35th LE SS

iTrader: (1)

I posted a few weeks ago and was having some trouble with my 60' times. I ran my best times and 60's today, but still not cutting the 60's I think I should. My mph is pretty high for an A4. But the slow 60' is killing my ET. Here are the runs:

Car has ET Streets, Yank SS3800, headers.

60' 1/8mile mph
1.8115 8.1358 88.166 (18psi ET Streets, cutout closed)

1.8585 8.227 87.892 (16psi, cutout open)

1.7740 8.1454 77.570 (20psi, cutout open, let off early, best 60')

1.7820 8.0837 84.183 (20psi, cutout open, let off early)

1.789 8.1001 87.954 (20psi, cutout open, full run)

1.7943 8.0429 88.737 (20psi, cutout open, best et/mph)

On some of the burnouts, only 1 tire would spin. If I hit it really hard in 1st gear, they would both go. The best 60' was with good burnout. Thanks for the help/suggestions.

35th LE SS

iTrader: (1)

Forgot to mention that I stall it up to about 2500rpm. Any more and the back tires start to slip.

Lane2

If you're doing peg-legged burnouts, then your Torsen has had it... Mine did the same thing. Worked fine on the street and maybe even the first 1 or 2 passes at the strip, then it went away.

Replaced it with an Auburn Pro and have never looked back.

Otherwise, you seem to be doing everything right. LS1edit tuning helped my car quite a bit in the 60' area. We threw more timing at it in the lower rpms and it dropped nearly a tenth off of my 60's. That and learning how to do a proper burnout - Shifting from 1st to 2nd during the burnout and rolling out some. Haven't had a bad launch since. Probably about 25 in a row on 4 different tracks. Before, I was just doing 1st gear burnouts and it was VERY hit and miss on launches - and VERY frustrating.

You've got a great TC though - we installed one on a customers car and they got some low 1.7's first time out at full weight(3600 lbs or so), with some tuning.

Good luck.

CamaroCain

iTrader: (1)

get some skinnys up front and HALs

GrannySShifting

iTrader: (10)

Instead of bake torqueing it try flashing the converter and let it do the work. start at 900 rpm or so, and roll into the throttle as hard as it will let you before spinning try a pass or tow, then move up 200 rpm nd repeat. Ive never seen anyone with a stock style drivetrain/tranny that gets their best 60 fts braking the car.

98TAauto

iTrader: (2)

whats the STR on that converter anyway? I thought the SS was made for juice or top end efficiency? Meaning it wont hit hard off the line. What gears did you have again?

your 60's have gotten better, but i would think with any 3500 stall you should be in the upper 1.6's atleast. It takes time I guess

35th LE SS

iTrader: (1)

The STR is 2.55, so it should hit pretty hard. I have the stock 3.23 gears, with no suspension mods.

Low 1.7's would make me happy. Then with some suspensions mods, I would expect some low 1.6's. Again, thanks for the help/

NHRATransAm

iTrader: (4)

I think with a few more suspension mods and keep working on those burn outs the 60's will drop. I don't stall my SS3800 up at all really just flash it. Car is about 3700lbs, and I pull low 1.6s all the time. On the spray pulled a 1.49 and 1.50 a few weeks ago. It did help going from the ET streets to the ET drags. NA mid 1.6s was the BEST I could do on the ET streets now on the drags it is alway atleast that and better.
Later,
Bryce

AL SS590 M6

iTrader: (1)

Come watch me in MI then.
Called Yank bitching about the 60' and they asked if I was stalling it up. Quote:" our converters will 60 the best by stalling them up as high as you can" end quote.

AL SS590 M6

iTrader: (1)

60' is going to depend upon the weight of the car, gearing, and available power.
I have a simular combo and I 60' in the middle 1.6s in good weather. Last week at the N vs S it was 72 deg. 75% hum. and I 60'ed 1.71s. I imagine that when it's 90 deg. I'll 60' in the middle to high 1.7s.

AL SS590 M6

iTrader: (1)

That's not a real good comparison is it? A stocker with headers vs a heads/cam/long tube combo. You'd darn well better 60' better

35th LE SS

iTrader: (1)

The car is 3600lbs with me in it.

The weather was between 75* and 66* as the runs went on. The density altitude was between 650-750.

Lane2

Yes, stall that sucker up to 2500 or so. That seems to be the sweet spot for every Yank I've ever installed or driven at the track. Including my own of course.

GrannySShifting

iTrader: (10)

Shows there is a first for everything thats why i said everyone one Ive seen. Then again I know of at least two cars, just boltons running within 1 mph of your trap that have cut high 1.5 60 fts more than once on nittos.

Whats good for the goose ight not be good for the gander though, so i just recomend flashign it through the rpm range and then try fottbrakin it through the range, and find what works best.

AL SS590 M6

iTrader: (1)

1.64 isn't too bad for a bone stock (stock MAF, TB, intake, Cast iron manifolds) motor at 3575 lb race weight.

Yep, track prep and launch pads vary so much from track to track that it makes it very hard to compare to any car that isn't beside you in the other lane

NHRAFORMULA00

iTrader: (2)

my best 60 ft came with 12-13 lbs air pressure in the et streets with a yank 3000TT 2.5 1.65 - 1.70 Your torsen is shot, pull the cover and see if there is metal from the spider gears on the magnet on the back cover. My rear broke about 2 runs after the track starter told me i was one legging it.Broke the rear on the starting line, hit the rev limiter HARD and did some trans damage, think that the sprag is broken i will find out when i get time to pull the trans.You might want to check you rear!!!

35th LE SS

iTrader: (1)

Well, I ordered a set of Hal shocks and springs and some LCA's. Hopefully, next weekend I'll get some test and tune time. I'll post the results.

Inspector12

iTrader: (29)

Just to let you know GM is not putting magnets in there rear end anymore check it out when I put the AAM cover and did the required grinding it came with a magnet so I looked around nothing on the stocker so I asked the dealership about it and the sevice tech noticed that none of them had magnets. Guess they wanted to save more money.Ha Ha.

Ragtop 99

iTrader: (7)

Granny:

All of the YTP series work best stalled up. :p
When I had my ST 3500 I did flash that from 900 rpm for best 60' although that wasn't as consistent for bracket racing as using a 2k rpm launch.

MysticLS1

MY CAR CUT SOME 1.66 60 FOOTS ON STREET TIRES WITH A YANK SS3800.I LOVE IT, NO SUSPENSION MODS AT ALL.(DUNLAP SP 8000) WAS THE TIRE I WAS ON.IT WAS RUNNING ALMOST 89 MPH.