Getting 19~20 psi out of T-25!! Help!!!

[In2Deep522]

Hey everyone! Here is the problem! I just replaced my UICP with a 2.5" custom pipe I made out of madrel bent exhaust pipe running from the top of the IC straight through to the TB elbow. I am also using a 1G BOV. Previously, when I was using my stock UICP and BOV, I removed the BCS restrictor and was running around 12 psi.....now, with the upgrade I just did, when I punch it and am at WOT, I am hitting around 19-20 psi!!! I don't think this is a good idea with my stock T-25 right? I have a 1997 Eclipse GSX with 90K miles and it's an AT. Any ideas here? I am thinking about replacing the BCS restrictor so that calms the boost down a bit but does anyone have any other recommendations?? HELP!!!!

P.S. The car hauls ass!!! hahah but I want it to stay in one piece haha

THANKS!

 

[noyorol_1]

well u can buy a boost controller and turn it down i would give that a try

 

[Turbo98]

When I got my first UICP it did the same thing but I had a boost controller to turn it down with

 

[In2Deep522]

Is there a MBC that you guys recommend? I would like to get the Turbo XS Dual Stage BC but I cant afford it right now. Do you guys recommend one imparticular? Is one better than the other (ex. Joe P XZ or Hallman ES? etc.) Also, what is a safe level to run at? Around 15 or 16? Thanks for your help!!!!

 

[noyorol_1]

go to boostcontroller.com they are ok.if you want a used one i got a turboxs single stage i will sell you.if u want it hit me up at [email protected]......... other then that all you need is the boost controlller

 

[scuRRed whiTey]

uhm dont the newer gens have smaller turbos cause there heavy and slow and shit? heh j/p i dont think there t25s though, there like 13b's whatevr the hell they are called in those terms....but yeh its prolly too high and ur gonna kill it soon

so make a controller from home depot simple concept

ball and spring

 

[ECLIPSE4x4]

Originally posted by scuRRed whiTey
uhm dont the newer gens have smaller turbos cause there heavy and slow and shit? heh j/p i dont think there t25s though, there like 13b's whatevr the hell they are called in those terms....but yeh its prolly too high and ur gonna kill it soon

so make a controller from home depot simple concept

ball and spring

Wow you can make your own boost controller but you don't know that 2G's came with T-25's? HHHmmm .

I would suggest the new hallman boost controller. I have had Hallmans for the last 5 years with the new one being the evo pro rx.

Is the boost going up to 19 then falling back or staying at 19?

 

[In2Deep522]

Originally posted by ECLIPSE4x4


Wow you can make your own boost controller but you don't know that 2G's came with T-25's? HHHmmm .

I would suggest the new hallman boost controller. I have had Hallmans for the last 5 years with the new one being the evo pro rx.

Is the boost going up to 19 then falling back or staying at 19?

It's hitting 19 and then dropping to like 17 or so...it seems I have over boost and then it comes back down after the actuator finally does it's job. But wont a MBC help keep the boost stable???

 

[my95tsi]

Mine did the same thing but i was hitting about 26psi max. I got a Joe P for $50 shipped. Its the best boost controller out there and its not hard on your wallet. DO NOT make your own boost controller those are crap and people always have problems. Joe P is good b/c it uses a dual ball bearing design. Also to scuRRed whiTey t25 come on 2nd gens b/c they spool up quicker and give better response. 2nd gens are far from being slow and shit???? In fact they are faster than 1g's stock for stock.

 

[TalonRacer18]

Here dont waste money on a mbc when you can make one yourself.
http://www.geocities.com/chmwatson/FAQs/mbc.html

 

[In2Deep522]

Thanks alot everyone! My girl was keeping up on this shit too with me and she bought me a Joe P MBC XZ today on ebay for 27 bucks when I was at work and surprised me. I will keep in touch with you all and post my aftermath when I hook up the MBC next week. Thanks again everyone!

 

[noyorol_1]

good luck and have fun with the boost controller you did the right thing.well your old ladie did buyind that boost controller

 

[In2Deep522]

Originally posted by noyorol_1
good luck and have fun with the boost controller you did the right thing.well your old ladie did buyind that boost controller

Thanks, yeah, she is a pretty cool chick....(I think she bought it just so I would let her drive it hahahahahahahah)

 

[In2Deep522]

Yo, what's up? Ok, here is the deal...I installed my Joe P XZ MBC and I am still getting major major major boost spiking...it holds at the set boost setting on the MBC but after it stabalizes after the HUGE boost spike....here are some examples....I set the MBC all the way out the first time I drove it after I installed it....this seems to set the boost level to 10 psi....but when I am at WOT, it hits 13 psi and then comes down to 10 psi....a while later after I was adjusting....I want to adjust my MBC to hit 15 psi (what everyone recommends....) and then it spikes to like 20 psi.....I hooked the MBC up to the BOV line because I hear this cuts back on the boost spike alot but apparently not for me....any ideas? Thanks....

 

[In2Deep522]

Hey everyone, I was thinking.....I have about 1.5' on each side of the MBC hooking up to the BOV line/wastegate.....I am thinking about cut the line down drastically and hooking the MBC directly to the Turbo Compressor housing....maybe this will speed up the wastegate response time instead of the signal traveling all the way through the ic pipes, ic, intake manifold and then to the BOV line....I will try it out tomorrow. Let me know what you all think! Thanks!

 

[doodie]

I'm using a Ebay MBC I bought for 16$ and I have my stock T25 set at 16psi with no boost spikes at all. I guess I'm one of the lucky ones out there hahaha.

 

[In2Deep522]

How do you have yours installed? Spliced into the BOV line or off of the turbo compressor housing?

Originally posted by doodie
I'm using a Ebay MBC I bought for 16$ and I have my stock T25 set at 16psi with no boost spikes at all. I guess I'm one of the lucky ones out there hahaha.

 

[my95tsi]

Making the mbc hoses shorter won't help the boost spike. Here's your problem. I experienced the same thing. Don't hook up your mbc to the bov line, that would increase your chances of getting boost spike. Hook one end up tot he wastegate as usual and the other to the nipple on the compressor housing. You'll remove all those little hoses completely. Then turn it all the way down (counterclockwise) and go for test runs from there.

 

[EK97GST]

I'm running an electronic and it's also hooked up to the blowoff valve line? Could that be responsible for my spikes even though the installation instructions say to?

 

[my95tsi]

Honestly the best way an d more accurate way is to hook it up to the compressor housing nipple. I have my mbc set at 15psi and it has never gone past!

 

[Larry L]

OK there are 2 ways to do this and both work fine...I have mine hooked btw my waste gate actuator and the turbo and my teamate has his hooked BTW the BOV and the Waste gate actuator. In my opinion the placement of the MBC has little to do with boost creep. Unless you have an external waste gate your gonna see it in some amount.. However, I ELIMINATED this in my 14B by porting it and opening the waste gate hole in the exaust housing. I went big but made sure that the door still covered it when it closes. And yes the T25 is on the 2G...The 13b was on the AT 1G's....THe T25 is a much better turbo. It is used on the 300zx twin turbo, and on the JDM Silvia (SR20DET), Saab9 3, Mazdaspeed Prodige......It doesn't suck below 5500 RPM...

 

[doodie]

I took off the hose for the compressor housing and used that. Capped the hose that was going into the compressor housing and left it hanging. No boost spikes at all as of yet.

Originally posted by In2Deep522
How do you have yours installed? Spliced into the BOV line or off of the turbo compressor housing?