My 9 psi. pulleys came in today!! Going to install them and retune on the 19th at AAM. I'm currently making 355 whp with the 7psi setup. Anyone with an ATI procharger running 9psi and could give me an estimate of what kind of power I can expect?

 

At least 385whp...

 

+1. Don't think you'll hit the 400's, but you'll come close. In any case, it's very respectable.

 

385+ whp sounds cool, too bad superchargers don't have as much power available mid-range like turbos do. Hopefully I'll hit 12.50's or lower at the track next month.

 

With a solid 1.9 60ft, low 12's are attainable with that power...

 

best i had was 1.95 60' times. but trans is kind of difficult to shift fast from 1-2 for some reason. so, shifts are slowing me down, and i don't have the ***** to powershift like you do. haha. you coming to capitol in march? i'd like to see your whole set up and all that. perhaps hear it and get a ride. if not, maybe i'll see everyone at the columbia meets.

 

i had 377 rwhp(6/7psi) and ran 12.3 with a 1.9 60ft ...im running 9-10psi now...my tuner said over 400 no prob so i hope u can get there...my numbers will come in march..good luck!!!!!!!!!

 

as long as no one goes faster than 12's.

...because 12's are the physical speed barrier for supercharger setups no matter how much power they make ...so i've been told

 

What was your trap speed and 1/8 info?

I hope somebody runs 11's with a S/C, only problem is that bench racers like yourself will start with "well my 3.9FD and the extra 10% TQ multiplication could run 12's with a S/C when I get to the track, if I stop talking about it and get my a$$ to a drag strip to backup my claims"

 

I'd rather examine different setups and draw my own conclusions which so far is that SC cars with <400whp have done low 12's, so >450whp might have a chance to hit 11's on drag radials/slicks

I tend to think nitrous is the better power adder than a turbo for the drag strip anyway because of the cooling charge and no extra heat from turbos. I know a turbo setup is nice, but running huge power out on the streets with street tires seems slightly pointless if you're not able to make full use of the lower gears anyway. Using the SC alone for everyday use and roadcourse/drift/autox, and then later with a built engine using nitrous for the 1/4 mile for more power where you'll be more likely to use race tires seems like an ok compromise to me.


my car is having more work done right now, but I will go down the 1/4 mile when it's done, but without drag slicks, I doubt I'll hit 11's

If I had the 3.5 FD, I'm not going to rev to 6800-7000 rpms in 4th gear in the 1/4 mile just for the sake of .1-.2 seconds faster. If I'm going to have to shift into 5th gear, I might as well make the gear multiplication stronger and cross the finish at 6000 rpms @11psi with more gear tq instead of 5400 rpms @10psi with less gear tq

 

Why do you always write 3+ paragraph answers? lol...I hope 07' will bring the Z community a S/C car in the 11's, my guess if it does happen is that it will take 430+whp compared to under 400whp with some other set-ups (turbo or N20)

edit-I dont hate S/C's if you dont already know, my GF is actually considering a Vortech or ATI due to the linear power, for her, it would be perfect....

 

yeah that's true

SC's have to make up with their lack of low rpms torque by having more upper rpm torque with more boost up high

it's just a different setup and obviously has some limitations with the maximum power that can be extracted

 

if a 430whp SC = a 400whp turbo in the 1/4 mile,
then a 400tq turbo = a 350tq SC in the 1/4 mile
either statement by itself is misleading


if a 430+whp SC can theoretically do 11's, that's basically around 350 tq from 4500rpms-redline on a centrifugal SC's dyno curve

yet it takes 400 tq on a turbo car to run 11's (which makes around 300 tq at redline for a 400whp@6100 rpms setup)

It's just a difference in how the tq curve is shaped and is misleading to look at hp or tq by themselves. ST's have tq curves that drop as redline approaches and centrifugal SC's maintain a constant flat torque curve to redline as the expense of less peak mid rpm tq


I don't think you hate SC's Alberto and likewise I don't hate turbos. They're just different setups with different power potentials and powerbands.

 

I'm getting a tune on the 9psi pulley in a couple weeks. Also adding a LSD, and possibly a 50 shot for off the line. Should be pretty quick.

 

all the info alberto ....done of bf drag radials....verified in the 1/4 time thread
r/t .... .181
60' ......1.936
330'.....5.307
1/8......8.043
mph.....90.00
1000....10.391
1/4......12.375
mph.....112.62

i have a vid of it and my burnout was....well kinda weak....with my 10psi and a better burnout i hope....i will be in the 11's ....as long as nothing breaks....u know that road all toooo well alberto....as i when i had a piece of shi* evo 8...

 

cant wait for the numbers 350z lee ...good luck!!!!!

 

Great driving-90mph in the 1/8 mile is exceptional for a S/C and matches my best 1/8 mph with the TN kit (but .3 slower). Im guessing you had to shift into 5th at the end of the 1/4 if you have a 6600rpm reldine-without that shift 11's would be that much closer. Nice run, strongest 1/8 set-up Ive seen from a S/C

 

thanks, you get yours dynod yet on the 10 psi? Keep me posted.

 

no dyno yet....numbers in march ....thanks alberto ...i actually hit the rev limiter right when i crossed the 1/4 mark....yea shiftin at 6600. ...just got the aam ecu flash....they said 6800 no prob...even with the 10psi....u trust that??

 

No, I wouldnt raise my redline with FI on a stock block even 200rpm's. They have done so with some cars (whose owners dont even drag race) but that doesnt mean it isnt trouble prone, also you know you will boost a little more at 6800rpm's....but what do I know?