Test and Tune at Gainesville drag strip - ZR-1 Net Registry Forums

aafc · 07-25-2021

After I had my headers modified so I could remove transmission without removing the headers to have the torque converter made looser (higher rpm for launch) off the foot brake. Went to Gainesville raceway for test & tune ( only
open for drag radials and slicks) NO STREET TIRES! I was able to make 3 runs
about every 30-40 min between runs. Temp 94+ deg ,they did drag the track
prior to making runs.
Before I had the converter made looser I could only launch at 1800-1900 rpm.
with the looser converter I started out leaving at 2300 rpm first pass.

Each run tires were set at front 40lbs, rear set at 18lbs

Run 1
LEAVING @ 2300 RPM R/T .157 - 60FT 1.642 -330 4.848 1/8 7.527 @
91.00MPH 1/4 11.891 @111.70

Run 2
LEAVING @ 2500 RPM R/T .037 - 60FT 1.606 - 330' 4.788 - 1/8 7.458 @
91.14 - 1/4 11.849 @ 105.47

Run 3
Leaving @ 2700 rpm R/T .080 - 60FT 1.628 - 330' 4.814 1/8 7.489@
90.58 1/4 11.858 @ 112.01 ( TRACK GOING AWAY SPUN)

Run 4
Leaving @ 2700 spun real bad abort run I even tried dropping rear tires to
17lbs
No sense beaten car up if I'm losing traction. So I set the tires for the
drive home.
Well i found that I can leave at a higher rpm off the foot brake, just need
more seat time in the car.
Next test and tune (NO STREET TIRES) AUG 14th ORLANDO SPEED
WORLD

Young1 · 07-25-2021

Dang man. You are becoming a consistent bracket racer.

Jagdpanzer · 07-25-2021

Nice 60s. What tire, rear gear, and engine mods?

Sent from my iPhone using ZR-1 Net Registry

aafc · 07-25-2021

Thanks I'm just haven fun once in a while.
My last ride was in Gator national 1988 march. I ran a B/ED dragster with a
340 cu.in. we were running 7.48 @ 175.00 mph when I quit racing.

So I'm trying bracket racing for fun.
Car 1990 ZR-1 #2546 368 cu in LT5 by South Georgia Corvette. 2009.
motor makes about 525@ crank and 418 to rear wheels. Rear tires are
M/T ET Streets SS 315/35/17, front rims are stock ZR-1 rims that have been
narrowed to 6in with Hoosier 26x50RT17 74H
Transmission 4l8OE 2.74 first gear, 2nd 1.57, 3rd 1.1 4th .75. rear end
3.73 and QA1 Shocks single adjustment.
Still learning how to leave the line using foot brake instead of a transmission
brake.
Next race is at Orlando Speed World Aug. 7

07-25-2021	#1
aafc Join Date: Feb 2010 Location: Ochlocknee, GA Posts: 435	Test and Tune at Gainesville drag strip After I had my headers modified so I could remove transmission without removing the headers to have the torque converter made looser (higher rpm for launch) off the foot brake. Went to Gainesville raceway for test & tune ( only open for drag radials and slicks) NO STREET TIRES! I was able to make 3 runs about every 30-40 min between runs. Temp 94+ deg ,they did drag the track prior to making runs. Before I had the converter made looser I could only launch at 1800-1900 rpm. with the looser converter I started out leaving at 2300 rpm first pass. Each run tires were set at front 40lbs, rear set at 18lbs Run 1 LEAVING @ 2300 RPM R/T .157 - 60FT 1.642 -330 4.848 1/8 7.527 @ 91.00MPH 1/4 11.891 @111.70 Run 2 LEAVING @ 2500 RPM R/T .037 - 60FT 1.606 - 330' 4.788 - 1/8 7.458 @ 91.14 - 1/4 11.849 @ 105.47 Run 3 Leaving @ 2700 rpm R/T .080 - 60FT 1.628 - 330' 4.814 1/8 7.489@ 90.58 1/4 11.858 @ 112.01 ( TRACK GOING AWAY SPUN) Run 4 Leaving @ 2700 spun real bad abort run I even tried dropping rear tires to 17lbs No sense beaten car up if I'm losing traction. So I set the tires for the drive home. Well i found that I can leave at a higher rpm off the foot brake, just need more seat time in the car. Next test and tune (NO STREET TIRES) AUG 14th ORLANDO SPEED WORLD

07-25-2021	#3
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,659	Re: Test and Tune at Gainesville drag strip Nice 60s. What tire, rear gear, and engine mods? Sent from my iPhone using ZR-1 Net Registry __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

07-25-2021	#4
aafc Join Date: Feb 2010 Location: Ochlocknee, GA Posts: 435	Re: Test and Tune at Gainesville drag strip Thanks I'm just haven fun once in a while. My last ride was in Gator national 1988 march. I ran a B/ED dragster with a 340 cu.in. we were running 7.48 @ 175.00 mph when I quit racing. So I'm trying bracket racing for fun. Car 1990 ZR-1 #2546 368 cu in LT5 by South Georgia Corvette. 2009. motor makes about 525@ crank and 418 to rear wheels. Rear tires are M/T ET Streets SS 315/35/17, front rims are stock ZR-1 rims that have been narrowed to 6in with Hoosier 26x50RT17 74H Transmission 4l8OE 2.74 first gear, 2nd 1.57, 3rd 1.1 4th .75. rear end 3.73 and QA1 Shocks single adjustment. Still learning how to leave the line using foot brake instead of a transmission brake. Next race is at Orlando Speed World Aug. 7

07-25-2021	#2
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 896	Re: Test and Tune at Gainesville drag strip Dang man. You are becoming a consistent bracket racer. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.