171 replies to this topic

[MSwiss]

This may have been covered already and if so please be patient.

I finally got some of these motors and did the recommended 15 min.@5v. The track marks on the com looks unchanged from out of the pack. Is this norm?

Anyway, I went to the track to get track time on them but was unable to because no pinions were available. So Eddie Fleming loaned me one of his motors with a pinion and Ill say I loved the motor! Great breaks and lots of punch.

Water break in maybe? Do they really come around that quick with track time?

From the ERI newsletter below, the motor has apparently created (hopefully) a temporary shortage with 11T and 12T pinions.



As far as break-in, I just use the power supply and then either the track or drag strip.

I have heard of one racer, with water break-in, wearing out the brushes in 15 seconds, while I've heard other ones who have used Simple Green which I always thought was like using water on steroids.

Very confusing for a motor whose brushes, according to FB chatter, apparently last 1,800-3,000 laps.

To be safe, I would stick to power supply and track break-in.

[Half Fast]

AFAIK nobody at Port Jeff is using any form of liquid break in on the CR102 and good riddance to that!

 

Cheers

[Eddie Fleming]

Bobby the motor you ran yesterday was broken in for 15 min at 4V then put in a car. It probably had 300 laps on it before you ran it 

[DavidR]

I broke one in using simple green and it only took a few seconds as the brushes must be really soft . Also running a 11/27 in a stock car I have very little brakes. Anyone running different gears in the stock car?

[John Streisguth]

I think I heard most people are running a 10?  Might be wrong.

 

You may want to try breaking in a motor dry, as has been suggested.  Maybe you ate away enough brush material to lose brakes?

[MSwiss]

If the brushes were "soft", racers wouldn't be getting 1,800 - 3,000 laps, with their motors, as mentioned in post #126.

 

Let's just say the composition of the brushes reacts differently to liquid break-in, than what racers are used to.

 

For Stockcars, racers are dropping a tooth with the pinion, going to a 10T, just like they do with the other motor, when they use an 8T, instead of a 9.

[Eddie Fleming]

David I ran laps Saturday with two stock cars. One geared 10/27 and the other at 11/29 Both ran about the same except one kept wanting to roll over and play dead, I don't think the motor had anything to do with that.

 

Both motors were dry break-in and both had good brakes. 

[MSwiss]

Speaking of Stockers, I just checked out the results from the weekly Tuesday night Retro races at Port Jeff.

They ran Stockers this week, with Pat Skeggs winning with 324 laps, and Ed Sohl, right behind with 323.

I went back to the recent Retropalooza Stocker race, to get a comparison.

Chubby won it with 325, with Jimmy Williams Jr. 2nd, with 319.

Ed said Pat was geared 10-27, while he ran 11-28, and toned it down a bit with some choke.

[MSwiss]

I'm "watching" the Can Am at Port Jeff.

Top 5 within 2 laps, after 6 heats.

[MSwiss]

Jimmy finished on Yellow and Orange and pulled away a bit at the end. I like the look of the best lap times among the frontrunners.

[John Luongo]

great facility and good, fast racing with some of the best in the country!

[Half Fast]

John L -- Nice to meet and race with you, glad you liked Port Jeff.

 

For the record I ran 10/27 in Stockcar and 12/27 in CA with the CR102.

 

Cheers

[John Luongo]

great fun! very nice to meet and race with you as well. i think the track made me look like a better driver than i am. yes, i ran 10/27 in stock car as well. 9/26 in my can am with a hawk motor. i like driving slower cars, they handle better lol. be well

[Eddie Fleming]

Just a question or two.

 

Are we seeing a race to the largest pinion? and if so is it the best way to go?

 

I have only run the CR motor on a flattish hill-climb at 14.2 V. They seem to want to run very hot. The heat does not seem to bother them though. I can't say I am seeing any difference in times with a 10 or 11 tooth.

 

What are you finding works for you on shorter flatter tracks?

[John Luongo]

eddie, i am still experimenting with gears and tracks. my port jeff stock car

(10t pinion) will get new axel bearings and a higher numerical crown gear, maybe a 29t if it will clear, for modelvilles race saturday on their american black (royal) run backwards. i will also bring a cr102 motor with a 9t pinion. with a hawk motor, i have used an 8/27/28 gear on that track. its possible that a higher numerical gear ratio would be best for that track. some even ran a 7t pinion with the older motors. i will have to get there early enough to play with gears. best regards

[slotcarone]

John the American Black runs clockwise. When I raced there that was the way we ran. Have they changed directions?

[John Luongo]

John the American Black runs clockwise. When I raced there that was the way we ran. Have they changed directions?

your correct mike, it does run clockwise. down the donut as opposed to up. originally it ran ccw like their king track. it changes the driving and character of the track. it has been this way (cw) for a few years. i still need lots of practice on it. maybe an 8/27 with the cr102 motor. best regards

[John Streisguth]

John, I think you might find gearing that low to be more difficult to drive.  The one time I raced on that track with a GT Coupe, I ran the usual 9/28 gearing against all advice, because i found I could drive the higher gearing smoother.  YMMV...

[crazyphysicsteacher]

Just a question or two.
 
Are we seeing a race to the largest pinion? and if so is it the best way to go?
 
I have only run the CR motor on a flattish hill-climb at 14.2 V. They seem to want to run very hot. The heat does not seem to bother them though. I can't say I am seeing any difference in times with a 10 or 11 tooth.
 
What are you finding works for you on shorter flatter tracks?

Gear it like a normal motor. Gear it to wind out on the second longest straight on the track.

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[John Luongo]

John, I think you might find gearing that low to be more difficult to drive.  The one time I raced on that track with a GT Coupe, I ran the usual 9/28 gearing against all advice, because i found I could drive the higher gearing smoother.  YMMV...

you may be right, john. i havent run the stock car with the new cr motor on that track yet. last stock car race on that track i ran a hawk motor with 8/27. also used a controller with no brakes, an interesting drive. this saturday i will have a controller with working brakes and will take your advice on initial gearing. thanks!

[John Streisguth]

you may be right, john. i havent run the stock car with the new cr motor on that track yet. last stock car race on that track i ran a hawk motor with 8/27. also used a controller with no brakes, an interesting drive. this saturday i will have a controller with working brakes and will take your advice on initial gearing. thanks!

Maybe go with 10/29 or 9/26 to start, see how that feels.  Of the 3 motors I tried at the most recent race at Speedzone, they all "felt" a little different as to the amount of 'punch" they had.  

[Danny Zona]

Just a question or two.
 
Are we seeing a race to the largest pinion? and if so is it the best way to go?
 
I have only run the CR motor on a flattish hill-climb at 14.2 V. They seem to want to run very hot. The heat does not seem to bother them though. I can't say I am seeing any difference in times with a 10 or 11 tooth.
 
What are you finding works for you on shorter flatter tracks?

I'm using an 11 tooth pinion at P1 which is a small flattish hill climb.

I can definitely feel the difference between a 10 tooth and 11 tooth pinion.

I don't see it as a race to the largest pinion but a race to find the optimal gearing that produces fast lap times.


By the way my mule motor is at the 3800 lap ballpark and still going strong. It ripped the fastest lap I ever hit in Canam last night at Fast Eddie's.

[blkdout76]

Had the "not counting laps" happen to mr and one other racer this Saturday at PJ. I think we determined my SC might've been missing laps due to the heavy amount of wiggle/wobble coming out of the bank. The other racer was missing laps in both classes, SC and Can Am. Not sure of it was due tonset up as I didn't get a chance to look at his chassis ride height. But super frustrating on my end after so much time and effort to finish 16th in SC when this was easily a top 10 or 8 car.

[John Streisguth]

Gary, I remember a few years ago that one of the classes had that same counting issue at PJ.  Some of the cars had a nasty "death wobble" out of the bank, and I think that made the braid contact very light (or non-existent) over the dead strip. IIRC, some of them hit the deadman hard because they basically had no brakes from it.   And if you have heavy contact of the front wheels, that probably make the issue worse.  

[Noose]

Gary, I remember a few years ago that one of the classes had that same counting issue at PJ.  Some of the cars had a nasty "death wobble" out of the bank, and I think that made the braid contact very light (or non-existent) over the dead strip. IIRC, some of them hit the deadman hard because they basically had no brakes from it.   And if you have heavy contact of the front wheels, that probably make the issue worse.  

It was only one car in F1 at a Retropalooza. Wiggled like mad.