Im there on that one. If my car would have freakishly gone .2 faster in the 60' and 1/4 and NEVER come close again, i would suspect something was up. But I did make a few hundred passes in my vert and they were all consistent with no real surprises. I just know what it takes to pull 1.5s and power/weight/gearing have to be there and they arent in this case. .

 

well i see now why that launch was capable. The slicks i was using were 11.5 wide and they were previously used and they were slighty harder than new slicks so when i launched on them, they spun a lil more than what a new slick would. So the very first run it was a beautiful launch without any bogging whatsoever, the next two launches it bogged towards the end of 1st gear once it caught traction. Now that i have my new slicks the best 60ft i was able to get was 1.8 because they are just so damn sticky. I gaurantee if i had my old slicks i could duplicate that run, but why even say that because i dont have them anymore so i wouldnt be able to. Ill run it tommorow night and see what i get.

 

If you spun, it's even less believeable...my point is...there is more to your 60ft than simply you launch...after you clutch fully engages...you still have to run out the rest of first gear...and unless you are burning the hell out of your clutch your clutch will be fully engaged at about 30ft. So you still have 30ft to accelerate in first gear and your POWER determines how quickly you cover that 30ft...

 

hence the reason you see tons of street tired guys spraying, launching and then going wide open throttle halfway through the 60' and pulling good street tire 60's. then they try to run NA and they cant get within .1 of that 60'. I've seen cars dead hooking carrying the tire at the same weight with better gearing pulling a 1.57s. But that was on a 75 kit putting down 100ft lbs more down than on motor

 

30 ft. to engage a clutch when you completely drop it?

 

THATS THE Z I WAS TALKING ABOUT! thanks alberto! once again, alberto to the rescue!

 

No problem, he was on Mickey Thompson E.T. street though, not really "street" tires although DOT legal to drive on.

Bobby, you really cannot believe you pulled a 60ft like that. Even before you sold those slicks you ran a few times with them and never duplicated it. Nobody is trying to take away the fact that you have run 12.9's, but 12.7 with a 1.5 60ft? If you truthfully believe it you have a lot to learn. My buddy years ago had a slow as fawk Daewoo he raced for fun He would run 16.6 @ 82, one pass his slip read 13.9 @ 81 or something like that, clocks *** up especially at Crapitol.

And JRaptor2000-dont get into it with Brian, he has way more track and Im sure driving experience than you and with a much faster car-not to mention a Z. He has launched on DR's and slicks NA and FI. He knows what he is talking about, as so do I, as I know how hard it is to nail a great launch and I know the feeling of a Z launching on slicks and the huge difference it takes to drop .2 in the 60ft. You on the other hand dont, so although I think its cute you defend your friend, you really should stay out of it. Again Bobby not trying to diss you but you need to be realistic, or just nail another 1.5 60ft NA and shut us all up

 

Yes...from the time you dump the clutch..until the time it stops slipping down to the speed that the wheels match the motor takes about 30ft. Care to laugh again?

 

there's twice for ya.

your clutch would have to suck COMPLETE *** to take 30 ft. to grip when you drop it. it engages instantly off the line, no way 30 ft. to engage. why would it bog instantly if it slipped for 30 ft?

the reason i don't say bull**** on his time, is because it's so close to the others. it'd not some extremely crazy thing like a 12.5 @ 115 w/ 1.0 60 ft. plus, the messed up time slips i've seen have been normal 60 ft. times with 1/4 mile and trap speeds off, never a 60 ft.

btw Bert, i've been at the track and around cars since I was born, literally. Both my parents had racecars and raced them regularly in point series. i've been learning about cars since i was about 8 or 9 and been working on them since i was 15.

 

You obviously haven't learned very much.

If your clutch fully engaged "instantly" off the line with slicks your car would STALL.

Think about it...when you are moving zero MPH and your clutch is fully engaged...is your motor turning??? I'll give you a hint...no it's not. Even if it took a tenth of a second longer than your "instant" you would still bog the hell out of the car or stall because you'd only be going a couple of MPH.

I really don't think you understand how a clutch works if you think it INSTANTLY fully engages off the line when you're on drag slicks.

And who the hell is "bogging" on a 5K RPM clutch dump launch on slicks in a 350Z????

 

i am. i can drop the clutch at 6-7k and when my clutch "instantly" engages i will start spinning the slicks and then as the slicks slow down spinning, my car starts moving faster and faster to the point where the cars speed matches speed of tires spinning which all happens in about 2 seconds and if pulled off correctly you dont bog when the cars speed matches the tires but recently i have been bogging at that point and i just gotta find a way to launch it on these new slicks so it wont do that. I believe its the simple fact i need more air in the tires but i prob wont find out this year because my cars very messed up from Altered atmosphere f-ing up my electrical system.

 

you just obviously don't know what the hell you're talking about.

no **** if you are in gear, not moving and at idle and let the clutch out fast the car will stall. that's common sense. but why do you think you stall? BECAUSE the clutch is fully engaging. if it took 30 ft. for the clutch to fully engage (which you claim it does) wouldn't you move 30 ft. forward at least before your car stalled when you drop the clutch since the clutch is slipping the entire time? and what'd'ya know, you don't. you barely make it 2 feet.

if you're revving the car up to 5k rpms and drop the clutch, it instantly engages, and depending on traction, you either bog and possibly stall, spin, or you've dropped it at the sweet spot where power and traction equalized and you take off like a bat out of hell. simple as that.

it takes less than a foot for the clutch to be fully engaged. unless of course your clutch sucks.

 

You don't get it...I'm not going to sit here and spoon feed it to you. Waste of my time.

Go drive your 14 second old school VeeDUB

 

dont put down a guy with a family drag racing heritage....

 

yes there is a big difference between one cars 1.7 and another cars 1.7 on different tires.

My car on DRs would cut 1.80s on stock heads and run 13.1s 13.2s

on slicks i would spin them and cut 1.80s and run 12.8s

the 60 foot timing was the same, but the launch was way different. one was pop the clutch and give it gas form 4500. the other was a 6k WOT launch from the line, that hit the tires violently.

these too were 11.9 slicks

the size of the slicks with a bolton NA z isnt going to do a legitimate 1.5 60 without gear and a drag oriented suspension and wheel setup. with bigg slicks, all you are gonna do is increase your liklihood of bogging.

some of the modular guys are in the 1.5s on BFG DRs but they run 4.56-4.88 rear gears with a stout geometricaly correct suspension. and have 320+ hp and torque in cars lighter than your his Z

for a time to be legit it needs to be backed up with 2 more passes

 

if you do not apply any throttle or not enough it will.


people complan about their launch and say they leftat XXXX rpm, but once they drop the clutch, did they give enough throttle percentage to maintain close to that rpm?
no

 

I guess I didn't take into account incompentence.

My point was...on a good clutch dump launch on slicks, the clutch doesn't "instantly" fully engage. If it did...the car would bog..or stall.

 

Yea...I probably shouldn't do that..he's probably the "John Force" of 14 second VWs....

 

or spin, which is the case of mine on slicks, almost instant enguagement, car spins at 6k until the car speed catches up with the tire speed.

 

also, a true 1.5 short time in this case sounds like somebody hit the hose in 1st and ran N/A the rest of the run