Cat SX3 not enough pack and car chassis slapping
 

As per title, new owner of the sx3 what kind of pistons should I be using as the car just doesn't have enough pack and bottoms out far too easily for my liking, running 4 hole on front and 5 on the back with 35 AE oil front and 30 on the rear, any ideas?

Try smaller or less holes.

With BB I find 5-hole 1.3mm (Fronts) & 5-hole 1.4mm (Rears) are a good starting point for most of my cars (FS2, 410, DB1 etc...)

I normally start with 40wt Front & 30-35wt Rear

mine was doing that, try 4 hole pistons
were you not running alot of weight in?

I'm running
4 hole front losi 37.5 oil 4lb spring
And rear 5 hole losi 32.5 oil 2.5lb spring

Running weight was 1790g so plenty heavy enough. I reckon I'm gonna try the 3 hole pistons like people do with the sv2. Same shocks aren't they so that's a good starting point. Just feels far too soft with 5 hole and 4 hole. I'll up the oil too prob 40/35.

If your running on astro try 3 hole, 450, 4lb spring on the front and 3 hole 350 2.5lb spring on the rear as a starting point

That's what I'm running spring wise already I'll get the three hole pistons and up the oils and it should solve that. The rear indide wheel coming up on hairpin turns and Grip rolling at high speed sweepers seems a problem too....?

Try the 3 hole front and back but, drill the rear out to 1.65mm if you can.

Sounds like its just far to soft