Help me out. Steady high boost w/ t-25....its weird!

[De Ruyter]

Ok guys I need to hear what you have to say on this one. I have had my eclipse for about a year now and just put a new clutch in the other day. The car is running as great as it did the day I bought it. It really is an interesting car because after I bought it I found all sorts of different wires going here and there, many of them were grounds. It was very obvious that this car had been modded in the past. For starters it already had a 1g blow off value, some old exhaust, ngk plugs and the modded intake tube. It only had 29k on it when I bought it and it was a 97 so I have no clue what the guy had planned with it or what internals . Ok well time to get to my real question. I have read countless forums about boost lvls for the t-25. I know everyone says that it can’t and should not be pushed over 16psi. People say it just won’t hold the power due to the blow and how the turbo is designed. My boost controller is a Apexi ACV-R. It has 3 settings and they are A, B, and off. Off runs 16psi max by itself I can’t control that one. Right now I have A set for 1.2 bars which calculates out to 17.64 psi. now I know most people say its just as fast or slower then 16psi but it is definitely not. But thats not all it gets better. I have my B to set to 1.35 bars which calculates out to almost 20psi. Now don’t think im running around on this setting...god no. In fact I only used it once and that was against a Lancer EVO. The point is I feel and even bigger difference here then I did from the shift for off setting to A. So what is the deal with my car. If im not running as “efficient” why do I feel so much more power. Also do any of you think maybe I have better injectors or even maybe a 14b. If so, how could I tell? I guess thats all I have really to say. Oh yeah one more thing. My boost pressure in high setting doesn’t drop much after 5.5k in fact only about .05 bar at red line. Well tell me what you think. Thanks.

 

[14.5 drift]

14b

 

[ohio98eclipse]

well if you have a bigger turbo 17 psi is a bit dangerous without a fuel pump and injectors...but easy way to tell if its a 14b/16g or anything in that area is look at the housing on the turbo and it will say TDO5 that means you dont have a stock t25...if it says TDO6 you have a enlarged housing and blah blah bigger turbo...now if it says .504 tr or some crap like that it could be a t25 or maybe a t28...but my best advice for you would be to turn the boost down to 15 psi or so till you figure out exactly what you have in your car...find out if it has a fuel pump or injectors or whatever cause 17psi is a bit dangerous to run you risk hitting fuel cut...which could cause problems.

 

[De Ruyter]

I'm sorry to say that i have hit fuel cut before. Since i have have an Apexi AVC-R it trys to control the duty itself and keeps adjusting till it is hitting the targeted boost. However, if you alter the targeted boost it has to learn all over again. While it is learning the boost is out of control as it goes up and down. I hit fuel cut but it was only at 1.45 bar which is about 21psi. This is the only time i hit fuel cut because i now know the feeling and i really hate it. For everyday driving i run it on the off setting which is about 16 psi at max boost. I would set it lower but i feel this is what the turbo is comfortable with because of my intake and 3inch exhaust that runs from the exhaust manifold back. Thanks for your help about looking at the turbo. Ill go look right now. Anyone else have suggestions?

 

[ohio98eclipse]

well if your hitting 21 psi you sure as hell dont have a stock pump and injectors..prolly runnin 550's and a 250lph something or another..just look at the inside of the turbo...if there single fins but its a tdo5 its prolly a 14b..if there double fins it could be a 16g big or small

 

[De Ruyter]

hmm how could i check for sure. i don't want to think im running on better injectors or pump?

 

[OneFastEclipse]

Look at your fuel injectors and see if you can see anything that does not look stock. (stickers, paint, etc.) To see if your pump has been modified, remove your back seat and look at the silver panal to the right, check and see if it has been tampered with or if there are aftermarket wires going to it.

 

[Trctnless]

14B ??? Since when did 2G come with 14B's THis is about a T25 (stock 2G) holding boost right? I think it would be obvious, if you had a 14B you'ld know it.

Identify your Turbo if you havn't allready T25 on Left, 14B/16G on Right

http://www.roadraceengineering.com/parts/turbos/turbos.jpg

somebodu coulda throwna T28 in it. If it looks like a T25 but has twice the compressor blades and Bigger fan Like this that would explain alot.

http://www.roadraceengineering.com/parts/turbos/t-28with-25.jpg

I have the same quandry about my fuel injectors and pump. I'm running a tune fit for 550's and as far as I know thier stock injectors and the car is happy...... Its forcing me to buy 660's and a pump just so I know whats in the car.