For stock 17.5 Stadium Truck, medium traction (clay), Trinity D4 Maxzilla (normal, not certified) or Fantom 17.5 Turn FR-1 Spec Edition with ROAR Legal High Torque rotor?

The Maxzilla is about $85 after Tower's discount while the Fantom is about $87. Hence why I'm comparing these two.

I have some questions about the numbers on the certified sticker...

What are some good numbers for a 17.5 1s D4? For example the Rotor + and - are 3335 and 3338. what are those numbers referring too and are they good?

Here's wat I got for a 17.5 1S D4:

IR: 20.8, 20.8, 20.8

Rotor: +3335, -3338

RPM: low 6918, and high 24817
1.4 and 7.4

I know the very basics, but not having a reference these mean very little to me. Could someone break down each number and how they compare to other motors?

IR: 20.8, 20.8, 20.8 <--- 17.5 IR, very good match, lower IR lower the wind.
Rotor: +3335, -3338 <--- Rotor tolerance within 0003, very good
RPM: lowest rpm 6918 <-- 1.4 amp draw
high rpm 24817 <-- 7.4 amp draw

Don't know how these numbers work toward other make and models, because I have never seen these numbers published on another motor. They maybe available but I have never seen them personally.

I can tell you from my experience of Trinity motors this is a very good motor.

I've looked around and the numbers do seem good.

This Trinity motor seems a LOT better than my Reedy mach 3 1S 17.5. The Trinity has a torque punch that the Reedy doesn't have and it runs VASTLY cooler by about 15-30 degrees depending on outside temp - and that's with a higher motor timing on the Trinity.

I have found Reedy's to be good, but lack the punch of a trinity. Someone said that people wanted a smoother performing motor and Reedy designed their motors to be smooth. Where as Trinity is raw power, which I prefer.

Do the certified motors come with the timing set to the best option?

Mine came with the timing set to about 59 degrees. I took it down to 48 degrees for my first day, and I plan on bumping it up in practice and checking temps this week. At 48 degrees it ran 128-130 in five minute heats. I was happy with the performance, but experimenting will be something more to test.

When I talked to the Trinity techs before, they said yes the timing was set to the best for that motor. Normally for 2WD.

The reedy 1s has only a 12.2 rotor. D4 has 12.5. Reedy was nice with the 12.5 but at 40 more bucks not worth it.

Hi there,

I've just picked up a D4 17.5 to run in blinky TC. I was wondering if anyone can offer me some guidance on timing. I haven't got a motor analyser so going by the endbell markigs.

I've had a play looking at rpm vs timing and way quite surprised by the variation from 50 deg (~20k rpm) to 60 deg (~32k rpm) for the motor in the car without wheels.

I was going to start at around 50 deg on the endbell and then adjust to temperature- can anyone comment on whether this is about right to their experiences?

Cheers
Dan

I'm running a D4 6.5T and a Trinity 24K 6.5T on the way.

The D4 17.5 is so popular. If I were to get one, which is the best?

I feel like 17.5 would be really slow... I like the power of a MOD motor. Some one help me understand more.

I'm using it in a RB6.

Thanks.

the 17.5 is definetly slower than your 6.5. The readon for running a 17.5 is to race stock class.

For what it's worth, Kevin told me they never test the sensors on their motors. I got 2 bad sensors & he said they would adjust them to work properly, for a fee of course. Seems like Trinity Sensor boards are a shot in the dark. Really bad quality control.

Running certified trinity short stack. I've heard gear 1 to 2 teeth down for more torque since its an Rpm motor. Did that at 72/29 on medium large flowy indoor clay track. Tining at 50. Was not impressed but motor came off warm to the touch. I could hold my finger on it for a long while so didn't monitor the temps. My Xray xb2 has basically the same drive ratio as the b5m ... 2.65

keep adding timing. trinity motors are notorious for not having accurate timing marks on the can. initially i'd bump it up to 55 and temp it. if temps are still good, don't be afraid to run it up to 60 degrees on the can (of course while monitoring temps).

Hey fellas,

Just got done putting in a D4 SS 1S in my sons's SC10RS. Can anyone suggest what is a suitable spur/pinion to use? No plans at the moment to race. Just for casual play and bashing around. Thanks in advance.