Serpent 720

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Old 06-26-2007, 01:40 AM
  #2626  
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Originally Posted by Sow&Steady View Post
Eudardo, any manufacturer will be fine .. I bought mine a long time ago for the 710 and now I use them in the 720. Are you sure you want to do this? You can go crazy you know ...

OK, if you insist, here are the things you can do :-

- LiPo battery (I've used the VXR in the 710 and therefore it fits the 720)
- use the LCG chassis (not the SPP)
- change the main shaft to a Ti one
- use an Al one for the mid-shaft
- DO NOT use any Al pulleys or the radio bracket, or the front ARB holder
- change all screws to Ti of course
- change all ball joints to Ti ones
- don't use the roll-over handle
- use teflon adjusting nuts
- don't use the radio cover, use only the bracket and tape your Rx to it
- use ceramic bearings
- use carbon
- the lightweight version of pulley adapters
- use carbon pivot pins (you can't buy these ready made though)
- use Al brake disc (or a carbon fibre one)
- use Ti or Al turnbuckles
- use rear ball diff with ceramic balls (not geared diff)
- use a locked front one-way
- use a smaller/lighter heatsink on your engine
- use Futaba 9550 servos
- use ONE coat of paint on your shell!

Of course there's more but when I did most of the above to my 710, I got it down to under 1400gms, with PT, small tyres, no fuel and no shell on which is illegal for normal racing.

OK, OK, I used Al screws for those phillip head ones.

If you are racing on ROAR/IFMAR/EFRA rules and only want get the car to just about legal, I find that just with the LiPo and Ti screws, the 720 is already under 1725gms (with PT, tyres and shell).

I hate to do this because they caused me no end of aggro in the past but RC Mushroom has tons of Ti/Al bits you can choose from. (p/s: sorry, I got lazy and just used "titanium" in the search so you'll see other parts which are NOT actually ti, just ti colour.)

Lastly, I like Speedmind Ti screws, their heads seem to last longer than the Take-Off and Xenon Racing ones.
wow, with all that list i can almost buy another 720 kit
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Old 06-26-2007, 03:27 AM
  #2627  
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Originally Posted by buboy28 View Post
wow, with all that list i can almost buy another 720 kit
Spot on, this is why I have THREE 720s these days!
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Old 06-26-2007, 06:37 AM
  #2628  
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Default GLC seup

I will be attending the GLC in Aug. and I am looking for some set up help.
The last time I ran there in 2005 with my MTX3 I ran into traction roll. and 2 speed problems.

Just wondering whats a good starting set up and also what are some parts that will fail at the track .

Also if any one ran into traction roll problems what setup did you use to correct the situation.

I plan to run a JL red dot Murman mod and need clutch and gearing help.

Someone told me that run time with that motor will be poor at the track due to the amount of time you spend on throttle. I will have a os speed tuned and a plus ct as back up motors.

Thank for the help

Lroy
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Old 06-26-2007, 08:42 AM
  #2629  
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Originally Posted by lroy View Post
I will be attending the GLC in Aug. and I am looking for some set up help.
The last time I ran there in 2005 with my MTX3 I ran into traction roll. and 2 speed problems.

Just wondering whats a good starting set up and also what are some parts that will fail at the track .

Also if any one ran into traction roll problems what setup did you use to correct the situation.

I plan to run a JL red dot Murman mod and need clutch and gearing help.

Someone told me that run time with that motor will be poor at the track due to the amount of time you spend on throttle. I will have a os speed tuned and a plus ct as back up motors.

Thank for the help

Lroy
I ran there last year with a similar motor and had no problem with run time. For set up I would run a front lock. There are a lot of side to side turns. A car with quick responce, but having chassis roll will work well. Traction was not a big deal for us with the 720, just try not to ride the burms, the burms will roll you over.

DJ
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Old 06-26-2007, 08:53 AM
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Motor shim question


I have the Max SL3 12
and the Max XL9 21
I plan on useing 30% nitro with both motors can any one recomend the head shims I need to use




thx
Lou
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Old 06-26-2007, 11:49 AM
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Originally Posted by look View Post
Motor shim question


I have the Max SL3 12
and the Max XL9 21
I plan on useing 30% nitro with both motors can any one recomend the head shims I need to use




thx
Lou
On the .12 engines you can run a total of .5 shims... On the .21 you can run .70 total for the 1/8th cars. Remember this is at sea level and depending on where you are it might be less. The tighter you run the shimming of the engine the more you risk damaging the glow plugs and if you lose a glow plug the filiment might scratch the piston........

Rafael
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Old 06-26-2007, 01:08 PM
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Originally Posted by dj apolaro View Post
I ran there last year with a similar motor and had no problem with run time. For set up I would run a front lock. There are a lot of side to side turns. A car with quick responce, but having chassis roll will work well. Traction was not a big deal for us with the 720, just try not to ride the burms, the burms will roll you over.

DJ

Thanks DJ
I look forward to meeting you and all the Serpent racers at the 2007 GLC
Lee
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Old 06-26-2007, 01:10 PM
  #2633  
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Originally Posted by lroy View Post
Thanks DJ
I look forward to meeting you and all the Serpent racers at the 2007 GLC
Lee
I can not make it this year. My next big race will not be until the nats in Texas......
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Old 06-26-2007, 02:35 PM
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Originally Posted by dj apolaro View Post
I can not make it this year. My next big race will not be until the nats in Texas......
DJ when and where in Texas will that be?
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Old 06-26-2007, 03:27 PM
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Originally Posted by Sow&Steady View Post
DJ when and where in Texas will that be?
I have not looked yet, but it is for the 2007 sedan nationals.
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Old 06-26-2007, 03:58 PM
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2007 ROAR Nationals, November 9 - 11, 2007
Gulfcoast RC Track (aka Gulfcoast Raceway), Porter, Texas

Web Sites: http://hometown.aol.com/gulfcoastrct...strctrack.html

also http://www.mikes-hobbyshop.com/

ROAR 2007 Nationals info:
http://www.roarracing.com/nationalraces.php
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Old 06-27-2007, 06:06 AM
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Originally Posted by rmdhawaii View Post
2007 ROAR Nationals, November 9 - 11, 2007
Gulfcoast RC Track (aka Gulfcoast Raceway), Porter, Texas

Web Sites: http://hometown.aol.com/gulfcoastrct...strctrack.html

also http://www.mikes-hobbyshop.com/

ROAR 2007 Nationals info:
http://www.roarracing.com/nationalraces.php
Ah thanks Rainer ... I should try to "arrange" a business trip to Texas and sneak over to watch maybe.
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Old 06-28-2007, 09:37 PM
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What's the part # for the optional hard clutch spring that comes with USA spec kit?
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Old 06-28-2007, 10:38 PM
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Originally Posted by RoyU View Post
What's the part # for the optional hard clutch spring that comes with USA spec kit?
Stock: http://www.serpent.com/product/6586/
Harder: http://www.serpent.com/product/909518
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Old 06-30-2007, 11:38 AM
  #2640  
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hey guys! did anyone ever notice wear on the aluminum pinion? If so any tips or options like steal pinions? Thanks!!
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