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Quote:

Originally Posted by gubbs3 (Post 15537298)

If I see you using quarters in London then maybe, just maybe, I'll believe it's as effective. I dare you to leave your tweak station at home.

I havent taken a tweak station to the track in years....I guess thats why I suck. Maybe I need to dig it out again.

EA

Shock position & angle

Since life (and track time) is just too short to figure it all out on my own, I’m keen to know what guys think about center shock position and angle. Specifically, what is good about CRC’s relatively short, steep, and rear mounted shock as compared to XRay’s way longer, flatter, and much more forward mounted shock. Both cars seem to work great. So what’s up with their dramatically different approach to placing the center shock??

More level is usually softer suspension. Xray has that long tongue on the pod top plate. Seems to improve damping. Someone said the forward mounting was less prone to traction rolling and better for grip. I can't see how, except for moving some weight forward.

The angle in person, isn't as different as you think. The CRC is only a little steeper. Both work fine.

I have both cars. The Xray is way quicker to set droop and ride height on. The vampire E clips on the CRC shock shaft are going to put someones eye out, or get stuck in your finger.

Nothing says ouch like an e clip fully in-bedded in the flesh under your finger nail. FYI: you can't rip an e clip out. It holds on, and you'd be startled how much the flesh under your nail can stretch without tearing. You have to cut the e clip in half with rusty side cutters, and rotate each half out.

I'd like to try an Xray shock on the CRC, with another lower shock mount, mounted forward. I have a spare shock. Going to need to oven clean off the orange first.

Shock mounting R&D

https://cimg3.ibsrv.net/gimg/www.rct...e92addbee.jpeg
100% CRC kit setup on car #1
https://cimg4.ibsrv.net/gimg/www.rct...5e7f5709e.jpeg

Car #2 features a mostly kit setup but with a long tongue upper pod plate and extra long shock extension - to try and simulate the XRay shock positioning. On my next outing I’ll be running these 2 cars back to back in an attempt to try and better understand the benefits and/or drawbacks of the vastly different approaches to positioning the center shock. Stay tuned for results reporting.

I feel like the long shock causes an aggressive and sometimes uncontrollable center corner rotation

... But I too will re-test this for myself before December

I just used the shock extenion from CRC.

I tried running a similar length shock on my two cars a couple weeks ago and just changing the position from long top plate to short. The change was subtle and the best I can describe is the more rearward position was less sensitive to on/off power transition.

I've done back to back on 4 different chassis and every time feel like I gain mid to exit steering with a long top plate. I've been trying to model it to work out why but my model has become complicated and I'm only about halfway done.

I went short with my XRay and use the shortest mounting holes. Car runs pretty good on black carpet that way. Longer seemed to have too much rear traction, car was too "stuck".

Ran the R1 v21 17.5 rollout at 88mm and timing at 42
motor ran great and was really fast the whole 8 mins no fade. Also ran a long shock instead of the short shock and the Reflex car was alot better to handle and more consistant.
Thanks for all the help and sugesstions from my friends

Does anyone know of a place that makes front arms and a front bumper for the 12r6?
i think the place also made f6 parts. If it helps i think the arms they made are both sides together one piece.

Quote:

Originally Posted by vafactor (Post 15537757)

As promised, here’s the post outing report of my testing result short vs long shock. In a word, inconsequential. Lap times between the two cars were nearly identical and the driving feel wasn’t much different either. If anything, the short shock car was perhaps a little sharper and more immediate to respond, while the long shock felt just slightly smoother. Notably, I wound up using a much stiffer spring on the long shock - probably because the pivot ball on the long shock’s extended tab upper pod plate moves as much down as it does foreword. So the force applied to the relatively flat long shock is more indirect than what the shorter steeper shock sees. That’s my theory anyway. So I guess there’s a good reason why the CRC team guys always tend towards sticking with the standard kit’s shock geometry. For me anyway, there didn’t seem to be any advantage to trying a more XRay like longer and more forward shock positioning. My 2 cars are now back to the tried and true ‘normal’ shock positioning.

I tried the long shock again, but on a new layout at Prolevel. It seemed to calm turn in very slightly. It also increased mid out slightly. Seems like a give a little, take a little balance, lol. Was definitely easier to drive and no slower. I'm still trying to get that fall off lessened though, lol.

I'd like to discuss side spring preload. Historically, I've never liked it. I would rather go up to the next rate. Lately though, specifically since we've been running spools, preload has been creeping more and more into my setup.

I pretty much always run 1-1.5 turns of preload. I think it holds it's tweak better if nothing else and it flattens the spring out on the pod plate, if you run no preload only half of the spring is really touching the plate.. seems counter productive to me