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Old 11-09-2005, 05:15 AM   #1906
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Originally Posted by Sow&Steady
If a 25t front side pulley can fit then that's what we need. It will also address somewhat the loose side belt issue.
I havent got to the belt issue yet. (Infact I've only built the rear diff and the front oneway as I am waiting for some goodies to turn up in the mail tomorrow)

So what exactly is the belt issue? My kit had an extra belt and a note to fit it rather than the otherone...
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Old 11-09-2005, 08:20 AM   #1907
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i installed the belt that the insert says to use because the other belt requires a crazy split of like 7mm
refer to the chart and you will see the difference. at least with the optional belt, an average split of 2mm will get you to 1 ratio.
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Old 11-09-2005, 10:43 AM   #1908
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Quote:
Originally Posted by Bundy_Bear
Hi Guys

For my own interest sake, does the MTX4 give you a gearing option not ot run over drive? The reason i am asking is the MTX3 is the most popular chassis at my local track, but we run on concrete and have to use rubber tyres.

I am not sure why, but i am told overdrive and rubbers don't go?

Look forward to the replies

BB
MTX4 Internal Ratio is 2.158
STD Pulleys are: one-way 28, mid 18, side front 24, side rear 18, brake 19, rear diff 41.
The MTX-4 has front overdrive right out of the box (rear: 2.158:1 / front: 2.074:1), it is about 4%. If you use the optional 23 T front side pulley, overdrive would be 9%.

Now, actually using 4% overdrive with Rubber tires is good specially if traction is normal to low.
I run my MTX3 with 4% front overdrive with front solid axle and rubber tires at my track, which has poor traction.
When i had front diff and no overdrive, my car would spin if i hit the gas to hard, now it is like on rails.

AFM
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Old 11-09-2005, 12:00 PM   #1909
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Are you guys just using the setup-board to set the track width for the front (199mm) and rear (200mm)? I guess I became abit spoiled from Assocated have a plastic gauge that was placed between the pivot-balls as you tightened them down so you would have the right track-width setting. My Hudy board has the markings. I just wanted to make sure I'm doing it right. Also, my kit came with only the Supplement Manual and a rubber side belt T0270. That explains why Mugen doesn't have the Urethan side belt T0267 in stock.
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Old 11-09-2005, 02:37 PM   #1910
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Originally Posted by mgreen
Are you guys just using the setup-board to set the track width for the front (199mm) and rear (200mm)? I guess I became abit spoiled from Assocated have a plastic gauge that was placed between the pivot-balls as you tightened them down so you would have the right track-width setting. My Hudy board has the markings. I just wanted to make sure I'm doing it right. Also, my kit came with only the Supplement Manual and a rubber side belt T0270. That explains why Mugen doesn't have the Urethan side belt T0267 in stock.
yes, you will have to use the setup board for track width. at first, i thought i was gonna miss the plastic thing also that came with the ntc3 when i switched to the mtx-3 almost 3 years ago. accidents big or the slightest would jack up the track width of the ntc3 making that plastic tool priceless. i built my mtx-3 prospec last february and last weekend, i checked the track width (for the first time since february) and it was still right on the money! i raced my mtx-4 for the first time last friday, it was awesome. but i got too excited and made a really big accident braking the shock tower! i checked the track width and it's still perfect.
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Old 11-09-2005, 02:53 PM   #1911
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Quote:
Originally Posted by afm
MTX4 Internal Ratio is 2.158
STD Pulleys are: one-way 28, mid 18, side front 24, side rear 18, brake 19, rear diff 41.
The MTX-4 has front overdrive right out of the box (rear: 2.158:1 / front: 2.074:1), it is about 4%. If you use the optional 23 T front side pulley, overdrive would be 9%.

Now, actually using 4% overdrive with Rubber tires is good specially if traction is normal to low.
I run my MTX3 with 4% front overdrive with front solid axle and rubber tires at my track, which has poor traction.
When i had front diff and no overdrive, my car would spin if i hit the gas to hard, now it is like on rails.

AFM
Still to buy a MTX4 that may work on rubbers using the 4% overdrive is still alot of money to spend. Is it just me or has Mugen overlooked those that run on rubbers, because the rest of the World runs on foams

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Old 11-09-2005, 03:00 PM   #1912
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hi, bundy bear,
i think the mtx4 is built to get best performance with foam tires.
when you will kill the overdrive, take a 25 pulley and you
become a overdrive 1:1.
dieter
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Old 11-09-2005, 04:20 PM   #1913
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Quote:
Originally Posted by sparksy
I havent got to the belt issue yet. (Infact I've only built the rear diff and the front oneway as I am waiting for some goodies to turn up in the mail tomorrow)

So what exactly is the belt issue? My kit had an extra belt and a note to fit it rather than the otherone...
Some kits come with 2 middle belts, one shorter than the other. The longer one is meant to be used with the 24t side front pulley. The other pulley in the kit is 23t and you are not meant to use this one.

With the 24t pulley you'll need a 2.5mm split, with the 23t pulley its about 5mm split. Using the 24t with the longer belt, you'll see that even with the belt tensioner at its lowest position, the belt is a little loose.
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Old 11-09-2005, 04:52 PM   #1914
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Quote:
Originally Posted by afm
MTX4 Internal Ratio is 2.158
STD Pulleys are: one-way 28, mid 18, side front 24, side rear 18, brake 19, rear diff 41.
The MTX-4 has front overdrive right out of the box (rear: 2.158:1 / front: 2.074:1), it is about 4%. If you use the optional 23 T front side pulley, overdrive would be 9%.

Now, actually using 4% overdrive with Rubber tires is good specially if traction is normal to low.
I run my MTX3 with 4% front overdrive with front solid axle and rubber tires at my track, which has poor traction.
When i had front diff and no overdrive, my car would spin if i hit the gas to hard, now it is like on rails.

AFM

What would the rear final be if we used a 19t on the rear side? Where did you find a gear chart to figure this out?

Thanks,
Joe Maxey
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Old 11-09-2005, 05:03 PM   #1915
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when you all keep saying 2.5 split or 5 split are you talking about tier diametre
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Old 11-09-2005, 06:08 PM   #1916
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Quote:
Originally Posted by ilaybrk
when you all keep saying 2.5 split or 5 split are you talking about tier diametre

Why yes they are Jack! Hey will I see you in Richmond Sunday?
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Old 11-09-2005, 06:16 PM   #1917
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Hey i was just wondering what the Mtx-4 chassis kit came with and what else i would have to buy to get it on the street?
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Old 11-09-2005, 06:27 PM   #1918
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Originally Posted by cars.cars.cars
Hey i was just wondering what the Mtx-4 chassis kit came with and what else i would have to buy to get it on the street?
You need to buy fuel, engine electronics, a starter box , ignighter and reciever battery..........No hop ups required to get it on the road. Oh...........dont forget a body!
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Old 11-09-2005, 06:28 PM   #1919
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back to running rubber tires:
If you run Pulleys: one-way 28, mid 19, side front 23, side rear 16, brake 19, rear diff 41. your overdrive will be 101.9, which is what would be almost perfect for rubber tires. This would tighten up the front belt and the side belt too.

This would creat a split of 1.2mm as well. and bring the front drive ratio to .472 to a rear of .463 and side of .695
stock drive ratios are:
front .482 to a rear of .463 and a side of .750

This would be about 5.5% more efficent on the side belt and 1% less efficent on the front.
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Old 11-09-2005, 06:33 PM   #1920
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so everything i need to get the factory kit ntc3 on the road i need for the MTX-4...
also is it a good street car (pebbles here and there and not very smooth) and race car or is it more of just a race car?
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