Neu 1515 or 1521??

[coolhandcountry]

I got a concern. Is the savage going to have the room for the 1521 neu in the spot you going to mount it.
It does have limits if you put the motor in some spots. Just like to add that. :)

[jhautz]

Good point on the 1521 fitting down on the motor plate CHC. There is more to it than just the length though...

The 1521 is almost exactly 1mm longer than a Lehner 1950. so it should fit length wise. But... the 15xx series Neu motors are bigger diameter than the Feigaos and Lehners. I think like 40mm vs 36mm on the smooth motors. The finned Neus are even bigger diameter. I have my motor set up sitting flat on the motor nitro motor plate and pushed all the way over against the side plate. Set there with a 36mm diameter Lehner I can just get a 20T pinion to fit on a 47T spur gear. If you use the bigger diameter Neu motor it wont allow you to get that big of a pinion gear on it. Some quick math estimates 17-18T pinion would be the largest that would fit a 47T spur.

Do some quick estimates with BrianG's speed calc and make sure that you will be able to get the speeds you want with the kv motor you choose on the voltage you want to run. My Savage setup is spinning the motor about 37000rpm to get the speeds I mentioned on a 20/47 gearing setup.

The smaller diameter motors might be a better choice than a Neu for mounting down inside the chassis. For sure dont get a finned Neu for this application. Just something to think about before you place an order.

[Purplefade]

Originally Posted by jhautz

Good point on the 1521 fitting down on the motor plate CHC. There is more to it than just the length though...

The 1521 is almost exactly 1mm longer than a Lehner 1950. so it should fit length wise. But... the 15xx series Neu motors are bigger diameter than the Feigaos and Lehners. I think like 40mm vs 36mm on the smooth motors. The finned Neus are even bigger diameter. I have my motor set up sitting flat on the motor nitro motor plate and pushed all the way over against the side plate. Set there with a 36mm diameter Lehner I can just get a 20T pinion to fit on a 47T spur gear. If you use the bigger diameter Neu motor it wont allow you to get that big of a pinion gear on it. Some quick math estimates 17-18T pinion would be the largest that would fit a 47T spur.

Do some quick estimates with BrianG's speed calc and make sure that you will be able to get the speeds you want with the kv motor you choose on the voltage you want to run. My Savage setup is spinning the motor about 37000rpm to get the speeds I mentioned on a 20/47 gearing setup.

The smaller diameter motors might be a better choice than a Neu for mounting down inside the chassis. For sure dont get a finned Neu for this application. Just something to think about before you place an order.

LOL, looks like I should read page 2 before responding so quickly :-) So you actually had some "difficulty" getting her tucked down in there did you. Huum, now I've got some thinking to do and will most certainly have to give a much harder look into putting something like Serums mount together. I think eliminating the motor plate all together and having the space open might be the ticket. I think my only concern at that point would be the drive shaft and possibly the brake discs... Fingers crossed using the low CG TVPs buys me the space I need to hold a finned can, thoughts on that?? - I just like the thought of the extra cooling privided by the surface area of the fins, any idea how much cooler, if any, they run vs the non-finned cans?

I'm actually going to go with the FLM low CG (standard not extended) TVPs and port all my guts over when they get here, having that extra .5 in there may push things down low enough to get it all to clear (without the motor plate). My concern at that point would be stabalizing the rear section of the TVPs between the trans and rear bulks, call me crazy but I run GH aluminum braces in mine now and it just makes me comfortable to know that I have that extra solid link back there... That said, it'll probably be OK using a nice solid motor mount and the GH bulks that I'm running now, can't imaging that losing one brace would introduce that much flex in such a short distance.

[Purplefade]

Originally Posted by coolhandcountry

I got a concern. Is the savage going to have the room for the 1521 neu in the spot you going to mount it.
It does have limits if you put the motor in some spots. Just like to add that. :)

chc - I too was concerned about that, I know even with my 9XL I was clear against the TVPs to get the mesh correct. I'm still actually a bit concerned with the finned Nue, but seeing so many guys running them, I'm sure I'll work something out. I'm hoping for some more info on jhautz mount, looks like he has his hung off the TVP using a "simple" L mount from say 3/16 - 1/4 inch aluminum. Also liked Serums adjustable mount alot as well, just need to shoot him a quick question on the over all setup and how it worked out. I know he posted his drawings, but I don't imagine I have the skill, nor tooling (more likely) to pull off making one of my own lol...

All that fun said, I've settled on the 1515/2.5d, I think the common theme was that the 1521 was going to be a drive train killer and I do want to have fun with it vs always have it apart for repairs

[jhautz]

Good chioce. Thats a great motor.

My motor mount is made up of a 3/16 aluminum plate screwed down from the bottom using the nitro mount holes and then I took 2 of the old Gmaxx motor mount plates and screwed it to the front of the 3/16 plate. I use the nitro motor mount adjustments to set the gear mesh.

You can kinda see it in this picture.

[Purplefade]

Ahh, OK, seeing the bigger picture, I see the bigger picture, lol. When I first looked at it, it looked like you had actually attached the mount to the TVP, I was curious how that worked out. I ended up doing the same thing, I used the FD ring mounts, they go completley around the can holding it like hose clamps (poor discription really, but you get the idea) and attach to the stock nitro motor plate using the stock holes for adjustment as well. All in all I really like them, but with the finned Nue, with any Nue for that matter, I won't be able to continue using them.

Now I have myself curious, maybe I'll look into cutting something down that would let me mount the motor to the TVP, run a simple support brace just over the spur nut and for stability and see what happens. I still like Serums two piece idea, gave him supreme adjustment with out all the headache of flipping the truck around to reach the nuts. Now I'm going to have to get creative!!

I've toyed with the idea of using Mikes motor mount for the Revo and just mounting it directly to the stock nitro motor plate but milling my own holes to allow side to side adjustment. Using low CG TVPs should give me the additional space I'd need for the larger pinions, but the thickness of Mikes mount may chew up a large portion of that as I know his mount is probably 3/16 inch thick or so itself. What to do, what to do