Improving the MRSlotcar 1/32 Patriot EVo chassis - Printable Version

+- SlotRacer Forum (https://slotracer.online/community)
+-- Forum: Racing (https://slotracer.online/community/forumdisplay.php?fid=27)
+--- Forum: Tips & Tuning (https://slotracer.online/community/forumdisplay.php?fid=22)
+--- Thread: Improving the MRSlotcar 1/32 Patriot EVo chassis (/showthread.php?tid=1236)

---

Improving the MRSlotcar 1/32 Patriot EVo chassis - chrisguyw - 22nd-Apr-20

In my initial review, (in the 1/32 section.....Oct. 2019) , I did mention a couple of things that I felt held this chassis back from being an "Elite" competition chassis. While it is very good out of the box, especially for the less experienced scratchbuilder (it has a wide range of wheelbase/guide lead / body mount options ) it does not have an adjustable front axle vertical adjustment, and it is torsionally a bit (way) too stiff, which limits ultimate rear tire grip........don't get me wrong. it is quite good, but, everything can be improved 

I have not yet remedied the adjustable front axle issue, but have done the mods. to allow for some torsional movement in the chassis...........both these mods. are being addressed on future MRSlotcar chassis releases (it may be a while) , but, in the mean time you can incorporate these if you wish..

Cheers
Chris Walker

In the first pic. you can see that on the stock chassis, that the guide mount, is part of the front axle carrier/wheelbase adjustment plate, and when bolted snug, as it has to be to secure the guide, the whole chassis becomes very (too) stiff torsionally




To remedy that the guide mount plate needs to be cut from the front axle plate and mounted separately and securely

In the next pic. you can see the guide plate has been cut and soldered to the base plate....(2 holes in the actual guide mount plate and the 2 different length guide tongue bits allow for 4 varying guide lead dimensions)

We can now have the guide solidly mounted, with the ability to add some torsional flex to the front axle/wheelbase plate.



In order to maintain perfect alignment of the front axle holes, I cross braced the front axle plate, before, cutting the guide mount section away.

Modified front axle/wheelbase plate...



To achieve some torsional flex in the front axle plate, I used some silicone washers on top of the axle plate, and under the Nylok nuts....these should be adjusted to be snug, but, not tight enough to compress the washers.

In a perfect world, it would be nice to have washers above and below the front axle plate, but, without a major re design, this is just not possible.

It is hard to see, but the washers are there 



Another little thing with the out of the box chassis......if you wish to use any front tires with less than 19mm dia. there is precious little room under the guide for even thin braid......you will be OK on tracks with a bit of braid recess, but on taped/steel rail tracks it is dodgy. So a quick fix for that is to file/grind the bottom flange of the guide tube a few thou,.....if you take too much, not to worry, as it is easy to add a guide spacer.

This pic. is upside down ........the wide flange sits on the top of the guide surface.




Modified, the chassis was just over a 1/10th quicker on my track, and more progressive/easier to drive at the limit 

---