moparSRT

Ran my 2K18 all weekend at the super tight and technical 386 Raceway for FSEARA race #2, set it up for USGT, replaced my asphalt diff (1k) with a 7k diff, car was easy to drive and very consistent, a little under powered with the trackstar 21.5 motor but still fun, just getting it ready for the snowbirds 25.5tc class.

Ended up breaking both front arms, one on saturday practice and one in the first qualifier on sunday ... did take some hard hits so cant really complain but might switch to the older arms which have been proven very durable on carpet Ran the same car at 386 just a few weeks ago in 21.5tc with the same layout without any problems ... could be stress cracks over time, either way there are a lot of front arm options

LzREngineering

Looks like there's a weak spot around the ARB mount? Good job it's only $4.25 for a pair of front arms! Are the older arms a slightly different length?

moparSRT

Its not the $$$ im worried about, the DNF sucks.

The older arms are 0.5mm narrower, I did a arm comparison couple post ago, the older arms are available both graphite and regular while the 2k18 arms are only graphite at this time.

theproffesor

iTrader: (63)

moparSRT

I have run this car on asphalt and bigger carpet tracks without any failure, 386 is tight, its a awesome track that teaches how to drive the line but if you miss it your hitting something, my 2014 which also has graphite arms went strong all weekend. With all that said i think I will run the older arms at the Snowbirds.

BullFrog

iTrader: (4)

Watched Mopar's car all day long as I was turn marshalling his race and ran strong against the field. He got hit a few times and the pipe sometimes are not forgiving ( as my F1 car found out). This car works great and against more expensive chassis.

theproffesor

iTrader: (63)

LzREngineering

Just looking at weight-saving options. Does anyone know if the plastic 20t pulley and alu spur gear adapter from the Sakura XI fits on the 2k18evo?🤔

Marcos.J

iTrader: (221)

top photon one fits its plastic
https://www.t2shop.de/WebRoot/Store1.../TC-PMLS02.jpg

moparSRT

2k18 pulley fits the XI so i'm sure it works the other way around too.
You can also save some drive train weight using these SAK-U122A Gear Differential Outer Joint

Why worried about all this weight saving ?? You don't have a minimum weight rule ??

LzREngineering

Min weight over here is now 1320g. I'm at 1350g with light weight 6400 batteries & pro-lite body (incl 10g balance weight). I'm sure there will be some xray t4/awesomatix drivers getting close to 1320g with the big 8400 batteries which give even more power.

Good to know that a lot of the old composite/Ali parts will fit. I want to loose about 30g total - changing all screws to aluminium will save 32g alone.

LzREngineering

First outdoor run today @ Bedworth Raceway:
Track was damp all day long and temperatures were around 7 degrees C. Car was ok, but both lacking steering and at risk of suddenly spinning out on power. Not unusual for the conditions!
Moving font shocks in 1 hole helped, but still not quite up to the pace of my old car. I was running 2k oil in diff and 600 in shocks, too thick at winter temperatures. Anyone got a wet setup yet?

Also did some more carpet running on Friday, car is starting to settle down but very sensitive to droop changes - need to get a precision droop guage.

moparSRT

Ran the 2K18 last night at our local monday night club race @ Quaker, temps were in the high 40's, testing 26mm tires for our new RCGT class ... broke both front arms guessing the cold temps didn't help with the very stiff graphite arms, ended up installing SAK-U101 arms, just had to swap one of the shims from 2mm to 1mm
SAK-U101

Nicadrauspro4

Those arms definitely have a design flaw. The pattern in the broken arms seen in this thread are all in the same weak points. 3Racing must come up with a reinforced and redesigned arm.

zxcvb1t

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