All the extra pulls with a not so great tune, trial vehhicle owners who have already paid, man I feel for the poor VQ under the hood, who knows how long that will actually last even if you have a 'good' tune when the deem it acceptable and release your vehicle back to you.
Damage could have already been done during all this tweaking/ experimentation, sure it could last a good bit but, knock, high EGT, bad ignition timing and boost oscillation can cause all manner of hidden gremlins.

To me my Z would not feel the same.

Interesting point. Never thought of that.

i see the stillen fanboys are changing their tunes.

No pun intended!

:icon18:

:inoutroflpuke:

:bowrofl::inoutroflpuke:

Scary item this morning: 1.0 g corner, fuel starvation with 6 dots left on fuel gauge, transitioning to full throttle at
6k rpm. Heard 1 or 2 detonations then engine immediately went to some sort of limp mode where it would cut every other ignition pulse above 3,500 rpm. Normally it just shuts off. It kept running, but making hardly any power. Oil temp was 180. Pulled over, restarted engine, now it runs fine again.

This is messed up. Fuel starvation with only 103 miles on a full tank? Come on Nissan, what were you thinking, this was going to be a straight line car?

I posted this in the Stillen thread because I'm running their supercharger with the small pulley. Lots of boost + lean a/f ratio = detonation. It wasn't much detonation, but still scary when you have no warranty.

wow, that sounds scary! SO It only does that when you're low on fuel? I still have some low end detonation on my car.

I heard that even stock 370zs will show some detonation once in a while, but I know that is not entirely relavent in your case!

I heard about that too lol, but my car has no ping before the SC. That was something I notice the very first time I drove it. I'm wondering would a lightweight flywheel will help out?

Low on fuel as in low in the tank or low in fuel as in AFR, he mentioned he had a mostly full tank when it happened but yes it is caused by a lean mixture.

LOL, yeah. The pic is that mod day @ Mike's. :ughdance:

Man this S/C has turned into such a disappointment. From the day this was announced I was excited with the idea of having a well designed supercharger kit with close to 500hp. But after hearing/reading about the problems people are having, it's really pushed me toward the GTM twin-turbo kit which alot of 370z owners seem happy with.

And the plot thickens. For a moment there, it looked as if things were coming around. I need to just lurk in the background and continue to save my pennies.

(Sidenote)
Stormcrow: I wish I would have gone for a ride in your car. Perhaps I would have been inspired to make a move similar to what you suggested to me that day at Mike's.
(/Sidenote)

well, the fuel starvation has nothing to do with the supercharger. I get it sometimes at two dots low with R compound tires on the car, and it stumbles for a bit before coming back.

Very Happy Stillen S/C Owner
 

Whew!!!!! First I have to say thanks to Kyle at Stillen. Yes, the Z was ready!!
I picked it up this afternoon from Uprev and was estatic on my Test drive.
Richard rode shotgun as he directed me to a fine strip of asphalt to test my wares. Oh, man guys! Just stick with this Kit. It is a beast. I still even chickened out a little and did not floor the pedal completely. I glanced at the speedo just once and was very rapidly accelerating past 110 when I broke off. Just Fantastic! It was very noticeable how much more powerful the engine seemed when driving. The sport suspension and Tires handled all that just nice. I kept the VDC on the whole time today.
Actually afraid to think what will happen if I don't.

After all this time, I have to say this was definitely worth it.

Drove it down to my home town and had many opportunities at stop signs to let the Z show me its stuff (which before the Z would go limp). No problem accelerating past 3rd with some nice punchiness to it. Actually had one panic stop in Austin traffic to demonstrate any deceleration problems....none. At cruising speed of a nice 70 mph the engine pulled along nicely up and down the rolling hills.

Apparently there is some sort of Error in the Nissan coding for the ECU directly relating to the Mass Air Flow sensors. With the Supercharger attached, the settings were severely being challenged sending trouble codes to shut down or disable how the engine works like "no air flow!", "sorry not running today!". So, the Uprev geniuses built the Tune around those codes to basically "ignore" them. Then they figured out the rest from there.
Odds of this happening are rare. But was showing up in my car anyway.

My Z will accept the next finalized tune (coming soon) in which my Nissan Dealer will be able to do that with no problems. They shouldn't have any.

Also, it is still important to have whoever installs the Kit make sure they completely follow the directions. I can even understand that pipes meant to be straight must be attached straight with no deviations for smooth air flow.
There was some minor adjustments made to my kit to help improve things.

So, if anyone has any questions on what the charger is doing I will do my best to describe any details. It has my full attention now when driving, well that and eyes on the road of course.

So, yes the Mission is finally accomplished!

A nice touch was that Uprev had my car professionally detailed after my Test drive. Poor guy worked on the front end Bugs for a while, trying to get them off. Been baked on for at least 4 months. It looked great and felt great to be in it.

Thanks to everyone at Uprev (Rich and Jared) and Stillen (Chuck, Sam and Kyle).

Now...to go hunting for some 'stang and 'ro.

Congrats. Now...

pics or it didn't happen!
;)

cool stuff. Richard and Jared are good guys. They will tell you how it is and help you out if they can. Glad your car came back together.

I hope for everyone's sake that they have the problem fixed. Congrats Buzz!

Know what would suck..if you returned the kit days before they found the fix...

:ohsnap1:




I'm willing to take the gamble that stillen will have numerous more failed tunes and get no where near the advertised numbers. Remember this is a custom tune. Tuned by uprev and has nothing to do with the stillen locked tune.

Buzz plz post dyno results

I fully agree and made the leap to Stage 2 TT's with GTM/ Sam. The final pieces should be here today, and soon, the build will begin.

Got my fall bonus yesterday - would have covered the entire kit.. Ah, what could have been.

well it will cover a GTM kit. with some to spare

I would also be interested in seeing dyno charts of Buzz's car. I asked for it from the GTM kit, its only fair that some proof come from here too.

Based on the timing of your comment, I'm assuming it was in response to my post. If it is, you've misunderstood what I'm saying. The 370z has a problem with fuel starvation. It's in the gas tank design and can be fixed with an aftermarket surge tank. I was posting because fuel starvation is worse when you're making 500 hp rather than 333 hp. That, and making the 500 hp with 9 psi of boost will for sure give you detonation when the mixture goes lean because the fuel pump can't deliver enough fuel.

My point was that I got fuel starvation at 6/16 dots on the fuel gauge. Granted, I was pulling 1g lat acceleration on an off camber turn, but it still happened.

If you get a twin turbo setup that makes even more power, this problem will be even worse.

I'm perfectly happy with my stillen supercher. I'm getting 329 lb/ft torque and 422 whp. It runs perfectly and is scary fast. Downshift from 6 to 3rd at 70 mph on the freeway and it starts spinning. From a 5 mph roll in first, open the throttle and it starts to spin around 3500 rpm, then just bounces off the rev limiter as the boost continues to build. Even with full coil over suspension that's set harsh enough that I get headaches on freeway trips, the suspension feels limp and mushy with way too much squat when I'm on the throttle in 1st-3rd gears. Basically, the engine is overpowering the suspension - and even motor mounts or driveline. When I come off the power to shift, I can feel the drivetrain "unwind". It's creepy and I worry that somethings's going to break. It never felt like that before the supercharger.

Likewise, I can't imagine owning a 370 without FI. I used to think the 370 was gutless even with full bolt ons and was getting spanked by stock camaros. Not anymore. The 370 is now a truely fast car.

As far as shying away from Stillen is concerned, they are the only company that has multiple forum members that are making over 400 whp in a 370z and they are the only company that has multiple forum members that have working cars and have posted dyno results. So for all the hoopla about how bad Stillen is and how good the competition is, Stillen is far and away the points leader for the 2010 season.

You are running a custom tune correct? Not the stillen locked carb tune?

Stillen doesn't have a carb tune. They may in the future, but not currently. If they submitted rev1 to Carb and it get's approved, there no way anyone is going to run it because even though it worked well on their car, it was with the 9psi pulley and that tune wasn't working on a lot of other people's ECU's. Once things settle down and everyone is reporting that R8 or R9 or R whatever is working on every car, then they will submit it for CARB approval. At that time, yes, I'll run the CARB tune.

Like I said before... anyone could tune the car, including stillen. The issue is not in the tuners or the physical kit. Every kit that has a custom tune is working great. Its all a matter of fixing the damn issue that their "custom uprev system" is causing as Buzz said. Once that is fixed (if its not fixed already) then we should be seeing 400hp cars popping up everywhere.

But will it and can it be fixed with the locked uprev program? Why waste all of our time and release this kit and tunes before it was really tested on any cars? The kit was marketed to be a turn key kit. Not buy the turn key kit and wait four months of failed tunes and then go get a custom tune. Stillen cant figure out how to tune it so they send the customer to uprev for a custom tune and poof their goes your warranty. Stillens off the hook. Thats not fair for the 80% of the people that bought this kit as a turn key kit and got tired of waiting for stillen to fix the tuning.

so should i buy a system that is still not "fixed" as you say or should a person buy a kit that is functional and as advertised? seems like the second option would be the way to go if you were spending hard earned money

Tom, Stillen didnt lie, they extensively tested their kit in every situation they could and on several cars. Chances are though that when they did the testing they used normal osiris software with normal tunes, which they assumed would be no different when they used the other software/tune. It seems there's a glitch thats causing headaches. If the kit/tune works perfect on custom tuned cars then it can be absolutely fixed. Its really unfair to expect that they could predict that problem and test for it before the fact.

^^^ no that is exactly what they should be able to expect. seems the other kit out there can supply canned tunes without 7+ revisions to the tune

maybe its not the tune/uprev but perhaps the hardware Stillen uses??

They really didnt do extensive testing since they didnt test their tuning solutiuon according to u. They would of had a better idea of the problems if they used the hardware (two different pullys) and the software from the kit they are selling.

Your credibility suffers when you try to sell GTM products every single post you type. You do it so much that I now associate you with GTM, their company and their products. I wonder if that's what Sam wants..

Also, as far as I know, there are no results yet other than your "6 psi" pulley and all the other results that people don't want to post until everything is as it should be. There's a whole other thread about the results, why don't we see any dyno graphs posted on there?

I'm making a lot of logical assumptions based on what we know. Like Buzz's post and everyone else who has been dealing with the issue. It seems to be that they didnt expect there to be a glitch with the tuning software considering they had been using the software on every car they tested successfully.

Anyway, not here to defend Stillen. I'm a customer, the results will speak eventually even their reps themselves won't. I don't blame them for not posting with how easily everything can be twisted to mean something else.

That's pretty funny of you to say since most people on here associate you with Stillen.

Owned!

Dyno numbers: I asked about a that and Rich did not offer up anything for me. I tried to ask a lot of questions in the couple hours we had, but we could have talked for hours on the particulars of this mess. Meanwhile his cellphone was ringing off the hook. I was excited to see my car detailed to the Nines, jumped in like it was the Batmobile just to beat the Austin traffic, cape and all! So, I missed that one. I will ask them again for something solid. I understand that really means a lot. Sorry to let folks down on that. Rich is the salesguy. Have to see if Jared can provide me something.

Also, I agree with RCZ with this Issue. It seems to be that they didnt expect there to be a glitch with the tuning software considering they had been using the software on every car they tested successfully.
This was a surprise and apparently it was a big eye opener.
I'm a Nuclear Engineer myself and I could not even figure it out. I had my assumptions, but not the tools they did to get "at" the problem. Who would have expected an error from the Factory itself on, oh, say line 1,347 of 10,000 lines of code when there should have been a Zero there was a One. As complex as these cars are nowadays and the computer trying to control EVERYTHING, I'm amazed Uprev even found it. It took all 3 of them to watch the car, dyno, output reports (Computer) all at once to catch it.
My assumption is WE are going to be the last of the great combustion engines with enhanced power like this. The Government is tightning down every year. Heck, I'm sure in a few years some Yahoo will outlaw the combustion engine just because its screwing up his flowers in the Garden, turn it into Law and we are all driving electric, or Hydrogen Electric. The cars will then be more complex and no room in the ECU to work a Supercharger or the engine compartment. Well, the JUKE was in the showroom today, a bold statement for cramming a lot of power into a small space. Has a 1.6 Liter engine, I think, with a Turbo attached!