evilz. when you were driving, at any time did you go into 5th or 6th gear at WOT pushing hard?

 

Ravez, I have been full throttle in 5th and 6th gears...what should I be cautious of???

 

How many times have you?

 

i would say only twice. Are you saying the car runs extra lean here?

 

What I'm saying is................................ Yep. WOT in 5th and 6th gear lean out alot, I've heard like 17:1 or so... I have spoke to several people about this, and they confirmed it as well. I've also heard that above 6k it leans out too...

 

keepup, if your fmu is tuned properly it won't lean out at the higher RPM's. Mine actually gets richer as the RPM's go up. It's all about the tuning.

To the other guy who's car smells like someone lit a match. It sounds to me like your car is running rich. I get the same smell when I get on my procharger. That smell is the gas being burned up in the catalytic converter. About the vibration, I'd have your installer check to make sure all of your bolts are tight and pulleys are straight.

 

I even had my FMU tuned so that the last slider doesnt even activate.....meaning that in the upper rpm ranges it is running rich, just in case.

 

Huh??? The sliders are there to provide a broader range of fuel pressures. By tuning it with four sliders you are decreasing the accuracy of the fuel delivery. It's not gonna hurt your engine or anything, but you'll be running approximately 20% richer at the beginning of each slider boost level to ensure at the end of the slider setting you're running a good fuel ratio.

With five sliders at 7 PSI of boost, each slider takes care of the fuel delivery for approximately 1.4 PSI of boost. What you've done is cause each slider to deliver the fuel for 1.75 PSI of boost.

 

Just curious, what does this pro charger do for performance? 0-60, 1/4 mile?

 

Don't really know. The hardest thing for me when taking off is keeping the tires from spinning, so I'd imagine it's not a super big 0-60 difference.

 

"DISCLAIMER: The author disclaims any liability, loss, or risk incurred as a consequence, directly or indirectly, of the use and application of any of the contents of this post. This information is not a substitute for the advice of a competent mechanic, tuner, or manufacturer."

You must be a Lawyer

 

yah... huh!?! who told you that / who tuned your car?

 

I was married to a Lawyer for years. The bottom line; it is hard to get a straight answer from them even if you are paying $250 per hour. The only straight answer you might get is how much they charge per hour. Even then, the amount of hours they need to work to do the job might change later.

You guys know what is the difference between a dead snake in the road vs a dead attorney? The snake will have skid marks in front of it!

 

With my GTech accelerometer I had read a 5.1 sec 0-60 but you get a ton of wheel spin. I had a 13.1 1/4 time with a 112.7 MPH "trap". Again, if I practice a little, I should be able to improve on this. These were the best of three runs I did.

 

I'm just saying... From what I've heard (reliable sources), 5th and 6th gear on a highway run, it leans out. Who here has ran past 130mph more then once with the Procharger? Honestly.. I always hear, Oh, I've ran to 120, 130... Who's gone higher. I just find it real odd that there's only been like 1 person on this board that's ran the 1/4 mile with this kit, doesn't that seem fu*ked up? Somethings not right here...

 

Good observation. Maybe we are getting closer to findout out the specific problem related to procharger.

ravaz: When you said "Somethings not right here... ", I think your burnt piston has been trying to tell you that for months. Are you still going to install the ATI SC on your motor? Maybe a Vortec or something that manages the lean condition at all rpm levels would do you a better job? You seem willing to throw $ at fixing the problem. I am just suggesting that due to lack of being able to tune the ATI in all rpm levels, it might be cheaper to just replace the SC (and sell your ATI used to someone) than buy a lot of parts to make sure the car can run lean with the ATI.

I hope whatever you do, it gives you the performance you want without having to tear your engine apart a 2nd time. You must be bummed not having your new Z to drive. You lost more than the cost of parts to fix your Z. You lost money as it depreciated from getting older, loss of use of the car as well.

Jeff

 

Haha I know my pistons were telling me somethings wrong this whole time What I'm saying is, it's just odd that so many kits have been sold, yet 1 person in the past 3 or so months has gone to the 1/4 mile. Seriously, I want to know who with the ATI on their car, has gone to 130+.. I guarantee it wasn't many times, or their sh*t would be blown like mine.. I know 5th and 6th gear at WOT cause the issues we are seeing, I just know it.. Am I going to install the ATI on my car again? Fu*k yeah. Taking a different approach, with the FMU and inline pump on the car. I'm going to run it on my stock motor with 7 pounds, and something else... I still am going to build the old motor up, just in my spare time over the winter, and it's going to be sick when it's finished. I'll even use the ATI on that motor too.. I'll tell you what. Upgrade the stock injectors to like 380cc or so, keep the FMU and inline pump, and I bet you'll be fine. That's just my take. I'm going to give that a shot, and ride around with a Wideband O2 for a little while, take it to the track, etc.. Good thing is, when I put the built engine in my car, that gay ECU is gone thank god.. It's sad that ATI hasn't addressed this on here at all. I know they are watching. It's also sad that they know that the stock injectors are causing all these problems too, even with the FMU and pump, I know it for a fact that they do... I think Vortech is taking a good approach with this. They will be retarding timing.. Even if it's not that much, that's still awesome that they are doing this. That's important.

Honestly, I'm not that bummed about not having my Z this whole time. I'm just happy that I got it back in my posession and I can start the work on it next week myself. I'll have that new engine in the car in a few hours, most of the plumbing for the kit is still on there, the inline pump is still there, so it's going to be a quick install for the ATI. I'm going to change is that bypass valve, it's kinda cheapy. I have a great tuner in this area that's going to help me out with that, and as far as the build, me and a few friends can knock this out without a problem. I've kept pretty quiet about this for a while, too long. Not anymore. I'll figure this crap out.

 

I have gone to the track with my prochager. I made three passes. My best was a 13.1 at 105MPH. With an auto the car doesn't shift under full boost so you really can't go above 5K without the car jerking and slowing down. That run I shifted around 4.5K-5K RPM, just before you hit high boost. This car with the kit is an easy 12 sec car once the shift points are changed.
As far as your theory about going 130MPH with the kit and it blowing. Not true for me. However I will say that I have sinced added HF cats and have babied it (under 4.5 RPM and under 60 MPH) until I get retuned.
Good luck with the install. I was really hoping to see something work out with AA and that you woud have some mean Z to to tell us about.

 

ravaz:

Speed = money and you want speed and you are willing to pay for it. I am sure you will get it sooner or later and will have an awesome car.

If I was ATI, I would be sending you Christmas cards and flowers on your birthday. I am amazed how faithful you have been to a product that has been far from trouble free for you. The R&D you are doing should have been done by ATI prior to it being released. Ironically, even though you are doing it, they are quiet and not even involved in helping you figure out the problems related to tuning their SC. I bet once you figure it out, they will modify their product based on what you have learned. I can see the webpage now bragging about how they are leaders in SC technology and about being the first company to do (whatever you figured out to fix it) on the 350Z.

Some people play it safe (me), some are mild risk takes, and others are on the cutting edge. It takes money an guts to push the envelope like you are doing. Just because I am not a risk taker as far as pushing mods, it does not mean that I dont admire you. You are providing information to all of us. thanks, good luck, Jeff

 

Dude, where are you getting this from? The ATI kit does allow you to tune the a/f ratio at all rpm levels. If the tuner doesn't know what they are doing, then its very easy to screw it up. If there is any advantage at all to another kit, its the timing retard under boost that the Vortech will have.

Now, as far as the lean condition in 5th or 6th gear....it is a very real possibility that you could have your car tuned safely for lower gears yet experience detonation in higher gears. When you're in a higher gear, you will be moving at a higher speed. Higher speed means more load on the motor, because as speeds increase aerodynamic drag increases. These higher loads on the motor will make it more likely to detonate, especially if its tuned on the ragged edge as far as a/f ratios go.