IndyRC_Racer

iTrader: (9)

I've seen locally a FT TC4 do very well in VTA - ITF or carbon double-deck chassis

I've heard of some racers removing the side standoff/chassis braces to help give the chassis some flex. You could also remove the top deck or put rubber o-rings between the standoffs and top deck to allow some flex.

I'd be interested to hear what type of setup you were using on your FT TC4.

cutjo3

iTrader: (13)

Thanks, I will give that a shot. I don't plan on using the tires again, just the rims....

danketchpel

iTrader: (1)

You have to do some creative dremel work on the chassis where the motor cam fits into, the motor cam itself, and motor clamp to allow it to rotate further away from the spur gear. You also need to dremel out some clearance in two of the chassis webs for the larger pinion. I also needed to dremel just a bit from the lower opening to clear the motor can.

I was able to get it to fit with the 72t spur and 40t pinion figuring that would be the worst case scenario.

IMO, I don't believe any of the dremel work is detrimental to the chassis or motor mounts if you are careful.

Good tip, I missed that one when I perused Robinson's site.

lp3233

iTrader: (47)

I guess I acted too fast. I ordered a 41 pionion at my LHS. Maybe I will go for the 60 spur next.

speedsterblade

I wasn't going to use the FTtc4 chassis car but may have to if my dremeling don't work...Like Danketch stated the motor cam needs some dremeling on the std TC4 chassis so the motor can move further from the spur. Need to trim some of the 'webbing' out, not much. Without trimming the motormount or cam down a 88/52pin combo won't fit. ..a 49 pin would fit but fdr won't be want I want for the 21.5.

If it still don't work I'll run the FT chassis w/o braces and/or remove the top deck completely.

I'll post my findings...

liljohn1064

iTrader: (17)

Try an 84 tooth spur from PRS with one of their 48 tooth pinions. They work perfectly and get the gap between pinion and spur right in the ballpark.

speedsterblade

May have to... too bad cause I got plenty of 88t spurs sittin in the tool box. Going to try mod'n the motor cam/mount first.

TeamGoodwrench

iTrader: (4)

How much weight do you guys typically need to add to balance the TC3 ??

I put 2 mini scales under the chassis (wheels off) with no battery in the car (21.5 Novak motor). The motor side is about 4 oz. heavier than the empty battery side. My LiPo pack is around 8 oz. (I think?) -- so when I put that in I'm going to have to add like 4 oz. of lead to the motor side ?? Is that typical ?

Thanks.

liljohn1064

iTrader: (17)

I'd take it into the shop and use Blain's gravity balancing pins. That's what I'm going to try tonight on my TC3 to get it that much closer. Jim had found in the TC3 he was torturing everyone with that it didn't require much balance wise. I'll be there around 5 tonight even though its truck night.

John

TeamGoodwrench

iTrader: (4)

OK... cool. I'll swing by the shop on my way home from work, but probably won't be there until around 6 pm.

Hmmm... gravity balancing pins ? Do they run on dylithium crystals ??

liljohn1064

iTrader: (17)

Only on the Enterprise.

danketchpel

iTrader: (1)

Here's some pix of the dremel work I did.

danketchpel

iTrader: (1)

A question for those running the Novak Havoc ESC, what seems to work better for the throttle profile, linear or exponential?

liljohn1064

iTrader: (17)

NICE work Dan. Does the additional cam work give you more motor rotation on the cam itself?

reenmachine

iTrader: (26)

I just received my Havoc system and haven't set it up yet, but I have other speedos with throttle profile options. I tend to prefer linear and to let my trigger finger have direct control. I think it's a matter of personal taste and style though.