good question.....I might get the cart in front of the horse on this one, but maybe my little bit of knowledge can shine some light on the subject....or make it more of a mystery MPH/ET= do not go hand-in-hand. So many things a factored in to a pass down the 1/4. gear ratio, traction, weight, HP, air, altitude etc. etc. 1st, let talk about how ET/MPH is measured at the track. *ET is measured from the time you break the starting beam(clocks starts) until you break the finish line beam(clock stops). Pretty simple. The old saying the quickest path from A to B is a straight line. *MPH is measured in the last 66 feet of the track. No radar gun here folks. 66 feet in front of the finish line is a beam, when you cross that beam another clock starts, when you cross the finish line, BOTH clocks stop. A computer calculates how long it took you to cover that last 66 feet and that is where your MPH comes from. The way MPH is measured is WHY you have such a wide range of MPH verses fairly similar E.T. So if you car is pulling hard at the big end, but is sluggish or traction limited at the start, or quick at the start and runs out of motor/gear on the big end. It will effect your MPH. If you watch alot of bracket racing, you might understand better. During time trials I ran a 6.55@ 105. First round of eliminations I ran a 6.61@92 This because I had the race won and let off the pedal at the big end(to ensure not breaking out) my MPH changed a bunch, but my ET stayed fairly close. So a car could actually be quicker than you, but not faster! Did this help any at all?????
Yeah John, that helped a bunch. J/K.. it made perfect sense. It's definitely not as simple a relationship as you might think. Did it help me figure out what MY problem is? No, I don't seem to be fast or quick!
While I know there are many variables, and I know I definatelly have traction problems, I just think if you graph the 2, it would be alot more lienear than that. I would think it tells you something about whats going on. As an example, and just guessing, i'd say Redmav is running out of motor by the end of the track. But he ran with 3:89 gears so that really shouldnt be a problem. Oh well, I got to stop thinking. My 3 brain cells cant take the overload.
not sure and I am sure he knows(Redmav)...maybe he will give his thoughts on it. But my guess is with the c6 and 3.89's that he is not running out of motor, quite the contrary, I would guess that he is not in his power band in 3rd gear?? Just a guess and I hope no one takes offense......hopefully this is and will remain a friendly "thunking" session. Another example is Lentechs car verses Stephens car. Lentech, runs the 1/4 mile, but his 1/8th mile time is 6.03@115 Stephen, runs 1/8 mile and his time is 6.35@112. Thats .3 difference but only 3 MPH. Tells me, IMO, that Lentech is making HUGE FREAKING power at the big end. Looking at the timeslip database. It appears that most cars the run around or under 7 second 1/8 mile, are picking up around 20-25 MPH in the second 1/8th. Were Len is getting 32 mph.
Block checked out good:bananaman Next up...order stroker kit http://www.fordracingparts.com/parts/part_details.asp?PartKeyField=5399
We should have the car in the shop by Tuesday evening...13" tires will fit under the car the way it sits, after looking at the car a little closer we can remove the leafs, retain the coil overs and ladder bars and install a panhard bar and probably go with 15 or 16 inch tires. I ended up gettin the car for 1100.00 and he threw in a set of centerlines for the front. I'm well satisfied with the deal...I'l get some pics up soon and ya'll can tell me what you think.
Congrats on the purchase and project Riporter!! Looking forward to the finished product because I remember how your current car came together. I'm still amazed by the way you work. Good Luck and keep us posted. On the Mph/ET questions and answers, thanks. I have often wondered about that. The explanation was very good Mr. John. Thanks again. RedMav, GREAT CAR!! Preston
