R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 02-07-2011, 03:31 PM   #1
Tech Initiate
 
Join Date: Feb 2011
Location: Perth, Australia
Posts: 25
Default upgrade engine

I have a jato 3.3 and upgraded just about every part known, now with the extra weight its its not the wheelie machine it used to be. can someone tell me is there a more powerful engine then the trx 3.3 that will fit in the jato???
Rupert 82 is offline   Reply With Quote
Old 02-07-2011, 04:09 PM   #2
Tech Regular
 
Midwest_Mudder's Avatar
 
Join Date: Feb 2011
Location: Kennard, NE
Posts: 438
Trader Rating: 6 (100%+)
Default

If you want a lot of torque cant ya just swap the ratios out instead of buying another full motor?
__________________
First in.... Last Out. Interior Rescue
I can barely keep track anymore....
Midwest_Mudder is offline   Reply With Quote
Old 02-07-2011, 06:14 PM   #3
Tech Apprentice
 
Join Date: Feb 2011
Posts: 81
Trader Rating: 3 (100%+)
Default

Maybe its your motor. I just put a bunch of aluminum parts on today. Pretty much everything except the top plate chasis and added a roll bar. Still pulling wheelies with ease
cr8ter is offline   Reply With Quote
Old 02-08-2011, 02:22 PM   #4
Tech Initiate
 
Join Date: Feb 2011
Location: Perth, Australia
Posts: 25
Default

ok i'll try different ratios, thanks for the response
Rupert 82 is offline   Reply With Quote
Old 02-08-2011, 02:50 PM   #5
Tech Regular
 
Midwest_Mudder's Avatar
 
Join Date: Feb 2011
Location: Kennard, NE
Posts: 438
Trader Rating: 6 (100%+)
Default

I'm not a well rounded R/C guy, but in Drag Racing and Stock Car Racing, we use ratios to adjust torque/top speed. The closer you bring the ratio to 1:1 the higher the top speed, you stray from that one way or the other and you'll gain top speed and lose torque, or gain torque and lose top speed. Im sure someone on here has a nice write up for the different ratios. Ill see what i can dig up for you, but im assuming you probably had a different gear ratio before you changed your motor, if not the motor could have a different "profile" than your older motor. Proper ratios can make all the difference in the world.
__________________
First in.... Last Out. Interior Rescue
I can barely keep track anymore....
Midwest_Mudder is offline   Reply With Quote
Old 02-08-2011, 07:05 PM   #6
Tech Apprentice
 
Join Date: Feb 2011
Posts: 81
Trader Rating: 3 (100%+)
Default

mine is stick gearing. adjust your slipper clutch to max traction if u havent already. mine is adjusted all the way in and then half turn out. Also my engine is tuned to race settings which is right on the borderline of too lean
cr8ter is offline   Reply With Quote
Old 02-08-2011, 07:14 PM   #7
Tech Regular
 
Midwest_Mudder's Avatar
 
Join Date: Feb 2011
Location: Kennard, NE
Posts: 438
Trader Rating: 6 (100%+)
Default

he also swapped out the motor, im doubting it'd be his clutch, he says it wont pop wheelies, not that its slipping. im thinkin he needs a different gear ratio. maybe a slightly smaller pinion gear, or a slightly larger drive gear. My wording may be off, but thats what it sounds like he needs. basically smaller gear coming off the motor, larger gear on the axle, itll provide more torque because the motor will have to turn more times to make the axle turn once, thats an increase in torque for sure.
__________________
First in.... Last Out. Interior Rescue
I can barely keep track anymore....
Midwest_Mudder is offline   Reply With Quote
Old 02-08-2011, 07:37 PM   #8
Tech Elite
 
Join Date: Sep 2001
Location: Newville,Pa
Posts: 2,152
Trader Rating: 7 (100%+)
Default

he never said he swaped the engine..... he's looking for a more powerful engine...
IMPACTPLAYR is offline   Reply With Quote
Old 02-08-2011, 08:22 PM   #9
Tech Apprentice
 
Join Date: Feb 2011
Posts: 81
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by IMPACTPLAYR View Post
he never said he swaped the engine..... he's looking for a more powerful engine...
Ty. Thats what I was going to say. And as for the slipper clutch it is loosen or tighten for traction. Maybe he has it on the looses setting so it is not grabbing all the power from the motor. Yes I think u can put the ofna picco .26 max in it. It will work in the revos and tmaxx so I would think it would work in the jato as well, but not positive
cr8ter is offline   Reply With Quote
Old 02-08-2011, 10:28 PM   #10
Tech Regular
 
Midwest_Mudder's Avatar
 
Join Date: Feb 2011
Location: Kennard, NE
Posts: 438
Trader Rating: 6 (100%+)
Default

Musta read it wrong, thought it said "upgraded everything including more powerful motor"... still, with that being said, my idea of a different gearing setup is valid. If he changed nothing else other than weight, changing gears up would be beneficial.
__________________
First in.... Last Out. Interior Rescue
I can barely keep track anymore....
Midwest_Mudder is offline   Reply With Quote
Old 02-08-2011, 11:02 PM   #11
Tech Apprentice
 
Join Date: Feb 2011
Posts: 81
Trader Rating: 3 (100%+)
Default

You right changing gear ratio would def. Help, but my motor is the same with stock gearing and everything on my car is alu. So if I can still ride wheelies than his should also be able to without changing gearing. I'm just saying
cr8ter is offline   Reply With Quote
Old 02-08-2011, 11:11 PM   #12
Tech Regular
 
Midwest_Mudder's Avatar
 
Join Date: Feb 2011
Location: Kennard, NE
Posts: 438
Trader Rating: 6 (100%+)
Default

Again ill say, im not real rounded in the rc world lol.

But, wouldnt there be other clues that his clutch was slipping too much? The old go kart my brother had use a clutch that worked on the same principle as whats in these cars, as they would get older and worn out you would notice really high revs till it grabbed hold then really slowly gaining speed. So that leads me to wonder if his is slipping, or if its a gearing issue, both are viable options the more i think of it. If its gearing it would be more of a bog, like a car in second gear from stop, if its slipping wouldn't it rev, begin to move, and then pick up speed? Again, all of my current experience is with full size motors, and such, so i could be WAY off.
__________________
First in.... Last Out. Interior Rescue
I can barely keep track anymore....
Midwest_Mudder is offline   Reply With Quote
Old 02-09-2011, 08:06 AM   #13
Tech Apprentice
 
Join Date: Feb 2011
Posts: 81
Trader Rating: 3 (100%+)
Default

It would seem like the motor would rev higher with the slipper adjusted further out but I am not sure on that cuz when i adjust mine it is not even noticeable when it comes to the rev of the engine. I do however notice how fast it picks up speed when it is adjusted tighter tho. Just my experience with it.
cr8ter is offline   Reply With Quote
Old 02-11-2011, 05:36 PM   #14
Tech Initiate
 
Join Date: Feb 2011
Location: Perth, Australia
Posts: 25
Default

i didnt change motor i just went on a spending spree and bought all new alu bits and the weight has definitely increased, i tightened up the slipper and leaned it out as much as poss before running too hot. i'l get some different ratio gears,
Rupert 82 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Houstons Engine Service H.E.S. houston Offroad Nitro Engine Forum 8821 06-17-2017 12:29 PM
The New Werks B5 .21 Racing Engine Werks Offroad Nitro Engine Forum 9300 03-27-2017 05:54 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:46 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net