View Poll Results: what's your tire choice?
Protoform
46
30.67%
HPI
104
69.33%
Voters: 150. You may not vote on this poll
4318LikesU.S. Vintage Trans-Am Racing Part 2
01-17-2019, 04:09 AM
Tech Master
iTrader: (1)
I will tell you the TSR 25.5 V3 is definitely faster than the original TSR 25.5 which I have been running for over two years. I have two of the new motors and I have run them in testing only. I went from a 3.8 fdr to a 5.05 fdr with the new motor. It was easily .2 /lap faster up front on a mid 11 second track (black carpet) and held its speed since there wasn't much of a hint of heat fade. We made 1 run of 16 minutes and the last lap was 11.6 with a fast of 11.2. Motor temp was around 125 with a fan at 16 minutes and timing was at 52 degrees.
Now it needs to be ROAR approved before I race it and it is in their hands.
It too is about 20g lighter than the old motor.
Now it needs to be ROAR approved before I race it and it is in their hands.
It too is about 20g lighter than the old motor.
01-17-2019, 05:19 AM
Revtech X-Factor 25.5T on the ROAR Approved list...
01-17-2019, 05:23 AM
And that’s all we’ve been waiting for. It’s official now
01-17-2019, 05:30 AM
I will tell you the TSR 25.5 V3 is definitely faster than the original TSR 25.5 which I have been running for over two years. I have two of the new motors and I have run them in testing only. I went from a 3.8 fdr to a 5.05 fdr with the new motor. It was easily .2 /lap faster up front on a mid 11 second track (black carpet) and held its speed since there wasn't much of a hint of heat fade. We made 1 run of 16 minutes and the last lap was 11.6 with a fast of 11.2. Motor temp was around 125 with a fan at 16 minutes and timing was at 52 degrees.
Now it needs to be ROAR approved before I race it and it is in their hands.
It too is about 20g lighter than the old motor.
Now it needs to be ROAR approved before I race it and it is in their hands.
It too is about 20g lighter than the old motor.
That’s HUGE difference in FDR. With just about all motors running 4.0 or less now, why did you even venture into that high of a range? Does the V3 just not produce any torque at all, but have a very high RPM?
01-17-2019, 06:17 AM
Is anybody using a speedzone 25.5? Any help with gearing is much appreciated.
01-17-2019, 06:56 AM
I gear mine by feel and lap times you will have a heartache to know what my fdr is is no where near what you think a 25.5 should be at
01-17-2019, 07:00 AM
01-17-2019, 07:10 AM
01-17-2019, 07:54 AM
I gear mine by feel and temps as well, but there is still a “normal” range. I will use my last race weekend as an example. My car was running great with a 96/50 FDR. Speed, access toon, temps. All good. But I wanted to get just a smidge kite too end on the straigh as I had planet of grunt, so I went up one tooth on the pinion for the main. Bog city. Motor went to crap and got warmer than I like. So if going up one tooth did that, why would I go up several teeth?
Stepping up that high just seems like a big leap unless there was some other indicative information to suggest it.
And out of curiosity, what motor, timing and gearing are you running. (Track type and size is helpful too) Maybe the box we have all been thinking in is wrong and we need to step out of it.
Stepping up that high just seems like a big leap unless there was some other indicative information to suggest it.
And out of curiosity, what motor, timing and gearing are you running. (Track type and size is helpful too) Maybe the box we have all been thinking in is wrong and we need to step out of it.
01-17-2019, 08:16 AM
I gear mine by feel and temps as well, but there is still a “normal” range. I will use my last race weekend as an example. My car was running great with a 96/50 FDR. Speed, access toon, temps. All good. But I wanted to get just a smidge kite too end on the straigh as I had planet of grunt, so I went up one tooth on the pinion for the main. Bog city. Motor went to crap and got warmer than I like. So if going up one tooth did that, why would I go up several teeth?
Stepping up that high just seems like a big leap unless there was some other indicative information to suggest it.
And out of curiosity, what motor, timing and gearing are you running. (Track type and size is helpful too) Maybe the box we have all been thinking in is wrong and we need to step out of it.
Stepping up that high just seems like a big leap unless there was some other indicative information to suggest it.
And out of curiosity, what motor, timing and gearing are you running. (Track type and size is helpful too) Maybe the box we have all been thinking in is wrong and we need to step out of it.
01-17-2019, 08:21 AM
I use to run 4.0-4.2 in 17.5 two years ago.. as an example where I'm at 4.65-4.9 depending on the motor (V16 / V21 R1's,Orca's Blitreme, Trinity Monster max, Team powers V3, TSR 3.0) versus the older Trinity 24K, RTS orca, V2 Team powers, older Reedy, older TSR's etc.
We know you rock with your program but sometimes including myself, didn't venture high enough in FDR to use the higher rpm power band / use ideal and decent amp draw / KV settings at first. You can always make up for torque with gearing, I will take rpm all day. Look at mod.. on a minor scale these spec motors are becoming a mini version with more and more rpm it seems.
My Canadian .02 :P
We know you rock with your program but sometimes including myself, didn't venture high enough in FDR to use the higher rpm power band / use ideal and decent amp draw / KV settings at first. You can always make up for torque with gearing, I will take rpm all day. Look at mod.. on a minor scale these spec motors are becoming a mini version with more and more rpm it seems.
My Canadian .02 :P
Last edited by DaSilva3525; 01-17-2019 at 09:04 AM.
01-18-2019, 05:18 AM
Tech Master
iTrader: (1)
There was a Can-Am motored USGT car on the track at the same time. They were equally matched on the straight. Obviously that car had a corner speed advantage but straight out speed to match was something.
Too bad I can't run it at the Birds (that's why I don't have time to dyno them, Birds prep.)
01-19-2019, 12:53 PM
What are people using for driver figure if cant get the hpi inner body set? I want my ride to be usvta legal
01-19-2019, 01:08 PM
01-19-2019, 01:08 PM
I put mine down on the track, it was fast from the jump but noticed it liked more rpm. I dropped one tooth and holy shit the motor came alive. temps are extremely low like barely 114-120 but i'm keeping it there and not touching it.