WHPLASH

iTrader: (22)

I'm going to the track in a couple weeks. My best 60' is a 1.80 on M/T drag radials. I've tried different techniques. Hammer it off the line, raise the rpms to 1500. Can't seem to get out of the 1.8's. Also, I've read about people raising their rpms to 2800, how and the hell do you do that??? I can raise the rpm's to about 1800 before it starts moving forward. And thats standing on the brakes.

I'm looking for that 10 second slip. I know every car is different, but I should be cutting better than that.

darrensls1

Generally the bigger the stall the higher you can brake stall. My old TCI 3500 could go to 2400 rpms before it would start braking loose. My current circle-D 4400 stall can go to 3200ish. I know my best results when I had the 3500 stall was 19 psi in the tires, 5 second burnout and 2000 rpm brake stall mashing the gas on green. As long as I wasn't spinning it was good for 1.6x 60's.

I don't know why you can't go beyond 1800. That sounds kind of low to me. Might want to ask Dave @ Yank if that's normal for that particular converter.

I'm assuming you have stock 3.23 gears since your sig shows nothing on gears. The PY3400 is not an extremly hard hitting converter with a 2.3 STR and the 3.23 gears arn't helping much either. Still, I would think you should be able to hit low 1.7's.

I think you need a little more stall and a little more gear. Then the 60's should drop a lot. But I would seriously talk to Yank about your converter. While you got them on the phone you can ask them how much to convert your PY3400 to a SS4000

Good luck.

WHPLASH

iTrader: (22)

Darren, thats for the reply. I just sent Yank a PM regarding this. Yes, I do have a stock 10-bolt with 3.23's.

So, do you suggest raising the rpm's as high as I can to launch? Over just flooring it.

slowmofo

iTrader: (6)

when I was cutting 1.6's with bolt on's and a little 3K TCI I would just pre-load the drive train a tad and hammer it..

I switched to a Yank 3600 and have yet to figure it out, best on motor so far is a 1.70

darrensls1

I suggest a few hundred rpm's less then as high as it can go. For example, my TCI 3500 could go as far as 2500 rpm's before I would break the tires loose. I would launch at 2200 rpm's to get best results. Then as long as I had enough traction I would floor it as soon as the third yellow light went on. If you hook this should give you as good of a 60' as your setup will allow on that day. If you're spinning then try going off idle or giving slightly less gas and feathering into a full throttle.

When I would flash the TCI converter off idle I would get 1.71-1.75 60's. When I stalled it up to 2000-2200 rpm's I would get 1.65-1.71 60's. That's what worked best for me.

Now I stall up to 2500 and go 3/4 throttle feathering into a full throttle. But that's because my stall is too big for 255/50R16 tires. I still get high 1.6x 60's though

WHPLASH

iTrader: (22)

Got ya. My best 60' was when I was at about 1500 rpm, so about 300 less. I'm just disappointed I can't cut a 1.7 with 550+ rwhp. I don't spin off the line either.

Flashing the converter means............flooring it off the line and not raising the rpms??? Sorry, illiterate.

darrensls1

That is correct. Flashing means just flooring the gas off idle. Hopefully Yank can shed some light on this. There is no reason I can see for you to still be in the 1.8 60's if you're not spinning. Sounds to me like something is wrong with your converter.

I got 1.65-1.70 60's with 325 rwhp, 3500 stall and 3.23's. No reason you should not be there with a 3400 stall and 500+ rwhp.

Good luck.

99BlownSS

iTrader: (2)

I would recommend a yank ss4000 thats what i have and do 160 all knight

slowmofo

iTrader: (6)

Im in the same boat as Darren, bolt-ons with 3.42's and im in the 16's low 1.7's

ramairracer

iTrader: (13)

i hit low 1.6x with at yank pt4400 stalling to 3000 at the tree on et slicks

Andrew@MarylandSpeed

Yeah I'd have to say that if you're leaving the line at immediate full throttle with no tires-spin on a 550 rwhp car on a solid axle...... then something isn't performing at it's best if you're not cutting below 1.80 60 foot with an aftermarket converter.

I'm running a Vigilante 3200 stall on my GTO, with factory 3.46 gears (a little higher than yours) but through independant rear suspension. Running on MT drag radials I'll pull low 1.5's all day long if the track is prepped well and I don't spin. I stall up to 1800-1900 RPM usually and nail it all the way down when I leave. Different car, but if I can hit low 1.5's with my setup you should be very well capable of low 1.7's at least with your setup.

Greaseymec

iTrader: (9)

With those power levels in your sig, you should be pulling the wheels off the ground just a bit! What are your times/traps. I,m cutting mid 1.50s all motor on a underpowered LT1 Pulling the front wheels just a bit with a 3600 Fuddle. What kind of suspension work have you done? Details, Details, Details!!

Mec

WHPLASH

iTrader: (22)

http://lsx.streetfire.net/video/a7c7...2000a4809f.htm

Only suspension mods are BMR (subframes, lca's, torque arm). Everything else is stock.

BMR Tech2

iTrader: (5)

Hello, i would try a set of lower control arm relocation brackets. They allow you to change the instant center of the car and will help with your 60' times. Since you have the stock rear in the car you can use our bolt on version. The are made from cold rolled steel and not welded together. If you have any questions please give us a call. Our tech dept is open until 6pm est mon-fri.