ZR1 w/ SLICKS

[8upZR1]

Thats a damn good goal to work on. Nothing is quite as intimidating as to know that the other guy's car is well sorted and can hook. A strong starting line advantage is so hard to overcome.

[brazilfree]

I have had 1.82-1.88s with a easy launch 2400 from my 4l80e / irs on 315 bfg dr- holds together pretty good so far- I changed the chip tonight in the trans pcm to match the 3.73s LPF did for it 15 years ago( it had a chip for 4.09s)..so we shall see Tuesday if there is a change.

[jonszr1]

the irs holds up alot better with an auto trans, less shock to the car on launch. again i am not knocking the irs setup. i just wanted a totally bullit proof piece when i have to drive 200 miles one way to go race .this car i primarily use just for drag racing. up date on the best irs time 11.722@117.50 with a1.72 60ft.. am going today with new settings to the solid rear and a new prom cal i might only get1 pass as i dont have a roll bar in her yet

[brazilfree]

Originally Posted by jonszr1

the irs holds up alot better with an auto trans, less shock to the car on launch. again i am not knocking the irs setup. i just wanted a totally bullit proof piece when i have to drive 200 miles one way to go race .this car i primarily use just for drag racing. up date on the best irs time 11.722@117.50 with a1.72 60ft.. am going today with new settings to the solid rear and a new prom cal i might only get1 pass as i dont have a roll bar in her yet

I am lucky to be in Indy as they are not as picky what tire did you have for the 1.72

[jonszr1]

hoosier 335x35 17 set at 19 lbs. tonight with the solid set up 1135 @ 118.43 mph with a 1.46 60 ft . but i only got 1 run as i broke the 11.50 no roll bar rule . now have to find a good roll bar for the car. it was fun though as the car felt like it was shot out of a cannon

[cuisinartvette]

Im not following, you dropped .4 and +1 mph?

Whose rearend setup did you buy?

[jonszr1]

.i used a different prom with fuel and timming changes above 3500 also uped the fuel cutoff to 7500.also left the line @6300 rpms. built my own with the help of some friends , but to be honest pretty much copied the one ski down it sells. and ya know what its not too bad around corners . but i am no road racer. there just is so much stuff that can break in a irs. stubb axels 1/2 shafts etc. plus the body damage if something really cuts loose . to me it just was no brainer as i had a whole 9 in laying around from an old mustang i built in 2003 . if some one is looking for a solid rear ski down it has one at a decent price that comes with coilovers is a total bolt in.my callaway z will allways have the irs in it . but the black car i use just as a daily driver and a drag car.