Yes I did a 2nd gear burnout then left the line dumping the clucth a 4500rpm which produced a big bang ( which I was used to in my 05 GT)this car is gonna need some serious trailing arms & a 3rd link.14.5# of air in ET streets.
Last edited:
Formula51 said:Makes perfect sense. Thanks, I have never raced on slicks before.
MD03SVT said:Yes I did a 2nd gear burnout then left the line dumping the clucth a 4500rpm which produced a big bang ( which I was used to in my 05 GT)this car is gonna need some serious trailing arms & a 3rd link.14.5# of air in ET streets.
MD03SVT said:Yes I did a 2nd gear burnout then left the line dumping the clucth a 4500rpm which produced a big bang ( which I was used to in my 05 GT)this car is gonna need some serious trailing arms & a 3rd link.14.5# of air in ET streets.
Please! :rockon: Get it on video too!Fourcam330 said:Any chance you'll leave at redline next time out? ;-)
was that with the stock suspension at 3200#, your first time out to the track with the car? Oh, I didn't think so.XtremeBuford said:I did 12.45 at 110 with under 300hp, 1.78 60. Not impressed to say the least
XtremeBuford said:I did 12.45 at 110 with under 300hp, 1.78 60. Not impressed to say the least
XtremeBuford said:I did 12.45 at 110 with under 300hp, 1.78 60. Not impressed to say the least
MD03SVT said:1st of all the track prep was extremly great Billy Glidden went 7.02 back to back & Chuck Samuels went 6.44 so with a 4300 pound car & 3.31 gears I had absolutly no tires spin at 14.5 pounds so why lower the pressure & if you have ever driven a 4300 pound car with only 9 pounds in your slicks you know that it is a scary feeling at the top end.I only got 2 practice runs & 1 round of elimination.I plan on raising the launch RPM on my next time out this weekend.
My buddy had his 248.8rwhp 02 GT there & ran 12.67 @ 109mph with a 1.66 60 '.
MD03SVT said:I ran 11.23 @ 124mph with a 1.57 60' in my 04 cobra coupe & 11.43 @ 122mph with a 1.65 60' in my cobra vert & 12.48 @ 111mph with a 1.67 60' in my 05 GT so I think I have a pretty good idea of what I am doing.This was my first time out with the shelby & I was feeling things out,the reference to billy & chuck was not to compare me or my car but that the track prep was the best I have ever run on as our track here in montreal is considered an icy track where many times my cobra's have broken loose in 3rd gear.Here anything over a 5000rpm launch will get you nowhere real quick.last weekend onthe ET streets I had no tire spin what so ever but broke loose on every shift on the stock goodyears even with the traction control on.
Black2003Cobra said:As far as the question about the relationship between the 60 foot time and weight, the short time goes as the square root of race weight and is inversely proportional to the square root of rear-wheel torque.
“It can be shown that” a decent estimate of the 60-foot time is given by the expression,
60’ time = 0.397*[(w*Dtire)/(TQ*GR)]^0.5
where w = race weight in pounds, Dtire = tire diameter in inches, TQ = engine torque in lb-ft as meas'd on a chassis dyno (use peak for best-case estimate), and GR = total gear ratio. For the Shelby, GR = 3.31*2.97 = 9.83. In deriving the formula, I assumed a roll out of 12 inches. A little more or less won’t change the answer much. The derivation also assumes PERFECT traction! TQ can be corrected for ambient conditions.
Very good point JT. Yeah, there would be some guess work there for sure! Although I haven't worked through it, I would treat it as an inelastic collision. But yeah...that's exactly why I made the point to mention that the above formula is only an estimate! It does tell one how the numbers would scale with weight, etc.jtfx6552 said:Is there any way to account for the energy stored in the rotating parts on the flywheel side of the drivetrain?
I guess you would need to know the mass moment of inertia of the various parts.
Probably a tough calculation to figure what happens when that energy "hits" the non rotating parts from the imput shaft of the trans back.