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Old 05-16-2009, 01:23 PM   #1
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Default RC8T upgrades?

K guys, right now I"m running a totally stock RTR RC8T

Ive only raced it twice and came in 2nd each time. I've noticed it seems my Revo actually turns better/sharper then the associated.

What should be upgraded to make this thing really race ready.

Should I change steering servos to see if I can't get this thing to turn sharper? Maybe change the steering arm or put some super strong servo in? Maybe change the pipe to get some low end? I'm new to racing and not sure what needs to be done

Also after each race I always have to tighten my servo saver and its always 3 or 4 turns loose, what would cause that?

Help me!!

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Old 05-16-2009, 03:43 PM   #2
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for the steering servo hitec 7955 & it comes w/ a (long,thick )servo horn that you can use it for more steering throw ,use blue loctite on the servo saver , all metal contact use blue loctite..........if you change the stock .28 motor it will be great
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Old 05-16-2009, 04:05 PM   #3
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7955 is a little weak for it, i have it in my steering, and i wish i had alot more torque.
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Old 05-16-2009, 04:17 PM   #4
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Quote:
Originally Posted by mbx5rcr34 View Post
for the steering servo hitec 7955 & it comes w/ a (long,thick )servo horn that you can use it for more steering throw ,use blue loctite on the servo saver , all metal contact use blue loctite..........if you change the stock .28 motor it will be great
which motor should i switch to?

and what servo would you go with beginner?

And did you just leave the throttle servo alone or change it up as well?
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Old 05-16-2009, 04:23 PM   #5
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+1 on the 7995. As far as not being strong enough, you must be trying to turn army tank. The Hitec TG servos are by far the best jmho... My JR 9100's have developed tons of play and they are about a year newer. The Hitecs are indestructable.
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Old 05-16-2009, 05:38 PM   #6
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if your on the budget you can start from the nova. 21 bf & you match it w/ 086 pipe (total less than $210) ,but if you got the $$$ i would say mugen jx21 or the vspec 21 both can use the os 2050 pipe, hitec servos for me 4 yrs of racing i have 0 issue & customer service are great as well ........you can try hitec 7985 th/brke, 7955 strnng hope it helps...............i understand that you r beginner ,the reason i mention the "budget thing" cause why spend on the cheaper parts/item etc. while you can afford to buy a better quality one & good warranty
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Old 05-17-2009, 04:38 AM   #7
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We've got a new racer at our track that just picked up a new RC8T RS.It seems to turn and handle our track pretty well but it deffinately needs a better pipe.The stock one looks so tiny..specially for a .28
If there's nothing wrong with the stock motor..why change it?Personally I'd just get a good pipe for now...then again my r/c budget is pretty small right now
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Old 05-17-2009, 06:11 AM   #8
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Quote:
Originally Posted by beginner4life View Post
7955 is a little weak for it, i have it in my steering, and i wish i had alot more torque.
Will you must have something setup wrong, that servo should be plenty for any truggy. Grab me next time we're up at NRC and I'll have a look for you.
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Old 05-17-2009, 12:18 PM   #9
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You just need to play with your setup as far as the steering goes. The stock diff setups are 7k-f/7k-c/7k-r, this creates a terrible on-power push that drove me nuts! Try something like 7/7/5 or 5/7/3, something along those lines. Also, try adding a little bit of toe-out on the front tires, that helped me alot. It's all in the setup.
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Old 05-17-2009, 01:57 PM   #10
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Hey Trimble

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Old 05-17-2009, 10:15 PM   #11
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also right now i'm just running the AA battery pack.

Would running a lipo help out as far as power of the servos?
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Old 05-18-2009, 12:24 AM   #12
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- Run more toe-out in front.
- More caster in front
- 3k diff oil in the rear (so you run 7/7/3, which is IMO great)

Change your pipe (I don't know the engine, I have a RC8T FT) to a better one as mentioned above. You can also use a longer servo horn and cut a little bit of your caster blocks in front so your servo can 'throw' more.

LiPo is really great but a expensive investment. I run LiPo's during summer and Nimh during the winter (LiPo's dont like cold weather ) and can run with one package a whole day.
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Old 05-18-2009, 02:24 AM   #13
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justint22, i hav been using the 2700 ballistic batt.,so far no problem i visit the track once a week & i can run all day long ,during race day 2 (5 mins. heat) ,main 7 mins. i dont even need to bother the charger lol .............. its up to you if you want to go lipo route
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Old 05-18-2009, 02:26 AM   #14
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hitec 7955 can do the job mfrosty is right ,i would say even for da crawlers peeps are using this servo
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Old 05-25-2009, 09:36 PM   #15
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Default set up

Id change the tire set up before i go buy another servo. or the suspension set up my rc8t pushed in the corners i changed the front hingepin and kick up bushings to 2up 2up and 1 in the front.
i used 7k 10k and 7k with 45 wt shock oil. and this helped alot!!
our track is med traction and loamy and huge!!!
if that dont help just keep messing with the diff oils.
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