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Old 10-03-2006, 03:55 AM   #1456
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Quote:
Originally Posted by Qlone
I've also broken the serpent ones. It's not the axle that is the problem for me, but the small insert that holds the pin at the wheel side that snapped... But if that happens the CV axle still works, it just wears out quite quickly, but not enough to not finish the racing day
Do you use the premium loop, this really helps the CVDs!

If you order CVD's now, you'll probably get new onces, this is a little different material from what they had.


I've also heard ppl not using the small 1.5mm hex screw to secure the pin, this sometimes shakes out and locks up the CVD. The pin itself is locked by the bearing so the screw is not needed.
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Old 10-03-2006, 04:05 AM   #1457
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I've put locktite on all the screws in the CVDs and so far haven't had one come loose.
I lubricate the CVDs at the start of every race day. Not using the premium lube, because I don't have it, but using a spray can of white grease that I bought at a car parts store. I also lube the clutch using this stuff and so far it's been working perfect.

To fix my CVDs I ordered the inserts separately, and a few spare axles. These parts separately are a lot cheaper than a completely new CVD...
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Old 10-03-2006, 11:13 AM   #1458
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I 've just realized that 720 cames with standard front overdrive. how can I change it to overdrive = 1:1 without changing the rear diff gear? the 720 gear diff has 47t and the 710 has 45t.

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Old 10-03-2006, 02:31 PM   #1459
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I downloaded the gear chart for 710/720. Could someone explain overdrive.... advantages & disadvantages (if any)?
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Old 10-03-2006, 03:08 PM   #1460
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Originally Posted by neltime64
I downloaded the gear chart for 710/720. Could someone explain overdrive.... advantages & disadvantages (if any)?
There is a certain amount of overdrive to the front that is perfect for the way you drive. I run a 1/8 car.

What I have found is that the more you overdrive the front the more power on push you get. Too much front overdrive also makes it difficult (for me) to control the turn-in because when you go from power on to power off you will suddenly get a lot of steering. Then as you accelerate out of the turn it will push because the front tires are spinning.

Too little overdrive to the front or overdrive to the rear causes the car to be very loose in the back coming off of the turn. However, you will have a TON of steering in a power on sweeper.

I usually run between 1 and 3% overdrive to the front (front tires are going 1 to 3% faster than the rear). This gives my car the stability I want without sacrificing power on steering or having a car that makes a radical change in turn-in when going from power on to power off.

Hope this answered your questions.
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Old 10-04-2006, 02:58 PM   #1461
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hey guys, just built a new 720
just tidying my electronics up, i was wondering where i stick my on off button??
any help
thanks
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Old 10-04-2006, 03:02 PM   #1462
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I double wall tape it on the steering servo (top)
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Old 10-04-2006, 03:10 PM   #1463
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The 720 cames with 6% of overdrive. it is a lot for me. I will change the pulley (main axe) to 21t. It may give the same overdrive of the 710 (about 1.5%)
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Old 10-04-2006, 03:46 PM   #1464
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Quote:
Originally Posted by Winner's Circle
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...Too little overdrive to the front or overdrive to the rear causes the car to be very loose in the back coming off of the turn. However, you will have a TON of steering in a power on sweeper...
Hey I noticed that about my 720. In the sweeper at Ft. Myers I can go a lot faster with the 720 than I can with the 710.
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Old 10-04-2006, 09:51 PM   #1465
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Does anyone know where i can get a battery for my 720 and get it in about a week? I need a spare for a race coming up.....
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Old 10-04-2006, 10:01 PM   #1466
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Quote:
Originally Posted by banky71
Does anyone know where i can get a battery for my 720 and get it in about a week? I need a spare for a race coming up.....
I emailed you already I believe.
check your regular e-mail.
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Old 10-04-2006, 11:40 PM   #1467
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Quote:
Originally Posted by eduardo_garcia
The 720 cames with 6% of overdrive. it is a lot for me. I will change the pulley (main axe) to 21t. It may give the same overdrive of the 710 (about 1.5%)
How do you get 6% overdrive?
A 21t pulley on the 2 speed shaft is standard on the 720!

Were you using a 22t on the 2 speed? I can understand your 6% that way!
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Old 10-05-2006, 02:02 AM   #1468
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Quote:
Originally Posted by bigboss
hey guys, just built a new 720
just tidying my electronics up, i was wondering where i stick my on off button??
any help
thanks
I put it on top of the radio plate, above the steering servo. I custom made a 3-way switch which switches between powering the car and connecting to a charge plug. I can charge my car this way without unplugging anything...
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Old 10-05-2006, 04:26 AM   #1469
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Quote:
Originally Posted by banky71
Does anyone know where i can get a battery for my 720 and get it in about a week? I need a spare for a race coming up.....
http://www.promatchracing.com/proddetail.php?prod=7502
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Old 10-05-2006, 05:47 AM   #1470
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Quote:
Originally Posted by bigboss
hey guys, just built a new 720
just tidying my electronics up, i was wondering where i stick my on off button??
any help
thanks
Personal preference but i don't use an on / off switch as it is just something you need to find a spot for and it can fail. I use mini deans connectors on the battery lead and make another short lead to go from the RX to the above the top plate and then just connect the two connectors when I need power. This has never let me down and also means should i be involved in an accident that the track marshall won't accidently turn of my RX.
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