- TOP Racing Photon EX - Micheal Hanulec - Jackson RC - 12.05.2012 -



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A few questions about your most recent 17.5/Jackson setup...

You have listed - Plastic arm mounts (roll centre inserts) as M and the steel insert as M also, does this mean M low or M high (No medium available, if you know what I mean)

And on that, if I assume its with the insert in the low position and use the kit roll mounts and inserts (EX) I would use 0.5mm shims on the chassis to achieve the same roll centre... Right?

Also, you are using the 'optional' camber plates, if I wasnt to use the stock ones (EX) what do I need to do to the setup?

I ask all this because i have not really run the car before and will be going away to race shortly (with no track time between now and then) and want a decent base setup for a med. grip asphalt track. Its pertty tight, but I think the jackson setup would work good from the videos I have seen.

The biggest problem I have with the kit setup was loose rear end (on a low grip fast flowing track). I wont have much time to set the car up and as long as its balanced, i can get the car around qyuickly enough.

Thanks in advance....
Phill


Hi Phill - a few thoughts..

the arm inserts that come with the kit are centered and allow for a button head screw. i'm trying to use these whenever possible vs the old high/low inserts that had a tendency to 'spin'. if these centered inserts spin it won't be that much of an issue.

arm holders- w/o buying anything additional, using the kit high plastic arm mounts with centered inserts and zero shims will get you within 0.4mm of why my hinge pins are. im using the medium plastic + centered insert + 0.5mm of shim.

the optional camber plates is basically a carry over from the Photon. they worked really well over there. it will provide an inbetween position as compared to the stock option. i had to drill these carbon plates as they where really designed for the 2.5mm bulkheads. w/o running these, i'd choose to run the 'stock' ones, in the long position w/o 1mm less shim (the thickness difference between the carbon and metal parts is 1mm)

if the car is loose try two things:
1- lengthen the rear wheelbase
2- add shims to the front upper camber link -- do something drastic like add 2mm from where ever you are to see if it helps
3- stand up the rear shocks and/or try a harder rear spring
4- worst case, remove the two 'rear' screws from the top deck to the motor plate.

i have to say i'm really excited about the setup i have on my car now. i'm going to try some other changes this weekend --- our final opportunity before leaving for San Fran and the Reedy Race.

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