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Old 12-22-2014, 06:08 PM   #8356
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Default GForce Motor Analyzer

Just got my GFORCE MOTOR analyer and have been playing around with it, but had a few questions. Can anyone advise on good or max #'s for amp draw, RPM, timing and noise.
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Old 12-23-2014, 01:53 PM   #8357
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Just got my GFORCE MOTOR analyer and have been playing around with it, but had a few questions. Can anyone advise on good or max #'s for amp draw, RPM, timing and noise.
Only one I'll comment on is the timing. Used to be a max timing rule for the BOSS motor of 45 degrees. However RobK announced in the USVTA thread he was rescinding that rule as it was outdated (and unenforceable because of issues with the placement of the timing labels). That said the USVTA rule book still has the 45 degree rule in it. My BOSS is timed at 45 degrees (with my motorlyser) and runs great, I'm at a 3.6 FDR and the car runs strong throughout a 12 minute main. Depending on the track, FDRs between 3.6 and 4.0 are common with that timing.
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Old 12-23-2014, 02:29 PM   #8358
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Only one I'll comment on is the timing. Used to be a max timing rule for the BOSS motor of 45 degrees. However RobK announced in the USVTA thread he was rescinding that rule as it was outdated (and unenforceable because of issues with the placement of the timing labels). That said the USVTA rule book still has the 45 degree rule in it. My BOSS is timed at 45 degrees (with my motorlyser) and runs great, I'm at a 3.6 FDR and the car runs strong throughout a 12 minute main. Depending on the track, FDRs between 3.6 and 4.0 are common with that timing.
What is your rpm & amp draw @ 45 degrees?
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Old 12-23-2014, 03:08 PM   #8359
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And being able to set it at 45 degrees (no matter how you get there) does not necessarily mean that's where you should be running the timing on any particular motor. The whole 45 degree thing is often misused and misunderstood.
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Old 12-23-2014, 07:44 PM   #8360
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And being able to set it at 45 degrees (no matter how you get there) does not necessarily mean that's where you should be running the timing on any particular motor. The whole 45 degree thing is often misused and misunderstood.
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Old 12-23-2014, 08:00 PM   #8361
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What do you think of my setup sheet? TC4 VTA on asphalt outdoors. Soda prepped track, very good traction. The front tires wore out real fast, predominantly on the inner 2/3 of the tread so I'll bump the camber down to 2.0*.
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Old 12-23-2014, 08:49 PM   #8362
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What is your rpm & amp draw @ 45 degrees?
Sorry I don't remember off hand and I don't log that information as free revving RPM and AMP draw aren't of much interest to me; I use my dyno for that info.

After seeing two guys (both good drivers) run the same motor in USGT on the same track; one with minimum timing (~30 degrees) the other with max timing (~60 degrees) but different FDRs and have the same lap times, there is nothing magic about 45 degrees. My motor just happens to be very very happy there.

Last edited by John Wallace2; 12-23-2014 at 09:11 PM.
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Old 12-23-2014, 09:07 PM   #8363
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What do you think of my setup sheet? TC4 VTA on asphalt outdoors. Soda prepped track, very good traction. The front tires wore out real fast, predominantly on the inner 2/3 of the tread so I'll bump the camber down to 2.0*.
Sorry I couldn't read your setup sheet (too small or too poor eye sight). What are your front camber and toe settings? And what is "real fast" - two runs two weekends or ?
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Old 12-24-2014, 08:17 AM   #8364
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Sorry I couldn't read your setup sheet (too small or too poor eye sight). What are your front camber and toe settings? And what is "real fast" - two runs two weekends or ?
looks like he's running -2.5* camber and 1* toe

personally, i think the -2.5 is too much.. I usually only use about -1* on my TCXX
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Old 12-24-2014, 08:24 AM   #8365
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looks like he's running -2.5* camber and 1* toe

personally, i think the -2.5 is too much.. I usually only use about -1* on my TCXX
Yea me too, the front caster helps with the camber gain in the turns. But the wear pattern is the same as I get, but my VTA tires last more than 5 or 6 weeks.
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Old 12-24-2014, 09:19 AM   #8366
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What do you think of my setup sheet? TC4 VTA on asphalt outdoors. Soda prepped track, very good traction. The front tires wore out real fast, predominantly on the inner 2/3 of the tread so I'll bump the camber down to 2.0*.
A spool on the front will definitely increase tire wear, especially on asphalt. Try a differential. On our very abrasive track, we see about a factor of two difference in tire life between the two.
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Old 12-26-2014, 03:10 PM   #8367
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Running at Indy RC Raceway tonight. Just a fun evening of club racing. I wanted to see what one of the new RPM blowers would look like so I mounted it to my old Camaro body. It's a really solid unit and held together with 2 hex head bolts through a reinforcing plate underneath the hood. So, 2 small holes through the body is all you need.

Weight seems to be about 20 grams. The edges are rounded from the factory, so I don't believe carpet damage is an issue. Certainly will cause some drag too. But... man it looks cool.

Seems like a car with a blower should do a burnout before racing too.



Update: Better photo with blower on a new body:

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Old 12-27-2014, 06:46 AM   #8368
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Now it needs the Team Associated Ess-One or the Traxxas sound unit out of the Slash.
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Old 12-27-2014, 05:16 PM   #8369
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looking forward to someone using that sound system in VTA
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Old 12-27-2014, 05:56 PM   #8370
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If I can find one in stock somewhere besides Associated and preferably less than full retail, I will be running one soon!
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