[ZR1] Two ZR1s, Three Drivers, 45 Quarter-mile Passes—Our Report
04-11-2009, 02:55 PM
#23
Race Director
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I would be very cautious about putting drag radial on the ZR1 unless and until you make a bunch of passes on the stock tires. It is very easy inadvertently to toast the LS9 clutch on an aggressive launch with a sticky tire.
After my due diligence, I chose the Hoosier P315.30.R18 drag radial. Hoosier warns against using that tire on the street.
Ranger
After my due diligence, I chose the Hoosier P315.30.R18 drag radial. Hoosier warns against using that tire on the street.
Ranger
04-11-2009, 04:40 PM
#28
Instructor
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I would be very cautious about putting drag radial on the ZR1 unless and until you make a bunch of passes on the stock tires. It is very easy inadvertently to toast the LS9 clutch on an aggressive launch with a sticky tire.
After my due diligence, I chose the Hoosier P315.30.R18 drag radial. Hoosier warns against using that tire on the street.
Ranger
After my due diligence, I chose the Hoosier P315.30.R18 drag radial. Hoosier warns against using that tire on the street.
Ranger
04-11-2009, 05:20 PM
#32
Drifting
A fabulous car, that’s hard to drive well for max acceleration. That’s why the car magazines haven’t shined with it. The torque of the motor is huge, presenting a challenge to avoid excessive wheel-spin. The solution involves heated tires and a progressive throttle-squeeze in first gear. But loss of momentum via bog has disproportionate, adverse impact on the 60’, 330’ and ET. GM set the ZR1 first gear ratio at 2.29 vice the Z06’s 2.66. That difference looms large in making torque at launch somewhat more manageable and allows the ZR1 to reach 67 before the shift. But it penalizes a loss of momentum more in the ZR1 than in the Z06.
Ranger
Question on the gearing. I do not understand the comment on "loss of momentum". Does this mean the shallow gearing in the first three gears limits the elapsed time? Would the car benefit from steeper overall gear ratios at the drag strip?
04-11-2009, 06:06 PM
#34
Drifting
Nice work! Thanks for the time and effort to put this together. So is a ZR1 in your future?
04-11-2009, 06:16 PM
#36
Team Owner
04-11-2009, 07:27 PM
#39
Temporary Hold
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Great job guys! Thrilled everyone made passes and worked on their skills! I agree the times will come down nicely with great DA!
Well done.
Well done.
