The worse is 5th gear when it peaks at 10.5 psi at 100% duty cycle

I'm still for TN. But this problem has to be solved!

I will check out the fuel press reg.... Although everyone I've talked to has said the 380's are a bit small (Tuning factory / ESP )

Going to pick up the car in a bit... Need it for a roadtrip up to Canuck Country. After that, I may need to start planning some more mods to solve some issues.

 

My car has a CJM fuel return system so the FP is regulated fairly accurately. I don't see how that would cause the overboost anyhow. I also tried the 5psi spring and a BCS but response was lackluster with that spring so I returned to the stock spring.

I think its funny how people point the finger at the install when the kit is so simple and the problem so prevalent. Heck I've had 90% of the kit reinstalled by now for various reasons. I'm pretty sure its just the WG but overboosting a little doesn't bother me that much and I may end up pulling the kit soon anyhow. FWIW, I did report my outcome to Reggie after I had the relocation kit installed last winter.

I'd be surprised if the relocation kit solved your issues but you never know. I thought Kelly was the first to report the overboost problem? Maybe he just lived with it the longest. I never heard though, did the relocation kit solve his overboost in the end?

 

It was solved with the wastegate pipe. I'm not sure what makes these few cars totally different (the best guess would be install related).

The denso 380cc injectors WORK. I get (and everyone else with a proper install) get consistent AFR's accross the board. What else is there to complain about? The FPR is modified to achieve higher fuel pressure and must be done correctly.

If yours is off, you've either installed something to change air/fuel delivery (like an SSV), have a bad injector, or have installed the kit incorrectly. Most people on this forum experience the latter, but instead of correcting their install choose to smooth it over with tuning and complaints. Try going back to the root of your problem and fixing the install before throwing more money at it.

 

OK, perhaps you should read my reply? The FRP part was not related to overboost, rather to illustrate a point that people tend to point fingers and throw money at a car rather than fix their problem. Of course your car runs at constant AFR's now - you threw out the stock modified FPR and replaced it with a full ($1100) fuel system.

I think it's funny how people seem to believe that their car is magically so different than everyone else's car/kit in this world when there is only one thing that really differentiates them, the work done during install. This IS the most logical explanation, as it is the single largest variable in the equation. Saying "oh well, who knows" and throwing money, parts, and tuning at the car might smooth over the problem in the long run, but hardly seems the most logical response to me.

How can you possibly say you'd be "surprised" if this fixed any boost creep issues on my car? My car has been excellent since day one. Only recently have I had issues with returning boost creep, since installing the EBC. I regularly hit full boost in my car in 3rd-4th and hit 9.1-9.5psi. Not too bad if you ask me for having the old wastegate configuration, and seeing as I have my boost controller dialed in at 9psi. When I run 8psi on the boost controller, it creeps to 8.3-8.7 in 3rd+.

Well, anyway, saying that you don't think this pipe will fix the issue isn't logical. There are only two possibilities - that the wastegate isn't being controlled properly under heavy load, or I've somehow missed a crack or leak in a line somewhere. Due to the excellent responses received from the wastegate relocation installs in the past, I'm going to logically say that it will be resolved with the pipe.

Keep in mind that I had this kit installed and running before anyone else here even had it in hand (besides MIAPLAYA). I brought up the issue to Reggie the week after my kit was installed. He had not heard of it at the time, and we discussed getting me a new wastegate spring (which we eventually did). Kelly was the first one to have the issue to the extent that he did, and in turn was the first one to actually start a thread here on the forums dedicated to the issue.

 

I have to agree that the overboost correction pipes fixed the issue as exhibited using a topspeed exhaust. Turbonetics took their test G35. With the stock exhaust the car made 8 PSI all day every day. They installed a Topspeed Pro-1 exhaust and the car hit 10.5 PSI. They used that car to design the new pipe. With the new pipe in place the car went back to hitting 8 PSI all day. Even RedHOtZ tested this on his own car with the RSR. he was overboosting to 11 I believe and went to 8.5 after the correction pipe. My point here is that obviously that pipe did something to people who had this issue. if it is not working on another car there must be some other factor at play here. Especially is your setup is identical to someone who is not having this issue.

 

Well Matt's car is behaving oddly (AFR). I don't know why and don't want to try to guess but the overboost issue is exactly what I am seeing.

I say that because of my experience and from what I have seen with others, it does not solve the issue. TN didn't seem overly surprised when I told them it didn't work either.

Not trying to argue with you Craig but YOU are the one pointing to install issues as the logical explanation. I don't see how there can be too many install issues that would cause this problem. I spent a lot of time looking at this issue last winter. At this point there isn't too much more to check out or try and I just don't care enough to invest more time and $ to try to resolve it at the moment.

 

Matt,
I have a set of 380cc injectors that you can try if you think it may be an injector.

 

If it was installation errors, then why with stock exhaust everything was working 100% according to TN. I dyno with good A/F ratio across the board and only a little rich up top. After the after market exhaust put on, then the boost creeps. Then installed the relocation pipes and it's still show the boost creep. My FPR gauge shows 58 psi at idle. It's been like that since day one. I'm not blaming the kit, but would like to find out how to get it fix.

Patrick

 

3 Overboost problems out of 3 of us here in MA.

Look at the Wastegate piping and measure the diameter.. take a look at the 'flowing' design. I'm in now way putting down the kit for what it is ($$ and f/i) but there are flaws.

I have to say that the FPR could have been mismodified, I'm willing to check anything and everything. But like I said, overboost is overboost. If it's going to overboost to 10.5, let's hope it can have the fuel delivery to keep up.

I did not say my injectors are busted nor malfunctioning. I was just putting the point up that the 380's leave very little room for upgrades.

It's funny how it use to be TN guys vs the APS/other guys.. Now it's a few TN cars that see some problems that want to be solved and are getting owned by the TN defenders.

You guys can keep saying the pipes fixed the problem, but the problem is still there.. It doesn't get anywhere. Anymore suggestions to discuss?

Btw, install-wise most of the kit in the engine bay has been taken out 3x by 3 different shops. Each time I've had them look it over to make sure everything was fine.

Most of the hardcore TN guys (except MIA and a few) have been playing with BCS and a different management route. Yes the kit is made for a stock car, it does most of what it's suppose to do with some minor flaws. But the amount of money to put this kit to work at it's 100% efficiency could've been used for a better kit.

 

I was questioning if this was really a coincidence. Sucks you guys are having problems, but I was questioning if there was a common issue with these cars as it seems quite unlikely that all in a local area would be having problems by pure chance.

Every kit on the market has "flaws". It seems that the people with this kit in particular like to blame any and every issue on what they percieve as a typical "flaw".

Reread my previous post. The FPR issue was brought up to illustrate another point entirely. I realize it has nothing to do with overboost.

This is why the sell a "tuner" kit.

Please... No one is getting "owned" here. I've watched for a long time as people bashed this kit and the reflash in particular because they did not understand how the system works, and refused to believe it could be an install related issue.

This kit's lower price and simplistic nature tends to attract many people who don't understand how an FI system works. Now, I'm not saying that I'm any better than the rest, but it's nothing new.

I'm still trying to decide what your problem may be. It's nearly impossible to do this over the internet, especially when there are relatively few people having the same issue as yourself (after the pipe was installed).

I guess the most logical question would be - have you taken the hour or so worth of time to install your stock exhaust and see what your boost is at? I know its not what you want to run but it might give you a good idea as to if it's back pressure related or not. You'd think with all the thought put into this, you would have tried this as one of the first troubleshooting steps.

By my train of thought - you never really know if it was REALLY done right until you check it yourself. Until then you're just taking someone else's word for it.

I'm not sure what you expect. You're going to have issues with ANY FI kit you install on this car. That is the nature of the game. The fact that three cars in such small proximity are having so many issues leads me to believe that we're not hearing the full story, or that someone up there is doing something wrong. If many others have been having this issue then they need to speak up.

However, I could very well be wrong. For that reason, try putting your stock exhaust back on and tell us what happens.

 

Sorry if I sound like I'm a bit pissed in my previous post lol... I don't mean to be that way, just had the kit for almost 8 months now and been trying to solve these problems ever since!

Already did the exhaust thing. Had the stock exhaust on the car 2x-- Had it on the car when I had the kit installed for about a month. Then a few weeks ago, I had the stock exhuast on thinking I was going to get rid of the Fuji. The overboost problem is still there.

 

If you had the stock exhaust on and are still having boost problems, then there is definitely something wrong with your setup that is totally unrelated to backpressure changes caused by an aftermarket exhaust. Therefore, it's a given that the overboost pipe won't work.

This is exactly what I was getting at in previous posts. If this is the case it appears your problem is totally unrelated to design issues with the kit, but rather a defective part or improper install. Forget about the overboost pipe entirely, this is something entirely different.

I'm still not sure exactly what it might be, but I'd definitely go through and triple check all of the lines to/from the wastegate and verify that the spring is seated/installed correctly. Have you tried changing the wastegate spring at all?

 

Z Phat Z from NY says he has the issue. Who's the third MA guy?
I'm sure there are others around. I do not buy the idea that its specific to just a couple of us.

 

Guy in MD here has it also. Has seen as high as 11psi on a UTEC log...runs a 3" AAM single exhaust. I have no clue why this would fix soem cars and not others but I hope you guys figure out whats up. Especially those with the flash who's fuel needs likely cant be met.

 

Wait with the stock exhaust you still crept on boost? That doesn't sound right at all. Can you all who still have problems out line your exact setup. Every md you have and where you live would be the best data.

 

TN kit with re-flash
Crawford plenum
UR pully
Borla TD exhaust
Buffalo, New York.

No boost creep with stock exhaust.

 

how much hp are u seeing before u hitting 100% duty cycle on the 380cc injectors?

 

how bout we all just reinstall the stock exhaust.. I was thinking of doing it but its so heavy and fugly

 

When you are boosting 15psi the stock exhaust isn't an option.

JET

 

No but it would be interesting to see if the problem does persist on all of the cars with the stock exhaust.