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Old 01-18-2008, 03:44 PM   #46
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Axiom Jacob and myself both competed in the Roar Region 5 race at Summit Raceway using brushed motors. In a separate class, they ran the 13.5 'stocks'. The laptimes were very close, with the Brushed motors actually having the fastest lap times. Summit is a large outdoor electric track that really requires horsepower. In their outdoor state champs race, the winner and 3rd place finisher was a brushed motor (out of at least 15 drivers). If you are drag racing down a long street, yes, the 13.5 might be quicker, but if you are on a track, the difference is miniscule from what I have seen on various tracks.
Yup this is true. A good stock motor will keep up with a 13.5. I like how roar just tested the brushless in onroad and never tested it on offroad, good move!
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Old 01-18-2008, 04:46 PM   #47
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Yup this is true. A good stock motor will keep up with a 13.5. I like how roar just tested the brushless in onroad and never tested it on offroad, good move!
HAVE YOU TRIED A BRUSHLESS SYSTEM YET SEEMS YOUR CONFUSED!
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Old 01-18-2008, 04:53 PM   #48
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HAVE YOU TRIED A BRUSHLESS SYSTEM YET SEEMS YOUR CONFUSED!
I have TWO of them
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Old 01-18-2008, 06:41 PM   #49
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Seems that the legal ROAR stock for offroad should not be 17.5 or 13.5... one is too fast and one is too slow.

The answer seems too obvious: It needs to be in between... probably 15.5

I liked the idea of putting a stop to the escalating speed of the stock class. But it sounds like the 17.5 may be a bit too slow (or require too high a gear....).

BUT... I haven't run one or even watched one yet.

For the stock racers who complain about it being too slow.... welcome back to stock class. It's better for beginners.

If 13.5 becomes the new spec "superstock" class to replace the 19t class, so be it... as long as we don't have to put up with BOTH 13.5 and 19t/10.5. 10.5 is modified IMO.
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Old 01-18-2008, 06:57 PM   #50
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I have TWO of them
Well seems you don't have a clue or cannot drive and tell the difference!
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Old 01-18-2008, 08:28 PM   #51
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Right.... Illinois state champion and Indiana state champ means nothing....
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Old 01-18-2008, 08:35 PM   #52
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If the 17.5 is slower than 27t then the effect will be continuing poor attendance at big events for the stock class. By next year I expect they'll change the rules again to be 17.5 for stock and 13.5 for superstock (as previously outlined).
Something I keep reading on several 'off-road' threads is about the 17.5's being 'TOO SLOW' from guys who haven't run it...but they THINK it will be slow.

Often guys think a motor will be slow because of LOW rpm. DON'T BE FOOLED!

The 17.5 motors produce MORE power than a 27t STOCK MOTOR - and SPEED is from POWER not RPM.

GEAR UP! WAY UP!

The 17.5 motor will only spin at about 15-16000 RPM unloaded...under load that number will probably fall down to around 11-12,000, maybe LOWER depending on how Hooked up you are.

What do your STOCK 27t motors dyno out at under load RPM wise? 24,000 - 26,000

That's a TON different gearing to go the same speed - but the B/L motor has the Power and ToRQUE to pull it.

It will be interesting to see what the speeds of this class are in 3 months~
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Old 01-18-2008, 08:46 PM   #53
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Robins,

I think the results show for themselves.

Does anyone know where the 17.5 is available? I have been looking and can't find a shop that has them available. I would like to purchase one and really do a comparison on our home track.

Also does anyone know where I could find a smaller spur gear for an associated? I have already geared my 13.5 30/78 and you almost run out of room to move the motor back far enough. I am thinking you are going to need to be around a 35-39/78 to make the kind of power you will need out of a 17.5.

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Old 01-18-2008, 09:32 PM   #54
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Well seems you don't have a clue or cannot drive and tell the difference!

First off, I think the argument of 'slowing the stock class' down is pretty lame- This isnt NASCAR, lets let technology create better performance. Chassis' have improved, tires have improved, materials and quality have improved- that all = more speed. Saying that 'stock is good for beginners' is not the best argument- NOVICE is for beginners. The class where you learn to drive. In our area, you have to be able to drive very well to make top 5 in stock. I still fail to see the point in making stock slower when mod is getting faster. And yes, I know everyone will start throwing the 'superstock' and '19t' classes at me, but in all honesty, why should there be an 'intermediate' class that will further dilute the racing classes to begin with- 19t is Non-existent around here unless you want to run it in mod (which I have done every now and then).

Robins, hopefully you know better than to pay attention to some Losi driving 19t fool that thinks they know what they are talking about (obviously he is not from the Midwest or he'd have been lapped by you at some point in his career)
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Old 01-18-2008, 09:32 PM   #55
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Ahhh, this is refreshing.
Stock guys will still argue.

And I'll still run modified.
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Old 01-18-2008, 09:36 PM   #56
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Ahhh, this is refreshing.
Stock guys will still argue.

And I'll still run modified.
What, you want some too!? (I'm just messing w/ you)

Actually, the one cool thing from all of this mess might be a boost in Mod turnouts- Which will then make the transition to 2wd mod more fun (I hate running mod when there are 3 2wd mod's and 16 2wd stocks)
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Old 01-18-2008, 09:49 PM   #57
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Jake @ JPHRacing.com had ONE 17.5 left in stock as of this afternoon. (CA)

17.5 motor from JPHRacing.com

Rob Murdock @ Windtunnel R/C Products shows them in stock too (IA)

17.5 @ Windtunnell
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Old 01-18-2008, 09:55 PM   #58
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We have a bunch of pussies at our track,they would rather run stock!

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Old 01-18-2008, 09:57 PM   #59
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Right.... Illinois state champion and Indiana state champ means nothing....
In micro's?
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Old 01-18-2008, 10:36 PM   #60
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In micro's?
I don't really know Jacob, but I've seen him race. He can throw down a fast lap any time he wants, and string them together. I'm not one to talk , but if you come to Indy you can witness it yourself.

At our home track with fresh batts and a tuned monster, I had as much straightaway as anyone else, including 13.5's. The rest of the track wouldn't cooperate with my lack of skills though.
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