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Old 11-26-2007, 12:38 AM   #1
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Default CO 27 Setup for T4/Offroad

Racing off road on a real tight track, FT T4, IB 4200's. What's a good brush/spring combo to run on this motor, that'll produce some good torque down low and still have some rpm's?
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Old 11-26-2007, 11:17 AM   #2
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purple springs allround is what i ran last time i ran stock.
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Old 11-26-2007, 11:38 AM   #3
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I would recomend purple on the positive and red on the negative with F brushes geared around 17 or 18 with 87 spur. That should get you going pretty well.
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Old 11-26-2007, 06:33 PM   #4
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I have built motor's for a LONG time. Im the ex owner of a company called Velocity Racing.

I am NOT a fan of F brushes when it comes to Truck offroad. Love them in everything else.
I dont think they have the UMPH that Reedy 767's have.
Purple springs while GREAT on sedan's are OVERKILL on offroad.

Truck-Red springs both sides with Reedy 767's.
If the track is VERY tight with alot of 180's then MAYBE you would go a Purple on + and a Red on -.
Gear the truck 87/17-18 and see which one is best for THAT motor.
Every motor is different.

Les
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Old 11-30-2007, 08:15 AM   #5
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Les hit the nail on the head. Red + Red - is the starting point you want. If you need more RPM (Like if your track has some good straights..) Go to a Purple + Red -, But if got got a technical track with alot slowdown 180's, drive around the corner and pumch it to make the double/triples, I would go with a Red + Green -

Harder=RPM
Softer=Torque

There is a tradeoff going each way, Red Red is the Normal

I like 767's.. seem to get faster as the brush total face to the comm and the serations are gone. even though people like to change them if the serations are gone... i dunno why. Just dont make them go purple!

F brushes are good, I never ran a brushed offroad longer enough to see a difference... F brush serations do last longer though...
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Old 11-30-2007, 08:46 AM   #6
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No offense, but for me the purple/red combo is the ticket. I run that on my co and am never out motored at my local track. And that is NOT with the best hand picked motors either. All of my local drivers that come to me for motor help can't believe the difference it makes after I'm done.
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Old 12-02-2007, 01:07 PM   #7
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reedy brushes and the purple red combo = perfection
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Old 12-02-2007, 03:32 PM   #8
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Racing off road on a tight track with a 100' straight, TK B4, IB 4200's.
<< Notice the changes >>

I race a B4 with a Axiom CO27 (blueprint) with the info from this thread, I changed from the stock springs to "Red" both! One word for how the B4 ran!!


SWEET!!!!!!!!!!!!!!!!!!!!!!!!

The guy who beat me last night (12/1) had a 15x2 in his B4 and he couldn't out run me on the straight. He beat me cause he's a better driver NOT his motor!!!

Thanks!!!!!!!!!!!!!!!!
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Old 12-05-2007, 04:28 PM   #9
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I personally run red - and purple + on a bigger track for truck, if its a tight track I run a black - and red +

I typically always run Fbrushes
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Old 12-05-2007, 07:33 PM   #10
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hey dave , never seen a black spring , tell me more , thanks ray
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Old 12-05-2007, 07:34 PM   #11
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Its in between a Green and Red
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Old 12-05-2007, 07:37 PM   #12
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you stockum ? ray
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Old 12-05-2007, 07:45 PM   #13
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Yes and no.

Yes I have them, but not for sale on my site.. If anyone wants them just order whatever color spring and in the checkout notes put Black Spring
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Old 12-06-2007, 10:57 AM   #14
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thanks dave , ray
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