Hat's off to you who can control more than 2.4hp!

[olds97_lss]

Man guys, I just can't handle as much power in these as some of you. I know EL P is cranking some serious hp as well as those guys with the dual 21 setups.

I have a 21 maxx with 72/21 gearing with a 21 that puts out around 2.4hp according to info I found but can't re-find. (Anyone know the specs for the Omega 21 Comp?) I can't control it off the line, I can't control it WOT, pretty much, I just can't control it.

So, like I said, hats off to you who can harness the power for fun or racing. Right now, mine is just being aggrivating. A $1500 maxx that I'm afraid to drive due to completely wiping out $100 every single trip to the park...

Guess I'll just stick to my .18 maxx... :depress: :moped:

 

[scottm]

What kind of tires are you running? Tires and setup of toe and camber make a big difference in stability and control.

 

[El Pirata]

Ya know when M&M drove my K-3 he said any desire he had to get a more powerful engine than the 21 in his storm was gone. Sky drove the Anti-Christ and said it was uncontrolable. While controlling them is something I am taking a crash course in they are very unforgiving. Had I known then what I do now I would have gotten such a powerful engine and bought a 21, maybe the kanai 21.

When they finally die, I will probably buy a conventional 21 for a replacement.

 

[Digital Liquid]

LOL...so I guess there is a fine line where your power-to-weight ratio can be too big. Olds or EP, do either of you know how much your truck/buggy weighs? I am curious.

Later...:mex:

 

[olds97_lss]

Originally posted by scottm
What kind of tires are you running? Tires and setup of toe and camber make a big difference in stability and control.

Imex J-Hawg (medium). Toe ? It's a maxx, who knows? Front tires are pointing toward one another about 1degree I guess, rear are straight forward. Camber.... not real sure what camber is.

I'm running 4 supermaxx shocks with UE black on the rear and UE navy blue on the front. 55 weight shock oil.

I'm using hitec 645mg for steering and hitec 625 for throttle/brake. Also, I'm using the POS traxxas radio. I also run a 6v 2000mah pack.

Maybe I should look into a radio that I can slow movement down exponentially (not sure what the short term is) and get one that has throttle end point adjustment to be able to set it to maybe 3/4 throttle.

I do know I drove better when I had the OS 21 RG and the JR xr2 radio. The OS blew up and the JR went with a trade of my stadium truck for my little maxx. Now I'm pretty much stuck with what I got since $ is an issue... I'll just drive the crap out of my little maxx with the orion wasp 18 and 2wd. I would have driven it more today, but I got my throttle servo wet. Stupid puddle!

I think mine weighs 13-14lbs. It's pretty heavy. I weighed it on a person scale so I would venture to guess that I'm not real sure give or take a lb or two.

 

[El Pirata]

Originally posted by Digital Liquid
LOL...so I guess there is a fine line where your power-to-weight ratio can be too big. Olds or EP, do either of you know how much your truck/buggy weighs? I am curious.

Later...:mex:

Heavy enough to break bones if hit at high speed.

I don't own a scale so I have no idea of a numerical weight.

 

[Lessen]

I would definately invest in a good radio system if you can afford it. With all the technology availible these days I can't imagine any reason that one couldn't control ANY vehicle with ANY power/weight ratio.. if it's within ones budget. But as far as the truck itself. For WOT stability straight line stability, maybe try to toe IN the rear tires a little bit... test... tweak... test again... till it seems better but still turns within reason. As far as launching off the line... well, your either gonna have to get a real sensitive trigger finger or get a radio system with traction control. (amazing what video games can teach you these days eh?). I look forward (I REALLY do mean that) to the same tuning pains sometime in the future when I get my DrifTMaxx finished..... twin outlaws 5.4 hp

oh.. and camber is the amound of angle a wheel has left or right relative to the ground.

for the left wheels looking forward...

|| 0 camber
\\ negative camber
// positive camber

 

[olds97_lss]

Is that looking down on the truck or facing the truck?

If your looking down from above the truck, the front tires look a little like this: / \

If your facing the truck the tires relative to top and bottom look like this: | | all around.

 

[Hypedonrc]

My buggy has a VZB on it, and I run 20% because I drove one with 30% in a K2 and it was too fast for my skills. The K2's steering servo was .17sec @ 60 deg. and mine is .22. Man what a differance. I think this played a big part in my inability to control the thing. Anyway, maybe a lesser nitro content would make you happy until you get more practice? $.02

 

[Lessen]

I guess my examples are a little weird.. assume that || is one tire, each mark being the left or right side of the tire. Refer up to my last post and keep in mind the view... Looking at the left side tires from behind the truck.
In response to the second line of your post, you have the front tires toed in... that's not necesarilly bad, but I would do that a little bit at a time to the rear tires as well
in response to the the last line of your post it looks like you have 0 camber all around.. but 1 or 2 degree of camber isn't extremely noticeable unless you physically measure it. Try a little bit of positive camber in the back.. that might help a little but I would be more concerned about your rear toe... just my 2cents

 

[Digital Liquid]

Olds, getting a radio to help control your engine is an excellent idea. You can set it up so that the carb will only open a certain amount and then you can gradually increase it as your confidence level builds to WOT. For example, simply run @ 50% open for a while, then bump up to 75% open, then WOT.

You can also set it up so that if you have a heavy finger & constantly pull the trigger real fast, the radio can compensate and actually slow the down the speed that the carb is opened. This will help you if your truck is uncontrollable off the line.

I think it is the BWTG. You need to make your truck acomodate to your driving style and not you accomodate to your truck.

Later...

 

[Rolex]

Originally posted by olds97_lss
Is that looking down on the truck or facing the truck?

If your looking down from above the truck, the front tires look a little like this: / \

If your facing the truck the tires relative to top and bottom look like this: | | all around.

I think you have the setup for your toe-in reversed. I believe the front tires should be parallel, and the rear toed in. Not the camber, the toe in.
I just added the JR XS3i a couple of weeks ago, and setting exponential in the steering is great. Also, no servo strain when you set the end point of the servo in both directions. Without removing the body or picking up a tool, you can adjust the brakes.

 

[robriguez]

EL P If you are tired of the engine in the anti christ I'll be happy to buy it off ya. Or trade ya for a Picco .26

 

[lykan]

I have been running with only one set of back shocks until I could get something setup...Well.. Lst night My boy took off the shocks from our X-Cellerator (nice shocks btw)

I stuck some red T-maxx springs on the shocks and away I went.. Into the phone pole..the shrubs, on it's lid, I even endo'ed it once.

How stiff are your shocks? If you are going to run at speed, and not jump a whole lot loosen those things up. I found last night, that stiff springs make the truck waaay to loose for me. Uncontrollable to say the least. I would hit the brakes, and it would just bobble and the ass would come out front..

Gluck, and don't give up a .21 is too much to leave on the shelf!

BTW got any pics of your .21? if so was it a drop in?

 

[olds97_lss]

Not any recent pics, but no, not a drop in by any means... took a lot of work to get this thing where it is today.

 

[lykan]

Had to do the conversion for the .21? I'm just wondering about what it took to get the .21 in. I kow you have TONS of work/parts in your maxx.. heh

 

[scottm]

Olds, check this page from the buggy section. It has great info about setups.

https://www.rcnitrotalk.com/forum/showthread.php?s=&threadid=17038

Your truck will be a lot more stable with 2° toe in on the rear, 1° toe out on the front, 2° negative camber all around, and possably lighter suspension.

Then if you have a few hours on your hands, read this:

http://users.pandora.be/elvo/

 

[El Pirata]

Originally posted by Lessen
I would definately invest in a good radio system if you can afford it. With all the technology availible these days I can't imagine any reason that one couldn't control ANY vehicle with ANY power/weight ratio.. if it's within ones budget. But as far as the truck itself. For WOT stability straight line stability, maybe try to toe IN the rear tires a little bit... test... tweak... test again... till it seems better but still turns within reason. As far as launching off the line... well, your either gonna have to get a real sensitive trigger finger or get a radio system with traction control. (amazing what video games can teach you these days eh?). I look forward (I REALLY do mean that) to the same tuning pains sometime in the future when I get my DrifTMaxx finished..... twin outlaws 5.4 hp

oh.. and camber is the amound of angle a wheel has left or right relative to the ground.

for the left wheels looking forward...

|| 0 camber
\\ negative camber
// positive camber

The radio I am using is a JR XS3. While in no means the top of the line there are settings to help tame the ride and they mostly have been tweaked to the max.

 

[scottm]

Also look into better tires. Panther pins are pretty good, but my favorite right now is the proline 40 series bow-ties. They stick so well you have to relearn how to drive.

 

[El Pirata]

The have tamed slightly, but by no means controlled the uncontrollable.