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Post by 440gtx on Mar 17, 2011 20:28:31 GMT -7
Here's one for the rules committee
I know that you can run the AW 4-gear chassis, in NF/C, with or without traction magnets.
If someone chooses to run an original AFX (non-magnatraction) chassis, are they allowed to add a dot traction magnet to the bottom of the chassis.
Matt
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L_Brown
Pro Stock
Larry Brown - North Texas
Posts: 347
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Post by L_Brown on Mar 17, 2011 21:51:39 GMT -7
I would say yes. It does not state factory traction magnets, just traction magnets.
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Post by 440gtx on Mar 17, 2011 23:09:31 GMT -7
I would say yes. It does not state factory traction magnets, just traction magnets. That's pretty much what I thought also. Anyone else have an opinion?
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Post by ninjatek on Mar 18, 2011 4:17:02 GMT -7
I would say yes. It does not state factory traction magnets, just traction magnets. That's pretty much what I thought also. Anyone else have an opinion? Rules used in last years NF/C Showdown and NTRA Finals state specificly 'no add-ons allowed'. www.ninjatekprojects.com/PDF/4Gear.pdfBuilders using the new AW chassis have the option to retain or remove the magnets. Testing previous to the ruling demonstrated no advantage to using magnets at 13.8V with stock arm. In testing the AW chassis ET improved when magnets were removed. Do not confuse NF/C rules with the recent Door Slammer rules. NF/ uses a stock chassis. Specific details for the upcoming race are currently under review. Look for race announcement with details to be released in the very near future (aiming at next weekend).
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Post by 440gtx on Mar 18, 2011 6:08:24 GMT -7
That's pretty much what I thought also. Anyone else have an opinion? Rules used in last years NF/C Showdown and NTRA Finals state specificly 'no add-ons allowed'. www.ninjatekprojects.com/PDF/4Gear.pdfBuilders using the new AW chassis have the option to retain or remove the magnets. Testing previous to the ruling demonstrated no advantage to using magnets at 13.8V with stock arm. In testing the AW chassis ET improved when magnets were removed. Do not confuse NF/C rules with the recent Door Slammer rules. NF/ uses a stock chassis. Specific details for the upcoming race are currently under review. Look for race announcement with details to be released in the very near future (aiming at next weekend). yes i know that the NF/C uses a stock chassis. but the x-traction and magnatraction chassis gain down force from the motor magnets. A non-magnatraction chassis doesn't have that benefit. If traction magnets are allowed in the x-traction, even though you don't need them, I think we should be able to add 1 to a 40 yr old AFX chassis. It just helps to smooth out the ride a little bit. I didn't know the rules were set in stone. We changed the max tire height between my race and the finals. BTW, this question isn't for my cars. Matt
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Post by ninjatek on Mar 18, 2011 6:58:37 GMT -7
yes i know that the NF/C uses a stock chassis. but the x-traction and magnatraction chassis gain down force from the motor magnets. A non-magnatraction chassis doesn't have that benefit. If traction magnets are allowed in the x-traction, even though you don't need them, I think we should be able to add 1 to a 40 yr old AFX chassis. It just helps to smooth out the ride a little bit. I didn't know the rules were set in stone. We changed the max tire height between my race and the finals. BTW, this question isn't for my cars. Matt Sorry about that Matt, I guess I kinda breezed by the words 'non-magnatraction'. I don't recall any testing performed for mag vs non-mag chassis. Based on your hypothesis, it is my opinion (not a ruling) that non-mag chassis should be allowed to add on traction mags. I will review the issue further and then post a ruling. The point is valid and should not matter who's car it is for.
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Post by ninjatek on Mar 18, 2011 13:22:55 GMT -7
After some pondering and having sought wise council, it has been agreed upon to allow the use of traction magnets in the NF/C Class. Below are the revised NTRA NF/C Class rules. *** The above rulings are final as of 3/18/11, amendments and revision will be applied if needed.
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Post by falcon on Mar 26, 2011 15:21:57 GMT -7
I have a question concerning arms.. I have a stock non MT 4gear pulled from an old wedge style dragster. It has the blue drag arm. All I have done is replaced the wheels and tires cleaned the comm and got new brushes. Is this arm legal? I have no idea of the ohm rating nor how to measure it.
Bob
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Post by sjracer on Mar 26, 2011 16:51:47 GMT -7
The blue drag arm ohms around 7.2, I'm not a judge but I don't think it's legal.
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Post by scottman2007 on Mar 26, 2011 18:47:54 GMT -7
No thats not allowed.... by the rules 14 ohm is the minimum,meaning thats the lowest. is the way i read it, meaning 14ohm and up is the rule.
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Post by TGM2054 on Mar 26, 2011 19:02:47 GMT -7
Now you got me wondering about the one I was going to use. I think it"s the original arm that came with the chassis.(Magna Traction chassis) It's got red tips with red wire. How do you measure the OHM's on one of these?
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Post by 440gtx on Mar 26, 2011 19:27:57 GMT -7
Now you got me wondering about the one I was going to use. I think it"s the original arm that came with the chassis.(Magna Traction chassis) It's got red tips with red wire. How do you measure the OHM's on one of these? check out this web page. It shows how to test an armature. netfixer.com/slots/arm.htmlMatt
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Post by falcon on Mar 26, 2011 20:44:59 GMT -7
According to that web page, a mean green is 6 ohm's. If that is the case what arm is everyone using? I am new to this class and want to be legal. And fast!! Bob
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Post by 440gtx on Mar 26, 2011 20:51:05 GMT -7
I use Autoworld armatures in my NF/C.
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Post by falcon on Mar 26, 2011 20:56:45 GMT -7
Will the ones in the new Pro Stocks work or regular cars ?
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