Kaz

I discussed the times with some of my drag racing friends. Consensus based on the info I gave them was to drop drag slicks pressure to anywhere between 22-25lbs which has already been suggested to you. Pump the fronts up to reduce roll resistance and generally anything you can do to get the car to transistion it's weight rearward on launch would be a great help. With all this they thought it possible you could crack into the high 10's on a good run. Be prepared to be kicked out without a rollcage however. Track operators get excited (in a bad way) about 10 second cars with no rollcage. Not sure if just a roll bar will suffice.

Also, that 0-100-0 run is not something I'd attempt on drag slicks as the car will be even more squirrelly with less pressure in the tires. Though it is rare cars do spin at the drag strip and unlike a road course there is only run off in one direction. Straight.

Imo000

Excellent suggestion!
I’ve seen quiet a few drag radials with low pressure, and about half way down the track the car will start to feel and look loose. This is normal but it sure makes for an interesting ride. By the time you reach the finish you’ll need a lot of attention to keep the car going in a straight line. To keep as much weight to the rear tires, start with a full tank of gas. If that’s too much go down to 2/3 then ½, etc. Eventually you’ll find the right combination.

nc_growler

That 50-70 snap in the original post is just amazing.

Imo000

What snap?

Jon B.

I don't see any reason why Tim's car can't run in the 10s. That trap speed has 10s all over it.

Brett928S2

Hi

No it doesn't ...a half second difference in drag racing is HUGE...

To run a 10 he would need to be close to 150 ish...

All the best Brett

hacker-pschorr

It's amazing that for how much you claim to know about drag racing how constantly wrong you are.

http://www.autoblog.com/2007/12/05/1...-on-run-flats/

Just in case you think that's BS, 10.9 @ 132 for a Hennessey ZO6:
http://blogs.insideline.com/straight...rter-mile.html

How about a 9.94 quarter?? What speed would that be? How about 139:
http://www.pakistan.tv/videos-zx-twi...hvF8Hdo%5D.cfm

All the best!!!!!

soupcan

Ran 10.9's @ 120 with a 60ft in the mid 1.4's with my old Plymouth.
I would bet my murf mobile would run more MPH but would be lucky to 60' under 2.0, so I would guess 11.8/123. Might find out before the end of the year.

Kilbort alert....4:56 gear vs 2:20 gear

danglerb

ET = Extreme Traction, that thing we don't have.

With traction we would start breaking some serious driveline parts.

nc_growler

Sorry... Just noticing the very quick 50-70 times...

blown 87

I was amazed at first, not so much any more.

Z

His car being a 5-speed is going to make it more difficult. The shifts are pretty obvious when you look at the chart. Those horizontal parts of the speed vs time line on the chart are where the car's not accelerating while the shifts occur. Look at the length of time that those horizontal lines occur for, and you can see how long during the 1/4 mile run the car's actually just coasting.

Drag racing, and physics, must be very different where you live. Just a few of very many:
http://www.youtube.com/watch?v=WaG311e1gXI
http://www.youtube.com/watch?v=X71rKQNkB5c
http://www.youtube.com/watch?v=QYwq514l0n0
http://www.youtube.com/watch?v=1xQRq-6QgJ0

You're probably right to not expect your S4 to get a 60' time below 2.0 seconds, unless you had something better than street tires for traction. Your 1/4 mile guess for it should be pretty close. Here's a chart of Tim's wife's '87 S4 A/T with a Murf stage-3 kit and regular street tires on it.

Jon B.

I suppose asking Tim to powershift is out of the question.

Z

It might be even more out of the question asking the transmission to do it.

Jon B.

Touche...