My Revos!!! - RC-Monster Forums

Matthew_Armeni · 11.10.2007, 09:17 PM

It kicks in pretty quick, and once it engages you're not really losing anymore power, but I understand what you are saying. Also that unloaded spin up I believe will lower the amp spikes, plus your motor doesn't have to brake so that should save some power. I plan on doing a comparison with eagle tree records sometime this month, direct drive/motor brake vs clutch vs direct drive mech brakes. I know there are benefits to each but I'm really interested in some hard data. Hopefully I'll be able to get together with riceman and do this at Palomar Raceway.

lincpimp · 11.10.2007, 11:08 PM

I ran it again and the clutch stayed much cooler this time, maybe it needed to be broken in? Anyway it ran fine, and I must have a decently effecient system. My run last night lasted about 15mins and I pulled 1550mah from my 5s pack according to the charger. So a 5000mah pack should get me near 45mins of runtime!!! Not sure if it will but I will try to do an long run and see how it fares. Have to do some repairs as the inside pinion bearing in the rear diff lost is balls and it locked up the rear ring and pinion. It was a used truck when I got it and it had a big block in it too, so I am not suprised. Luckily the guy included a new set of diffs for me!!!

BrianG · 11.10.2007, 11:17 PM

Quote:

Originally Posted by lincpimp

...lost is balls...

Oooh, I HATE it when that happens.

lincpimp · 11.11.2007, 12:37 AM

Quote:

Originally Posted by BrianG

Oooh, I HATE it when that happens.

It happens, what can you do?!

Anyway, ran the revo again, for about 40 mins total till the batteries started to fade. Temped everything and the motor was 135f, quark 115f, and the batteries were about 115f. The clutch was cool enought to touch, so I guess that it was wearing in when it was hot, and now seats better and is staying cooler. I am very happy with the temps, so I may leave the gearing where it is. I need to scare up a body for it, looking at a proline f450 body, they look cool. I may go thru it and change out the axles and the dust covers on the pivot balls as they look a little worn. Otherwise very happy with the conversion, and well worth the 130 I paid for it. I will install the sway bars next and see how they do. I may also mount the quark directly to the esc plate to act as a heatsink. All of my equipment is working well, and I would recommend any of it as high end.

Matthew_Armeni · 11.12.2007, 01:42 PM

Wow, that is awesome runtime. The higher voltage is really where it's at. I guess Iget about 20 min on my 9XL, MM, and 4S 5000 mah combo (have yet to really time it), and you're doubling it, with a higher kv motor! That motor is probably more efficient and that helps but even so, wow.

lincpimp · 11.12.2007, 04:12 PM

I was suprised at the runtime too. I have the other revo with a center diff and a 7xl and it gets about 25 mins on the 4s 5k batts. I need to gear it down, it has 20/40 gearing, may go back to the 20/46 as I found some spare spurs lying around. I also have 4 3600 2s lipos that I will make 2 7200 2s packs out off. They are longer than the 5k packs, so the emaxx trays will have to go and some other type of tray fabricated.

teknorc · 11.12.2007, 07:42 PM

lincpimp,
Glad you're liking the conversion. That is some seriously great run time. Your temps look great too. Sounds like you got the clutch thing figured out. Like Matthew_Armeni suggested, make sure the shoes are in the leading position. The clutch shouldn't really get over 130-140f unless there is some other issue.

On the gear mesh choices, if you want a taller ratio, just use a smaller spur gear. You should be able to fit a 17/36 or even an 18/36 in there.

Brian-G, Serum,
I understand the skepticism, but until you've driven it, it's hard to see the benefits of using a clutch system. It actually costs more for us to produce the kit to use the clutch, because there are more parts to produce. Once set up, there is little if any maintenance that needs to be done to the clutch. I'm speaking from over a year of testing experience and results.

BTW, I may have mentioned before, but the slipper clutch is not the same thing as using a nitro clutch. A slipper is a simple friction/threshold setup – no slipping at low RPM, the more power or RPM, the more slippage and heat. A centrifugal clutch on the other hand is quite the opposite – slipping at low RPM, the more power the less slippage, to a point of course. Only under extreme power will the clutch bell begin to slip again, which is perfect. You have the low end drivability, great traction, you still have awesome acceleration and mid range punch, as well as a little protection under extreme load. It’s a different driving profile and much better suited for larger vehicles.

Our goal wasn't to save every last bit of rotational mass for a straight line speed run, the goal was to create the best driving experience for an electric MT, on or off the track. That said, there is no question that it will keep up with any Revo or other electric MT down the straight.

It seems you've already made up your mind about it, but now you know some of the reasoning behind why we developed the kit the way we did.