rush evo dude

any answers???

kewdawg

iTrader: (3)

You might consider practicing with 6 cells. You'll be faster when you go to 4 cells.

mangoman

iTrader: (11)

Heya rays_tt i usually run really big rollouts in the order of 44-48 or something. With a 69 Spur i use about 38-41 tooth pinion

If you are using the HPI 64 pitch spur gears which i suggest you dont (they strip and get damaged easily, and the HPI parts pretty much wont give you top speed) then you need to go the smallest spur i think its a 94 and largest pinions.... i think 48-50

Note that i run a heatsink/fan on my motor and also clear out as much room around the motor as possible to try and get good airflow/cooling.

mangoman

iTrader: (11)

Oh BTW my starting preference is around 39 pinion/69 spur

Nicadrauspro4

Check out www.gearchart.com for reference on your Pro4's ratio. Just type what motor your using there and the results will tell you what gearing suites your car.

mangoman

iTrader: (11)

Is there's an option to enter your motor type on gearchart now???

Artificial-I

iTrader: (17)

I think you need to know its rpm.

Nicadrauspro4

Find out or know the RPM of your motor then type it on gearchart. To find out about your motor's RPM, use a motor run-in or Motormaster from Muchmore.

SlamMan

What's the biggest 64 pitch spur gear I can get into the Pro4?

I just found out the hard way that not every gear will fit. I bought a 111 tooth 64 pitch spur and a couple pinion gears to get my final drive between 6 and 7.5 and the spur gear is contacting the chassis.

Am I missing something here?

GreaseMonkey

iTrader: (4)

Had my first evening out with the car tonight. Just gettign used to it and learning (Thanks MATTS if you read this) and as it would, a front lower control arm got broken (funnily enough not by me). I was told to get a softer compound arm as it stands up to accidents better but the steering can be less responsive. Does HPI make the arms in softer compounds or am I stuck buying the stock ones (73506)?

bxpitbull

iTrader: (6)

Well, if you are looking for balls out speed and you are running the GTB/4.5 combo, go 64 pitch 98/24. This will give a 9.9 final drive and the car is a friggin rocket. Motor stays cool (140 ish) and depending on your cells, I am getting 10 minutes on IB 3800's.

Now my question...I am tearing up cvd's left and right. My car is totally uncontrollable (running a spool in the rear, one way in front) with the 4.5 on asphalt. The springs are neo yellow (stiff) and whenever I go into a turn, it's like drift city. Which tires are the best to go with this high speed set-up? I am running the Hara Pro 4 and while it is a rocket, this uncontrollable-ness in turns is really a downer.

XrayFK

iTrader: (1)

Spool in the rear!? Dude, get a ball diff in the rear, probably in the front as well unless you are good at driving a one-way.

XrayFK

iTrader: (1)

HPI does make a set of arms for the Pro4 that are a different compound, but I don't think they are available in the US.

mangoman

iTrader: (11)

Hmmm mustve been a pretty big hit to break a front arm in 4 cell stock

Are these the ones you are talking about????
http://www.rcmart.com/catalog/produc...ducts_id=11528

Ive got some but have never tried them, they are NOT meant to be good for carpet as they are designed to give higher traction

mangoman

iTrader: (11)

Actually i take that back they are good for carpet

HPI's High Traction Suspension is made from softer material plastic compound than the standard graphite-plastic suspension arms, these arms are ideal for use on high-traction track surfaces such as high grip smooth tarmac and carpet.