I have an 04 350Z and just recently added a procharger in addition to my existing plenum spacer, headers, testpipes, exhaust, and under drive pulley. With the fuel management system that comes with the procharger will everything be set correctly out of the box or will the system have to be tuned using a dyno and wideband O2 sensor? While driving it the last week and a half I notice that the powerband is not as smooth as I had expected, instead, it seems a little jerky while going through the shifts. Could this be because the fuel isn't set right? Although I cant hear any detonation, could this problem come from the fact that it might be running too rich? Someone please help me out on this.

 

A Procharger with an underdrive pulley? Hows that 3lbs of boost feel?

NEVER run the base map on any FI kit especially with a bunch of mods. Seriously though you do realize an underdrive pulley + S/C = less than desired boost right? You need to look into guages at least a boost/wideband and then go have the system tuned, if not you won tmake it long, IIRC they dont retard timing much at all on those base maps.

 

dude def get ahold of aam and get it tuned.the procharger when it first came out blew a bunch of motors.they didnt reduce timing at the higher rev,s.if not aam get somebody to tune it.

 

Yes, the underdrive pulley will mean less boost, so I'll have to order the 9psi pulley to compensate or put the original pulley back on. Boost and air / fuel gauges will be installed this coming weekend so I can monitor everything. Do you know any good places to go for tuning that won't charge $1000+

 

get it tuned ASAP and take the underdrive pulley off. my brothers procharged Z blew because it ran on the stock EMS.

 

AAM will be $700 or so but call and speak with somebody to verify...

 

so, just looking at an air/fuel guage and making sure it doesn't have a lean mixture isn't good enough?

 

No thats not enough ma,n I cant believe people do FI on a car like this and dont research their $hit. I dont mean to bust your ***** but I hope you take my advice or you will be making payments on a blown up Z and this will costs you damn near $10,000 in labor to pull the kit off, pull motor rebuild put together again, retune....do it right the first time.

A/F could be right on which for our cars FI is 11:1-11.5:1 BUT if your timing is stock all it takes is a bad tank of gas, a cool night and BOOM. Timing NEEDS to be retarded as the boost builds to prevent detonation. Even if your not hearing it now it doesnt mean your safe. You've come this far on getting the kit you need to spend $600+ and tune it, without it a well driven bolt-on Z could bust your a$$. At this point I would recommend 1 step colder plugs. A fuel system isnt necessary if you plan on staying at 400whp or less, over that Id look into it. If your running the car hard dont, try to stay out of boost until you get it tuned, having those 2 guages alone wont save you. Also, if your running that UDP take it off and put the stock one on, dont do a pulley upgrade to compensate for the under drive that is just silly. If you need any help or have any Q's feel free to post or PM me.

BTW just curious who did the install?

 

my friend and I did the installation (he is a mechanic). I'll be putting in 1 step colder plugs this weekend along with the gauges and I'll probably also put the stock pulley back on as well. (changing the pulleys on the supercharger seemed easier than changing the crank pulley, less parts involved) We should be able to set the fuel management system that ATI had with the kit to keep the air fuel mix in the required range, but we will have to look into the timing issue. one thing that he said would be to drive it easy on the street and say out of the high boost range and then run pump gas / race gas mix at the drag strip. I believe capitol raceway has unleaded race fuel so with stock timing it should avoid detonation. i might do that for racing purposes until I have the chance to get to altered atmosphere and have it properly tuned and safe for pump gas.

 

i really hate to say this but i see a giant boom in your future if you dont get it tuned.back in 03 when i looked at fi there was 2 kits out.i did some research and the ati blew i think 4 or 5 of the first engines that had the kit.i dont know if they adressed the timing issue but if i were you i def would not go to the track until its tuned.good luck i hope we wont add you to the i told you so list.

 

Chances are the fuel will also need to be tuned because you have other mods along with the kit. What part of MD do you live in?

 

I'm currently in Severn, MD. About 15 min from capitol raceway.

 

i work iom glen dirty man hit me uo some time and we cab meet uo twhen im not so drunkm,,..

 

damn bert it looks like you tied one on last night.sounds like me.

 

Goddamnit I didnt know I posted my dumb $hit in here too. Amazing how you forget $hit when you drink...

 

What alot of people forget about when tunning the Z is the timing map in the lower rpm range. The car makes peak TQ at 4500-4800 rpms and is running anywhere from 24-26 degrees of timing at that point. Timing needs to be flattened out throughout the entire rpm range not only upper rpms ...
With the stock EMS the procharger comes with, you WILL blow up, eventually..

 

boost guage is installed. unfortunately the under drive pulley won't come off so the kit is producing about 4 -4.5 psi. the 9 psi kit available should only produce around 5 - 5.5 psi which is still not enough. maybe it's possible to get a set of pulleys from procharger or altered atmosphere that would normally produce 11-12 psi and give me an estimated 7 - 7.5 which would work? would different size pulleys be easily available?

 

Are you f'ing crazy ??? Get a normal sized pully, they have them in light-weight alu, so you'll hardly have to give up any of the gains from the pulley. That and they are way cheaper than 360$ (what ATI charges for their 9, 14 or 18 psi pulleys)

How did you get this thing installed BTW ? With an UD pulley the belts don't fit...

And people, the only "tuning" that comes with the Procharger is the Automotive unit that drives the extra (inline) fuel pump based on RPM. You basically move sliders up and as a result you inject more fuel at the RPM the slider stands for.

Danny

 

personally i would never do an fi install myself. no matter how easy. the one
gotcha most people fall for is they buy the kit and think that all there is to it
is to do the install. anyone going fi should be doing it IMO under the guidance
of a good tuner shop. not that you can't do the install yourself, but if you do
it should be after having consulted a shop like AAM, etc.

 

AAM might be your saviour, I'd invest the $$$ in a quality tune.

Man FI sounds so scary, don't know if I'll venture there....