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Old 01-07-2007, 08:36 PM   #31
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Some interesting information...

At the Novak Fred Kellner turned a 12.1 with a brushed motor. (Yes, legal - armature was teched for timing)

I didn't see anyone with a 13.5 turn under that the entire time.

TQ for for 13.5 and Brushed Stock Rubber where both 25 lap runs.
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Old 01-07-2007, 08:42 PM   #32
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Did they run sintered or bonded magnets? With the bonded mag a 13.5 is about the same as stock. With a sinterd mag a 13.5 is quite a bit faster.
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Old 01-07-2007, 08:48 PM   #33
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I'm 99.9% sure Lee Passehl had the sintered rotor. (TQ)

They were selling the 13.5 at the Novak with the sintered rotor pre-installed at a hell of a good price. ($75)

So I'm willing to bet a majority of the field either already had them, or picked them up there.
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Old 01-07-2007, 08:52 PM   #34
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I stand corrected!

Just sorted through the some races.

11.998 - Lee P.

12.0xx - Mike Nelson

TQ for each was only off by 2 seconds. (13.5 being faster)
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Old 01-07-2007, 09:57 PM   #35
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Quote:
Originally Posted by POOKYT
Grizz and others.....

How are you guys combating the lack of "cogging"? Can there be any drag brake dialed in to give the same feel as a brushed motor or close to it? Good Luck in the mains today Grizz!

Brant
Still haven't fully worked that out(so I'm still overshooting corners too much), but adding the right amount of drag brake in the GTB should help(just didn't have time to experiment with that), & just a little FYI, you can tell there's some cogging with the sintered rotor, but not with the original one(& the sintered one can handle a lot more heat, so you can gear it to the moon, Bob Novak told me today he'd been tryinf FDR's as tall as 3.9:1 on his car, & reported no problems, motor just kees pulling). Again, I'm not saying the 13.5 will deliver better laps, only saying it's faster(& trust me, I know from my own experience, not what one guy told another guy).....
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Old 01-07-2007, 09:59 PM   #36
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Quote:
Originally Posted by XMSRacing
I'm 99.9% sure Lee Passehl had the sintered rotor. (TQ)

They were selling the 13.5 at the Novak with the sintered rotor pre-installed at a hell of a good price. ($75)

So I'm willing to bet a majority of the field either already had them, or picked them up there.
And you'd be right, all the guys I know of used the sintered rotor(myself included).....
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Old 01-08-2007, 07:55 AM   #37
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The lack of cogging is not a problem. You just have to change your driving style and learn to start using brakes.

You could program your speedo to have drag brake to simulate a brushed motor but guys that do not do this and learn to use brakes will eat you alive entering corners.

The guys that run 19T and Mod already do this.

FYI, after setting up your speedo go into your radio's brake endpoint (EPA or ATV) setting and reduce the brake endpoint so that the brakes slow your car smoothly. At full strength with a sintered rotor you can lock up your tires and this will get your car out of shape not to mention loose all your corner speed.
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Old 01-08-2007, 08:35 AM   #38
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Default Cogging

Got to mention your using a lot larger pinions which helps the car roll even more...
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Old 01-08-2007, 10:52 AM   #39
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I've been running the 13.5 since they came out. If you set the drag brake at about 7 (out of ten on the gtb) it works about the same as the co27.Thats with the sintered rotor.
Hope this helps
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Old 01-08-2007, 12:18 PM   #40
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Check out the Novak Race brushless A main lap times verses the brushed A main times... the brushless times were a couple tenths faster. I was there and pitted across from a guy who ran the A in both classes... same car... same tires.... same track.... no contest, the brushless was faster... but the Novak allowed the sintered rotor.
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Old 01-08-2007, 12:21 PM   #41
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I wonder if the 13.5 would have been faster without the stock motor timing tech that was going on? :-D
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Old 01-08-2007, 02:46 PM   #42
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The 13.5 is at least 3-4 tenths faster on a track the size of trackside.
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