i found my diff fromt he kit also had this issue, there was a very tight fit on the pin that went through the outdrive that sat on top of the large washer. I think it is due to the o ring. i found the kit o ring was a little bit big. i managed to squish it all in and there doesn't seem to be a problem with the diff...but i only used it for 1 litre or so.

Not the o-ring, it was tight with just the shaft in, and when I say tight, I mean like binding up in a major way, and not just a little hard to spin.

Well, at least there is no play. But this can be easily rectified by polishing the shafts. The shafts has to rotate free without play.

Maybe a 6mmm reamer will do the trick?? I don`t know the shafts diameter though.

Greg get a new housing and internal, standard MTX5. FILL TME RIGHT UP with heavy oil so that your diff gears dont need to work hard at all and work from there. If Jeff did 93 laps, do what he is doing!

diff
 

out drives were that tight you needed strong hands just to turn them they were not that tight when we put kit together
greg

Just weighed my car with 1450 life, one low profile servo (throttle), some ti screws, steel rear diff and it came out to 1705 grams!!:eek:

It seems like the only option for me is maybe finding a 700 mah life battery (if one exist), Titanium pivot balls, and a low profile steering servo. I am not a big fan of the Low profiles for steering as they seem a little too slow for my taste but if i'm gonna make it anywhere close to 1525 , ive gotta loose weight!

I was told that when using low profile servos, you have to add weight in order to balance the car laterally. How does yours balance?
I think I know you from RAMS, it will be good to see a few Mugens at NorCal.

double post

i recently purchased the mugen Ti pivot balls (full set). compared to the steel pivot balls the Ti's are 9.3 grams lighter.

with two sanwa VZ servos weight = 120 grams (shortened wires)
with a Sanwa vz and a ko low profile servo = 102.1 (shortened wires)
with two ko propo RSx one10 servos = 101.8 (non shortened wires)
considering you are using lipos you would want to use the ko propo RSxone10 low profile servos.

i have recently eliminated my reciver box and novak regulator. with these items off the car i saved 25 grams.

depending on what servos you use with the above changes you can save 34.3 to 52.2 grams

add to this a full Ti screw kit and you might save another 20 or 30 grams.

add to this ceramic bearing kit and you save more weight. maybe another 10 or 15 grams.

take away the centre weight = another -18 grams.

total of 82.3 grams to 115.2 grams

other options:
-Ti turn buckles
-Capricorn mtx4 cvd shafts
-capricorn Ti arm pins
-nylon pivot ball nuts
-smaller receiver battery
- light weight engine heatsink

I'm a little surprised anyone is having trouble being light, possibly choice of running gear, but I'll have to recheck mine once it's ready to go again, as I did notice my new engine is a shade heavier, and the metal rear gear diff is likely to bring up my weight up a bit.

so has this diff issue been resolved for you guys? I havent had a problem yet...

Hello everyone, the new parts are in from A PLUS RC Products and the Only hobby shop in the USA to have them in stock too sell. The company makes parts for most cars, pullies, arm mounts, servo savers, sway bar mounts and cluches, (clutches have been proven to work)./ A-Plus clutch was used and podiumed in the A main at the Florida Winter Nats three weeks ago.
The pullies are also HARD anodized and the parts are anodized Blue and look nicely machined.

The parts we have now are for the RX8 1/8 X-RAY & MTX5 1/10 Mugen.

We also have the newest tecnology of clutches for 1/10 and 1/8th universal clutch.

I know I will have on my new car, my mugen one work well and these look lighter..

Please go to www.acornracingusa.com for info on the NEW product and other nitro on-road racing product need.

A-Plus products are up on the site now, but I am waiting to recive pricing to post and pictures to add on the site by tomorrow, I hope.

The web mail order is open to use and the inventory is live and accurete. I am a little behind but reciving packages everyday to add invetory.

The grand opening of the site is March 16..

ACORN is for the serious 1/10 & 1/8th On-Road nitro racer.

Thank you Billy

diffs
 

i have no idea what was wrong with the other 2 diffs but new ones are really good and car has some roll now steel in back and the original ones in front plastic still looks good
greg

is that another Shing production?

Think I might be able to make it to the Montica race next weekend , if its not raining...