I agree... that is great air for running down south. I would expect 407rwhp to show up as ~122+mph through the traps, although short-shifting and lifting off the gas can significantly slow trap speeds.
I would just do as the others have said...lots of practice.
I guess my driving just sucks... There was pretty good traction on the track but I didnt want to mess up the tranny power shifting. I guess I should have. There was one time when I launched it pretty hard.....I could here a loud bang and jolt from the rear end.....didnt quite know what hit me but then didnt apply enough power and the car just died and lost momentum.
Basically all I tried doing was popping the clutch at around 2800-3000RPM. I really didnt run enough times to be able to change things around.
__________________
You'll never soar like an eagle, if your surrounded by turkeys.
The DA would have been -200 ft then at that time. Looks like you need a little more seat time. Probably pick up a couple tenths and a couple mpg by powershifting too.
I have a ton of them on different tracks, and I never launch above 2800 RPM's with the F1's, no slipping of the clutch either. It took a lot of practice, but it can be done.
Les
Quote:
Originally Posted by WA 2 FST
I can't imagine sub 2.0x 60's on F1s either. I would guess bringing the revs up pretty high 4000-4500 and slipping the clutch a LOT might do it.
I just don't like replacing clutches that often.
David, I do not think your times are bad. The MPH does seem low, but you're in FL, so the air isn't good there most of the time. When racing, always keep track of the day's weather conditions if possible. Temp, baro. press, humidity. If a racer at the track has a density altitude meter, ask him for the data that day/time. It helps when trying to compare one track day to the next and against some of these guys who run at DA of 500-1000' below sea level.
__________________ [sold] 02 QS Z06 383 c.i.
441 RWHP 445 RWTQ, FLP Long Tubes & GHL Quads, 42# Injectors, LS1 Edit Tuning, Vararam w/T1 C. F. Bridge, Vinci 170 Stat, Ripper Shifter, Lowered and Tinted
Les, I do much better on our nicely paved concrete roads in the N. Dallas suburbs. I know you've discussed this before, but are you saying you just take it up to 2800rpm and dump the clutch? I honestly do not believe that would work at the two tracks I have raced at here in N. Texas.
David... do not beat yourself up! _Anytime_ you bog the car and it loses momentum, you just killed ET and MPH. Think about it... you basically just shortened the track on yourself, giving you less time to accelerate up to a given speed. The engine is now trying to pull back up into the rev-range, althewhile it is under load. It's a lose-lose proposition, but one that happens trying to finesse the car.
I have no doubt that if you bolted on some slicks and did a 4500rpm clutch drop and powershifted that the car wouldn't run low, mid-11s at 121-122mph. But you may decide you don't want to try that. I don't like breaking things, either, and I no longer drag race competitively, so I can live with a slow ET.
But if you can find a threshold where you can walk it out slowly and keep the nose up as you push the accelerator harder, then you will see a vast improvement in your trap speeds. You'll also improve your ET, although it will never be optimum unless you bolt on the slicks.
No clutch dumping on the F1SC's! I take it up to 2800, release the clutch (smoothly but quickly) and as the tires engage "press" (don't stab) the fun pedal - how much and how fast depends on the track conditions. Very little slipping of the clutch, and a happy middle ground between a bog and too much spin. To be fair I practiced the launch prbly 25-30 times before I "got it".
Les
Quote:
Originally Posted by WA 2 FST
Les, I do much better on our nicely paved concrete roads in the N. Dallas suburbs. I know you've discussed this before, but are you saying you just take it up to 2800rpm and dump the clutch? I honestly do not believe that would work at the two tracks I have raced at here in N. Texas.
David... do not beat yourself up! _Anytime_ you bog the car and it loses momentum, you just killed ET and MPH. Think about it... you basically just shortened the track on yourself, giving you less time to accelerate up to a given speed. The engine is now trying to pull back up into the rev-range, althewhile it is under load. It's a lose-lose proposition, but one that happens trying to finesse the car.
I have no doubt that if you bolted on some slicks and did a 4500rpm clutch drop and powershifted that the car wouldn't run low, mid-11s at 121-122mph. But you may decide you don't want to try that. I don't like breaking things, either, and I no longer drag race competitively, so I can live with a slow ET.
But if you can find a threshold where you can walk it out slowly and keep the nose up as you push the accelerator harder, then you will see a vast improvement in your trap speeds. You'll also improve your ET, although it will never be optimum unless you bolt on the slicks.
Ok, well that's the trick and, you're right... it takes a lot of practice and even then you have to be able to alter it slightly depending on track conditions. I realize you're not slipping it like I described in my post way up there ^^^^^, but this is still a bit of clutch modulation with throttle worked in there as well. Definitely takes a deft touch, and getting it right is rewarding. The margin for error is a lot less on any type of radial tire, and the more power you add just makes it even less (as you're well aware ).
If I could get a 1.7 60', and decent air, I'd be in the 10s for sure.
bah.. YOU SUCK... I ran 12.47 in bone stock form .. Of course Im kidding, thats an awesome time.. The first time I hit the track I ran a 14.4.. Yeah, now talk about embarrassed.. It took me about 25passes to finally learn how to drive the car.. Trust me when I say this, as your 60fts drop and as you learn how to drive the car, the times will drop significantly.. This last time at the track I finally started hitting 1.8 60fts, and I still think I have room for improvement (I could feel them spinning in 1st, shift to 2nd, and then during the shift to third).. Throttle control is definitely the key, me.. Im just too impatient and get on it wayyyyy too fasst... Once you learn finesse you'll be turning 11s without a problem..
I'm going to be nice and not bash that reverse split cam.
Being that I ran that cam for alot of passes, I'd say you definitely need to shift further out, maybe 6600. That air quality was actually quite good. You should have been trapping higher, but it's real easy to bench race from a keyboard. Lots of factors involved.
Keep practicing on the shift points. A shiftlight might be a good mod to do next. Keep your eyes on the track and let the light do the work.
And btw, I think those rwhp numbers are excellent for stock cats and that cam. The tq number is what looked low to me. Time for high flow cats.
Good luck.
__________________
'06 MS Z06
11.31 at 123, 1.80 60ft
showroom stock
I guess my driving just sucks... There was pretty good traction on the track but I didnt want to mess up the tranny power shifting. I guess I should have. There was one time when I launched it pretty hard.....I could here a loud bang and jolt from the rear end.....didnt quite know what hit me but then didnt apply enough power and the car just died and lost momentum.
Basically all I tried doing was popping the clutch at around 2800-3000RPM. I really didnt run enough times to be able to change things around.
David... This was your FIRST TIME at the track. I don't care if you're driving a Pinto or a Mercedes with an auto tranny... it's VERY NERVE RACKING! I still get the shakes... as a matter of fact, this last time at the track with my ET Streets, I couldn't get my left foot from shaking long enough to launch the car properly. Don't stress about your driving the 1/4 mile. It's not easy at all. I think everyone will agree, hands down!
Practice the launch, that's where the ET gets hidden and stolen.
There are others running the RPM up to 4K and slipping the hell out of the clutch - personally I don't believe in it. As you say with more power it gets gharder, which is why I went with the drag radials, I get consistent 1.6X 60' times with them Last time out for this year will be Saturday, hope to improve on my 11.3.
Les
Quote:
Originally Posted by WA 2 FST
Ok, well that's the trick and, you're right... it takes a lot of practice and even then you have to be able to alter it slightly depending on track conditions. I realize you're not slipping it like I described in my post way up there ^^^^^, but this is still a bit of clutch modulation with throttle worked in there as well. Definitely takes a deft touch, and getting it right is rewarding. The margin for error is a lot less on any type of radial tire, and the more power you add just makes it even less (as you're well aware ).
If I could get a 1.7 60', and decent air, I'd be in the 10s for sure.
David... This was your FIRST TIME at the track. I don't care if you're driving a Pinto or a Mercedes with an auto tranny... it's VERY NERVE RACKING! I still get the shakes... as a matter of fact, this last time at the track with my ET Streets, I couldn't get my left foot from shaking long enough to launch the car properly. Don't stress about your driving the 1/4 mile. It's not easy at all. I think everyone will agree, hands down!
Practice the launch, that's where the ET gets hidden and stolen.
David
I agree!
And don't powershift those tires bro with that rwhp. Take peoples advice! The best thing about these boards is that you can learn from guys/gals that have tried all of these things hundreds of times.
__________________
03 Z06 H/C
9.985@138.80
Best 60' 1.41
I agree!
And don't powershift those tires bro with that rwhp. Take peoples advice! The best thing about these boards is that you can learn from guys/gals that have tried all of these things hundreds of times.
David,
Listen to these guys!! They know what they are talking about!! You did great times. Keep practicing, like I need to do!!!!
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There was pretty good traction on the track but I didnt want to mess up the tranny power shifting. I guess I should have. There was one time when I launched it pretty hard.....I could here a loud bang and jolt from the rear end.....didnt quite know what hit me but then didnt apply enough power and the car just died and lost momentum.
Of course Im kidding, thats an awesome time.. The first time I hit the track I ran a 14.4.. 
Yeah, now talk about embarrassed.. It took me about 25passes to finally learn how to drive the car.. Trust me when I say this, as your 60fts drop and as you learn how to drive the car, the times will drop significantly.. This last time at the track I finally started hitting 1.8 60fts, and I still think I have room for improvement (I could feel them spinning in 1st, shift to 2nd, and then during the shift to third).. Throttle control is definitely the key, me.. Im just too impatient and get on it wayyyyy too fasst... Once you learn finesse you'll be turning 11s without a problem..
Don't stress about your driving the 1/4 mile. It's not easy at all. I think everyone will agree, hands down!
Last time out for this year will be Saturday, hope to improve on my 11.3.
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