Most still run zero rebound on our track, but I wouldn't go more than 1-2mm worth. I'm using 2.5-2.8 progressive on the front, and 2.3-2.6 progressive xray springs on my xray and it runs very well.

Stiffer in the rear should help give more drive off the corner, whilst also giving a bit more steering. However, having said that, the only time I've ever used stiffer rears was when running Ride RE36 Blue tyres. (ran 2.6 Front, 2.7 rear).

I'm flicking between hard progressives, and 2.7's at the moment... normally ends up being track temperature dependent, where hotter tracks seem to prefer the progressives, and cooler linears. My thoery is that the progressives don't overload the tyre initially, so look after them better over a run. Whereas the linears are good to generate temp with colder track temps.

Hey guys, need some advice for my 2017 t4. I'm running on black CRC carpet and have the factory setup on the car with brand new Sorex 28 tires. The problem is the rear of the car whips around at corner entry. When I reduced the rear droop from 2mm to 1mm over ride height, put stiffer (27) front springs and glued the edges of the front tires it made the car more drivable but it needs more improvement, something to make it less titchy.
Thanks for any help.

First thing that comes to mind is why Sorex 28 on black carpet. Seems like double jeopardy there. The 2.7 front springs will make it twitchy as well, id you feel you need the stiffer spring try the progressive. Try more rear camber or camber gain as long as the car is not traction rolling.

I had to use the Sorex tires b/c that's all I had, I was going to buy some Jaco Blues but it looks like they are discontinued . Good idea about adding more rear camber, I didn't think about that!

You could try lowering you roll center in the rear.

when would you want to run 100 pct rebound in the shocks? curious.

Jaco blues are still available, as are the Sweep 32's and the Gravity RC tire all good choices for the black carpet

Hey so I'm using the Techra steering bellcranks. No side to side slop but there's up slop up/down. Not a massive issue cos I think I can just shim that out. What seems to be more of an issue is that left to right, the bellcranks seem to get in the way so I don't see the steering hubs and the C-hubs touch the limiters. Any way around this??

Cheers

just throwing this out there,

if anyone is selling their kit, let me know.

asphalt. Rebound tends to give more traction. Thats why the foam inserts are only used for asphalt too. It gives more rebound for more traction.

EA

ok so for high grip crc black carpet, I need to rebuild the shocks for zero rebound then?

what should I do for shocks?

Yes. Or just something less than 25%. After you run a few times it will be close to zero that way. If you try to build them with absolute zero you'll get air in them right off the bat.

I would start with 450 all around. Stock pistons.

EA

run a normal setup or one that is proven for CRC carpet high grip. Check out EA's and Robbie Dodge's setups from Stock Wars recently run at 360v2 in Rochelle NY.

Than glue the shit out your tire, like up to the flat almost. Than try different amounts of dope, 1/8, 1/4, 1/2, etc. My guess is you won't be able to go past half. Sorex 28's are waaaayyyyyy to soft for CRC black carpet especially if there's an established groove.

But yes less rear droop, less front droop, more weight forward, harder front springs, thicker oil up front, less camber, zero camber gain up front, higher roll center in the front, higher front ride height than rear. These are all things that would help with your aggressive over-steer problem from these tires.

You've given me a lot of great ideas, thanks very much. I can't wait to try them!