do you have any pics of how you modded the uppipe to flow better towards the wategate.

WOW! that wastegate is about $500!

 

Ask and ye shal receive....



JET

 

I have the utec with bcs and it works fine for me.

 

Well.... I guess I'll minstall my BCS then. It's only been sitting on the shelf for 7 months.

JET

 

didn
t mrc motorsports have post about successfully using a bcs with the utec. I want to say it back in january when it was posted.

 

interesting!

It would seem that the relocation pipes that TN now has puts the wastegate is a better location than where you placed yours....... BUT it looks like you have a signifiacantly larger piping running to the wastegate. That may be the problem with the TN setup......the piping and the wastegate oriface are pretty small.

 

^^ We're talking TN not APS here..

 

So you are trying to tell me that a utec system will operate differently with a different turbo kit? Dude, it doesn't matter if i had a aps, jwt, tn, lmnop, or any other kit. the bcs works. call up car version 2 in de (302-998-6988). they were the authorized utec tuners that did my car.

 

Like we've been saying. It's not the BCS. The BCS ONLY WORKS IF THE WASTEGATE IS WORKING PROPERLY. In this case, the open exhaust is bypassing any chance of wastegate control!

 

My bad. i was answering the question brought up during the thread, not the initial thread question itself.

 

Thats interesting. I wonder what the issue could be. A lot of people had the issue corrected with the overboost pipes. Has anyone tried measuring the boost at the compressor outlet.

 

I actually never installed my WG relocation pipe they sent so I don't know if it works or not.

JET

 

I wonder if the size of the WG and or pipe is the issue. Matt is running a Fujitsubo exhaust and I have the NISMO. I don't think either one is all that free flowing. Perhaps a bit more than stock but not like the TS that JET is running.

As far as the BCS goes, it or any boost controller can only limit the boost to what the spring limit is. So if your seeing 10psi with the spring then thats the minimum your gonna see with a BCS or EBC. You can try a lower spring like the 7psi spring. I do not recommend the 5psi spring though, I tried it and it sucked it is just too weak. The BCS with a 7psi spring should be good for up to 10 psi and might be worth a try. I never got to try that combo.

I think some people were confused that the BCS functionality did not work at all with the UTEC. But it does. It is not a cure for the overboost issue however.

 

The thing thats weird is my buddy in Cali has a Fuji with his kit and he doesn't even have the overboost fix pipes and his car runs 8 PSI only. Ditto for taurran when he had his boost controller shut off. Maybe its an altitude thing. It doesn't make sense the other people running the exact same setup as you on the same side of the country even are making a solid 8 PSI.

 

Subscribing

 

We got it to work on an APS ST running APS injectors, scott cams, forge actuator, etc. It took a lot of effort and time. It's not perfect, but holds 9.5 psi compared to a manual falling off. Check the link.

http://carv2.com/site/project_detail.cfm?id=443

 

You could always put a high flow cat in the stream. It's help us in the past on cars with boost control issues. You'll lose some power, but regain your safety.

 

Its all about back pressure inside the manifold runners and the size of the turbo exhaust housing.

Once u upgrade the exhaust (test pipes will double the problem) u will get less back-pressure over the turbine blades and it becomes a path of least resistance - IF the wastegate placement on the manifold isnt ideal. With a turbo as big as the TN, this is definatly the case.

ie. look how the PE turbokit gives the wastegates priority over the turbo. This allows accurate boost control with a small lift valve (gate). The other way to decrease backpressure over a less then optimal wastegate placement is by increasing the wastegate port size. For cast manifolds, this can be acheived by porting and blending and increaseing the wastegate size.

For steel manifolds u can add additional wastegate's, increase wastegate turbing diameter and/or increase wasetage size. ATPTurbo.com sell 38mm->42-48mm adapters.

 

Im going to install in the next two weeks and now am wondering if i should remove the stillen dual and put on the stock exhaust. another bonus is no need to make a custom reverse y pipe.

 

This is nothing new. We're all aware this is the exact issue with the boost creep issues, and is why the wastegate relocation pipe was made.

As far as installing the pipe and still having issues, this is the first I've really heard of it. Did the same shop do the install of 35ounces and down_shift's kits? Seems interesting that those with relatively tame exhausts are boosting to 10+psi when I personally am running a Fujitsubo exhaust and have never broken 10psi on the wastegate spring.

I'm not sure where the root of the issue is, but it appears to be something along the line of the problems many have had with the incorrect AFR's on the reflash. I'm partial to believe this has been due all along to incorrectly modified stock fuel pressure regulators during install rather than a reflash issue. But, it seems to be people's nature to point fingers at the kit rather than their own install work... but back to the present subject...


As far as my own issues with boost creep on this kit - I'm probably the first person to actually experience it and notify turbonetics of the problem. Since day one my car was hitting 9-9.5psi with the fujitsubo exhaust. I since installed the 5lb wastegate spring and an EBC. Things were just great for a couple months as I was hitting 8-9psi fairly regularly. A few months ago, though, I spiked pretty hard in 5th gear. I'm still not sure what caused it as I've inspected the entire system and everything looks fine, but since then I've been spiking to 9.2-9.5psi in higher gears (3rd+). I'm still not sure if it's wastegate or EBC related, but it seems to just be an issue with the boost solenoid not being able to control the wastegate properly under heavy load.

I'm going to be installing my wastegate relocation pipe (and a bunch of other things) next month, and will let everyone know my experiences with it. I'm fairly certain this will fix all of the boost creep issues in higher gears.