flame

iTrader: (13)

Here are the details

Street car full weight 3800lbs

Mods:

PS LT's with cats
TR224
Yank SS3600
3.42 gear
26" MT ET street radials
P1SC-1 @8lbs

Best pass

1.63 60'
7.14 @ 98mph 1/8th
11.14 @ 121mph 1/4

I have been fighting a timing pull on the launch but I beleive I have found that now. The 1.63 was with 15 deg timing. My technique so far has been to load the drivetrain to around 1500rpm. Is it best to load it higher if the brakes hold? How much timing on the launch?

Ballzee

iTrader: (5)

shed some LBS... its hard to get a 3800 pound car moving.. i would know..

flame

iTrader: (13)

Weight loss is not gonna happen. I have the same 60' now as I did before the blower. There has to be a better method to launch with it.

pwrtrip75

iTrader: (8)

My guess is that is your problem. You are not going to get much coming off the line at 1500. What is the highest RPM your brakes will hold?
Coming off the line at such a low RPM you are below your power band. And a heavy car will only add to matters. Get it to launch at about 3000... that will help your 60ft.

flame

iTrader: (13)

I have a 3600 stall and it worked best on motor flashing off idle. Now with the blower maybe higher is better. I'm trying to find out what people with similar setups are doing.

pwrtrip75

iTrader: (8)

Doesnt sound like it has anything to do with your blower.... its how the rest of your car is set up.

flame

iTrader: (13)

It is what it is and the question is simple. How do you make a full weight street car 60' with a P1SC-1. If you don't have any usefull info then I'll figure it out on my own.

senicalj4579

iTrader: (41)

3800lbs? Man, lose some blubber off that whale lol

81cuttysupreme

Trans brake? Higher gear?

kvelasco1

iTrader: (1)

Wonder if u could use a 2 step to leave the line in boost.


Posted from LS1Tech.com App for Android

pwrtrip75

iTrader: (8)

I thought my answer was simple. I'll spell it out. If you can only come off the line at 1500 your converter is a POS. Get a decent one and a better rear gear.

flame

iTrader: (13)

I have not tried loading it any higher. The converter flashes close to 3800 the way I have been doing it. I had 4.10's before the blower and the 60' never changed when I went to 3.42's. I'm not changing any parts to try and make it better. All I want to do is find out what works best for others so that I know what to try next time I make it out.

ddnspider

iTrader: (26)

Holy crap dude stop making excuses and just listen. I'm a 3800lb turbo street car that is a 6 speed, aka harder to launch, and will cut 1.5X 60 ft's. You know how its done? Suspension, a good tire, and I launch higher than 1500 rpms You have a stalled auto blown setup with a built rearend. Stall it higher and higher until you lose traction.

Packy

iTrader: (11)

Using a trans brake and two step will help you some. Also maybe switching over to a bias ply tire may help.

ajrothm

Maybe yes, maybe no...

Some converters, especially those on the tight side will flash higher with a lower rpm launch.. Now turbo cars usually leave better foot braking or trans braking the converter as high as it will go to build boost on the line...

NA and blower cars need rpms and get there quickly. Most of the time flashing the converter gets you to rpms quicker and hits the tires harder then foot braking it hard.

My 3700lb car always 60's the best with a low rpm launch. I launch at 1050 rpms (yes 1050), foot to the floor on the last amber and the converter flashes to 3500-3600 instantly. That's usually 1.51-1.54 60's for me. This is with 3.36 gears and a 27" tire. Every time I have foot braked it to 1500 or more at the launch, it will lose 1-1.5 tenths in 60' alone.


To the OP, have you tried leaving off of a dead idle? It may help it flash more. You really need more converter, something to flash around 4500, that's right when your P1sc will start making decent boost...

Get your timing/tuning thing worked out, then try different rpm (lower) launches and see what it does. Also try launching it at full stall on the foot brake just to try it and see what it does... Maybe 2500-2800 on the line.... You just have to try different ways from one extreme to the other. I doubt it's gonna make a big difference though...

Remember that blower isn't doing **** till 4500 rpms so....it's not helping you at all for the first 30'.. That comes from converter/gear/low end torque.

JRENIGAR

iTrader: (37)

couldnt have said it better myself. My lil vortec starts making a descent amount of boost around 4000-4500 and thats where it would launch the best, I would think...

ddnspider

iTrader: (26)

Are you seriously trying to say that a manual turbo car is easier to 60 ft better than a blown auto car? Its a centrifugal blower, its based on RPM, rev higher= leave on more power. The OP said he refused to change anything, and is launching at 1500.....so there's not a hell of a lot he can do otherwise if he wont change anything.

flame

iTrader: (13)

I've only made 10 passes since installing the blower. I'm not about to throw parts at until I maximize what I have. I know there is more in it and the 60' is the place to start. I am asking what people with similar setups found to work best so that I can try that next time out. Turbo car with a stick is pretty much the opposite of what I have............

ddnspider

iTrader: (26)

Reading comprehension must be difficult. I posted that because you're using it as a crutch. There are other full weight street cars that can launch. A turbo M6 is HARDER to get out of the hole than an auto setup. You have a stall and ET Street Radial but say nothing of your suspension. You're not willing to make any changes, but if you dont want to launch higher, what exactly are you planning on changing to make it work better?

flame

iTrader: (13)

I think you are the one with the reading comprehension problem. I don't give crap how your car launches because it has nothing in common with mine. Go back and read my original question.