GS Vision Pro Forum - Page 12

rcabj · #**276** 04-07-2004, 12:27 AM

hi guys....seems quiet on the gs vision everywhere i think....

aren't gs planning to upgrade the vision or maybe a total new look....??

KawadaKid · #**277** 04-07-2004, 02:39 AM

Look for some new stuff soon. Theres a "Pro team" kit that will be soon available and maybe some updates. Garen might be able to give more detail.

PaulH · #**278** 04-08-2004, 12:31 PM

The course I race at has long straights and sweeping turns. As such, I would like to try out a solid rear axle. Garen told me how to lock the rear differential, but I would like to reduce the rotational mass. The Vision Pro and the older Mugen MTX-2 appear to be almost identical in many ways. Is the Mugen MTX-2 rear differential the same size, as measured from bearing to bearing, as the one used in the Vision Pro?

If so, the Fioroni Ergal solid rear axle for the MTX-2 is a good deal at $20. The pulley is not included, so I would be able to attach the Vision rear pulley without too much trouble.

Any thoughts or suggestions?

Thanks!

--
Paul

darkangel · #**279** 04-11-2004, 09:59 AM

PaulH,

I have thought the same thing when I was looking at the negative diffs, but the spacing between the bearings are the least of the problems. I believe, although I could be wrong, that the diff pulley for the mtx and vision are at two different places. At $20 it may still be worth a try. Let us know how it goes.

PaulH · #**280** 04-11-2004, 12:31 PM

Quote:

Originally Posted by darkangel

PaulH,

I have thought the same thing when I was looking at the negative diffs, but the spacing between the bearings are the least of the problems. I believe, although I could be wrong, that the diff pulley for the mtx and vision are at two different places. At $20 it may still be worth a try. Let us know how it goes.

Okay, that's good to know. I was able to get my hands on a copy of the MTX-2 instruction manual. It doesn't give any measurements, but it does give a good feel as to the proportion and location of the various parts. The MTX-3, on the other hand, is quite different. I doubt that there is any way MTX-3 parts would work on the Vision Pro.

From what I can see on the MTX-2 manual, the entire back-end is virtually identical between the Mugen and the GS. The rear pulley mounts on the same (right) side of the car, because the power comes from a pulley mounted to a brake adapter on the two-speed lay shaft.

I was being cheap and didn't want to blow the $20 for nothing, but I guess it's worth a try!

--
Paul

PaulH · #**281** 04-12-2004, 03:24 PM

Quote:

Originally Posted by darkangel

does anyone have the overdrive charts made up for the vision?

Here's a basic chart. I put this together in Excel, but have pasted it here in plain text for you to use:

Code:

		First Gear											
Pinion Gear			14		| 		15		| 		16			
Spur Gear	49	48	47	46	| 49	48	47	46	| 49	48	47	46
Gear Ratio	3.50	3.43	3.36	3.29	| 3.27	3.20	3.13	3.07	| 3.06	3.00	2.94	2.88
Drive Ratio	7.88	7.71	7.55	7.39	| 7.35	7.20	7.05	6.90	| 6.89	6.75	6.61	6.47
Overdrive Ratio	7.46	7.31	7.16	7.00	| 6.96	6.82	6.68	6.54	| 6.53	6.39	6.26	6.13

		Second Gear											
Pinion Gear		17		| 	18		| 	19					
Spur Gear	45	44	43	| 45	44	43	| 45	44	43			
Gear Ratio	2.65	2.59	2.53	| 2.50	2.44	2.39	| 2.37	2.32	2.26			
Drive Ratio	5.96	5.82	5.69	| 5.63	5.50	5.38	| 5.33	5.21	5.09			
Overdrive Ratio	5.64	5.52	5.39	| 5.33	5.21	5.09	| 5.05	4.94	4.82

The drive ratio is computed as 24/18 * 27/16 * Gear ratio (front), or 45/20 * Gear Ratio (rear). The result is 2.25 * Gear Ratio.
The overdrive Ratio is computed as 24/19 * 27/16 * Gear ratio for the front, which is 2.13 * Gear ratio. Remember, this affects only the front wheels.
A low Ratio = High speed, low torque. A hi Ratio = Low speed, high torque.

PaulH · #**282** 04-19-2004, 09:29 AM

This past weekend I tried out the GS front one-way and a rear solid axle. I locked the diff as suggested by Garen. I must say that I was very impressed with the performace of the vehicle in this configuration! I was able to dive into the corners much more easily, and maintain my line without any trouble! I had to soften my brake and adjust the braking EPA to a bare minimum to prevent spin-outs. I would like to be able to apply the brake a little harder, so I will be programming an ABS mix on my transmitter for next time.

The only problem that I had was in converting my diff to a solid axle. One of the pins in the outdrive cup tried to cam out the plastic of the diff. There is just enough play in the setup for this to happen. I used some thick CA glue to hold the pin in place for the rest of the day, but that is an imperfect solution, at best. Now, more than ever, I'm thinking of using an MTX-2 solid rear axle in the Vision.

--
Paul

KawadaKid · #**283** 04-19-2004, 03:02 PM

I got to drive my Vision today for the first time this year and wow, its still driving great even after sitting for all winter. I need to go through and put some fresh parts on it and get some new meats thow. Looking forward to another great year of racing with my Vision.

Vegas Racer · #**284** 04-25-2004, 02:13 AM

It's good to see that there is a forum to get information on the Vision Pro from people that are running them at their local tracks. I have raced mine once and have run it in the street a few times breaking in the engine. The Vision was the first kit I have ever put together other than running an RTR the first few months. I have only been in the sport since Sept. and won't give it up now. Hooked.

2furiou5 · #**285** 05-01-2004, 10:45 PM

HELLO EVERYONE IM NEW TO THE FORUM. I WAS WONDERING IF

SOMEONE COULD SHED SOME LIGHT ON THE SITUATION IM HAVING?

IM NEW TO USING A STARTER BOX AND THE PROBLEM IM HAVING IS

THE STARTER WHEEL STARTS THE ENGINE BUT AS SOON AS I TAKE

IT OFF THE STARTER WHEEL IT STOPS. I WAS WONDERING COULD IT

BE THE CRANKSHAFT IS TO LONG AND I NEED TO CUT IT SOME MORE

OR IS IT THAT I DIDNT SET UP THE CLUTCH UP RIGHT? BY THE WAY

MY CAR IS A VISION PRO PLEASE HELP ME

nitrothugg · #**286** 05-02-2004, 08:15 AM

no, i seriously doubt that the crank or clutch is the problem. its more of a tuning issue. but i suck at trouble shooting engine problems. post your question here and you will get some fast answers. good luck.

p.s.
get rid of the caps lock

KawadaKid · #**287** 05-02-2004, 02:18 PM

Erm.....Glow Plug?

2furiou5 · #**288** 05-02-2004, 07:28 PM

its a new engine, new glowplug to

KawadaKid · #**289** 05-02-2004, 09:04 PM

Doesnt mean its perfect. Glow plugs can be fouled very quickly. Make sure your needles are right as well.

2furiou5 · #**290** 05-06-2004, 06:22 PM

does anyone have good gear ratio setup for the vision. preferablely for oval
and also for multiple turn tracks ?

darkangel · #**291** 05-06-2004, 07:41 PM

How big of track (Length x Width)? Longest straight-away? Tight or open? What engine? These all come into play when setting up gear ratio. Right now I'm using the stock gearing for a 175 x 90 ft track with a changing infield each race. I'm using a RB X12 engine, which is more of a rev engine, so I gear for more torque to get more speed on the track.

2furiou5 · #**292** 05-08-2004, 03:48 AM

im running a mugen mt12, id say the track is about 175x125 ft oval track with banked
turns on all four corners. with the stock gearing what do you think your top speed is?

darkangel · #**293** 05-08-2004, 07:16 PM

I really don't pay too much attention to top speed, because I run on road courses that vary from week to week.

For an oval with banked curves, I wouldn't worry too much about 1st gear as it is meant primarily for acceleration. I would probably go to 18/44 to start off with on the second gear and work the first gear to probably a 3 tooth split. My best advice is to experiment with the gearing to find what is best for your track and your set-up.

nitrothugg · #**294** 05-09-2004, 12:49 PM

i was rebuilding my 2-speed and noticed that i had - and the manual says - to install the finger in the direction to where the "finger" would rub the 2nd gear pin.

i was wondering why that is? why not put it on the direction to where the finger would actually hitch or grab the pin?

i hope you guys understand what i'm saying.

KawadaKid · #**295** 05-09-2004, 01:06 PM

Ive got mine in so that the Adjustment screw is behind the screw to lock it onto the shaft. In that position im pretty sure it grabs the pin.

nitrothugg · #**296** 05-09-2004, 07:59 PM

yeah, thats the way it says to put it in and thats the way i use it and mine works good. i was just wondering why it is not the other way around. oh well, if it broke, dont fix it.

PaulH · #**297** 05-17-2004, 05:05 PM

Just a quick question for Garen:

I tried setting up the rear diff as a solid axle, per your instructions. I found the handling to be absolutely phenominal! Unfortunately, the pin under the bearing next to the pulley rounded out the plastic after a while, causing the right wheel to almost free-wheel. I tried using CA glue to hold it in place, but that only worked for a little while.

Do you know of any other vehicle, such as the Mugen MTX-2, that has a solid axle that could be used in place of the converted Vision diff?

Thanks!

garen · #**298** 05-17-2004, 09:05 PM

paul, send me an email, i'll see what i can do about getting you a solid axle...don't expect any reply for the next couple of weeks though as i will be out of the office.

PaulH · #**299** 05-18-2004, 07:38 AM

Quote:

Originally Posted by garen

paul, send me an email, i'll see what i can do about getting you a solid axle...don't expect any reply for the next couple of weeks though as i will be out of the office.

Sent! Thank you!

icyunvmyrc · #**300** 06-02-2004, 01:32 AM

I just bought a gs vision pro kit off ebay, Ive been doing some research on it and havent found too much of anything except for this forum. Just hoping to keep this thread alive now that Ill be using it more often. I purchased everything seperately off ebay and havent received it all yet but this is my set-up.

Team orion wasp .12 http://www2.towerhobbies.com/cgi-bin...?&I=LXCJZ5&P=7

Team orion pipe/header http://www2.towerhobbies.com/cgi-bin...00&FVPROFIL=++

Jr xr2 radio and z-270 servos 'all out of my xxx-nt'

I did pretty good as far as waiting for good deals to come along.
I got the kit NIB for $135 shipped
The engine for $76 shipped
The exhaust for $60 shipped

Can anyone hook me up with a site that go's into detail about set-up for this car. I dont have a clue how to tune on-road cars for different tracks. After someone gets to know their car how difficult is it to take a few laps around the track and be able to tell what needs to be changed with the set-up. Im a nascar fan myself and know that those guys can tell when 1/2# of air pressure is changed in one of their tires, I Just cant imagine someone knowing their rc car that well.