Air control problems with 8th scale buggy

[Thirdgen89GTA]

Funky stuff here and I can't figure out whats going on. All sunday we were hitting the ramps pretty hard and occasionally my car would nose up real bad so i'd hit the brakes to bring the nose down. At full brake the nose simply doesn't go down...

I checked the front and rear brakes and both binders are working just fine, I can hall it down from 50mph or so in about 10 ft. I checked it while holding the car up in the air and all 4 wheels stop when I hit the brakes. The cams move freely, and the brake bias is close set so that when I hit the brakes its nearly equal brake bias front and back.

Any other reasons why I'm having trouble getting the nose down? I've had problems before on my other buggy when the front brakes weren't working, or the rear brakes not working. But both front and rear brakes work fine.

Funky stuff. Anyone have some ideas as to what else to look at? The wing is set to normal downforce, so its not putting massive downforce on it.

[Ponch]

Naa that's about how my buggy is too, the tires aren't that heavy so there's not much impact slowing them down is going to have on the overall pitch of the buggy...Like MT's, they have alot of meat on the tires, and that's why with most MT's, b-flips are easy. Buggies, you try to do a backflip and it's a very very close call and most of the time you won't make it around in time. If you threw some 17mm trug tires on your buggy I bet you that you could get that thing to nose-down in an instant.

The solution; get off the gas either right when you touch the ramp or about 1/2 way up.

[Czech-it-Out Graphics]

set the front brakes tighter than the rears and it will go nose down better,

I race with like no front brake so its a pain in the ass trying to adjust the car in the air lol

[Thirdgen89GTA]

Naa that's about how my buggy is too, the tires aren't that heavy so there's not much impact slowing them down is going to have on the overall pitch of the buggy...Like MT's, they have alot of meat on the tires, and that's why with most MT's, b-flips are easy. Buggies, you try to do a backflip and it's a very very close call and most of the time you won't make it around in time. If you threw some 17mm trug tires on your buggy I bet you that you could get that thing to nose-down in an instant.

The solution; get off the gas either right when you touch the ramp or about 1/2 way up.

I didn't quite explain myself. A few weeks ago if I hit the brakes it would practically nose dive into the ground. Now hitting the brakes as little to no affect on the attitude of the car.

set the front brakes tighter than the rears and it will go nose down better,

I race with like no front brake so its a pain in the ass trying to adjust the car in the air lol

I'll have to try that, currently I have it set so that the rears are a little stronger, I like oversteer way more than understeer during braking.

[Tex]

This is what I was going to type as a resolution

"The solution; get off the gas either right when you touch the ramp or about 1/2 way up."

[Thirdgen89GTA]

I usually get off the gas as soon as I clear the ramp, we are going for maximum height and distance here.

I used to have complete control of the car, I could bring it back level from a fully inverted position before landing. Now though its sluggish to bring the nose down even from a 45* angle.

The only other thing I can think of is that i recently changed out to a much thicker fluid in the center diff because running on pavement and general bashing was killing the front tires. I switched to 30k center and that really helped tire wear. But I ran 30k center in my old Ultra Comp 2 buggy and it had no problems nose diving if I laid into the brakes while in the air. And if I hit the gas it brought the nose up very quickly as well.

[Czech-it-Out Graphics]

try turning ur idle down or atleast check it, if u have a bad tune or it is off, ur car may idle high right after coming off of full throttle

[Thirdgen89GTA]

But i'm fully on the brakes and it won't nose down, the wheels aren't even moving anymore. As it the wheels are locked and not moving in the air, which used to be enough to get a nose dive out of the car if I wanted it.

The idle is fine, comes right down.

[Ponch]

If your wheels are locking up in air, and the nose still isn't going down, there's nothing you can do but get off the gas earlier on the ramp.

[Czech-it-Out Graphics]

ya once the wheels lock up its over, try tapping the brakes instead of holding them on, if u hold them on it will just start to fall like a brick lol

[Thirdgen89GTA]

But thats not quite hitting the real reason I made this post. I'm fully aware of what needs to be done to control the car in the air and I've never had problems with it.

However, what could change to cause such a drastic difference in the way it handles in the air BESIDES the driveline. I haven't relocated any components rearward, I haven't increased rear downforce or switched to a different body.

The car used to nose dive on command, and now it wont. See what I'm trying to get at? I'm looking for solutions other than lay off the gas earlier. I used to be able to right the car from an inverted position as in lid down, wheels up completely to landing on my wheels just by locking the brakes.

I'm looking for other causes besides the wheels centrifugal force. its not reacting the same in the air as it used to and thats what I'm trying to figure out.

[joey]

you didnt switch battery packs?

[Thirdgen89GTA]

Nothing has changed. The only minor change has been that I dropped 30k in the center diff instead of the 10k that was in there. However, when the wheels are locked under full brake then the center diff isn't even moving so that would n't affect the flight attitude unless it was spinning.

The last major change was dropping the OS 30vg in there, but that was weeks ago and it just changed from last week to this week.

[Tex]

did you have the ramp in a slightly different location, maybe a different angle?

[Thirdgen89GTA]

Its in the general location we usually put it in. its a lot of air time, close to 2 seconds worth of hang time. Plenty of time to correct and I still can't bring the nose down.

The ramp was right about where it usually sits, and the curb its sits on is the same height everywhere.

This is a vid of johns buggy jumping, I was hitting the same jump all day. As you can see, we have ALOT of hang time to bring the nose down.
http://media.putfile.com/8th-scale-buggy-jumps-50ft

[rocco79]

Hmmm... Switch back to 10k diff fluid .. See if that solves your condition...

[HAGASAN]

Your car is still on throttle when leaving the ramp, maybe not as much but it is. Your also going full throttle off that ramp and sailing for quite some time. Try going at half throttle and jump it for like 10 feet and see if you can ajust it in the air at that speed. Your Diff fluid aint the problem. Also your front shocks could be springing you high off the ramp if the shock oil is too thin, not sure about a bashing set-up tho.

Dimo post your forrest preserve set-up. He also has a baseball diamond set-up, Construction site set-up and grave yard set-up written down.

[Tex]

Dimo post your forrest preserve set-up. He also has a baseball diamond set-up, Construction site set-up and grave yard set-up written down.

LOL.....that's funny right there, I don't care who you are

[Thirdgen89GTA]

I have a drag race setup.

[Mr. Tune]

lol @ hagasan!

[Czech-it-Out Graphics]

Lol

[HAGASAN]

Lol:lol: :headbang: :owned:

[Mr. Tune]

Dimo post your forrest preserve set-up. He also has a baseball diamond set-up, Construction site set-up and grave yard set-up written down.

I never did thank you for those setups joe, so here you go...

Thanks for all those baddass bash setups Joe!!! You've helped me minimize breaking, gotten me optimal jump distances, killer traction on the loose diamond dirt, even your techniques for proper backflips was excellent!!

:lol: ZING!