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Best 17.5 brushless motor for off road?

Best 17.5 brushless motor for off road?

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Old 11-17-2008, 09:25 PM
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Most people are running a higher FDR then me. This is a short technical off road track. I went to a 6.6 and it was way peppier but wouldnt rev out on the straight even. So I went back down to whine up more on the straight. Ill go back up. Ive checked my temps and it comes off the track at like 120 after 5 minutes and about 150 after 10
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Old 11-17-2008, 10:48 PM
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Originally Posted by lookiezx-5 View Post
Well i can guarantee that everyone that is fast has a lower fdr. Do you check the temps after each run? You can run a novak upto say 175 before it will go bang. I know some ppl who have a fdr of around 4.0 in a b4!
I run a 4.9 in my B4 with a 17.5 and could even go a little lower fdr on a couple different tracks.

I get better results when you run the motor just alittle on the warm side.
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Old 11-18-2008, 02:23 PM
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i've got the same SP17.5 on my RB5. i geared it at 6.2FDR, cranked up the timing on my RSPro to 100 and it was still a shocker.
i swear, no better than a 540 silvercan and certainly slower than my co27.

if u read the onroad threads, the onroad guys are gearing the 17.5 at crazy FDRs like 3+.

i'm going to try 5.1FDR next time.
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Old 11-18-2008, 03:03 PM
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What pinion and spure size are you using?

Originally Posted by wyl03 View Post
i've got the same SP17.5 on my RB5. i geared it at 6.2FDR, cranked up the timing on my RSPro to 100 and it was still a shocker.
i swear, no better than a 540 silvercan and certainly slower than my co27.

if u read the onroad threads, the onroad guys are gearing the 17.5 at crazy FDRs like 3+.

i'm going to try 5.1FDR next time.
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Old 11-18-2008, 03:23 PM
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was on 76/32. going to try 68/35 soon.
i don't want to lose the slipper too because our tracks are dusty dirt types.
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Old 11-18-2008, 03:33 PM
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When it comes to 17.5's I have ran the SP,Novak and Tekin. The Tekin was the best of those 3. Great Torque and Top Speed.
78/33 is my gearing.
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Old 11-18-2008, 03:45 PM
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denny - the guys recommending 7.5 - was that for brushed motors? Or, they could just be pulling your chain to keep you slow

You gotta gear 13.5 and 17.5 BL motors really high. Even a 10.5 Novak I have in my B4, I've bumped up the pinion size pretty high.

Gear it so you do hit full speed about 3/4 way down the straight. You want corner to corner speed more than top-speed. Racing is won in the corners (typically).
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Old 11-19-2008, 11:34 AM
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I tried 78/28 on the LRP 17.5 and it was a pooch. I could have outrun it down the straight. Plus it got warm. Pushing the 140 range. The Novak had no problems with the same gearing. This was on a T4.
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Old 11-19-2008, 11:36 AM
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Was this on the new lrp or older version? I think Im gonna wait out and get the pulse by trinity. Til then Im going to try and blow this one up gearing it as high as I can!
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Old 11-19-2008, 07:58 PM
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what gearing for a novak 17.5 in a t4 im thinking 31/76?

also do you think the trinity 17.5 duo or the novak 17.5 as a better competitive motor?
thanks
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Old 11-19-2008, 08:11 PM
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Originally Posted by lookiezx-5 View Post
Well I am running a novak 17.5 and my fdr is 5.0. Running a 72 spur, 36 pinion....I am going to put a 38 pinion in it soon as my motor/esc only gets to about 50c. That will give me a fdr of 4.7! You have to run brushless near the limit to get the best out of it. In comparison to the lrp, speed passion etc, I would have to say it is fairly close. No wonder you are getting sluggish performance running @ 6.9 fdr. How hot is your esc/motor getting?
what car mate?
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Old 11-20-2008, 10:08 AM
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I've got 29/78 gearing (6.99 FDR) with a Tekin 17.5 in my T4 at Trackside. I had 30/78 but I had some motor temp after 15 minutes of practice, plus the 29/78 just felt better on track.

Spend your money on practice and tires, not a different 17.5. The Speed Passions that are sold at Trackside work just fine.
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Old 11-20-2008, 10:25 AM
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If you can adjust the timing, crank it all the way up whether its in the esc or on the motor. This makes a big difference and is why I run the tekin RS esc. Adjusting the timing in the esc really brings any motor to life
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Old 11-20-2008, 03:23 PM
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Hey Aaron the tires are new and it gets plenty of traction. It just keeps feeling slower and slower. I dont know if its getting worse or what. Im going to be buyin a new motor regardless. The new Orion Vortex or Trinity Pulse are what Im going with. If that new LRP X12 comes out soon Ill have a real tough choice ahead of me.
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Old 11-20-2008, 03:47 PM
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I ran a 78/32 with a novak 17.5 in the T4 @ the smac track. temp was about 146. it had plenty of power coming out ot the corner and great speed down the straight

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