Fartpipe

Well I took the car down to Cecil county dragway last nite with some slightly better air. I was really hoping to hit a 11.3's or better and 126mph. I came up a bit short, but not a complete loss. Better give a quick story first. I ran 11.43@125mph a month ago in some rather warm air with a 1.73 60ft. So I was VERY pleased with those results thinking, "ok if do a better 60ft, clean up some shifting, and cold air I'm down to 11.1-2's at 126mph". So I take the car down last week and was really shocked at how the car ran. I'm not if the car didnt learn everything it needed or what after a battery replacement a couple days before but the car only ran a best of 11.59@124.36mph and stayed pretty much in the 11.64,11.66,11.69 by the end of the nite at 122.67mph. I could not figure out what was happening. Checking video going was I spinning? was the clutch slipping, driver error etc. Still not sure but I did hit (2) passes with 1.73 60ft in 100DA worse weather then when I ran the 11.43pass. To say i was dissappointed was a understatement and the MPH loss confused me even more.
So i take the car down last nite in slightly better weather then those 2 previous time.

1st pass
60ft 1.787
330ft 5.074
1/8th 7.689
mph 96.53
1000ft 9.911
1/4mi 11.745
MPH 124.24

2nd pass
60ft 1.786
330ft 4.960
1/8th 7.523
mph 97.27
1000ft 9.716
1/4mi 11.531
MPH 125.46

3rd pass
60ft 1.745
330ft 4.921
1/8th 7.486
mph 96.44
1000ft 9.673
1/4mi 11.483
MPH 126.22 <---new best MPH I WANT A COOKIE!

All in all it was a fun nite, I did my Ranger change the clutch fluid before I went to the track as usual. I did my best not to slip the clutch so much as to let out quickly and let the car accelerate out of the hole. Any info,recommendations,advice let me know.
This does have to be the most picky car in the 330ft perfection category ever. As you can see the 60ft barely changed and the shifting honestly didnt change much and the passes changed quite drastically IMO. I know the 60ft and 330ft really tie into the end ET result but never had a car that I had to be basically perfect to get a good result. Just a slight difference makes a huge difference in the car at the end and how the car feels the entire track.

greekc6

congrats. what kind of power did you make to trap 126

Fartpipe

450rwhp/400rwtq on a dynojet

Geneus

Get some ET Street and some skinnies up front and you'll drop that ET fast.

Great mph.

Fartpipe

Way to go GENEUS!!!!!!!!!! Now you hurt my feelings

Geneus

LOL...I thought you were on DR's.

You need to launch a lot harder. What are you coming out at? What tire pressure are you running? The 1.7x-60's are killing you. Even I could frequently get 1.5's, though with my new clutch and tranny I'm looking to do better than that.

If you can get those 60's down in the low 1.5x range, you'll be at or below 11.0...the mph is indicative of that, for sure.

Fartpipe

Geneus, you tell me what YOU"RE DOING!!!!!!!!

I'm launching at 4,000-4,500rpm and letting the clutch out quickly not to ride the clutch and rolling into the gas quickly. As I stated my woes of last week. I honestly thought a better 60ft was going to easy for my car with 4.10s and the ET streets and skinnies. However when I launched at 5,500rpm I resulted with what felt like a clutch slip or something I can't put my finger on and getting 123-124.36mph at best with 11.59s as the result. I launch the car lower and hit it out takes off better

Geneus

I'm no expert...hopefully my mentors, Robz and Dr. Ron will come on and give some of their advice. But here is what I know. I always start out with 12-13 lbs cold in the tires, and measure them after the first run. Typically, they'll be at 15-16, and if I feel like I didn't get a good hook, I'll air them down some more...10-11 lbs warm. I try to get a good 7-9 second burnout to really heat the tires. While many like to do a 2nd gear burnout, I feel more comfortable in 1st...that's just my preference. I start out launching at around 5000 rpm, and again, depending on the track conditions will adjust up or down on the launch...typically, going up to 5500-6000. I really am not to good at "slipping" the clutch (more of a quick release and into the gas), and so it is likely that I'm going to never see those low 1.4x-60's like Robz, Dr. Ron and Alex (Alex has a Cartek H/C Firebird, but he can drive a stick ), but I'm thinking that 1.45-1.48 is very doable.

sixspdvet

How was the air at Cecil??? with 126 you should of been in the 10's I agree that if you can get the 60's down you'll be there...

Good luck,

Ernie

Fartpipe

The air at Cecil was nice low 70's, low humidity I didnt calculate the DA.... I actually dont even remember how LOL!

robz

FP, good progress in average air.
That Aussie clutch should not slip at all. I doubt it's the clutch.
Your nex goal should be low 1.6x's for a 60'.
Don B. gave you some great advice.
I think what your doing wrong is not getting on the gas quick enough and not slipping the clutch slightly.

Check list: (keeping it simple)

Get your tires to 12psi(starting psi)
Do a full burnout
Hold launch rpm's at 5000(starting rpm)
STOMP THE FRICKIN GAS TO THE FLOOR (no WUSSY feather throttle) as you come up on the clutch with a slight slip-at the same time.
Adjust your launch rpm/psi according to track conditions and previous pass.

If you spin a bit, so be it, try and ride it out if you can but this will prevent BOG. NO BOG will almost guarantee you at least a low 1.6 and better.
It will take a few passes to get the hang of it and always be prepared if you break something.

Thanks for supporting the potential 11.0 Index I'm hoping to create.

Fartpipe

Thanks RobZ I just look forward to be a LITTLE Lower in the 11sec range NA if ya dont mind Then once I feel pretty confident in the shifting of the car cant get much better and the times wont get much better then the little baby bottle of joy comes thanks to Harris Speed works most likely for a 100-150shot of kick in the pants to hopefuly be in the 10.6 range at 132-134mph with the 28in tall ET streets i have in the basement

robz

I expected a more animated response from you.
Try the launch technique and focus on the bold part. OR
Come down to etown on the 28th(4pm) and we can chat and run the 11.0 index. There will be a bunch of vettes having fun with it and my plan is to get some video to help out a few guys on the launch.
We can swap cars if you want,too.

Fartpipe

That may sound like a possible plan. It may sound like a better plan if you can coerce that Rebel Alex to bring out his big bad black bird Alex and I were talking about swapping cars for a pass or two. I miss rowing gears in my 98 Z28. Much simpler to run a time then the vette and he wants a vette sometime.

Worst case when Alex/WS6transam01 has his party on a saturday we'll all meet up and practice in his driveway LMAO!!

robz

Alex is a stubborn little bugger.
I don't think we can convince him to come this Saturday and run but it would be fun to have him there.

Robert56@RNS

Man that's a beautifull car, but back to that in a minute. Sound advice has been given, and I agree. I have a best of 1.51 with some mondo torque. A little slipping of the tires is good, imo, then you won't break anything. The Aussie clutch should be holding fine, I have hit mine more that 550rwhp and 665rwtq and no slip. I also do the 5500rpm or better clutch dump, with ever so slightly slipping of the clutch, and spin to low 1.5x's all the time, 1.4x's are there for sure if i ride the clutch out a tad more; but with the spray and mondo torque, slipping the cluctch, well it won't last long. Keep it up, you have a 10.xx car for sure, n/a.
Now back to your car. I have read a lot of your posts, but can't remember if ya posted what tires/wheels/sizes and how ya got them to fit? Any info would be great.

Fartpipe

Thats funny/ironic you have read a lot of my posts. Shortly after I started on this forum and LS1tech I've been keeping an eye on your nitrous kit and progress with the 2stage kit. I did the 100shot wet TNT kit on my 98 Z28 M6 and it was a blast. That was 4yrs ago i was using that and I honestly thought that dry kits couldnt have the torque of the wet and the usual myths. Your car showed me otherwise and has had me thinking hard of wet vs. dry for my car to be a mid 10second car at some point in time.

As for my car with the draglites.... check out my photobucket link i'll post. Try to search my threads started by me. You will find me brief write up of what was required to fit those rim/tires to the car. I tried almost everything I and friends could think of to make them work. I'm VERY happy with the final result and the smaller brakes give me no problem braking from almost 130mph in the quarter (keeping in mind your trap is a average speed and by the time you let off you're close to 130mph) with no warping issues as of yet on CHEAP napa rotors. The rims/tires are 15x3.5 front w/1.75back spacing. This is the only back spacing and size rim that will clear the caliper. I tried a 15x4 w/2.25back spacing and would not work. The tires that will soon be changed are 165r15 radial tires. I'm getting A LOT!! of swaying down the track and its a large effort to keep it straight while yanking gears. Going to change to a BIAS PLY up front to hopefully rid myself of that. The rear is 16x9 w/5.5BS WELD "XP" this is the only 16in rear rim that works from weld. It must be the XP or the inner rim area will be curved and not pass the knuckle/balljoint. You can find them if you look hard Weld draglite XP and weld prostar XP in the following sizes 16x8/16x8.5,16x9,16x9.5 I believe were the sizes sold and havent been offered for a long time. I picked up the rear brake calipers with used pads for the front and bought the rear rotors for the front at NAPA with lifetime warranty on warping/flaws. They warp I'm getting new ones

PHOTOBUCKET
http://s170.photobucket.com/albums/u275/FartpipeZ06/

Robert56@RNS

Not to get off topic to far, but here's a tidbit on what the dry hits can do (wet hits are real close also) compared to other power adders, it absolutely kills the competition. And this over lay was not my biggest hit(s) as i went to 250rwhp and 285rwhp with a high of 665rwtq.

These all are BoneStock LongBlock LS6 motors, for power adder comparison, more later.

Robert

Fartpipe

Man I could really use your advice on the nitrous install.