Rear-end is kicking up on truggy, fix?

[Finnster]

Ok Cool, found my setup:

Originally Posted by Finnster

I have the rear LXOne shocks installed in the back, but have not cut any coils. 30wt oil. Still waiting for the F springs to come in to finish it.

Ran it a bit in some rough sandy areas, and the back seems pretty good so far. It does sit a bit high, and I noticed it tended to roll on asphalt were it would hold or slide before. Its def got to come down a bit.

Otherwise I was looking at getting some lighter springs as well. My .5 has the OFNA Ex chassis and small 3S 2500 batts, and @ ~2000g+, may be lighter than some RCM ext chassis conv. Anyway...

I couldn't find a rate for the std yellow LX1 springs. So I tested it and came up with a value of 76 gF/mm (or 4.26lb/in, 0.75 N/mm (trx style).)


Spring rate converter FTW

I also found an HPI Spring that fits well. Now the package rates that as 71 gF/mm (3.96lb/in, 0.70N/mm) but I tested that as well and came up with 59 gF/mm (3.3lb/in, 0.58 N/mm.) IDK why I came up with such lower values than HPI did. My method was slightly crude, but was very reproducible.

Shouldn't matter too much, as I just wanted to get a relative rating to the other springs in that series for the Hellfire. The blue spring I used was softest, while the OFNA yellow spring seems closest to the HPI silver (soft) spring FWIW. The springs are long @ 80mm vs ~72mm for the OFNA's, but both need to be cut down anyway.

GO-Ride: How do you determine what length to cut the springs too? Why wouldn't you cut them short enough to use the stock shock mounting holes? LMK, as I don't want to trim any springs until I am sure on what I am doing. Thanks

Then later I tweaked it:

Originally Posted by Finnster

I took the .5 to the track and was happy with the mods. I used pink jato springs in front, and cut down blue HPI springs listed above. 30wt oil all around.

RCM Mike also took a look at the mod and was impressed by it. Good job on the thumbs up from RCM!

After some discussions w/ Mike, it was decided the oil could go down slightly in the F and up in the rear. I'm going to go for 27.5wt in F, and 35 in the R and go from there. I'll have to take a 2nd look at the yellow springs as well. Race weight is 1950g for my .5.
...

So looks like I have quite soft springs in the back, and I did go to 35 in the rear. Huh...

ok.. So now I'm thinking maybe keep the 35wt or so, and go up slightly on the spring. I want to lose a bit of R traction as its a bit too planted and could slide a bit more in the turns. Chassis does slap a bit much in the back imo. Sound reasonable? The F I have down just perfect, but the rear is not quite there yet.

Thanks for the interweb again. I know I wrote this down on a setup sheet last year, but who knows where that went to...