Keven, I know this has been asked before but I could not find your response...

What do you feel making the upper arm 2mm longer (2mm spacers between the upper arm mount/reactive caster block and lower arm mount) on a 1/12th car does for the handling?

RCvetran

I can answer that one Adrian as I have just done it to both my cars.On the 1/12th car I improved my lap times by 0.19 of sec .Car held the sweepers better and kept its lines. No sign of push ,certainly smoother. I fitted a brace also to the top arms .Apperently the brace from car r5.1 fits I made my own.

AdrianM

iTrader: (4)

I was curious what Keven had to say as I would imagine it is a mod to smooth out the car in high grip conditions, not all conditions. I wouldn't imagine it would increase steering as it reduces camber gain. However, it also slightly lowers the roll center and that would make the car roll/transfer weight more.

I have my 10R5.1 set up with the 2mm spacers for tomorrow night. My track is Med/High grip and my setup is really good there so if I can drop my lap times I will be stoked!

MattW

Kevin, have you ever tested spacers on the front axle vs spacers against the arm mount?? so keeping the overall front width the same, but effectively altering the wishbone length / king pin position relative to the wheel.

Keven H

Hi Adrian,

Yes I tested that. I think the shorter top arm on lower bit will give you more turn in and more responsive ! the main reason why I changed to that was too make the car smoother to drive on high bite and honestly when I did I did not loose any steering, it just was smoother going in, felt like it carried more speed through the middle of the turn and I could drive the car harder. I tend to like a car that finishes the turn really good but can be driven hard going in so that seemed to be the best for me ! I have not gone back and forth in a while now, I have been running my car like that for almost a year now. Let me know if that is what you find.


when making the car wider at the arm mount, it will stiffen the car up a little and will make the car more responsive harder to drive in a sens. I beleive with the same width, a car wider at the arms will be more edgy than a car wider at the hex only. You have to keep in mind that you change more than just the width when changing the arm mount spacer because you also changed the shock location, the upper link. but in general this is what I have found !

CraigM

iTrader: (34)

Hi Keven,

Back when you ran 17.5 boosted TC, what can timing did you run on the reedy motor?

tx
Craig

Keven H

Hi Craig,

last time I ran 17.5 with boost was at snowbird last february ! I looked at a setup and I ran 30 degree timing with 35/105 for gear and est settings were for software 4.4 and I had 0/10/10/1 ! keep in mind this is on a fairly tight indoor track !

Keven

B00t13g

iTrader: (9)

How do you determine what diff/ shock oil you run and in your opinion what effect does diff fluid have? Thanks man!

MattW

Kevin, oops, I was thinking on 12th scale, but didn't actually mention that!!

AdrianM

iTrader: (4)

At my medium bite small home track the longer upper arm made me more consistent. I didn't feel a big difference but my average lap times improved. This is on a 10R5.1. The car is handling phenomenally well.

It would be cool to see you and the rest of the team run the 10R5.1 against Team CRC, Team SpeedMerchant and Josh and his CEFX at the Snowbirds. Race on Sunday....sell on Monday right!

CraigM

iTrader: (34)

MAXED! Thanks Keven, I'm just trying to get a starting point for a "stock" event - I know it's been ages since you guys played with boost

M.Abramowicz

iTrader: (1)

Hi Kev!

Can you tell me one thing about your mazda speed 6 body?

At front lexan touch bumper or is moved some to front? If moved (free space, how much????)

My is moved to front about 5-6mm so I think it is too much


Thank you!
Abram

Keven H

Hi Michal,

My body is about 3.5mm forward of the bumper when running Mazda speed 6 ! 6mm seems like quite a bit but im sure it can work.

rosko

Im running a low roll center on my a-arms 3a all around with shortest camber link with vertical mounts would lowering my whole link down equally give me less roll or more im thinking less but, not 100% sure this is for front and rear

valk

iTrader: (13)

Question;

Will the 5.2 rear pod bulkheads work with the 5.1 lipo conversion? I ask because i have a 10r5 im vulturing a lot of
Parts to make a second 12th scale from. Just need 12th main chassis and rear hubs but with the 5.1 lipo upper brace id have no crossbrace in the rear. Could i use the newest ones? Ie, did the upper and lower plate holes move?