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Post by dave632 on Nov 24, 2014 13:49:58 GMT -7
This was brought up in another thread so I though I would share some results.
I have not been able to get any 4 gears running well no matter what I have done to them and I don't think I am alone there.
I took my quickest 4 gear which has poly mags, 6 ohm arm, braids and shunts. It runs 1.0972 at 9.78mph with a pretty good 60' of .0876. This was a car that I sent in to one of the Pro Stock races this year and it won a round.
Just for demo and curiosity purposes I ran it against my fastest inline which will be run in the outlaw race in Jan.
I started the 4 gear at the 1/8th mile mark with the inline running the full 15' 7" both at 20v.
The spot was actually 10' 3" or 2/3rds of the track. The inline still won by .1704. It was like my Beretta running against a ricer. One other thing the 4 gear actually hit 9.03mph in the 5' run to the finish so it is running out of gear in the first 1/3 of the track. This tells me I have to figure out how to get a different gear ratio into a 4 gear.
I have not given up on getting a 4 gear running better and Jim is working on one for me but as a basic gear setup it is by far the worst idea out there. They should have simply extended the front of the chassis out a 1/4 inch and left the 3 gear setup alone, those I can get running pretty good as they can murder the 4 gears all day. I think a complete re do of the top plate will be necessary to get one running well. I have never ran away from a challenge so I will take this one on.
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Post by AJR on Nov 24, 2014 16:56:46 GMT -7
Dave my unlimited 4g Dragster runs consistent high .4's and it is highly modified...both electrically and mechanically. My MM/PS G3 consistently runs low .4's. Huge amount of work has gone into the 4g to get it to go that fast and survive...a years worth of racing to be exact. The G3 got to low .4's fairly easy with ceramic magnets. Both at 26v. My 4g is never going to touch an inline. It's like apples and oranges. There are several threads and some videos on the forum that go into detail about tuning the 4g. Those techniques can be applied to other builds as well. Friction, brush pressure, sloppy gears/axles, good parts combos all need to be focused on. Make sure the brushes aren't sticking...I see that a lot. Try mixing up your magnets and trying different sets with the same arm. These are just a few things that I focus on with these cars. Your build at 20v on your smooth track should be able to get into the .8's relatively easily. It's there man....you just gotta find it  . That's the fun part! I love getting out to the track and tuning. Hope this might help. |
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Post by dave632 on Nov 24, 2014 22:36:03 GMT -7
Thanks for the info. I do not give up easy.
I will plug away until I find out what works and what does not, had some real surprises in that dept. I have had some progress with 4Gs but nothing like the 3Gs and my modified inlines are becoming rockets. I will show them off at the outlaw race in January.
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Post by thejasonator on Aug 28, 2015 11:27:46 GMT -7
How does an 80's 70's era tyco inline match up to a modern 4gear? we seem to have close results but worried about braking out of our mostly box stock racing.Thoughts??
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Dan-O
Super Stock
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Post by Dan-O on Nov 25, 2015 17:56:16 GMT -7
I would like to hear some more on this as I am brand new to all of this. I ran my stock '80s Tyco inline(that is wore out!) against a few new stock four gears and it seems to be a good bit faster. I see more four gears than anything on here it seems though. What am I missing?
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Post by SKR on Nov 26, 2015 5:27:59 GMT -7
You're not missing anything. A stock AW 4G car is no comparison to a Tyco 440 chassis. The Tyco has a much more efficient design with it's 2 gear drive train compared to a 4G which has a total of 6 gears. The QC of the new AW cars are not that great also. A quick test by taking the body off and putting your thumb on the armature gear while twisting the rear wheels/tires lightly will show you how sloppy the drive train really is. You'll see the gears twist, lift, lean and all kinds of fun stuff. Now do the same with a 440 by holding the arm with your thumb and you'll see there is much less slop. With that being said that is what draws some of us to the 4G chassis. Tinkering with them by reducing the slop and some other modifications makes a world of difference. Add a $6 mean green armature and some braids on the pick up shoes and you'll have a 4G that will beat most stock inline chassis out of the box. Note; that the new 4G's also have too much down force. Depending on what kind of power you throw at it, you can most likely remove one of the traction magnets.
Check out some tech tips compiled by Nitro members in the following link:
4G Chassis Tips
This is a great video by Slotcar64. It's a must see for those just getting into the hobby.
The cars are also appealing due to the narrow rear end which allows the wheels to tuck underneath bodies. Below are some examples.
Anyways that is why I like them. If you guys are bracket racing, you'll have an easier time getting an inline chassis to run consistent. Most of my bracket cars are inline.
Sam
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