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Chassis » Inline Chassis Question » 3/13/2013 4:52 am

JT Kirk
Replies: 6

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You need to make front mount in the nose pinning that far back will bind the body. I have 2 econo cars that are built with .078 wire and they run perfect and have been in the .920s on nuimerous occassions.

Motors Forum » One Mean Machine! 12 Turns Of 23 Gauge, Quad Neos! » 12/20/2012 2:32 pm

JT Kirk
Replies: 8

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Man Timmy I'd send that thing back you don't see how slo[pp[y that one stack is wound? 

Motors Forum » OK Marty I'm confused. » 11/30/2012 1:07 pm

JT Kirk
Replies: 1

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I use both fx arms and american arms usually the american arm is in the .195 to .200 diameter.

Now for a sub thread ina thread a brush question. Have you ever heard of or used a golddust brush and a Kofford brush in the same motor? I think this a road race urban legend but it's supposed to give even wear between pos and neg brush?

Motors Forum » OK Marty I'm confused. » 11/30/2012 6:07 am

JT Kirk
Replies: 1

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In your picture of the cut brush scenario 3 you are removing .030 total from brush .015 from each side right? If i just want to do scenerio 2 trailing edge only cause i don't want to reduce timing di I just remove .015 from trailing edges of brushes or do I remove .030?
Can you show the same motors results with 1 stock width brushes 2 trailing side cut only and 3 both sides cut?

Motors Forum » Current draw blessing or curse » 11/28/2012 10:16 am

JT Kirk
Replies: 1

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Marty I have fallen into the hi current trap inthe past. My best ever econo motor pulled 3.91 amps at 5 volts. I was disap[pointed in it but the motor was arocket. Car ran .9194 t allmost 62 mph. Others had motors pulling 5 to 7 amps and were turds.
Now I know that stelar amp draws do not equal power.

Motors Forum » Current draw blessing or curse » 11/28/2012 6:16 am

JT Kirk
Replies: 1

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Marty I believe I am seeing something in the last tech article. How many have been fooled because their motors draw a high current5 at x amount of volts and think they have a rocket and the motor sucks on te track. I think te overlap can cause false hopes in a motor. Also armature binding  or misalignment can run up current as well. Can poor fitting brush hardware cause high current draw?

Motors Forum » epx and gold dot magnets » 11/13/2012 10:09 am

JT Kirk
Replies: 2

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FXmags and EXP gauss different. FX mags are typically higher gausing than exps. Also if you get he Kelly matched FX mags your going to get a better match.You have to check both types in the same can because the parma can causes about a 30 to 40 point increase over a fx can.

Chassis » wheelie bar talk? » 11/05/2012 7:47 pm

JT Kirk
Replies: 20

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Billy your givin up top secret stuff. SHhhhhh! LOL

Motors Forum » old time racer needs to lear new tricks » 10/30/2012 7:19 pm

JT Kirk
Replies: 5

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Gary we run spec hemi class and it's been a good class so far. The racers who really 2want to run are doing well and a couple of bracket racer types fell out fast when the times started comming down they did not have the abilit5y6 or heart to run. But just use some of the older class cars and install econo style fxs16d motors in them. Makes racing fun and less costly than quad stuff or neo stuff.

Motors Forum » tuning a emmps motor » 10/27/2012 4:56 pm

JT Kirk
Replies: 1

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http://slotblog.net/topic/777-building-race-winning-c-cans/

First order of busoiness you need to get very good at motor setup and blueprinting. Then you can go from there.

BTW what motor and arm are you using at your track. Some use fx setup with American arm othere fx setup with fx chinese and TR uses koford 19 neo motor. Blueprintong will be universal cauce if can mags and endbell  are setup correctly.

Motors Forum » Armature Theory? » 10/17/2012 6:00 am

JT Kirk
Replies: 2

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I'm suprised no response to this thread.

Motors Forum » Armature Theory? » 10/15/2012 12:08 pm

JT Kirk
Replies: 2

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I have a few questions on open motor armatures. I see on scale arms they can be built using .014 or .007 lamination plates to build the stack. What is the difference in the performance or magnetic qualities between the thin vs thick plates.

Next comes stack length i see euro opne winds on stacks as short as .250 but most G7 arms are like .350 or longer.What is the advantage or difference in torque or rpm in the power band.

Next how does number of turns and wire gauge affect rpm and torque?

Also how does timing play in an open motor say 15 degrees vs 25 degrees. It seems like in the neo world the magnets are so strong you need an arm that is made to turn up the rpms to overcome the ultra magnetic force on the armature to allow it to rev up on the big end.

What gauge wire is avaliable does it go below 22 gauge?

example hawk6 can with strong single neo mags you have 2 different arms.
Arm 1 .445 diameter .300 long stack wound 18 turns 22 gauge wire 26 degrees vs arm 2 .445 dia 380 long stack 18 turns 22 gauge wire 26 degrees. What operational difference between the arms more or less rpm between arms.

Next using same 2 blanks how would going to say 16 turns of 20 gauge wire affect power band?

Tips and frequently asked questions. » gearing question » 10/06/2012 3:53 pm

JT Kirk
Replies: 14

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Tree.d one thing I have found out runnind d can motors is they don't like being geared real short. I have seen time after time in econo cars if your too low 60 foot suffers and it kills mph. Yhe motor just wont rev up quick enough to use reall low gearing.

Think of a d can motor as a 460 ford and a c can like a 454 chevy. Basic design of the motors allows the chevy to rev up quicker due to smaller main and rod journal size.

Marty no tire growth figgured in? LOL your slipping.

Motors Forum » Motor shim? » 9/29/2012 8:26 pm

JT Kirk
Replies: 4

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Thanks guys I'll get the assortment from McmasterCarr

Motors Forum » Motor shim? » 9/29/2012 12:46 pm

JT Kirk
Replies: 4

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I assume you want to use a magnetic steel not stainless for shimming mags. I can get shim stock from McmasterCarr so is the plain steel shim stock what I need.
How do you install your shims? Do you cut shim to fit magnet then epoxy it to magnet first then put both in can with epoxy?
Is JB Weld better magnetly and strength wise than Koford epoxy?

Chassis » Hardbody Weight Distributation. » 9/27/2012 8:09 am

JT Kirk
Replies: 3

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Marty mine is at a slight rake nose is not at minimum distance to track but rear is about 1/4 inch higher in nack. Also I tend to mount the nose a little higher up than some not at the bottom of nose plate.

Oh yhea the econo car was an 04 gto with a 40.7 gram body it had the brass bar square brass rail under it car needed very little glue and Has ran in the .919 to .930s before. That car took less glue than most econo cars. Oh yhea it wasn't built like an "econo" should be built it had .078 wire mains .082 wheelie bar rails and .072 struts. It was a MM/PS build but ran great. It's a KYTR inline frams.

Chassis » Hardbody Weight Distributation. » 9/26/2012 12:43 pm

JT Kirk
Replies: 3

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Marty after reading your last article about weigh bias I just wanted to share how some of cars have been bnuilt in the past and where I am going forward in the future.
At first all my hardbodys were done the same way 1/4 inch square brass with a solid brass rail varied diameters with nose mount soldered in junction where rod sat on square  piece. This put a small amount of static weight over the braids. then what ever other weight to hit class rules was added to the nose plate. This has worked well for my econo cars and other cars I ran.
My latest cars are being built with lighter front nose mount and with a floating weight pan that I can adjust position from front to rear. My first car is a hemi dart I tried it at the back position in front of motor and found it didn't work had to move it back up front it sits right behind the nose plate and the car has been working great car id getting .130s 60 foot with chinese arm fx motor. I think it gets enough weight to keep nose planted but without excess friction on braid.

Chassis » Side winder frame and d can motors? » 9/18/2012 9:43 am

JT Kirk
Replies: 15

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Must be OK then on sidewinder.

Chassis » Side winder frame and d can motors? » 9/18/2012 5:43 am

JT Kirk
Replies: 15

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Rex W. wrote:

This any better?
http://i15.photobucket.com/albums/a399/racer4rw/preview_image_0_94084062x-1.jpg

uch better picture rex The pinion is higher than the axle here. What I am after is the idea of how frame reacts when pinion is higher or lower than axle centerline. I remember this was brought out before I thought it was on Unca Franks but i looked at the chassis link again and didn'tr see it. It seems the discussion was the frame would bow up or down according to which wat the pinion sat higher went one way lower went the other way. I still think if both are centered then it's less drag .

BTW does Mcmaster Carr still sell those motor mount screws I cant find them can you post the part number for them.

Chassis » Side winder frame and d can motors? » 9/17/2012 8:07 pm

JT Kirk
Replies: 15

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Sorry rex picture is so dark I can't make out where pinion is on that pic.

Chassis » Side winder frame and d can motors? » 9/16/2012 9:28 pm

JT Kirk
Replies: 15

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Gary Lum wrote:

I open up the motor mount holes on mine....  No biggie, it just needs a touch.  Never really messed with the axle height.  I run some funky pinion/spur gear combos to keep the endbell away from the tire. Not sure of the angle of the pinion....  But that would work great in an anglewinder config.

Gary I was just wondering because on UNCA Franks site he was saying on a side winder if pinion was higher or lower than axle canterline it causes frame to react differently. Too high causes ont thing too low the opposite neither one a good thing.Just something to think about and maby hash out an easy cure on these frames.

Chassis » Side winder frame and d can motors? » 9/16/2012 8:47 pm

JT Kirk
Replies: 15

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I have a couple of questions for you guys that run sidewinder frames with d can motors. Sibce a d can motor is .040 taller than a c can what do you do to get motors pinion centered on axle centerline since the armature will be sitting .020 higher than a c can. The reason I ask is because most frames are made for c cans TR Kesterson JDS WRP ect. The motor mount is and uprights were designed for a c can to sit flat on bottom plate and axle and pinion centerlie height line up for a .280 axle/pinion centerline, A d can would need to have holes at .300 centerline for motor to sit flat on motor plate. Do you raise your motor mount plate  and drill your axle holes higher for perfect fit? Just curious if any of you have thought of this or done anything about this. I know J&S chassis used to make a sidewinder frame just for d canc, Any one ever use them and if so what was main difference was it centerline height, chassis width dur to .025 longer motor or both? Any one know what the angle is on ARP/GT angled pinions? Thought they would be great to mount motor in angle winder position but still have straight algle gear mesh.

Motors Forum » Spec Hybred d can shootout. » 9/10/2012 3:46 pm

JT Kirk
Replies: 0

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Well since we're getting some interest lets get basic rules package down in stone.
1. Body a pro stock style body fitting common mm/ps rules. Mild rake stock door lines must be visable filled grill and headlights ok as long as decals or paint is used to replace them. 7/8 maximum rear wing length no front diaplanes.
2. Chassis any chassis ball bearings allowed. 5" wheelie bar length from axle centerlint maximum.
3m. Motor must be stock FX setup bushings only no ball bearings to keep cost down. Copper hardware allowed.  Stock fx magnets 570 hole minimum. Any single wind Group 20 arm or P/S boss490 arm or 550 Big Block arm.
4. Car must weigh 125 grams minimum.
5. Wheels and tires 3/4" front tires must rotate not be angled in,
rear tires size up to you.

Last edited by JT Kirk (Today 3:00 pm)

Repost from boss490 thread.

Motors Forum » D Can shims » 9/07/2012 6:30 pm

JT Kirk
Replies: 7

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Gary Lum wrote:

Yes, I got mine from Ed a few months ago...  Had to post on c400.  I know he works odd hours.

Gary a ? What do cali guys need with shims? All you guys do is index class cars example .950 MM/PS why not 1.0 SS?GTD?   

Motors Forum » D Can shims » 9/07/2012 2:06 pm

JT Kirk
Replies: 7

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I don't know if he does goto club.400 and ask there he goes their and others may know if he does.

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