View Full Version : More MB tire stuff...
10-06-2003, 04:18 PM
I've played with the idea of using T-MAXX wheels/tires on the MB. I measured the stock Maxx wheel - too small I.D. to fit over the rear MB linkages.
However, I think a different offset wheel would work - Tower sells some higher offset wheels. They would then clear the suspension but would probably change the handling geometry of the buggy.
The other test would be a 40-series wheel/tire, such as some of the Pro Line offerings. They might be big enough I.D. to clear, while retaining closer to neg. offset.
Fronts don't appear to be a big problem; would just involve cutting a little off the stock axle housing steering arm and re-drilling the steering tie rod locations in closer. Any stock Maxx wheel should fit then, with hole reamed out a little.
Custom hex fittings would be needed, but a cut-off 5/16" hex-head bolt would work for that.
Anyone else tried this?
12-20-2003, 01:42 PM
Well, I went and purchased a set of 4 Ofna Monster Pirate wheels and tires off of ebay for the MB.
I finished machining a pair of aluminum hub adapters and stepped nylon spacers. The adapter will be bolted and set-screw to the stock axle; then Ofna wheel is bolted to the adapter using 4 of the 8 holes in the wheels.
The Ofna tires are about the same diameter, but MUCH wider! Unfortunately, each tire with adapter weighs about 5.5 oz. more than the stock MB rear tire. They are also positive offset, which might affect handling. I haven't ran them yet, but they sure look cool!
With winter here, I'll have to find a dry parking lot to test them (I haven't waterproofed my servos in the MB yet).
Here are some pics:
Ofna tires and adapters (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190372.html)
Adapter and spacers (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190374.html)
Adapter hub with set-screw (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190377.html)
Adapter face (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190390.html)
Spacers installed (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190395.html) Adapter positioned (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190398.html)
Ready for bolts... (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190400.html)
Mounted on wheel (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190405.html)
MB vs. Ofna (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190409.html)
Ofna tires are W-I-D-E! (http://home.comcast.net/~cadtech1/wsb/html/view.cgi-photo.html--SiteID-1190410.html)
For now, only mounting the rears. Maybe front later?
12-20-2003, 10:02 PM
Very cool looking! Good job as usual. Let us know how the first run goes! We don't have to wait to spring do we?? :o
Hate to tell you, 81 with t-shirt and shorts today!!!!!!
12-24-2003, 09:54 AM
CADtech - Have you run those wheeels yet?
Note: I contacted somone back east who, is building a Lexan sprint car wing for the MB. It should be good!!!!!!
12-27-2003, 04:32 PM
very nice job hope they work well.
i did read an artical somewhere where a guy stretched some t-maxx tyres over a set of bald mb tyres. he trimmed them down a bit and glued them i think he said it worked well.
very sorry but i cant find the link i will have another look.
12-27-2003, 07:03 PM
I remember the guys at RCAlloys "retreaded" a set of MB tires like that! I noticed it's not on their website anymore though. I know they quit making aluminum wheels for the MB some time ago (not cost effective, apparently).
I still think a set of aluminum Series 40 T-maxx wheels would be great! It would open up a lot of room for tire experimentation.
12-29-2003, 08:10 AM
yeah i think thats where i saw it on the rcalloys site.
i think he will make another run of wheels if there's interest. but good luck finding people with mb's.
40s would be great for the monster buggy.
speaking of wheels and tyres here is a link i dug up
it uses the wheels and tyres of a bergonzoni dominator.
hope this is usefull.
12-29-2003, 08:17 AM
01-02-2004, 10:23 AM
Hey- What are people using to secure thier wheels to the tires? I have tried CA and Silicone sealer, both no good.
P.S. - I opened an account at buytraxxas.com!
01-02-2004, 12:40 PM
Proline (or similar) CA tire glue. Glued almost 360 degrees around outer rim, and do all tires;
then go back and do the inside rim on all tires the same way.
Then let sit at least one whole day to cure. That's the important part!
01-02-2004, 10:36 PM
My engine has been cutting out on full throttle runs. Rec. pack is fully charged!
How do you adjust the rear"differential" gears? I don't see anything in the manual.
01-06-2004, 12:53 PM
it sounds like your too lean on the high speed needle.
how do you meany adjust?. the mb uses a planetary diff and it's unadjustable to adjust the diff action use a thicker or thinner grease on the internal gears. this will make the diff harder or easier to diff out.
how much fuel has been through the engine?
01-06-2004, 08:42 PM
Well, I have not had any trouble w/ the high speed needle so far. I have not even run 1 gallon through it yet. I do have a failsafe installed. Maybe I will take that out first.
I thought the rear "diff" final gears were adjustable. I see the manual gives a range of final drive ratios.
Will the optional spur and pinion raise my top end speed?
01-07-2004, 01:08 PM
oh yeah the gears are adjustable in the diff and so is the spur and clutch gear. i think off the top of my head that the optional spur and clutch gear will slow you down.
i think the diff gear is for a bit more speed.
if the engine is stalling its most likely a poorly tuned engine and not electronic.
01-07-2004, 09:45 PM
WEll, not really stalling at idle, move like cutting out on high speed WOT runs. Cuts out, cames back!
01-08-2004, 11:50 AM
yeah it sounds like your hsn is to lean. the engine is stalling at full throttle because of no fuel. i'd suggest you richen it up a bit.
01-08-2004, 06:54 PM
Check your plug too - gray is too lean. Coffee brown is good.
Black or oily is too rich.
Better to be rich than lean though...
01-11-2004, 08:36 AM
Okay, I pulled the plug and it was black/oily. I see in the manual the low speed is on the right and the high speed on the left. Which one and which way do I turn them?
I managned to hit a fence at the ballpark. Spent yesterday doing reparis.:mad: :mad: :mad:
01-11-2004, 11:23 AM
Clockwise to lean it out, Counterclockwise to richen.
When you go to adjust, be sure to count your turns - usually by 1/4 or 1/2 turns. 1/8 when you are fine tuning.
Start by carefully turning the needles in, counting as you go, until the needle JUST seats - DO NOT CRANK ON IT ONCE YOU FEEL THE SLIGHTEST RESISTANCE! Doing so will damage the needle face and the seat that it sits on.
Record how many turns it took you to bottom out. Now begin turning the needles out counting the turns and recording your final settings. That way, you can make fine 1/8 turn adjustments after running; test, adjust, test adjust. Repeat until perfect!
Low speed should start at 1 -1/4 turns out; High speed needle start at 1-1/8 turns out. Fine tune from there.
Run for a bit and check your plug often. The plug is the best indicator to tell if you're running too lean or too rich.
If you're low speed seems fine for now, don't mess with it!
I'd say try resetting your high speed.
What is your high speed set at now? You're running a tuned pipe too, aren't you?
01-11-2004, 02:55 PM
Hi CADTech, I tried 1/4 clock-wise and that was worse so, went back the other way w/ the H needle. Then, I had to lower the idle a bit. Man, it sure is burning a lot cleaner! It was not cutting out on full throttle runs and seems a bit quicker. I am not running the tuned pipe.
Not near as much smoke when I start either. Finally got my second gallon of gas too. I had forgotten if 87 or 91 is reccomended so I got 87. Yesterday late I installed a new servo arm for the 1 steering servo I have. It works much better then the round disk.
1 thing left to fix, I have already broken off the exhaust elbow. I tried 5/8 fuel line and it melted. What do you use?
Finally I can run without fixing.
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