Ofna Ultra GTP2e
#2086
I'll have mine these coming Monday or Tuesday, can't wait to get my hands on. I'm done wasting money on a GT8 conversion pretend to be GT8 lol its time to step up and joined with the big boys. I need to read more on these thread to know the car better, only 139 pages lol.
#2087
How do you remove the rear hinge pin from the hubs? The arms appears to have a round molded area on the arm and one cannot remove the pin. I want to move the rear arm spacers to the front of the rear arm for more traction. Any thoughts?
#2088
Tech Adept
iTrader: (10)
Ultra high speed stability is based more on the aerodynamics of the body than anything else.
141 MPH Speed Run Ofna GTP-2
https://www.youtube.com/watch?v=kF0eyPkE0b8
141 MPH Speed Run Ofna GTP-2
https://www.youtube.com/watch?v=kF0eyPkE0b8
#2089
#2090
Tech Rookie
motor mount plate
Where did you get that motor mount from? I'm trying to put a 29 pinion gear on but I ran out of space on my motor plate. I like what you have.
This is the Dragrace setup. It's either a Hacker or Plettenberg motor. About 2.5 seconds in 132ft.
http://www.youtube.com/watch?v=5jXtBV1t0Is
http://www.youtube.com/watch?v=SXVX4OGcxlA
http://www.youtube.com/watch?v=5jXtBV1t0Is
http://www.youtube.com/watch?v=SXVX4OGcxlA
#2091
Tech Rookie
Where did you get that motor mount plate? I tried putting a 29 spur gear but ran out of room on my plate.
#2092
Tech Addict
DIFF FLUIDS/OIL/GREASE
What diff fluids/oil/grease comes stock in the front and rear diffs of the GTP2E? Are they the same? The manual only says "Put the diff. oil approx 80%"" for front and rear. Thanks in advance RCTECH!
Last edited by tc4basher; 03-23-2015 at 06:05 PM.
#2093
Tech Adept
Is Johnracerx still alive?
My fastest speed from yesterday...
https://www.youtube.com/watch?v=vcdRzkzjEXw
My fastest speed from yesterday...
https://www.youtube.com/watch?v=vcdRzkzjEXw
#2094
Tech Addict
Is Johnracerx still alive?
My fastest speed from yesterday...
https://www.youtube.com/watch?v=vcdRzkzjEXw
My fastest speed from yesterday...
https://www.youtube.com/watch?v=vcdRzkzjEXw
I hope Johnracerx is still alive. haha
#2095
Tech Addict
PLEASE HELP!! Worn out diff cases
Hi rctech!! I am having a major problem with constantly wearing out diff cases where the pinion goes through. The diff cups eventually start getting wobbly and comes out of the diff. I bash my GTP2E every day and usually do speed runs on the weekends so it gets a lot of hard usage. Do I need to shim the diff pinion tighter to the bevel gear on my diff? I usually have to replace the diff case about every 2 wks! This is getting rediculous! Please help!!
#2096
Tech Champion
iTrader: (33)
Hi rctech!! I am having a major problem with constantly wearing out diff cases where the pinion goes through. The diff cups eventually start getting wobbly and comes out of the diff. I bash my GTP2E every day and usually do speed runs on the weekends so it gets a lot of hard usage. Do I need to shim the diff pinion tighter to the bevel gear on my diff? I usually have to replace the diff case about every 2 wks! This is getting rediculous! Please help!!
Worn/seized bearings?
Have you balanced your wheels?
There's no reason why your diff cases should get wobbly like that unless you've got other worn parts that need to be replaced or maintained
*** Edit
It almost looks like you're referencing the center drive shaft?
Is it the front or rear center out drive that's wearing?
Do you have a center spool?
What are your diffs filled with?
You could be overloading your diff and causing the bearing to overheat and melt the plastic
#2097
Tech Addict
Do you have bent drive shafts?
Worn/seized bearings?
Have you balanced your wheels?
There's no reason why your diff cases should get wobbly like that unless you've got other worn parts that need to be replaced or maintained
*** Edit
It almost looks like you're referencing the center drive shaft?
Is it the front or rear center out drive that's wearing?
Do you have a center spool?
What are your diffs filled with?
You could be overloading your diff and causing the bearing to overheat and melt the plastic
Worn/seized bearings?
Have you balanced your wheels?
There's no reason why your diff cases should get wobbly like that unless you've got other worn parts that need to be replaced or maintained
*** Edit
It almost looks like you're referencing the center drive shaft?
Is it the front or rear center out drive that's wearing?
Do you have a center spool?
What are your diffs filled with?
You could be overloading your diff and causing the bearing to overheat and melt the plastic
My drive shafts are straight and bearings are good. I maintain them pretty well and replace them every 2-4 wks. I run strictly on GRP tires but never balance them.
These pics are of the rear diff but the same exact thing happens to the front.
I am running a center spool. Front diff and rear diffs are stock(front oil, rear grease). I have tried 50k in the front diff but same thing happens.
How do I know if I am overloading my diffs?
My setup is: Castle 2200kv, MMM, Turnigy Heavy duty Lipos 6s 60-120c, 3000, 4000, 5000mah. Gearing is usually 38/27 for bashing and 38/34 for speed runs.
#2098
Tech Champion
iTrader: (33)
Since you have a center spool, I don't think you can overload your diffs... if you were running a center diff and it was low on fluid, then it's possible for the front diff to burn out and spin faster than the rear which could cause overheating and melt the plastic.
Are you applying a thin coat of grease on the bevel and crown gears in the diff? It's possible that you might have too much grease packed in there too which can cause excessive binding and heat up. I would also check the backlash between those gears and remove a spacer if it's too tight.... also add a spacer if it's too loose.... everything should fit like a glove when assembled.
Something is causing excessive heat to build up
Are you applying a thin coat of grease on the bevel and crown gears in the diff? It's possible that you might have too much grease packed in there too which can cause excessive binding and heat up. I would also check the backlash between those gears and remove a spacer if it's too tight.... also add a spacer if it's too loose.... everything should fit like a glove when assembled.
Something is causing excessive heat to build up
#2099
Tech Addict
Since you have a center spool, I don't think you can overload your diffs... if you were running a center diff and it was low on fluid, then it's possible for the front diff to burn out and spin faster than the rear which could cause overheating and melt the plastic.
Are you applying a thin coat of grease on the bevel and crown gears in the diff? It's possible that you might have too much grease packed in there too which can cause excessive binding and heat up. I would also check the backlash between those gears and remove a spacer if it's too tight.... also add a spacer if it's too loose.... everything should fit like a glove when assembled.
Something is causing excessive heat to build up
Are you applying a thin coat of grease on the bevel and crown gears in the diff? It's possible that you might have too much grease packed in there too which can cause excessive binding and heat up. I would also check the backlash between those gears and remove a spacer if it's too tight.... also add a spacer if it's too loose.... everything should fit like a glove when assembled.
Something is causing excessive heat to build up
I love my GTP2E but this is issue is becoming a deal breaker since the car has recently become discontinued and spare parts are becoming scarce.