RCCrawler Forums

Just Zach · 01-22-2007, 07:32 AM

Quote:

Originally Posted by LIKES2CRAWL

All these BMv2 popping out of the woodwork looking good!

So how many BMv2 are there gonna be at nationals this year?

You're starting to see them a lot. I've really been against torsion rigs since I started getting into crawling but this is the first one I have liked and its changing my mind. I am very temped to run it a the next comp but I think I will stick with my j2-tt because I have a lot more run time on it and the corse requires more articulation. We'll see though, I am going to test it out today on some rocks. I have a buddy that is going to run it at the next comp and if he beats me I will probably have to switch to that for my comp rig.

nitromtcrawler · 01-22-2007, 08:47 AM

hi. nice rig i really dig that body even though i hate yotas but it look sweet.i have made my own bmv2 and i know its smaller than the original.but i get a lot more flex from mine then all of the bmv2s that i have seen.i get 4 3/4 inches on the front and a hair ove 5 on the back. so i was wondering y????

nitromtcrawler · 01-22-2007, 08:52 AM

hey i forgot to tell u. i run the same style batt on mine and i placed it on the same side as u but insted i stood the batt up on its side and siptied it to the tranny plate.and it does not restrict my flex at all.i hope this can help.

Just Zach · 01-22-2007, 12:00 PM

I got to drive it some this morning. I definately have to modify my driving style from my other rig but near vertical stuff was awesome! There were a couple moves that I have figured out with my other rig that I couldn't do with this but I think its more me than the truck. That being said I will run my J2-tt at the comp for sure but mostly because I know it better.

Cloak · 01-22-2007, 01:16 PM

Quote:

Originally Posted by justgiveereh

I got to drive it some this morning. I definately have to modify my driving style from my other rig but near vertical stuff was awesome! There were a couple moves that I have figured out with my other rig that I couldn't do with this but I think its more me than the truck. That being said I will run my J2-tt at the comp for sure but mostly because I know it better.

I'm right there with you. I spent a good part of yesterday putting more weight on my truck until I could do some of the stuff I did with my SW2. It really amazes me how different the rigs are. I think I'm going to run this rig for this season. I have my SW2 down, but what's the fun in staying the same.

dezfan · 01-22-2007, 02:17 PM

Yeah, I too am adding weight (strategically) to my BM-VII.

But it's easier to add weight down low than to try and remove it from from places it can't easily be removed.

Just Zach · 01-22-2007, 02:20 PM

Quote:

Originally Posted by dezfan

Yeah, I too am adding weight (strategically) to my BM-VII.

But it's easier to add weight down low than to try and remove it from from places it can't easily be removed.

I agree 100%

toyofast · 01-22-2007, 02:21 PM

Quote:

Originally Posted by dezfan

Yeah, I too am adding weight (strategically) to my BM-VII.

So is the BMVii too light? I guess we can try to make the axle plates out of steel....

Cloak · 01-22-2007, 02:31 PM

Quote:

Originally Posted by toyofast

So is the BMVii too light? I guess we can try to make the axle plates out of steel....

Honestly, I think I like the idea of putting the weight in the tires or on the axles. I've been putting tape weights on the front and rear axles instead of having more weight up top. Down low is the way to go.

I weighed my rig just a few mins ago (brought it with me to work) and I'm at 6.5 lbs with a sub C pack so far, balance is about 60/40 towards the front. How heavy are the rest of you ending up? I found that's enough to cause some droop where I want it for going up hills. Less up there and it seems to twist and rebound back.

dezfan · 01-22-2007, 02:34 PM

Quote:

Originally Posted by toyofast

So is the BMVii too light? I guess we can try to make the axle plates out of steel....

That might not be a bad idea.

I would rather have it to light and add the weight down low were it will help.

Mine ready to crawl set up w/ a lathe motor, 8 cell battery, RC4WD bead locks and the Badlands tires is 5 lbs 11 ozs.

Change that to a BL motor, 2.2 in Mashers and HPI wheels And I'll bet it's well under 5 lbs. easy.

davidcrawls · 01-22-2007, 02:37 PM

looks cool but not very much flex with it, id slide the tranny forward to get a bit more flex out of it
dave

Just Zach · 01-22-2007, 03:05 PM

Quote:

Originally Posted by toyofast

So is the BMVii too light? I guess we can try to make the axle plates out of steel....

Don't add weight to the chassis, I think the trick is going to be adding weight to the axles or wheels, preferably the wider and lower the better because it will articulate better and keep the COG low. That is what makes this chassis so great is the low COG. Unlike other link chassis you will have to add it to the front and rear not just the front.
I am planning on moving the tranny farther forward but I have to get a different battery first.

Just Zach · 01-24-2007, 11:25 PM

So I got a 6 cell tamiya 1700 triagle shaped batter that works much better and looks better too. I moved the tranny forward. I added about 2 oz of weight to each tire which has increased flex some, I now get about 3.5" where I was getting about 2.75".

So I finally got some real run time with it today. First impressions are that its a very capable rig, verticals are great!. Smooth side hills are very good and the low profile actually lets you get under stuff. I know getting under stuff sounds weird but its fun to sneak under overhangs that other rigs have to go around.

This chassis and I assume any torsion chassis has a tendency to sling-shot the crawler into a roll over in the right circumstances. I wish there was some way to add some damping to it but I can't think of anything.

In all I am very happy with it. It is fun to have something so different than my other crawlers and it makes you learn a new driving style which is cool too.

bigflex · 01-25-2007, 01:38 AM

Quote:

Originally Posted by Johnson420

You have a tire on backwards

Looks Good
Do you have any weight in the tires?

no he has 3 on backwards!

bigflex · 01-25-2007, 01:44 AM

Quote:

Originally Posted by justgiveereh

Don't add weight to the chassis, I think the trick is going to be adding weight to the axles or wheels, preferably the wider and lower the better because it will articulate better and keep the COG low. That is what makes this chassis so great is the low COG. Unlike other link chassis you will have to add it to the front and rear not just the front.
I am planning on moving the tranny farther forward but I have to get a different battery first.

actually by making the axle plates out of steel he would be adding the weight to the axles where you want it!

Just Zach · 01-25-2007, 08:45 AM

Quote:

Originally Posted by bigflex

actually by making the axle plates out of steel he would be adding the weight to the axles where you want it!

What about doing the front and rear in aluminum and the center in delran. It does get hung up on stuff some and it would help if it was delran, I think.
Wheel weight is still better than steel plates though because is is centered on the mid line of the axle and the plate is slightly above the axle.

Just Zach · 01-25-2007, 08:48 AM

Quote:

Originally Posted by bigflex

no he has 3 on backwards!

I fixed the tire but in my mind having them the direction I run them makes sense because it pulls to the center of the tire instead of out. Honestly, I don't think it makes a difference though.

TerribleOne · 01-25-2007, 10:59 AM

Quote:

Originally Posted by toyofast

So is the BMVii too light? I guess we can try to make the axle plates out of steel....

Steel would be cool but, having a fixed plate with a "floating" wire inside, I would be a little concerned about glitching problems.

Just Zach · 01-25-2007, 05:53 PM

Here's a picture with the new modifications.

Just Zach · 01-30-2007, 09:04 PM

So I let my friend borrow this rig to compete at the last UTRCRC comp. He took third with a little luck. but just a little. He was the second to even run the courses and had only driven it around for 5 minutes in my living room the night before. I think it goes to show how good this rig is. With more time with it and knowing the rules better it could be scary how well he does.

I have decided I am going to continue with my j2-tt for my main rig but I also have more driving time with it and have spent hours and hours tweaking the set up. That is one of the best things about the bmv, set up is very simple. If the course is right though, who knows, maybe I'll run the BMV.

I drove the bmv around for a while after the comp and was very impressed. Especially because I have approximately half the $ in this one.
If you want a very competitive crawler, for a great price, that is easy to set up you absolutely cannot go wrong with the BMV! It took a couple of big tumbles and held up fine.

01-22-2007, 08:47 AM	#22
nitromtcrawler Rock Crawler Join Date: Dec 2006 Location: Southern California Posts: 525	hi. nice rig i really dig that body even though i hate yotas but it look sweet.i have made my own bmv2 and i know its smaller than the original.but i get a lot more flex from mine then all of the bmv2s that i have seen.i get 4 3/4 inches on the front and a hair ove 5 on the back. so i was wondering y????

01-22-2007, 08:52 AM	#23
nitromtcrawler Rock Crawler Join Date: Dec 2006 Location: Southern California Posts: 525	hey i forgot to tell u. i run the same style batt on mine and i placed it on the same side as u but insted i stood the batt up on its side and siptied it to the tranny plate.and it does not restrict my flex at all.i hope this can help.

01-22-2007, 12:00 PM	#24
Just Zach '08 2.2 National Champ Join Date: Nov 2006 Location: UTRCRC Posts: 5,585	I got to drive it some this morning. I definately have to modify my driving style from my other rig but near vertical stuff was awesome! There were a couple moves that I have figured out with my other rig that I couldn't do with this but I think its more me than the truck. That being said I will run my J2-tt at the comp for sure but mostly because I know it better.

01-22-2007, 02:17 PM	#26
dezfan I wanna be Dave Join Date: Dec 2005 Location: Happiness is a warm AK. Posts: 12,563	Yeah, I too am adding weight (strategically) to my BM-VII. But it's easier to add weight down low than to try and remove it from from places it can't easily be removed.

01-22-2007, 02:37 PM	#31
davidcrawls Newbie Join Date: Jun 2006 Location: moundsville Posts: 28	looks cool but not very much flex with it, id slide the tranny forward to get a bit more flex out of it dave

01-24-2007, 11:25 PM	#33
Just Zach '08 2.2 National Champ Join Date: Nov 2006 Location: UTRCRC Posts: 5,585	So I got a 6 cell tamiya 1700 triagle shaped batter that works much better and looks better too. I moved the tranny forward. I added about 2 oz of weight to each tire which has increased flex some, I now get about 3.5" where I was getting about 2.75". So I finally got some real run time with it today. First impressions are that its a very capable rig, verticals are great!. Smooth side hills are very good and the low profile actually lets you get under stuff. I know getting under stuff sounds weird but its fun to sneak under overhangs that other rigs have to go around. This chassis and I assume any torsion chassis has a tendency to sling-shot the crawler into a roll over in the right circumstances. I wish there was some way to add some damping to it but I can't think of anything. In all I am very happy with it. It is fun to have something so different than my other crawlers and it makes you learn a new driving style which is cool too.

01-25-2007, 05:53 PM	#39
Just Zach '08 2.2 National Champ Join Date: Nov 2006 Location: UTRCRC Posts: 5,585	Here's a picture with the new modifications.

01-30-2007, 09:04 PM	#40
Just Zach '08 2.2 National Champ Join Date: Nov 2006 Location: UTRCRC Posts: 5,585	So I let my friend borrow this rig to compete at the last UTRCRC comp. He took third with a little luck. but just a little. He was the second to even run the courses and had only driven it around for 5 minutes in my living room the night before. I think it goes to show how good this rig is. With more time with it and knowing the rules better it could be scary how well he does. I have decided I am going to continue with my j2-tt for my main rig but I also have more driving time with it and have spent hours and hours tweaking the set up. That is one of the best things about the bmv, set up is very simple. If the course is right though, who knows, maybe I'll run the BMV. I drove the bmv around for a while after the comp and was very impressed. Especially because I have approximately half the $ in this one. If you want a very competitive crawler, for a great price, that is easy to set up you absolutely cannot go wrong with the BMV! It took a couple of big tumbles and held up fine.

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