dfettero

What are folks running for track tires? Will be running RBF600 and G-LOC 12 pads.

bad mooofooo

I know you're looking to crank it up a notch but I couldn't believe how well the Michelin 4s did at Spring Mountain on the North track which is a pretty technical track.

Poor-sha

Goodyear 3R in stock sizes.

dfettero

I wish I was as good a driver as you. HPDE 2 .
Do you have C8 PDR track maps?

c5racr1

Goodyear 3 or 3r way better than the michelin 4s

william wyatt

Only come in 19 inch????????

c5racr1

Goodyear 3

c5racr1

Stock size....

J5isalive

NT01's, A052's, Supercar 3, Supercar 3R.

Poor-sha

Sorry I've been super lazy about updating the site. I just updated www.hipodriver.com/resources with what I have. I also updated the Pi Toolbox workbooks on the site.

Note however that a few things don't work right with those workbooks and the C8 either. GM decided to drop the yaw, outside air temp, and suspension channels from the C8. They also reversed the steering angle channel and renamed all the wheelspeed channels.

Z06Norway

check out this test ?

SPACE RACE

I need help with tire sizing for track days please. I am buying 20/21 aftermarket wheels for cruising, and would like to use my 19/20 stock wheels for racing. I plan on quarter-mile racing most of the time so I would like to set up for that primarily. However I might do a track day now and then so I need to consider that also. I don’t plan to race serious enough that I would buy special wheels for the drag strip. So can I do 245/35 in the front and the 325/25 in the rear? Is that the best setup for this use?
Thanks for the help!

Griffin9611

Just ordered F 18x10 R 18x12 Forgeline's with Hoosier A7 should be here in a few weeks
The 4's were great but not enough grip! I was going to try using my stock wheels but heard they bend super easy.

Griffin9611

Tires are
275/35R18
345/35R18

GeauxTigers1

freaking awesome man! How’d these fit and did the clear our stock brakes? Seems like there’s not a lot of info out there on smaller wheels/thicker tires. :\

J5isalive

I have 18in forgelines and it seems there isnt a ton of information out there on what you need to do to make them fit. So I will help everyone out here... I have AP Racing Brakes FYI

The front, the front pretty much clears without issue, you will want to keep an eye on the lower spindle, you *may* need to grind a little on the bottom to clearance out the threads below the spindle.

The rear... this is where things get fun lol... Brake ducting... the piece that goes inside the wheel, kiss it good bye. The piece attached to the lower A-Arm depending on your offsets you may need to clearance that a 1/4 of an inch. Heat shielding around the spindle, just go ahead and cut all the corners off of it. Suspension at full droop with no tension on the sway bar (car on a lift) the wheels will contact the top of the A-Arm, when there is tension on the sway (one side of the car is on the ground) the wheel probably wont touch the A-Arm, depending on the manufacturer of the wheel and its offsets, Now you get to play the game of "How much clearance is enough?"... break out the grinder and get to work, have an understanding of how much suspension travel you have during a track day and grind appropriately, there are already 'pockets' on top of the A-Arms for the stock wheels, you will need to expand those pockets a little more, use some grease or some paint, install the wheel, see where it rubs and grind there a little.

Honestly if I had known the headache it was to get the rears to work perfectly I probably would have ran a 19in in the rear instead of an 18in. Now that I have it sorted I am happy though.

As for tires, i just installed some Nankang AR-1's. 295/30/18 fronts and 335/30/18 rears.

milkrun

Hey @J5isalive - would you please post or message me the sizes, offsets, etc of the wheels? - thanks

J5isalive

18x10 et45 & 18x12 et57. However i run a 3MM spacer up front, and a 15MM spacer in the rear.

If your car is dual purpose i would get a 18x10F 19x11.5/12 rear.

Edited: thought this was a different thread, i mention the struggles of 18s above. However call Cicio and get a set of MCS 3-Ways, ask about getting the rear shocks droop limited to maintain distance of the wheel barrel and the upper A-Arm. Been working very closely with MCS to get these things dialed for the larger market, multiple spring rates to address all types of car setups!

JRRZR1

How many track days do you get out of the GY 3R?

Ksteckba

if driven on the limit, two track days at most.