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Old 04-01-2010, 12:43 PM   #1
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Default DM-1 Spec Weight Loss Program

Looking to shed some weight off the DM-1 Spec, and curious what the big bang-for-the-buck items are. I have really liked how it handles so far, but it is heavy, and I am trying to figure out if there is much I can do without totally breaking the bank. And, if I need to break the bank, what are the must-have options? So far, the only thing I have really done is pick up a carbon front shock tower from maxvelocity to stand up the front shocks, and loose a little weight there.

This is to race in an "Open" GT class here locally in UT, which opens up motors and minimum weight, but still must run rubber tires.

Thanks for the input.
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Old 04-01-2010, 01:05 PM   #2
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I'm right there with you, wanting to lose weight. I'm definitely willing to go carbon with all the parts from maxvelocity, with the exception of the chassis.

But I'm sure there are other parts that could be lightened. For instance, are there titanium pillow balls out there that could fit? I'd like to know what information other people have!
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Old 04-01-2010, 01:09 PM   #3
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Hey Matt, did you get my PM from utahrc? I just put together that there was another DM-1 guy here locally. We will have to compare notes, and team-drive to keep the Kyosho guys down!
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Old 04-01-2010, 01:51 PM   #4
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Yep, responded there after I did so here...
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Old 04-01-2010, 05:25 PM   #5
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Try these guys, they just came out with a light weight chassis made from 7075 aluminum. Their products are first class!

http://www.kingheads.com/index.php?o...5d97e1206f5f01
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Old 04-01-2010, 06:16 PM   #6
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That chassis looks sexy! Honestly, so does the maxvelocity chassis, but the carbon fiber scares me on that level, as my driving is, shall we say, sketchy at best.

Does anyone know the weight savings of the maxvelocity carbon kit over stock? (not including the chassis). Does anyone else make carbon and/or lightened aluminum parts for this car?

Last question - I was told go titanium and/or aluminum screws to save some weight. Does anyone know if there is a package of Ti screws for this kit? Where is the place to get screws of this sort?
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Old 04-02-2010, 07:51 AM   #7
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I got my Ofna down to 6 pounds 14 oz dry without body. saved a pound.
Started with a kingheads chassis 30g. Maxvelocity carbon kit. front shocks saved just over a oz same with the servos tray. Maxvelocity if I remenber right was a 3 1/2oz saving alone. MUGE0142 pillow balls 1 more oz. the new O'donell buggy Titaniun steering post 10g. Lunsford Racing has titaniun screws but not as a kit. saving on screws are two titaniun the same as one stock screw so you can cut your screw weight in half. I also used a lipo 1320ma battery and made my own box to hold radio gear. 2 oz saving. OFN40596 lighten dif caps.
Also took my drill to some of the parts. drill the motor mounts and the head on my motor. I ran the O.S. V G because it is lighter and makes lots of power. Hope it helps
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Old 04-02-2010, 11:07 AM   #8
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Bubba Cola,
This is the the way to make the DM1 Spec lean and swift! Maybe you could package up a "weight reduction kit" for general consumption.
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Old 04-02-2010, 12:40 PM   #9
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Quote:
Originally Posted by wwoodruff View Post
Try these guys, they just came out with a light weight chassis made from 7075 aluminum. Their products are first class!

http://www.kingheads.com/index.php?o...5d97e1206f5f01
I have the King headz chassis and it is very light compared to the stock one (thanks to bubba cola), the King headz suspension mounts are also lighter than the others out in the market.
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Old 04-02-2010, 04:02 PM   #10
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[QUOTE=Bubba Cola;7219493]I got my Ofna down to 6 pounds 14 oz dry without body. saved a pound.
Started with a kingheads chassis 30g. Maxvelocity carbon kit. front shocks saved just over a oz same with the servos tray. Maxvelocity if I remenber right was a 3 1/2oz saving alone. MUGE0142 pillow balls 1 more oz. the new O'donell buggy Titaniun steering post 10g. Lunsford Racing has titaniun screws but not as a kit. saving on screws are two titaniun the same as one stock screw so you can cut your screw weight in half. I also used a lipo 1320ma battery and made my own box to hold radio gear. 2 oz saving. OFN40596 lighten dif caps.
Also took my drill to some of the parts. drill the motor mounts and the head on my motor. I ran the O.S. V G because it is lighter and makes lots of power. Hope it helps[/QUOTE

All of those parts must have cost more than the car itself (excluding the engine.)
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Old 04-02-2010, 06:19 PM   #11
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ok i use to own a mugen mtx 4r,it came stock with a 3mm chassis but when i switch to the 4mm chassis it put little more weight on the car which made the car way more stable in & out on the turns...so imo if you lighten the car too much the car will be unstable
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Old 04-02-2010, 07:27 PM   #12
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That makes sense, you put the weight where it would do the most good. Its usually not a good idea to take weight out of the chassis. Its like a ship that becomes top heavy because of ice build-up. The center of gravity is raised. Not a good thing with a race car, or a ship.
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Old 04-03-2010, 06:18 AM   #13
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I'll be sure not to race in a ice storm.
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Old 04-03-2010, 09:08 AM   #14
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Not bad.
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Old 04-03-2010, 11:05 AM   #15
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Quote:
Originally Posted by bobbyblaze View Post
ok i use to own a mugen mtx 4r,it came stock with a 3mm chassis but when i switch to the 4mm chassis it put little more weight on the car which made the car way more stable in & out on the turns...so imo if you lighten the car too much the car will be unstable
So, I make no claims at being an expert on this, and generally I agree with you, but I think the DM-1 will not suffer the same fate for the first pound or so of weight loss. It is a tank. Having said that, does anyone have experience running with a heavy then light DM-1? I am assuming it will help. I am sure I will never get down to 6lb+, but it seems like knocking off about 500 - 600 grams would only help.

What would be a good target weight to go for?
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