R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 06-09-2004, 12:14 PM   #1
Tech Fanatic
 
Join Date: Nov 2002
Location: seattle, WA
Posts: 864
Default MVP Tuning

Does anyone have any good tuning tips for the reedy MVP? I do not have much experiance with it and I dont know many people who do, but I would like some tips on tuning one. I was told you would be able to find information on tuning one on big jims site. But I had trouble finding information.

Also, currently with my monster stock Im gearing at an 8.14, how many teeth up would you gear for the MVP? I'm just looking for a starting point. Thanks
racerdx6 is offline   Reply With Quote
Old 06-09-2004, 12:25 PM   #2
Tech Regular
 
Claydoh's Avatar
 
Join Date: Sep 2002
Location: being there
Posts: 402
Send a message via AIM to Claydoh
Default

I always used reedy 767's and red springs. Gearing them is easy, just keep adding teeth till it dumps. The mvp has tons of torque, I'd start at 7.4 or so
Claydoh is offline   Reply With Quote
Old 06-09-2004, 12:30 PM   #3
OVA
Tech Champion
 
OVA's Avatar
 
Join Date: Dec 2002
Location: WASHINGTON
Posts: 8,800
Trader Rating: 79 (100%+)
Default

Claydoh you must be rracing a small track
__________________
I have not failed. I've just found 10,000 ways that won't work
OVA is offline   Reply With Quote
Old 06-09-2004, 12:32 PM   #4
OVA
Tech Champion
 
OVA's Avatar
 
Join Date: Dec 2002
Location: WASHINGTON
Posts: 8,800
Trader Rating: 79 (100%+)
Default

I don't think the MVP have a ton of torque maybe ton of RPM
__________________
I have not failed. I've just found 10,000 ways that won't work
OVA is offline   Reply With Quote
Old 06-09-2004, 12:34 PM   #5
Tech Elite
 
JDXray's Avatar
 
Join Date: Mar 2004
Location: Long Island, New York
Posts: 2,802
Trader Rating: 3 (100%+)
Send a message via AIM to JDXray
Default

ya i had tons of rpm on my reedy mvp. Do you need to add a diode?
JDXray is offline   Reply With Quote
Old 06-09-2004, 12:51 PM   #6
Tech Master
 
rod_b's Avatar
 
Join Date: Jan 2002
Location: Covina CA
Posts: 1,033
Send a message via AIM to rod_b
Default

You can find tuning tips for the MVP (as well as other motors in general) on Big Jim's forum on rccars.com. His setup does create a very torquey motor which I like for offroad or a small, tight on-road track. I believe he recommends gearing about 1-2T smaller than you would a P2K.
rod_b is offline   Reply With Quote
Old 06-09-2004, 01:07 PM   #7
Tech Fanatic
 
Join Date: Nov 2002
Location: seattle, WA
Posts: 864
Default

I have been looking around for MVP tuning tips on his site. But I have been having trouble finding many. I read about 10 pages f the Motor Tuning Setups forum. Heres the tips I found I might try:

-cut down the leading edges on the brushes (Im pretty sure the "leading edge" on a brush is the top of the brush on one side and the bottom of the brush on the other. is that right?)

-drill a 5/64" hole in the brushes

-767 + brush/ 766 - brush or 766's all around?

I couldnt find much on springs for it, so I will probably start out with a red/green combo. Thanks for any more help.
racerdx6 is offline   Reply With Quote
Old 06-09-2004, 01:15 PM   #8
Tech Master
 
rod_b's Avatar
 
Join Date: Jan 2002
Location: Covina CA
Posts: 1,033
Send a message via AIM to rod_b
Default

Big Jim's basic MVP setup is/was 767+/766- with brushes narrowed to or narrowed by 0.140". I can't remember which but basically cut on the leading and trailing edge until the brush is about the width of a standup brush. Red and green springs or if you have Sonic Fiddle Stick it would be 6.5FS+ and 6.0FS- where FS stands for fiddle stick units of measurement. Other then that, it's all the other basic stuff like aligning brushhoods, polishing the armature shaft and bushings and shimming to the center of the magnetic field. Hope this helps.
rod_b is offline   Reply With Quote
Old 06-09-2004, 02:17 PM   #9
Tech Master
 
burbs's Avatar
 
Join Date: Feb 2004
Location: wisconsin
Posts: 1,152
Trader Rating: 1 (100%+)
Send a message via AIM to burbs Send a message via Yahoo to burbs
Default

according to the associated guys at the last associated race i was at.. use a full face 767, with purple springs...

these motors look ok up front, but they seem to fall off at the last minute.. mostly i think due to the lack of cooling holes in the can...
burbs is offline   Reply With Quote
Old 06-09-2004, 04:13 PM   #10
Tech Champion
 
Korey Harbke's Avatar
 
Join Date: Oct 2002
Location: Redmond, WA
Posts: 6,126
Trader Rating: 13 (100%+)
Default

When you look at the brush, the leading edge is the edge of the brush that the armature rotates into. So when you trim the leading edge you are kinda decreasing timing. When you trim the trailing edge, you are increasing timing a tad.

When you trim a bit off both the leading and trailing edge of the brush you will effectivly reduce the amount of overlap on the com and the amount of rpm. The benefit of this is you get more torque, better effceincy, and cooler running temps. This allows to to gear a bit taller.

The MVP is very similar to the Orion Core stock or the Peak Hellfire Stock. They have almost identical armatures, but a different can from the MVP. They all run hot, but most of my fast stock motors run a little warm anyways from gearing them to the moon. Hope this helps ya out dude. Shoot me an email if you have any more questions.

-Sushi Boy
__________________
Xray - RC America - Hudy - Apex RC - LRP - Protoform - AVID - 1Up Racing - Xenon - Xpert - Sanwa - RC Mission America - SpeedZombi - Slapmaster Tools - Turtlemaster Racing - Seattle RC Racers
Korey Harbke is offline   Reply With Quote
Old 06-09-2004, 05:12 PM   #11
Tech Elite
 
fatdoggy's Avatar
R/C Tech Charter Subscriber
 
Join Date: Aug 2001
Location: MD USA
Posts: 3,642
Default

When I ran the Mvp it never had rpm, basically gear the snot out of it and go from there.
fatdoggy is offline   Reply With Quote
Old 06-09-2004, 11:00 PM   #12
Tech Fanatic
 
evaa's Avatar
 
Join Date: Apr 2003
Location: south of metro manila
Posts: 963
Trader Rating: 7 (100%+)
Default

Quote:
Originally posted by JDXray
ya i had tons of rpm on my reedy mvp. Do you need to add a diode?
yep, tons of rpm, using reedy serrated 767s and a hole in the center.

i think caps are what you need, although i may be wrong. i use a keyence so i dont use a schotky diiode.

hope this helps.
evaa is offline   Reply With Quote
Old 06-10-2004, 07:03 AM   #13
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,550
Trader Rating: 240 (100%+)
Default

I ran the MVP in both its stock and Big Jim form. With the stock form, it was really RPM-ish. I ran some like this at RC-Madness which is a tight indoor track and it was really needing more torque.

When I did run my Big Jim MVP, once I found the sweet spot for gearing the motor really ripped. I lent it to a guy running 1/12 scale and he was keeping up with the guys running Monster Stocks and Binaries, even though it would probably be better to run the MVP in the standard form for this kind of racing.

The main thing that is really nice about the MVP is the quality of the magnets, they last a long time at those high temperatures compared to the trinity motors.

I just wish you didn't have to use narrow brushes. since I am not good at doing that, have to buy them and they usually go for $4 a set. I can get standard 767s for less than two.

But its a good motor if you don't mind fiddling with the gearing to get it just right. 64pitch gears are a bonus here.
Cain is offline   Reply With Quote
Old 06-10-2004, 12:32 PM   #14
Tech Addict
 
crACkeD ChaSsiS's Avatar
 
Join Date: Feb 2002
Location: Getting practice 1/10 stock onroad
Posts: 632
Trader Rating: 4 (100%+)
Send a message via AIM to crACkeD ChaSsiS Send a message via Yahoo to crACkeD ChaSsiS
Default MVP

MAN I wish i could help u out i started runnin mvps when i first started racin.an i had my tuned very well it got hot but it was fast as helllllllllllllll. srry man cyz
crACkeD ChaSsiS is offline   Reply With Quote
Old 06-10-2004, 11:48 PM   #15
Tech Adept
 
Join Date: Jan 2004
Location: Washington
Posts: 127
Trader Rating: 1 (100%+)
Default mvp

do you think the mvp is going to be the hand out motor and nats in portland??
benicetofatkids is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tuning Class..any SIFU (klang valley) offer engine tuning class??.. azmin Malaysian R/C Racers 17 06-20-2008 10:42 PM
Engine Tuning 101 (General Tuning) Kemorc Onroad Nitro Engine Zone 41 11-19-2007 07:04 PM
beginner questions re: car tuning and motor tuning! Captjono Rookie Zone 5 02-19-2005 12:01 PM
beginners question re: car tuning and motor tuning! Captjono Electric On-Road 5 02-19-2005 03:01 AM
tuning sloedown Nitro On-Road 5 08-19-2003 06:33 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:16 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net