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Old 05-19-2004, 08:08 PM   #4801
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The BMI Pro4 chassi is great. Looks great and works just as good.
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Old 05-19-2004, 08:11 PM   #4802
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Quote:
I think I have the solution. I'm going to think about selling my car and look at something else
I was at that point. But after ordering from Rainbowten and seeing that I don't need the slow old way US LHS work. I will just keep the car. Its too nice just to give up on. The new Tamiya EVO4 looks very nice. Wonder how long it will be around before the next model comes out? The R3 looks too gay for me. Plus Speedtechrc is the only place that carries parts in the US.
WYD- Whats parts are you needing?
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Old 05-19-2004, 08:35 PM   #4803
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Right now I need some spare a arms and another set of front steering blocks. I think my shop might have them now. Need to call them Friday. I don't to have to order over seas all the time to get stuff either but I would if all else would fail.

My buddy has a R2 and R3 Cuda and they really run great.
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Old 05-19-2004, 10:24 PM   #4804
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the outdrives in my oneway doesnt seem to spin true, when the housing itself is in the gearbox, it spins ture with no wobbling but when i put the outdrives in you see them wobbling while they spin.

i can also feel the wobbling when i hold the ball bearing and spin the whole unit.

its no big problem for me but im just wondering if anyone else noticed it.
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Old 05-19-2004, 11:06 PM   #4805
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Default Set-up question

Hey all,

Can anyone post there findings on what they felt different when they went from 2.5 degree front arm sweep to zero?

I went from 2.5 to 1.0 to 0, but always a week apart-so its hard for me to know what it did, except as I got closer to zero arm sweep-I find the cars steering to feel very odd. Like it lost more and more turn in the more arm sweep I took out. And when i put in more steering throw to compensate that caused some other issues.

I really feel like I have to toss the car into the corner now at zero arm sweep-but it could be other thngs I changed too.

HELP!!
Ray
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Old 05-19-2004, 11:13 PM   #4806
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Ray,

When you were making your changes to front arm sweep, what were you looking for? By that, I mean were you looking to dial down the steering reponse? Were you looking to get the rear end to hook up more?
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Old 05-20-2004, 07:32 AM   #4807
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Quote:
Originally posted by RCBuddha
Ray,

When you were making your changes to front arm sweep, what were you looking for? By that, I mean were you looking to dial down the steering reponse? Were you looking to get the rear end to hook up more?
I was hoping to increase corner speed by reducing traction-which I thought was a benefit of the 0 degree, but it seems that it night have gone too far.

Heres the set-up so far: Again--this set-up isnt horrible and its not hard to drive. Its just not what I'd call dialed yet!!

Front
60 wt AE oil #4 piston, Purple AE spring. SHock in on arm and one hole in on tower.
Camber link short and raised 2mm
6 caster block.
1mm shim in front and 2mm in back for anti-dive under hingepin blocks.
0-arm sweep (going back to 2.5)
1mm uptravel for droop
#2 position for steering
no sway bar
Diff TIGHT
4.5mm ride height
Jaco DBl pink/Orange 2.24"

Rear
40 wt #3 piston, Copper AE spring, shock out on tower, middle on arm.
Camber link in on diff case raised 3mm and in on hub.
0.5mm shim on back under hingepin block.
. LRC front for pro-squat (made car loose on exit) Also ran 1mm Anti-squat-better.
1.5 toe in (more high speed steering than 2)
2mm uptravel for droop (tried 1.5-too edgy)
4.5mm ride height.
Wheelbase small shim in front, big in back. Width-full in frnt and 1/2mm shim in back.
Jaco DBl Pink 2.24"

I think thats it!!
Ray

Last edited by rayhuang; 05-20-2004 at 07:54 AM.
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Old 05-20-2004, 07:49 AM   #4808
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Ray- you did not mention what roll-center blocks you have on the car. Have you tried playing with those. Typically you run lower blocks in Carpet. Just a thought.

I drove Billy X-ray Tuesday. Man that thing was twitchy.
But if he can drive it then it does not matter how it feels to me.
I have not drove carpet in 3 months. And a MTX3 is not as responsive as a carpet car. I am not used to it.
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Old 05-20-2004, 07:53 AM   #4809
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Quote:
Originally posted by 2Fast4U2
Ray- you did not mention what roll-center blocks you have on the car. Have you tried playing with those. Typically you run lower blocks in Carpet. Just a thought.

I drove Billy X-ray Tuesday. Man that thing was twitchy.
But if he can drive it then it does not matter how it feels to me.
I have not drove carpet in 3 months. And a MTX3 is not as responsive as a carpet car. I am not used to it.
Yes-I hear Billy likes em twitchy!!!

The roll centers I put down as shims for anti-dive and pro-squat. Sorry for the confusion.
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Old 05-20-2004, 07:58 AM   #4810
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Default BMI Pro4 pics

Heres two pics. You can see the camber link positions etc.
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File Type: jpg pro4rear.jpg (66.6 KB, 177 views)
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Old 05-20-2004, 07:59 AM   #4811
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Default PIc #2

And one of the front.
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Old 05-20-2004, 08:02 AM   #4812
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I re-read it and understand now. I personally have never had much luck with pro-squat. Have you tried less toe-in in the rear. Depends on the traction, I guess.

Good luck with it. I will be needing a good setup for this fall for carpet. To play with Billy.
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Old 05-20-2004, 08:11 AM   #4813
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When I ran at a track called RIver Junction in PA the Pro-Squat worked GREAT. The car wouldnt rotate the exit and felt a little sluggish to change directions. The Pro-squat kept the car rotating at speed. At the Gate-most everything that felt great at RIver Junction is not working here. But they are very different tracks in terms of grip. RIver Junction is full of Jack the Gripper and groove is black. The gate people run some paragon and some run NIftech-but theres no groove to be seen on a practice night.

I am inclined to think Pro-squat works well on tighter tracks or tracks with fast direction changes. But doesnt feel as good on a bigger faster track. Mkes the car feel loose on longer corners.
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Old 05-20-2004, 08:52 AM   #4814
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Wish I had some ideas for you. I have only run my pro4 twice. And that was outside. Our track is a probably considered low traction to yours. I know that Tony has his looking really good the time that I saw it. Give me a couple of months and I will be
back in carpet to compare set-ups. I was running sway bars on
my tc3. I liked the double purple and purple. Have you tried differnt tires on your car with the same set up?
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Old 05-20-2004, 08:58 AM   #4815
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Ray, taking front arm sweep out will slow the turning reaction of the car. It basically calms the car down. I tried taking the arm sweep out of a Losi one time with using TC3 front arms and the rear Losi bar. It made the car push on a loose track but felt real nice on a high bite track.

I tried adding 1mm to the inner camber link on the front and rear of the car as well as lowered the roll centers by 1mm front and rear which resulted in a car that felt lazy and had very little side bite. I lost 3-4 tenths of a second per lap. This was on a track that I felt had quite a bit of grip. Is it possible that you removed too much grip from the car so it lost its corner grip/speed?
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