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Old 07-29-2008, 03:36 PM   #376
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I have been running my 17.5 in my Pro4 at a 4.2 fdr and it has been temping from high 160's early in the day to 180's when the track temp is at it's hottest.

Do you think I am at an o.k. fdr or should I drop a tooth or 2 to bring the temp down a little?

The motor is still performing the same but just want to keep the temp on the safer side as to not cause a shorter motor life.

Track size is 60' x 60' asphalt parking lot sprayed with juice/water mix.
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Old 07-29-2008, 07:15 PM   #377
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I have been running my 17.5 in my Pro4 at a 4.2 fdr and it has been temping from high 160's early in the day to 180's when the track temp is at it's hottest.

Do you think I am at an o.k. fdr or should I drop a tooth or 2 to bring the temp down a little?

The motor is still performing the same but just want to keep the temp on the safer side as to not cause a shorter motor life.

Track size is 60' x 60' asphalt parking lot sprayed with juice/water mix.
160-180F is fine, If the temperature changes outside the temp of the motor will change as well. If your running in the warmer part of the day you might want to consider gearing down a tooth or so.
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Last edited by kyle478; 07-29-2008 at 08:18 PM.
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Old 07-29-2008, 10:34 PM   #378
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160-180F is fine, If the temperature changes outside the temp of the motor will change as well. If your running in the warmer part of the day you might want to consider gearing down a tooth or so.
Kewl! ThanX for the info/help Kyle.
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Old 08-04-2008, 11:52 PM   #379
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Hello!
What timing do you set for E40 motors on ESC? I was wondering, GM says 30 deg., how much do you propose for 4.5t E40 running rubber on short tracks?
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Old 08-05-2008, 03:00 AM   #380
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Kyle,
Thanks, I'll try the motor timing this weekend and let you know how I get on. Admittedly, I didn't check it out of the box, but I haven't changed it either, I tend to change timing on the speedo rather than the motor.

The track was open and on asphalt (Here's the layout)
I went to the track on Sunday and was planning on running outdoors, but as it was raining, we ended up inside on carpet. I was geared at 6.8 to start with and it came off hot (190), so I geared down to 7 and it came off at 165. That's quite a big jump for one pinion change ? I'd like to stay at 6.8 ish as the car was extremely quick, just need to bring the temp down a bit... the timing on the motor is right in the middle (lined up with tab B) and on my speedo it's set to 0 degrees.
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Old 08-05-2008, 03:40 PM   #381
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Default 13mm rotor?

Does Hacker make a 13mm rotor, or some sort of tuning rotor, like Novak? If not, has anyone tried the Novak 13mm or another rotor in the Hacker?

Thanks
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Old 08-05-2008, 06:56 PM   #382
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What size tires are you guys running. I gear my 17.5 to 3.45 fdr with 58mm tires and come of that track at around 170 degrees. I don't mess with timing either. What is the optimum operating temperature for these motors since I usually gear mine by temp?
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Old 08-05-2008, 07:22 PM   #383
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Originally Posted by chris_dono View Post
the timing on the motor is right in the middle (lined up with tab B) and on my speedo it's set to 0 degrees.
The ring that slides is NOT going to be the exact same on all motors. Loosen the 3 screw on the back and rotate the timing ring counter clockwise then back clockwise. You will get a feel for how much the ring will move then set it just past the mid point in the counterclock direction. This should reduce the heat some if the timing is all the way up now. This should allow you to run the 6.8FDR. 165F is about where you want it.

If this doesnt work you can try going to the mid point in timing on the motor and increase the timing in the ESC to 2-4 degrees. ESC timing is the best way to increase the timing of the motor.
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Old 08-05-2008, 07:26 PM   #384
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Does Hacker make a 13mm rotor, or some sort of tuning rotor, like Novak? If not, has anyone tried the Novak 13mm or another rotor in the Hacker?

Thanks
Yes we do sell a 13MM tuning rotor. If you are using this rotor at a santioned event it will only be allowed in the modified class.

If you need one you can call the office at (480) 726-7519
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Old 08-05-2008, 11:38 PM   #385
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Originally Posted by kyle478 View Post
ESC timing is the best way to increase the timing of the motor.
So which timing do you suggest for 4.5T E40? I cannot find answer anywhere...
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Old 08-06-2008, 05:05 PM   #386
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Yes we do sell a 13MM tuning rotor. If you are using this rotor at a santioned event it will only be allowed in the modified class.

If you need one you can call the office at (480) 726-7519
Does the hacker e40 have replaceable bearings? Also, how does the 13mm affect the motor performance?
Thanks!
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Old 08-06-2008, 06:11 PM   #387
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So which timing do you suggest for 4.5T E40? I cannot find answer anywhere...
2-5 degrees seems to be the norm.
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Old 08-06-2008, 06:16 PM   #388
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Does the hacker e40 have replaceable bearings? Also, how does the 13mm affect the motor performance?
Thanks!
The 13mm rotor should increase the torque and drop the K/V of the motor.
I normally run 1 tooth larger pinion with this rotor.

The E40 does have replaceable bearings. The front bearing is the most exposed on this motor therefor will wear more then the rear. We sell the front bearings and would suggest you send the motor in to our repair department if the rear bearing needs replacing. To replace the rear bearing the motor must be completely disassembled.
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Old 08-06-2008, 11:09 PM   #389
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If someone lives in such a lonely in Hacker dealers country has to ask, what is metric size of this bearing? Are ceramic available?
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Old 08-08-2008, 11:27 AM   #390
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Default What's the difference?

With so many brands of motors out now (although many are by the same OEM), what's the difference between them? They're all pretty much the same as far as I can see. I'm just wondering what I should look at when deciding to go with one motor over another, when they all pretty much have the same specs. I know Hacker have made some great motors (I have a few), but I don't want to go on reputation alone. What distinguishes one motor from another, performance-wise?
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