Typerx…are you kidding? Its a frigging semi slick tire. Definitely helps. Its the contact patch that is key in this instance not saying there’s a soft, deforming sidewall of a drag tire like mtetdrag.
I found the directional toyo tires when I went 12.75 on my car helped vs the channeled continental tires that were originally on the car when I went 12.94
Mick as for you bogging…how…launching at 2000 rpm? I struggle to stop the car from spinning at the strip…and according to your dragtimes.com listing you make 40 to 60 whp more than me and weigh 250 lbs less.
It’s kinda odd you keep bringing up 100 octane, but never you extra 150 pounds, or tune , crank pulley, ported intake manifold or light weight wheels. Yes tour tune may be on the weak side but it does remove the tq limiter in 1st and 2nd gear as well alter the timing tables.( which affects this car the a lot). No more talking about what could have been done on the f’ed up pass. We all make mistakes. I know I have in my 300 to 400 passes.
On another note I guarantee the best 60ft time will be done without launch assist. IE: my 60ft
Your car is quick but I feel you leave a lot on the table with the launch. If you are using LA, stop. Bring it to 3800 revs and let the clutch go very aggressively.
Do you have a video of in the car during a pass? How are you shifting? Granny, quick or power shift ? I know most people power shit 3to4 , I’m more concerned with 1/2 and 2/3.
Jnaut do you not struggle to stop the tires from spinning? Not sure how Mick is bogging…even 3000 RPMs my car spins them at the strip and 3500 rpm on rough asphalt does this
To be honest no, but I launch around 3400 to 4100 revs depending on temps and track conditions. I do get a little front wheel spin but I control it all through the clutch. And I usually get a healthy chirp going into 2nd and thats it for tires. the rest is full throttle and and a little bit of shifting.
If he is bogging then 2 ways to fix it increase the revs or increase the slipping of the clutch. On and awd car increasing 4 psi to the tirers will not change your bogging condition. You changed, something is different , possibly track … Hummmm idk.
Yes the exact fuel used was ms109. I am estimating the ratios as my car had 3/8 of a tank then poured in 3 gallons race fuel. It brought it up to about 1/2 tank.
And I do recommend the fuel as its unleaded and oxygenated. Did it help me , yes to what degree I don’t know as ambient temp were high 80’s to low 90’s and we all know that if the IAT’s get a sniff of hot air it chops timing hard.
My honest estimate would say 1.5 mph trap speed was from the fuel. Which still puts my trap around 111.5 with very minimal mods. But this hypothetical. I can tell you my car dynoed 355 on a mustang dyno with zero mods and no carbon cleaning.
haha challenge accepted! But I am afraid I might be out a few weeks on the next runs. And they are closed this coming weekend so I wouldn’t even be able to go out with 98 octane and try my luck until a couple more weeks. Time enough for you to do some more runs before me. Plus are you going to put a cap on fuel octane? Because you could drop 103 in there and get it right now.
My shifts are quick, not power, not granny. All of them from 1st through 4th. I am sure I have a little bit out there, but based on trap speed, not more than 12.3.
Anyways, yeah I know you have 160 or so lbs more than me on your car, and I had what, 50 lbs more fuel than you on my run and how much do you weigh, so in the end there may be what: a 75-100lb difference in our runs? Thats a tenth. But you are running half second faster than a stock RS4, and being only about a tenth faster based on weight compared to stock, you are getting .3 or so from the gas and .1 from ability i would say. So by that estimation, wouldn’t you say I would get .3 from gas as well tacked on mine? Put me around 12.15? and you are getting something on my for the DP’s, i am getting something on you for the tune (not as much as some believe I am getting). in the end it wont matter because someone will just come and run 109 octane and have one milk create for a seat in the car.
This not my first rodeo, you are going up against wall!! Apparently I need to order in some bits tomorrow… And it will be to Jhm, lol. It’s just do damn hot down here until late December .
Out of curiosity what is this " ram air" you have on your car? Home-made or off the shelf. It’s good for higher trap but not so much on et’s.
I have a ram air system, home made. Its essentially a panel i made behind the passenger side fog light, with a port in it 3" in dia, and connected to a hose that runs up to the 3rd air inlet on the front of the airbox. Its a temporary setup, I hope to have a better CF based system soon. It basically drops my IAT several degrees when over 4k rpm, as around there the 3rd air inlet flapper valer in the airbox opens and allows it to suck in engine bay air. Well this has bypassed that and I now get a nice flow all the time of ambient air. It works well, and I tend to get a couple more g/s on the MAF now because of it. instead of 158 or 159, which is what you should see on a cleaned car, I get 161-162. I have logged this as well and it does contribute to torque and to the 3k-8k logs I take quite often, especially after a mod. BTW to install you have to remove the aux radiator there and put in a larger oil cooler to give you margin on cooling capacity.
It is a semi-slick tire, no doubt. But it is common for tires to be designed for DOT legal tires to be designed for either drag racing or road racing. These are designed for road racing. Stiff sidewall makes it harder to launch and sticky compound increases rolling resistance the whole 1320. I am not going to speculate (because that would be continuing the silly bench racing) about how much slower they make you when drag racing, but to call them an advantage vs. street tires is really grasping at straws.
Contact patch changes very minimally based on tire, and really only changes shape, not size. Contact patch is only determined by weight of the car and air pressure in the tires.
On another note, looks like the thread has re-directed to some extent! 8)
Typerx we are all using street tires so arguing that a drag radial is better than these is irrelevant. Also how is this grasping at straws? As we go through the facts more and more advantages to Micks car add up.when a guy us arguing that he could have run xxx etc and keeps begging for praise sooner or later people will tell him the truth whether he likes it or not.
A traditional channeled tire makes far less contact with the road Than a slick or semi slick tire does. When you are launching the car contact is key. Wider is key too…and these are 275. If you think a semi slick, r compound 100 rated tire offers less grip than a street tire when accelerating from a dig, well we will have to agree to disagree. You are also disagreeing with the entire internet because I searched and couldn’t find anyone who thought they wouldn’t help someone vs a street tire. Not as good as say the Niro 5555 but way better than street.
My grasping at straws comment was directed at trying to discredit the time 0.1 by 0.1. What is actually a nice result for the RS4 (now one of the fastest NA 1/4s, right?) seems to have created some unecessary controversy over here.
With tires, you can’t make as solid contact with the pavement if you have a very stiff sidewall tire because of the load of a launch. A general statement.
And for the record, when I made my record 13.4 pass, it was with Mickey Thomsons. Nice try to take a jab at me though!
Bottom line, I am callng it like I see it. I have no vested interest other than excitement to see these cars run well. He ran a 12.4. Nice result. The bench racing (oh, I can gain 2 tenths by…or you are only that fast because of …) appears silly at best and also seems to contradict the mantra here which is prove yourself with real results and no excuses.
I think this is not as much bench racing as much as it is analyzing results. That was no shot at you it was a question
As I said if you think an r compound, semi slick,.100 rated tire offers LESS grip from a digg than a street tire like everyone else runs you are alone on that one.
Let me clarify and then it is time to start working. Those tires are more grippy than most (if not all) street tires, I’m sure. But, I don’t think they will contribute to a better 60 foot. Grip when launching is about maximizing the contact patch at the moment of hookup, right? Well, really stiff sidewall tires won’t work as well in that scenario as softer sidewal ones. I see your point about the fact that there is little tread/channels if the tire is essentially bouncing (as little as it may seem) during the launch because of the extra reinforced sidewalls, you aren’t using that rubber on the ground until things settle down. At that point, you just have more rolling resistance.
Okay, now I have delved way too much into this silly theory. I’ll back off of it now.
And for the record, I have Hankook v12 tires on right now. Not the best tires in the world, but got them for $700 new for the set of 4. So can’t complain as the value quotient is off the chart.
I’ll head back to the track as soon as the weather and my schedule cooperate. Hopefully soon. The thing that sucks is the dragstrip nearest to me is usually only open for test and tune on weeknights and I generally work a ton, not leaving enough time to get up there.
hankook v12 are a great example…lots of channels, not much contact.
I’ll take super soft R compound + 275 + semi-slick pattern vs. a 255 channeled street tire with a slightly less stiff sidewall all day every day. Actually I wouldn’t, because I don’t care what my car can accomplish in a mode that is not reflective of how it rolls on the street. That’s why I don’t go to the strip with my backseats removed either. I’m using the strip for two things
fun
test for the car
If I fuck with the car’s integrity (seats removed, slicks, race gas) I am suddenly unable to compare my time to the world of road tests out there and I’m no longer seeing how fast my RS4 can go…I’m seeing how fast my RS4 can go in a configuration that I will never drive it in anywhere else.
With that said, I will try to run on race gas while stock here at some point, just to see what the octane boost really does since my car was pulling up to 4-5 degrees of timing in ice cold weather and more like 7-8 in the recent warm weather. I promised this to someone on RS246 when we were talking about it, so will do it as an experiment.
