1/4 Mile Results are in(no traction :-/ )**(redemption run June 21st)**

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Originally Posted by mechguy

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I think what you may be trying to say is that a lower ET could have a lower trap speed than a higher ET. Which is obvious. But according to your other post, "getting off the line faster could result in trap speed going down" isn't valid. That's incorrect because all things being equal, a better launch would have to equate to a faster trap speed, otherwise the car would have started slowing down. LOL.

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Wrong.

Getting off the line with less wheel spin will bring trap speeds DOWN, but also equate into lower ET's. With wheel spin you're going to have a higher trap but not go as far as quick.

Pass A: Spins its tires excessively. Using arbitrary numbers, the car passes 500 feet at 60 MPH and no longer has enough power to spin its tires.

Pass B: Less wheelspin results in a better launch. The car passes the 500 foot mark at 70MPH. Clearly this pass will result in a faster trap speed because the car is moving faster at the same distance.

Your logic is the opposite. Please explain where I am wrong.

spinnin aint winnin.
that simple

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Originally Posted by mechguy

Pass A: Spins its tires excessively. Using arbitrary numbers, the car passes 500 feet at 60 MPH and no longer has enough power to spin its tires.

Pass B: Less wheelspin results in a better launch. The car passes the 500 foot mark at 70MPH. Clearly this pass will result in a faster trap speed because the car is moving faster at the same distance.

Your logic is the opposite. Please explain where I am wrong.

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Your scenario doesn't work. When spinning your RPMs are up. Higher RPMs equals more MPH. If I had more time I could try to explain it yet again.

Just quickly, higher rpms equals higher in power band at a shorter point on the track equals more mph at end of track. SIMPLE

You're saying that the most spinning is the fastest trap speed. Spinning isn't putting power to the ground.

One possible reason you can't understand is that different cars have different power & torque curves and different traction characteristics.

Edit: Forgot to mention that ultimately, trap speed is inversely proportional with ET.

Relation between ET and trap speed in drag racing

Most of the time if you 60ft better you will trap lower... the exact reasoning behind this I don't think anyone truly knows... its just how it is. Fwd cars tend to have high traps cuz they can't hook, awd cars have low trap speeds cuz they hook but lower et's... rwd it all depends on set up. Its just how it is. Think of it as if you cross the line sooner you have less chance to build up speed.

If you go to the track often and watch other cars you can plainly see it happen all the time. On street tires I will trap 109-111 but on drag radials trap 107-109. I would say this mostly applies to the average street car at the track. The full drag cars with countless hours in suspension and power to run single digits is a whole new ball game and shouldn't be compared to your 11 an under cars.

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Originally Posted by stealthee

Your scenario doesn't work. When spinning your RPMs are up. Higher RPMs equals more MPH. If I had more time I could try to explain it yet again.

Just quickly, higher rpms equals higher in power band at a shorter point on the track equals more mph at end of track. SIMPLE

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GTP's don't make much high end RPM HP - higher RPM only equals higher MPH with traction but I think you are kinda on the right track imo anyway...

My take is that when spinning or losing traction, which sometimes results in higher trap speeds, is due to of all the energy in a spinning tire that eventually hooks & allows a car to avoid a portion of slower acceleration with perfect grip. Your ET goes to poop but you ended up hooking at a slightly higher speed which is turns allows you to hit a higher speed by the time you get to the last 60 feet of the track (where many 1/4 miles measure trap speed - avg over last 60 ft). There are also a million other factors that come into play as no run is exactly the same as another. I have actually had runs where ET & MPH were the best of the night in a single drag, even over 15 passes in a night.

Is this really a debate?

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Originally Posted by blueguy

Is this really a debate?

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Apparently, yes.

A debate against people who go to the track n race and those who don't apparently.

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Originally Posted by Reverant GTP

A debate against people who go to the track n race and those who don't apparently.

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Pretty much what I thought too.

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Originally Posted by mechguy

You're saying that the most spinning is the fastest trap speed. Spinning isn't putting power to the ground.

One possible reason you can't understand is that different cars have different power & torque curves and different traction characteristics.

Edit: Forgot to mention that ultimately, trap speed is inversely proportional with ET.

Relation between ET and trap speed in drag racing

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You're still not getting it.

I know from experiece and pure physics explains why I am correct. You are correct in saying that spinning isn't putting the power to the ground, but spinning is getting RPMs up faster. Higher RPM's equals higher MPH.

Why is it difficult to understand that when you spin the wheels its like you are starting at a X mph at the beginning of the dragstrip?

I only practice physics, not taboo theories, so it seems we will not be in agreement.

Its not a theory. Physics proves my point to be correct.

higher elapsed time gives you more time to accelerate so your mph will be higher

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Originally Posted by stealthee

Its not a theory. Physics proves my point to be correct.

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"Higher RPM = higher MPH" isn't even close to a physical concept, its a trollilololololipop. Why don't you have scientific proof of your theories? Maybe you meant higher HP = higher MPH?

True or false 5000 rpm in 3rd gear is a faster mph than 4500 rpm in 3rd gear?

There is no theory there. There is fact.

True or false:

4 doors are 2 more doors than 2 doors.