R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 01-22-2010, 07:19 AM   #1
Tech Addict
 
mattozx6rr's Avatar
 
Join Date: Nov 2009
Location: Central Florida
Posts: 583
Trader Rating: 15 (100%+)
Questions?? mbx5t big block motor mount help

I have an issue with motor mounts. I am going from an .21 os motor to a .28 picco in my MBX5T. The Picco is longer and will not work with the stock motor mount. Who makes a good 1 piece motor mount to put a big block in my truggy? If need be I can fabricate one but would rather spend my time at the track than in the garage.

Thanks in advance for any help.
__________________
1 X MBX6T plus 21-4c
Twisted Bones R/C apparel
mattozx6rr is offline   Reply With Quote
Old 01-22-2010, 07:39 AM   #2
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by mattozx6rr View Post
I have an issue with motor mounts. I am going from an .21 os motor to a .28 picco in my MBX5T. The Picco is longer and will not work with the stock motor mount. Who makes a good 1 piece motor mount to put a big block in my truggy? If need be I can fabricate one but would rather spend my time at the track than in the garage.

Thanks in advance for any help.
.28 Picco is longer? I thought everything from .21 up was the same... are you sure you don't have the motor mounts backward or something?
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.
DOMIT is offline   Reply With Quote
Old 01-22-2010, 09:03 AM   #3
Tech Champion
 
Maximo's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2005
Posts: 7,900
Trader Rating: 11 (100%+)
Default

a bumpstart Picco 28 fits just fine.... a pullstart wont fit....
Maximo is offline   Reply With Quote
Old 01-22-2010, 09:08 AM   #4
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by Maximo View Post
a bumpstart Picco 28 fits just fine.... a pullstart wont fit....
Hmmm... good point.
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.
DOMIT is offline   Reply With Quote
Old 01-22-2010, 09:12 AM   #5
Tech Addict
 
mattozx6rr's Avatar
 
Join Date: Nov 2009
Location: Central Florida
Posts: 583
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by Maximo View Post
a bumpstart Picco 28 fits just fine.... a pullstart wont fit....
Is that ther reason the block is almost a quarter of an inch longer on the picco?
__________________
1 X MBX6T plus 21-4c
Twisted Bones R/C apparel
mattozx6rr is offline   Reply With Quote
Old 01-22-2010, 09:26 AM   #6
Tech Addict
 
mattozx6rr's Avatar
 
Join Date: Nov 2009
Location: Central Florida
Posts: 583
Trader Rating: 15 (100%+)
Default

Just for reference, the picco is a P3 -.28 and the OS is a VG -.21. I dont know much about motors at this point, just getting back into this sport.
When you put them motor mount to motor mount the bearing face on the block of the Picco is almost a quarter of an inch further forward than the os yet the rear of the engines is located the same.
__________________
1 X MBX6T plus 21-4c
Twisted Bones R/C apparel
mattozx6rr is offline   Reply With Quote
Old 01-22-2010, 10:25 AM   #7
Tech Master
 
GREGORY!'s Avatar
 
Join Date: Jun 2006
Location: Greece
Posts: 1,074
Trader Rating: 1 (100%+)
Default

you must grind it just a little.
i made the same with the picco p7 evo 2.
it's not a big deal.
GREGORY! is offline   Reply With Quote
Old 01-22-2010, 10:28 AM   #8
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by mattozx6rr View Post
Just for reference, the picco is a P3 -.28 and the OS is a VG -.21. I dont know much about motors at this point, just getting back into this sport.
When you put them motor mount to motor mount the bearing face on the block of the Picco is almost a quarter of an inch further forward than the os yet the rear of the engines is located the same.
Line them up so the cylinder heads are even... or better yet, so the holes in the motor mount are even. Where is the extra length now? The distance from the front motor mount hole to the end of the bearing face on the front should be virtually identical. Am I correct?

Pics would be helpful.
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.
DOMIT is offline   Reply With Quote
Old 01-22-2010, 10:30 AM   #9
Tech Champion
 
Maximo's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2005
Posts: 7,900
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by DOMIT View Post
Line them up so the cylinder heads are even... or better yet, so the holes in the motor mount are even. Where is the extra length now? The distance from the front motor mount hole to the end of the bearing face on the front should be virtually identical. Am I correct?

Pics would be helpful.

good point.

it has also been years since I used a stock MBX5T mount, I run all KH mounts on my rigs
Maximo is offline   Reply With Quote
Old 01-22-2010, 10:38 AM   #10
Tech Addict
 
mattozx6rr's Avatar
 
Join Date: Nov 2009
Location: Central Florida
Posts: 583
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by DOMIT View Post
The distance from the front motor mount hole to the end of the bearing face on the front should be virtually identical. Am I correct?

Pics would be helpful.

That is where the difference is. The Picco is a little under a quarter of an inch longer than the OS.

I would post pics but I am at work right now.

I have been told at this point from another RC driver that the Mugen MBX5T motor mounts were designed for small blocks only. Someone has to have an aftermarket big block mount.

Only reason I am trying to get the PICCO .28 in is it was given to me for free with only 2 gal through it and I wanted to see if it makes much difference on the track.
I am In the process of putting the cash together for a V-Spec right now so I dont want to burn time on fabbing a motor mount just to cast it aside when the V-Spec arrives.

Thanks for all the help so far you guys.
__________________
1 X MBX6T plus 21-4c
Twisted Bones R/C apparel
mattozx6rr is offline   Reply With Quote
Old 01-22-2010, 10:42 AM   #11
Tech Champion
 
Maximo's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2005
Posts: 7,900
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by mattozx6rr View Post
That is where the difference is. The Picco is a little under a quarter of an inch longer than the OS.

I would post pics but I am at work right now.

I have been told at this point from another RC driver that the Mugen MBX5T motor mounts were designed for small blocks only. Someone has to have an aftermarket big block mount.

Only reason I am trying to get the PICCO .28 in is it was given to me for free with only 2 gal through it and I wanted to see if it makes much difference on the track.
I am In the process of putting the cash together for a V-Spec right now so I dont want to burn time on fabbing a motor mount just to cast it aside when the V-Spec arrives.

Thanks for all the help so far you guys.

You should be able to make it fit..a Picco 28 is a big block, but so is a VG and V-Spec....the MBX series machines were all built for big blocks.... the Picco 28 may be slightly longer but you should be able to make it fit.....
Maximo is offline   Reply With Quote
Old 01-22-2010, 10:50 AM   #12
Tech Addict
 
mattozx6rr's Avatar
 
Join Date: Nov 2009
Location: Central Florida
Posts: 583
Trader Rating: 15 (100%+)
Default

When I put the picco in the spur gear rubs directly against the clutch bell and only catches the edge of the gears on the clutch bell. I think at this point I may just put it on the shelf for a rainy day project and just get the v spec on its way.

Thanks for your help.
__________________
1 X MBX6T plus 21-4c
Twisted Bones R/C apparel
mattozx6rr is offline   Reply With Quote
Old 01-22-2010, 10:52 AM   #13
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,782
Trader Rating: 23 (100%+)
Default

OK, so the problem is that this motor is longer right? So it doesn't fit because you can't get the motor to move back far enough to keep the clutch from hitting the spur gear? Does this sound right?

If so, you should be able to just grind the holes in the chassis out a bit so the motor mount will slide back more. This will not affect putting a VSpec in it, as you would just have to slide the motor mount forward again.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 01-22-2010, 10:53 AM   #14
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,782
Trader Rating: 23 (100%+)
Default

Oh, and a different mount will not help as they will all be built with the same dimensions.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 01-22-2010, 10:56 AM   #15
Tech Champion
 
Maximo's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jan 2005
Posts: 7,900
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by mattozx6rr View Post
When I put the picco in the spur gear rubs directly against the clutch bell and only catches the edge of the gears on the clutch bell. I think at this point I may just put it on the shelf for a rainy day project and just get the v spec on its way.

Thanks for your help.
what flywheel are you using ? you may be able to gain some clearance by taking some off the backside of the collet...... You may be using a thick flywheel, the Mugen flywheels are very shallow to allow enough clearance......
Maximo is offline   Reply With Quote
Reply


Tags
bigblock motor mounts, mbx5t, motor mounts


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 10:11 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net