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Old 01-27-2005, 12:03 PM   #2041
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Default sirio .12 crank

djk,

I wish I could fix the threaded section. Unfortunately, it is all one piece. Once the thread is gone, it is gone. Cannot glue some more. I tried JB Weld on the entire assembly, and it only lasted one race . Take care.

Ruben
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Old 01-27-2005, 12:17 PM   #2042
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Wow. Only a 25-30 minute break in? That is too good to be true. I thought I'd be running 10 tanks through this this. But shouldn't I take it easy and keep from pinning the throttle for the first few tanks or so after the break in?

Quote:
Originally posted by Aaron Waldron
Pardon the broken engrish..I didn't type this

From the very 1st time you start your engine, plop the car on the
ground & begin running it in a parking lot in 2-3 minute intervals,
tuned only *slightly rich* getting the temps up in the 200F range on a
normal day. Every 2-3 minutes, shut the engine down & let it cool
completely with the piston at BDC, and then fire it back up; continue
this cycle until you've run 15 min or so, and then bump up to 3-4
minute intervals. Vary the RPM and don't be afraid to get the temps
in the 200's. What you want is heat cycling of the components without
the incredible stress that comes with breaking an engine in when it's
overly rich & cold. After cycling the engine in this manner for about
20-25 total minutes, it'll be ready for the track and race tuning.

It's all about helping the newbies..without you guys, we wouldn't have a hobby!
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Old 01-27-2005, 01:02 PM   #2043
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Cool, That is a bummer.

Last edited by Orange; 01-28-2005 at 10:42 AM.
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Old 01-27-2005, 02:07 PM   #2044
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Here is my broken Rear AD2 arm. I finally got a new one at So Cal so I can start playing with the truck again! Just thought I would share my damage. I am supriesed to hear that this super thick beefy arm is now the week link of the truck!
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Old 01-28-2005, 02:06 AM   #2045
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Hardly a weak point..I haven't heard of a broken one since the three I got when you broke yours!

Sean - If I go, I'll be using some of Losi's entries. I already have a really busy travel schedule..haha.

DJ Normal - I would take it easy for the first 45 minutes or so on your engine..but you'll know when it starts to break in, and it's alright to run it hard around the track; I'd advise against holding it at WOT for any period of time, possibly letting off to 1/2 throttle on the straight.
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Old 01-28-2005, 07:29 AM   #2046
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Quote:
Originally posted by Aaron Waldron
I'd advise against holding it at WOT for any period of time, possibly letting off to 1/2 throttle on the straight.
Even after it's nice and broke in?
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Old 01-28-2005, 08:31 AM   #2047
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I would not say there is anything really "weak" on the truck but have heard of more broken rear arms then anything else so far. Most of them have been related to rear hub screws coming out. I solved that with some 1/2" cap head screws!
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Old 01-28-2005, 08:50 AM   #2048
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Bingo! Stuff like yours was a freak accident..haha.

Normal - After it's fully broken in, then it's alright..but still not a good idea for more than 150 feet or so. It's too hard on the rod.
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Old 01-28-2005, 08:55 AM   #2049
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Did yiou look at the picture. That was a pretty good one right!
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Old 01-28-2005, 10:17 AM   #2050
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Need some help. How would you gear a MF2 with the stock 86 tooth spur gear. Motor would be an Epic 19 turn?
Any advice would be appreciated.

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Old 01-28-2005, 10:31 AM   #2051
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I gear about 2 teeth above stock. I would gear around 19/86 for short track. 20/86 for large track. I have not run my Epic 19T yet but I gear my element 20/86 but it has a full blank arm with more torque then the epic motors. I am not aaron but he usually pawns these questions onto me anyway since he does not run 19T
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Old 01-28-2005, 11:19 AM   #2052
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Thanks for the quick reply Casper. I was going to start with an 18 tooth and go from there.

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Old 01-28-2005, 01:12 PM   #2053
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HeY hEy!!!


Aaron what do you mean by sidebite??? prolly dumb question but i've never really heard of that and is it important, and how do you know when you gain or loose it???? Thanx!!!
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Old 01-28-2005, 02:08 PM   #2054
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Side bite is traction when the truck turns. It keeps the truck from spinning out. Some changes add forward bite to the rear end which helps with accleration and others give you more side bite which keep the truck from spinning in the corners. Too much side bite will keep the truck from rotating though and can cause a push.
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Old 01-28-2005, 02:24 PM   #2055
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HeY hEy!!!



Thanx casper i understand now, it's just that not many people are worried about it out where i race unless they just don't mention it.
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