Ofna Ultra GTP2e
#2056
Tech Champion
iTrader: (33)
I experimented with swapping relatively new packs out and still got the same problematic results. Once I bought a dedicated 4S pack (with matched cells), then all my LVC problems went away
I'll never run packs in series ever again
#2058
Tech Champion
iTrader: (17)
The dual battery setup for the serpent has one major downfall......there is no room and maintenance is a pain in the arse........ I have my gtp2e on the way. I think the quality will be ok...not serpent quality..... But parts are really cheap.....I don't think I will have to worry about parts in the future.....at least one or two years...guessing here.... When a diff goes bad in my gtp2e I will probably just replace the entire diff.....
#2059
Tech Champion
iTrader: (33)
Sweep EXP50's are the tire of choice in my area, however the ROK wheels have proven to be kinda weak when hitting the boards, they will crumble up.
I prefer to mount my tires on OFNA wheels and I buy them unmounted here:
http://www.sweepracingusa.com/18-GT8_c_25.html
I prefer to mount my tires on OFNA wheels and I buy them unmounted here:
http://www.sweepracingusa.com/18-GT8_c_25.html
#2060
Tech Master
iTrader: (50)
Just wanted to give an update on my high speed Late Model. Did some test runs today only running 4s. Gearing is 29t pinion with 36t spur. Motor is a CC 1800kv 1y and esc is a XL2. Tires are GRP.
Speed calc says I'm gearing for 87mph with max voltage lipo, 77mph for 3.7v per cell.
GPS confirmed that I hit 79.1mph in about 600ft which includes a soft start and breaking room. It is a slight down hill, but I think that just makes up for my short running distance.
Did the run several times in both directions. Motor hit 170F with no fan, esc was around 120F and battery was around 100F.
6S should get me close to 120mph and terrified of thinking of 8S which the motor and esc are capable of running.
Speed calc says I'm gearing for 87mph with max voltage lipo, 77mph for 3.7v per cell.
GPS confirmed that I hit 79.1mph in about 600ft which includes a soft start and breaking room. It is a slight down hill, but I think that just makes up for my short running distance.
Did the run several times in both directions. Motor hit 170F with no fan, esc was around 120F and battery was around 100F.
6S should get me close to 120mph and terrified of thinking of 8S which the motor and esc are capable of running.
#2061
I finally got my snr gtp2e going. I went to a world class large rc track (homestead rc speedway--you tube it). They usually run a somewhat short track...about 60 percent of the entire track. To my dismay they were using te long track. I was not eared correctly. I am running te following:
Stock gtp2e with the snr graphite chassis and dm1 front bumper and rear diffuser. Diffs and shock oils were stock.
Turnigy track star motor with a hobbywing fan that is screwed into the diff top plate and is over the motor. Two 2s battery packs...most of the time my 6500 smc's. A hobbywing 150 amp esc. I originally had a 17 tooth pinion in but need more top speed so I put in a 18 tooth pinion. I needed a 20 approx. as the straight is so long and I topped out about 40 percent down it... I was running 25 second laps at first with zero changes to the car. With the new pinion my lap times went down about a half sec on avg. I then started setting ride height and got in the 23.5-24.5 range. My last change was to install firm yellow springs. My corner speed was much better on the sweeper, but my lap times were a little slower. I do not have rear springs yet.... I felt the car had more potential with the more firm yellow fronts. I had to Go after that. I will order some springs for the rear... And will change out the shock oil and Diff oil as well. So much fun...youtube the track.....amazing... Fyi I was worried about heat, but it was never a problem.... I will also gear up as well. Lastly, I will add more anti squat in the future... So much fun....
Stock gtp2e with the snr graphite chassis and dm1 front bumper and rear diffuser. Diffs and shock oils were stock.
Turnigy track star motor with a hobbywing fan that is screwed into the diff top plate and is over the motor. Two 2s battery packs...most of the time my 6500 smc's. A hobbywing 150 amp esc. I originally had a 17 tooth pinion in but need more top speed so I put in a 18 tooth pinion. I needed a 20 approx. as the straight is so long and I topped out about 40 percent down it... I was running 25 second laps at first with zero changes to the car. With the new pinion my lap times went down about a half sec on avg. I then started setting ride height and got in the 23.5-24.5 range. My last change was to install firm yellow springs. My corner speed was much better on the sweeper, but my lap times were a little slower. I do not have rear springs yet.... I felt the car had more potential with the more firm yellow fronts. I had to Go after that. I will order some springs for the rear... And will change out the shock oil and Diff oil as well. So much fun...youtube the track.....amazing... Fyi I was worried about heat, but it was never a problem.... I will also gear up as well. Lastly, I will add more anti squat in the future... So much fun....
#2062
Tech Adept
Just wanted to give an update on my high speed Late Model. Did some test runs today only running 4s. Gearing is 29t pinion with 36t spur. Motor is a CC 1800kv 1y and esc is a XL2. Tires are GRP.
Speed calc says I'm gearing for 87mph with max voltage lipo, 77mph for 3.7v per cell.
GPS confirmed that I hit 79.1mph in about 600ft which includes a soft start and breaking room. It is a slight down hill, but I think that just makes up for my short running distance.
Did the run several times in both directions. Motor hit 170F with no fan, esc was around 120F and battery was around 100F.
6S should get me close to 120mph and terrified of thinking of 8S which the motor and esc are capable of running.
Speed calc says I'm gearing for 87mph with max voltage lipo, 77mph for 3.7v per cell.
GPS confirmed that I hit 79.1mph in about 600ft which includes a soft start and breaking room. It is a slight down hill, but I think that just makes up for my short running distance.
Did the run several times in both directions. Motor hit 170F with no fan, esc was around 120F and battery was around 100F.
6S should get me close to 120mph and terrified of thinking of 8S which the motor and esc are capable of running.
#2064
Tech Adept
#2065
Does anyone have issues with the diff oil leaking out of the diffs? I noticed there is now gasket or anything in the manual. Is is a problem?
#2067
Tech Addict
Largest pinion with stock 51t spur?
I know this question has been asked before but what is the largest pinion that can be used with the stock 51t spur? Never found a definite answer. I'v heard 25T, 26T, 29T......etc. Thanks in advance!
#2068
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
#2069
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
#2070