tranced

please explain further.

oh yea, and trekky.. don't worry, i'm BUYING hop-ups for the car

fastharry™

iTrader: (4)

Tranced........work on your car and enjoy it....

when springtime comes,we race in Nanuet NY on tues nite's..

Private paking lot,lights,ROAD RAIL system track,and this year we'll have transpnders....

Come out,and you can race..We'll(myself and treky 11) will help you out with that r40...(you can also see how fast TREKY 11 really is......and he's faster than me )

the guys race Serpent,tc3's(me and treky have those also),HPI's,OFNA LD3's(youcan see how bad those cars really are)

adlawoo

Hey Harry! I will be looking forward to that place in Nanuet. But I cannot still remember Trek11 from the NJ Challenge. My R40 is already hibernating...12TRT off the chassis and wheels too and cannot wait for that spring time....later the blizzard is coming so no Sunday Nitro for us here(NYC)....

tranced

Enjoying your FW-05R huh?

The Sleeper

The R40 comes stock with 19 and 23 tooth pulley on the side belt. But the kit also includes a 22 tooth pulley that can be used instead of the 23. Would anyone care to explain the advantages of switching from a 23 tooth to a 22 tooth?

tranced

your overall drive ratio would decrease. Faster acceleration, slightly less top end.

InitialD

That would be overall FRONT drive ratio decrease... Which would mean front overdrive.

I would think faster acceleration and higher top end if you're using a front one way.

InitialD

I would guess that by using 22T pulley would give a little overdrive on the front tires. Some tracks the car will drive better with front overdrive and some drivers would prefer their car set like that.

If you want to use the 22T front side pulley and but do not want the overdrive, you need to run about a 3 mm split between front and rear tires i.e. front 3 mm smaller than rear tires. Many have found on other cars that by running a split, the front and rear tires wear the same rate. Meaning that at the end of a long main, your front and rear tires will still have a split of about 2 or 3 mm. The other advantages are that by running a split, you are able to run smaller front tires to avoid things like traction roll and for better steering and handling due to higher roll center in the front while still able to run big tires in the rear to get the required tire rollout to achieve the needed top speed.

BallPy

Are you sure you dont have it reversed.

InitialD

I don't think the computer would lie. Just check it out at this website.

The Sleeper

I think IntialD has the right idea. It seems that running the 22 tooth side pulley will help the tires wear evenly, that is if you have the correct split. I guess the split needs to be 3 or 4 mm; which I don't know. I wished the manual would have explained the tuning options the R40 has.

Anyhow, people seem to run the front overdrive set-up mostly to get even tire wear. I can see where running the 22 tooth pulley would make the front tires pull harder than the rears. Also I can see where you need a split so that both front and rear tires have the same roll-out. I guess the even wear comes from the fact that now the front tires are working harder and so they are wearing just as fast as the rears.

I wonder,,, does running the 22 tooth side pulley make the front tires wear faster or does the wear on the rear tires slow down? One or the other has to happen in order for the tires to wear out more evenly.

InitialD

Don't really know but the fact is the rear tires rotate and work the same whether you use the 23T or 22T. By deduction, it must therefore mean that the front tires work more and hence more front tire wear.

My guess is that if you run a 3 mm split, the front tire rotates more times than the rear to get same front and rear tire rollout. So rotating more times would subject the front tires to more frequent rub and wear against the surface of the track.

The same front and rear wear rate only works when you run a split. Else, if you run equal front and rear tire diameter and run the 22T, you start with a 3 mm overdrive and probably end up like 6 mm overdrive (i.e. 3 mm difference smaller in the rear in physical measurements) at the end of a long main.

Darkseid

iTrader: (9)

I was wondering the same thing about the extra pulley, and came to the same conclusion as IntialD(mainly by remembering the discussions people had about overdrive with the Losi XXX-S). Thats why I didn't bother to ask about it.

It is good to see the thread return to discussion about stuff pertaining to the actual car!!!

InitialD

Weren't you guys doing just that all this while?

Darkseid

iTrader: (9)

Ummmm..........yeah......thats what we were doing.....