Pyramid

I think can be done, it is very logical to have less steering for front to aviod traction roll. Only now UBO/LT for rear is not an option anymore (in JITC) since it will generate way to much rear traction that will make the rear kind of `hard` to follow the front. In case not yet mentioned, JITC track has been resurfaced. Great traction.

Pyramid

Faster compare to when not using the drag brake? yes, I believe so. The only problem is I never keep track on how much faster. Anyway, you should be find on at least 6 hours using drake brake as I have tested before (then I sold the car but everything is still working perfectly including the brake pads). Sure you would have to adjust it tighther in between couple hours to have the same feeling.

Pyramid

To me traction roll is a very good sign. It would means this particular car has more than enough traction compared to those that did not flip. My first priority would be lowering ride height to avoid traction roll (which is very effective); thus will still give me that tremendous tracktion that other cars dying to have! Next step would have been too easy parts to do.. get rid off those extra traction you do not need. Higher roll center as mentioned by miester D is one way to go, cutting inside front tires 2mm by, I believe, Art C is also the other way to go. Anyway, it is easier task then if I were needing to make more tracktion.

cyba888

I understand how it works, im just wondering if it will hold and not wear out in a 30 minute race.

GoldFinger

Yes, another valuable alternative.
But like Marcos mentioned, lower shore like 35,37 is a must to encounter less steering.

InitialD

Guys, I need your precious feedbacks !

Problem 1

I have a 3PK with HRS receiver. Futaba S9451 steering and KO 2144 throttle / brake servos. Symptom is when I get to about 50 feet from my Tx and car, the car looses signal and the throtte servo goes into fail safe mode.

Problem 2

When I swap my HRS receiver to the PCM one, I was able to control the servos like normal after switching from HRS to PCM mode on the Tx.

But if I go like 150 feet away, I find that especially the throttle input is pretty slow. I could notice this from the sound of the engine revs of the engine I get compared to the throttle input I give it. Sometimes, the throttle input seems like it's stuck to partially open and takes some time to get back to neutral position.

Summary

I don't know if the two problems above are related and that would mean either my servo or my Tx module is toast. My suspect with the first one is the antenna wire of the Rx wire is probably broken halfway. As to the second problem, I suspect that my KO throttle servo is a little off !

Any inputs to this is much appreciated.

InitialD

I was actually trying to point out that the drag brake thingy would not be any different if you actually do it manually via precise throttle input (if you could) !

So using drag brakes to stop the car or using brakes like you normally would do to stop the car using a oneway front (if you could do it precisely) would wear the brake pads the same. Just that the drag brake method stops the car in a more automated way and more precisely.

maverick

just a thought, have you checked your rx batts?

GoldFinger

Try different memory banking.
There is some unit problem here is cure by that methode.

cyba888

I would swap receivers with a friend first to see what the problem is and from there it would be much easier to know if the receiver is bad. For the servo do the same thing and swap with another one.

Pyramid

Sell it and buy the newer one, Black TI, in case you have not use it Seriously, the newer batch has better moulding/production process. Not much sink marks. You would then back racing in the forum faster

markp27

I would say that the two problems are related. It sounds like either a weak signal (or poor reception) or you're getting noise into the system (some how the power isn't clean between the battery pack and the rx unit, or even another element induces noise, i.e. servo?). As you suggest, could be the TX unit too.

With your HRS system, the signal becomes too weak (too noisy?) therefore the system goes into fail safe. With the PCM, the encoded signal can be decoded to a better level than the HRS, but eventually the error rate becomes high and therefore your servo response time becomes longer.

Each element being quite expensive, it isn't so simple to swap those parts for new ones - the only suggestion to make is try borrow pieces from a young friend

Hope this helps somewhat?

markp27

Hmm, that sounds like a dealer talking

InitialD

Thanks for the reply. Yes, I did. I changed to different ones. Still the same. If the battery was low, the fail safe on the 3PK would kick in.

InitialD

Cool. Thanks for the tip. I forgot about that one. Will try it out before trying out the other suggestions.

p/s: You all would have guessed that I'm kinda lazy taking out and testing radio components one by one.