Who has done a 1/2 mile race?
10-17-2016, 08:43 AM
#3
I have with my car on 17" skinnies. I was fine. I was running out of gearing just past 1/4 mile point though. No way i was gonna slam the trans into OD. Also it will really stress your IAT's.
10-17-2016, 10:23 AM
#6
I was tapping limiter at 165ish. I just coasted the rest of the way. I was gapping 175+ trapping cars then having to let off because I was out of gearing haha.
I have the RS lip kit on my car and didn't have any major issues with body panels. The rear bumper was starting to balloon slightly towards the bottom of the wheel well. I think it's because the pop rivets that hold the bumper to the quarter panel are old and sag slightly.
10-19-2016, 10:38 PM
#7
I was tapping limiter at 165ish. I just coasted the rest of the way. I was gapping 175+ trapping cars then having to let off because I was out of gearing haha.
I have the RS lip kit on my car and didn't have any major issues with body panels. The rear bumper was starting to balloon slightly towards the bottom of the wheel well. I think it's because the pop rivets that hold the bumper to the quarter panel are old and sag slightly.
I have the RS lip kit on my car and didn't have any major issues with body panels. The rear bumper was starting to balloon slightly towards the bottom of the wheel well. I think it's because the pop rivets that hold the bumper to the quarter panel are old and sag slightly.
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10-20-2016, 06:42 AM
#8
9 Second Club
The car is still fairly modern, I cant imagine any speeds troubling it too much, unless you're heading well north of 200mph.
That said....if you start throwing drag specific things in like wobbly tyres, soft suspension etc....then of course those could pose more risks than the actual car design itself.
At some standing 1km events I've done...strangely MT DR's and Hoosier DR's have offered less grip than normal sporty type tyres ( eg 888's and that sort of thing ) which seems kind of bizarre.
The Hoosier DR's were also very unstable at speed. Last time using them a couple of years ago, even at 180+ there was no grip at all from them. If anything they seemed to get worse with speed.
The MT DR's were a lot more stable though, but they have a much much stiffer sidewall than the Hoosier.
10-20-2016, 08:38 AM
#9
You will be 190 bare minimum if you don't burn it down, most cars in that area picking up ~30mph from quarter in a standing half
There shouldn't be traction issues over 100 unless you are racing on sand
There shouldn't be traction issues over 100 unless you are racing on sand
10-20-2016, 11:57 AM
#10
Never partook, but I've been to a few.
Ramp in boost slow, Lower ride height the better, add weight, stiffen up the shocks, add tire pressure. Damming the front and bottom of the car helps a ton. Saw a guy pick up 4 mph speed taping his bumper ducts and wheel wells.
Ramp in boost slow, Lower ride height the better, add weight, stiffen up the shocks, add tire pressure. Damming the front and bottom of the car helps a ton. Saw a guy pick up 4 mph speed taping his bumper ducts and wheel wells.
10-20-2016, 02:15 PM
#11
That is me in a friends Z51 last year (We bought two entries and had a terrific time). I am taking the Formula this year and have some of the same questions. I'm a 6 speed and will have to use 5th no doubt, even with 3.50's. I'm hoping my methanol will help IAT's. Car is getting retuned next week with ID100's and a FMIC because I just don't think the twins can handle the work for the half.
Nothing like changing a bunch of stuff right before you want to use it.
Texas Wannagofast
Will be on 275 Pilots in the front and 335 888's out back btw.
10-20-2016, 02:30 PM
#12
9 Second Club
I use 5th for 1km, it will take me to over 200mph anyway, so it works out ideal. 6th is just a nice cruising gear for me although at the half I'm only around 182-183mph so far.
If I can get to 200mph in 1km that should see me at 190+ for the 1/2 which is doable.
If I can get to 200mph in 1km that should see me at 190+ for the 1/2 which is doable.
10-22-2016, 11:16 AM
#13
10-22-2016, 11:21 AM
#14
9 Second Club
Gearing aside...which is obviously big thing
A car with enough power to be capable of seeing 168mph in the 1/4 should easily be hitting 190+ in a 1/2 mile
Although on an airfield I doubt the same car would be trapping 168mph as it would on a drag strip.
A car with enough power to be capable of seeing 168mph in the 1/4 should easily be hitting 190+ in a 1/2 mile
Although on an airfield I doubt the same car would be trapping 168mph as it would on a drag strip.
10-22-2016, 01:09 PM
#17
I vbox this stuff and have a thousand logs, even with a soft entry of power down low, distance to speed doesn't really change much at all. As compared to unlimited traction at the track. Yes time to speed does
On plain asphalt soft slow ramp I can be 175mph In just under 1600ft where I gear out, and I trap similar to the OP
On plain asphalt soft slow ramp I can be 175mph In just under 1600ft where I gear out, and I trap similar to the OP
10-22-2016, 01:43 PM
#18
9 Second Club
But when half mile racing is all about the trap speed...and less so the ET....1, 2, 3, 4, 5mph is a big difference.
So yes the end result can be a small difference numerically...but it can be a big difference in terms of the result vs others taking part.
I guess it's a little like saying 0.5-1.0s is no big deal or difference in a 1/4 ET, in reality it is massive.
and you have you're car set up very well to grip on road surfaces, I'm sure many others would not especially if used to racing at the strip.
So yes the end result can be a small difference numerically...but it can be a big difference in terms of the result vs others taking part.
I guess it's a little like saying 0.5-1.0s is no big deal or difference in a 1/4 ET, in reality it is massive.
and you have you're car set up very well to grip on road surfaces, I'm sure many others would not especially if used to racing at the strip.
10-22-2016, 02:59 PM
#20
That's the point though. The further it is the less and less it makes a difference to the terminal velocity.
Just look the track. Take a pass where you spin and pedal a lot. The 1/8th mph will be off substantial, but the 1/4 trap is right there. Even more so in the half, or even mile
I went to a street legal a couple weeks ago where traction was non existent. I was running slower ramps than the street and still pedaling
1/8mpj and etc where fked. 1/4 trap very close
Just look the track. Take a pass where you spin and pedal a lot. The 1/8th mph will be off substantial, but the 1/4 trap is right there. Even more so in the half, or even mile
I went to a street legal a couple weeks ago where traction was non existent. I was running slower ramps than the street and still pedaling
1/8mpj and etc where fked. 1/4 trap very close