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Old 03-04-2009, 02:38 PM   #1141
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Thanks for the info guys.

So 13.5 with LIPO 1S is equivalent to 17.5 with NIMH. Good heads up ! I need to get more info from other lipo users on this so we can put forward some kind of rules at the track.

Also look forward in receiving some gearing info and roll out.

Here's what I am thinking:

17.5 BL use 76T spur + 39T pinion to start off with 46.5mm tires. I get 75mm rollout
13.5 BL use 76T spur + 34T pinion to start off with 46.5mm tires. I get 65mm rollout

Check temp for around 150F on motor and adjust gearing.
From what I've read the 1s lipo with 17.5 is slower and the 13.5 is faster than 17.5/nimh, there is no direct equivilent. I just got the SMC lipo to try myself but I think your going to need more gear, on our med track I'm running 76/52-54 and I've been told I'll need a rollout over 90mm for the 1s/17.5
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Old 03-04-2009, 03:20 PM   #1142
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So a small track would be less of a rollout for 1S/17.5 ? Something like maybe 80MM and 42 pinion / 76 spur ?

Wonder if anyone has experience with a 13.5 / 1S setup in a small track. Looking for rollout ?
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Old 03-04-2009, 04:27 PM   #1143
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Here is a quote from EddieM on the rollout for 1s. I dont know how big the track he is running on is but what is clear is that 1s rollouts are huge.

"17.5 drivers are running 100~110mm rollout and 13.5 around 88~96mm."
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Old 03-04-2009, 04:38 PM   #1144
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Oh my God ! That's huge gearing. I think I will be better off just to stick with conventional 4 cell NIMH and a 13.5T brushless motor.

So what would be the rollout in MM for this setup on a small track ?
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Old 03-05-2009, 11:30 AM   #1145
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From what I've read the 1s lipo with 17.5 is slower and the 13.5 is faster than 17.5/nimh, there is no direct equivilent. I just got the SMC lipo to try myself but I think your going to need more gear, on our med track I'm running 76/52-54 and I've been told I'll need a rollout over 90mm for the 1s/17.5
or choice 2 cell Li-Fe 6.6V !
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Old 03-05-2009, 12:20 PM   #1146
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The rollout that you're going to need for 12th is going to vary a lot depending on what speedo you're running.

With a tekin RS at full boost timing I'm around 78mm in 13.5 on a fairly large track. Anything more than that just won't pull on the infield with my set-up.
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Old 03-05-2009, 04:05 PM   #1147
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or choice 2 cell Li-Fe 6.6V !
Totally agree, I have two sets of these and love them. Just as lightweight as the SMC lipo but t-bar freindly.

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The rollout that you're going to need for 12th is going to vary a lot depending on what speedo you're running.

With a tekin RS at full boost timing I'm around 78mm in 13.5 on a fairly large track. Anything more than that just won't pull on the infield with my set-up.
I've read that guys runing tekin with the 189 software have been able to drop up to 6 teeth and run the same lap times, so your right going forward the esc will play an ever more important role in rollout.
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Old 03-06-2009, 02:09 PM   #1148
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Blackstock has posted his Mod and 10.5 set-ups from Snowbirds on the AE site if anyone is interested. Theres a 10R5 one in there too . . .
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Old 03-11-2009, 05:12 PM   #1149
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What size wire gauge you guys using on the 12R5 . I will be running 1S lipo + 17.5 Brusless.
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Old 03-11-2009, 05:41 PM   #1150
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What size wire gauge you guys using on the 12R5 . I will be running 1S lipo + 17.5 Brusless.
OD Purple 16ga
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Old 03-11-2009, 06:19 PM   #1151
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Great thanks
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Old 03-13-2009, 01:42 PM   #1152
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Here's a quick question maybe the Oval guys can help me out ?
I want to use a Novak GTB 4-Cell Competition Brushed/Brushless Electronic Speed Control with my 12R5 1/12 pan car.

Will it work with the SMC 1S lipo and TQ booster ? Do I disable anything for the lipo cutoff because it is 1 cell ?

How about wiring , anything special with this hookup ?

Thanks
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Old 03-14-2009, 06:11 AM   #1153
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If I cut my rear tires to start off at 46.5 mm at what size should I cut my front tires ?
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Old 03-14-2009, 07:44 AM   #1154
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If I cut my rear tires to start off at 46.5 mm at what size should I cut my front tires ?
42-42.5mm should do for the beginning. You should go to your track and ask the fast guys what tire sizes are they using for your track to get more precise details
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Old 03-14-2009, 07:58 AM   #1155
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as most will tell you 46.5 is quite large for a rear tire. But i will start mine at that size for club races. usually the fronts I like them to be 2mm smaller. it seam that any less stager and the car pushes. I would go to a larger stager to add steering, but not much more then 2.5mm.

also if you tend to hit boards, you might want to cut them a little smaller. like say 42 front and 44 rear. just to help reduce chuncking. large tires are easy to chunk.

one more helpful advice is to glue the bead on the tires. expecially the yellow. they tend to chunk quite easily. I have chuncked yellow with no board hits. so I try to ca the bead almost every run just to reduce the chunking.
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