FU_I_AM_UltraZ

iTrader: (20)

Unfortunately I'm racing at the crummy 1/8 tear down track ... Qualcomm's Race Legal, but I'm running Hoosiers DRs 275/40/17... waaaaaay better than street tires... but with my suspension mods... i'm only netting a 2.0 60ft. i know i should be close to a 1.6 60ft.

Who is running the m/t ET street radials 275 40 17s? I'd rather not buy 15in wheels/tires yet if ppl are having good results with m/t 17in DRs. My car is a stick so..
IF you have a fbody 6spd and running those m/t DRs... please let me know your 60ft results and what rear shock are you running.

Thank you
Charlie


my suspension mods... tunnel mt tq arm, 3 pt sfc, lca, adj phb, slp springs 3/4in lowered. bilstein shocks in fronts agx gas adjust in rear. they are weak so thought it would work better for squatting.. poly sway bar end links, stb.

93camaro_zzz

iTrader: (13)

You should roll out to Barona with us sometime.

FU_I_AM_UltraZ

iTrader: (20)

when they build the 1/4 mile yes.. but i think their test n tune is over for the season...

Bitemark46

That might be your problem. For the rear to work correctly you want to the rear to stay neutral. Squatting is bad as it unloads on the tires and causes wheel spin. If you can try and stiffen up the rear.

What is your tire pressure? When I ran my old nitto DR's I used to get them down to 14psi cold. John Force burnout then quickly stage. This netted an average of low 1.8's with a best of 1.74 on a 17's.

Are you preloading the drivetrain? This helps reduce the shock to the tires.

-Mark

White6SpdZ28

iTrader: (6)

1.7 60ft on 275 40 17 nt05rs. Have a 9 in with spohn lca and tunnel mount torque arm. 18psi with not a huge burnout. Dead hooked. Stock height stock shocks leaving at about 4k

guppymech

iTrader: (7)

Everything I've read says that M6 cars do better with a bias ply tire. For the track I run a MT ET Street 26x10.5-16 on stock steel wheels, without inner tubes (weighs 8-9lbs less than my TTM/275-17 radial street setup per wheel). 1.81 60' stock suspension with only BMR lca relo brkts, 13 psi launching at 3500-4k no spin. The bias ply sidewall even in a 16" is very forgiving, really feels planted. If you're just going to use them at the track look into a bias ply and keep the DRs you have for the street.

93camaro_zzz

iTrader: (13)

They run their test and tune all the way through december.

FU_I_AM_UltraZ

iTrader: (20)

preload with a stick...? my hoosier drs i think i had at 13psi after a few passes thats what i dropped them down to... I do have some bilsteins collecting dust... i'll try swapping them out.

FU_I_AM_UltraZ

iTrader: (20)

well i still have a 10 bolt lol but was thinking of the mt et bc they are 2 ply and i have plenty of 17in matching wheels lol if i get another set of wheels it would be 15inchers

FU_I_AM_UltraZ

iTrader: (20)

let me know when you guys go but if anyone is bringing a truck.. can i throw my slicks in the bed?

Bitemark46

Preloading is removing the slack in the drivetrain to reduce the shock to the tires that stick cars give.

While in gear and the clutch pedal to the floor. Slowly lift the pedal until the car starts to move. Then push it down slightly. Hold it there until the tree comes down.

Not the greatest for clutch life but it helps traction with a stick car and a hard sidewall tire.

-Mark