12 second quarter mile traction & power to weight ratio

[benca1]

I hate having to come up with subjects. Should it be interesting? Accurate? Decriptive? Should I insert in capitals, "ALL NUDE HERE."?

Thanks for coming in anyway, I have a question(s).

First; I read somewhere that a power to weight ratio of 10 to 1 makes a 12 second car. That's 10 horses for every 1lb of car. Is this a good general rule? I'm assuming that this is to the wheels, al a dynapack.

I've taken great interest in edos quarter mile time, and unlike our hero kindle, edo provides a video! <hint hint kindle >

Now, kindle hasn't complained, as far as I can remember about any severe traction problems, and his car is clearly putting down less power then edo's. In edo's video you can hear the car spinning the wheels throughout all of first gear.

When the RSX starts to put to the ground what edo's car does, how do you control the traction problem? Edo has mount inserts, sticky tires and a LSD. I thought that this alone would eliminate or seriously limit traction related issues. But I'm an idiot.

What do people do to gain traction at this point? Is there anything less dramatic then modifying the suspension? Drag radials or slicks? What else is there besides putting power to both wheels?

Any input, or just a url wouldbe appreciated. Thanks.

[tenth]

Originally posted by benca1
First; I read somewhere that a power to weight ratio of 10 to 1 makes a 12 second car. That's 10 horses for every 1lb of car. Is this a good general rule? I'm assuming that this is to the wheels, al a dynapack.

Other way around. I don't think we'll ever see a 2700whp RSX, 270whp is a little more realistic . Power to weight is generally less than one, but bigger numbers are easier to compare so weight to power is what is generally looked at, but still referred to as power to weight for some reason.

[mastap]

Originally posted by benca1

First; I read somewhere that a power to weight ratio of 10 to 1 makes a 12 second car. That's 10 horses for every 1lb of car. Is this a good general rule? I'm assuming that this is to the wheels, al a dynapack.

.

No its 1hp for every 10lbs of car. So if we took our fat ass cars weight down to 2000lbs we should be close to 12's. Power to Weight is basakwards. It should actually be Weight to Power ratio. By your math we would have to make over 2700hp to hit 12's. See what I mean?

That’s why the Civic hatches that weigh in @ 1800lbs and only have 180hp pull 12's.

[benca1]

Oh, duh. Too lazy to edit my post.

Thanks.

[ChurchAutoTest]

Slicks, slicks, slicks. FWD sucks for drag racing, so when you've got a ton of power, you need really sticky tires. With slicks, Edo would easily (without even working hard at it) knock off over 1/2 second from his ETs, and his trap speed might even go up because he's spinning soooo much right now.

Also, the Azenis aren't exactly sticky tires. jdkindle has done a great job getting good launches with them, but they're just somewhat sticky street tires. Edo also picked an unfortunate weekend to be at the track. They'd just repaved Famoso in Bakersfield and traction was decidely less than it was prior to the repaving. Hopefully a couple weeks of racing will put down some more rubber and make it stickier.

I think that with more practice, there's a 13.4-13.5 in his car on drag radials w/o any weight reduction.

SC

[benca1]

<sigh> So FWD is a serious impediment to controlling power.

Does anyone know what is done to get these 10 second FWD cars to the finish line so fast? What is the practical limit for a street driven FWD car?

[jdkindle]

I will be supplying video from tonights runs.....I finally got a camera that I can easily load them with

but, as mentioned, slicks is the most helpful thing (which edo is getting if you have not read already) after that it is drivetrain, then suspension that gets the power to the ground

I am not putting down near as much power as edo, but the difference is, I am able to apply it all at this point......I have a couple more plans, but I would really like to get my hand on a set of slicks that would fit on the car....maybe edo would let me borrow his

another way (what I have done) to get rid of traction problems is seat time......now this can only go so far, but I am a decent example of what it can do

[jdkindle]

Originally posted by jdkindle
I will be supplying video from tonights runs.....I finally got a camera that I can easily load them with

cancel that

rain

[benca1]

Interesting that you're both so close in times, and how, to a certain degree, edo's power slows him down. I want my car fast without slicks - mid 13s on street tires. Is this possible?

[jdkindle]

absolutely....just focus on suspension and drivetrain

[azrsx02]

man you guys need help with your math....he said 10 hp for every 1 lb of car..... 2700lb * 10hp/lb = 27,000hp. haha.

[rsxlerate]

lance with a black rsx type-s ran 12.9 and .500 reaction time, 80shot nos and uncorrect size slicks