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Half-Mile / Race the Runway 2017

4K views 16 replies 12 participants last post by  evil ken 
#1 ·
Hi to all,
I’ve register to the half mile race that will be happeningon Saturday the 12 August (still far). But I was wondering if any of you everdid this test or heard or saw any 8th Gen Impala’s attempting thisrace?
I’ve ordered 4 Continental Contact Sport 225-50-17 (PN:15507090000) that are W rated tires (Max speed of 270KM/H (168MPH)). Because ofthe tires, Trifecta will be able to legally have my limiter max speed set at260KM/H (162MPH).
My best ¼ mile (400M) trap speed was 106.9mph; I’mwondering what an extra ¼ mile will bring a street legal, drive-in, drive-outto this event will do? Except for a nice wax job, I’m not planning to do any aerodynamicsalteration to the car. New suspension parts, new brakes and tires should makethis car stable at over +240KM/H (149mph)
I don’t know about the US Impala’s model, but the Canadian 8thGen’s was factory limited to 180KM/H (112MPH) and the 9C1/9C3’s are limited to190KM/H (120MPH). All I can tell you that I already drove the car past ++220KM/H(137MPH) late one evening, but for legal reason, I did not post the video onyou tube.
If temperature will cooperate, I should have a video(s) toshare will all of you (inside and outside view), and I hope to be the fastest 8thGen Impala in the world regarding the half-mile. Maybe one day I will go theTexas full mile race.
FYI, I’ve ordered custom camshaft’s that I’m (for now)keeping the specs secret and a set of MACE performance 100lbs Gas Nitridetreated beehive spring valves kit with all titanium retainers. But I still didnot do anything regarding the OEM horse-shoe shape down pipe. Just waiting for this crappy winter seasonto be all over.


 
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#2 ·
Good luck and be sure to report back how it goes.

Have honestly not pushed it with our 2012 lt.
 
#5 ·
Factory limiters are setup based on tires offered from the factory, for non-performance cars 108 or 112 usually.

Far as top speed runs I really don't know enough about the car but be aware gearing can limit you beyond peak rpm. If the gearing isn't right you can have the engine below peak power when the wind stops you. Even if the gearing works OK I doubt you would hit 160ph. Aerodynamic drag increases greatly with speed, look at what your 1/8th mile mph is compared to 1/4 mile, rate of acceleration falls off dramatically.

Let us know how it goes.
 
#6 ·
The top speed for the 2012+ police cars was like 148mph, I believe. But the police version has a custom tune as well. I doubt that you'll get one of these over 150mph, even with mods... I could be wrong though!

Sent from my OBOOK 11 PLUS DUALOS using Tapatalk
 
#7 ·
Read somewhere that the factory equipped car(2012 lt) was "capable" of reaching 158 mph with speed limiter removed and appropriate tires, that was NOT with any mods. Think the 13 should be about the same, however I don't know how fast I would feel comfortable taking one of these cars on a track without some suspension work and better brakes. I have been upside down before watching the median grass in my sunroof at over 80 and that is not much fun, got bumped on the front end by some jerk on I4 just outside orlando Fl nearly 30 years ago.

Does not take much without proper suspension at speeds over 120 to get squirrely real fast.

The goodyear tires on these cars from the factory were rated to 112, no way after I saw how those tires were coming apart at around 40k I would even think of trying it with them.
 
#15 ·
The goodyear tires on these cars from the factory were rated to 112, no way after I saw how those tires were coming apart at around 40k I would even think of trying it with them.

The OEM Goodyear Eagle tires on these cars are absolute crap, compared to my General Tires. I would never go that fast with those crappy Goodyears. At those speeds, good tires and good brakes are essential for survival. :)
 
#10 ·
I wouldn't both with a low tank for 1/2 mile, if baffling is good it can help a tiny bit for shorter drag racing but I suspect this is more about mph than ET and if the sustained acceleration causes the bucket to go dry and impacts power it will hurt mph more than the 30lbs saved helped.

My Caprice had horrible baffling and had to keep the tank solidly over half a tank or it would run dry for a moment after the launch, usually 5/8 of a tank was my minimum.
 
#11 ·
Thanks for all the replies, I guess we will all have to wait to see what my 8th Gen Impala will trap the 1/2 mile. I search to see if any 8th Gen SS ever did the 1/2 mile and all I could find is 1/4 miles and max top speeds that some did. The way I see things, I trap the 1/8 at about 80ishMPH, the 1/4 mile at about 105'ishMPH, so let's hope I will be able to trap about 130/140ishMPH. Got to be realistic here, I really doubt I will be able to reach my tune max speed limiter at 162mph. But we will see what happens, never know, maybe the DA will be very good and help the 3.6 gain a few more HP.


But, that's in August, my favorite track opens on the 22 April. will probably attend 15 days this season, will keep you guys posted if I ever beat any of my personal best.


Unlike the 1/4 mile, the 1/2 mile event does not count the time it takes, only the trap speed at the finish line. I have a device to calculate the 0-60, 0-100, 1/4 mile, etc. I will check if it has the 1/2 mile on it??? Again, very hard to know how long it will take, but my best guess, it will take around 23 seconds? (13.5ish 1/4 mile + 9.5ish the extra 1/4 mile).
 
#14 ·
Assuming you hit the 1/4 ~105MPH, you're covering 154 ft/sec. Which would be an additional 8.6 seconds for the second half if you kept it at that speed. I'm betting 7.5 seconds to complete that second half.
Put me for a nickel that you do it in 21 seconds total :)
 
#12 ·
#17 ·
Hi to all,
I?ve register to the half mile race that will be happeningon Saturday the 12 August (still far). But I was wondering if any of you everdid this test or heard or saw any 8th Gen Impala?s attempting thisrace?
I?ve ordered 4 Continental Contact Sport 225-50-17 (PN:15507090000) that are W rated tires (Max speed of 270KM/H (168MPH)). Because ofthe tires, Trifecta will be able to legally have my limiter max speed set at260KM/H (162MPH).
My best ¼ mile (400M) trap speed was 106.9mph; I?mwondering what an extra ¼ mile will bring a street legal, drive-in, drive-outto this event will do? Except for a nice wax job, I?m not planning to do any aerodynamicsalteration to the car. New suspension parts, new brakes and tires should makethis car stable at over +240KM/H (149mph)
I don?t know about the US Impala?s model, but the Canadian 8thGen?s was factory limited to 180KM/H (112MPH) and the 9C1/9C3?s are limited to190KM/H (120MPH). All I can tell you that I already drove the car past ++220KM/H(137MPH) late one evening, but for legal reason, I did not post the video onyou tube.
If temperature will cooperate, I should have a video(s) toshare will all of you (inside and outside view), and I hope to be the fastest 8thGen Impala in the world regarding the half-mile. Maybe one day I will go theTexas full mile race.
FYI, I?ve ordered custom camshaft?s that I?m (for now)keeping the specs secret and a set of MACE performance 100lbs Gas Nitridetreated beehive spring valves kit with all titanium retainers. But I still didnot do anything regarding the OEM horse-shoe shape down pipe. Just waiting for this crappy winter seasonto be all over.


You have the best tire for our cars. i have the extreme contact dws and they are super solid at high speeds and braking. Grips pretty well too. Good luck on your run.
 
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