Getting new FMIC and hard piping

[Prodigyman]

Just got my 97 GSX and buying new upper and lower intercooler piping and FMIC. I have a stock turbo with stock parts like injectors and such I presume.

I have aftermarket intake and 3” custom made exhaust (from the turbo back) with Magma Flow High flow cat and muffler with Greedy Type S BOV venting back to intake. I am wondering what is the safe boost I can pull with this setup and stock T25? Is it even worth installing all that? @ Stock boost ~8 PSI I believe would it make a difference with the piping and FMIC or would it create more backpressure for the small turbo to pull? Would ~ 10-14 PSI be okay with this setup?

Any suggestions and your answers are appreciated.

 

[notractiongst]

10-14 woulda be fine anything above 16 i bleieve is pointless

 

[CanadianTSi]

15psi will be fine everyday and you ight see some small gains from a FMIC.

 

[Prodigyman]

15psi will be fine everyday and you ight see some small gains from a FMIC.

Small gains from stock boost or even @ 15 PSI? So should I just stay with stock side mount and still run it @ ~ 12 PSI? Or once I go higher then stock FMIC is better? I mean I am getting one for a VERY good price ~ 320 CAD (~280 USD) and its a large one too. Also @ 12-15 PSI range with stock parts would be fine? Because I still want this car to last so maybe 10-12 PSI when I drive and 12-14 PSI when I race...

 

[DSMunknown]

the reason, as i understand it, is that you will be pushing the t25 over its limits (refering to reliability) over 16psi. the fmic will definately help, but it will help much much more if and when you upgrade the turbo.

even with upgraded fuel components, air flow going into the comressor, air flow exiting the turbine, and basically everything in between is like giving a grade schooler 7 college grad classes- the kid's brain will be ready to explode . that is, if you go above 16 constantly. i suppose if you bump it up to say 19 every one in a great while, it wouldnt hurt it too much, but you will still be pushing the reliability issues here.

ever thought of upgrading to some form of a 16G ? would do wonders for ya. perhaps upgrading the internals would help, but imo it would be sorta pointless. i mean, it would definately help with torque, but putting a new turbo in seems easier.

 

[SethA]

I think the 2nd gen stock BCS should already be giving you around 13psi? If it is only giving you 8psi you might have boost leaks or some other problem. If you are only guessing that you are running 8psi you should buy a boost gage before running higher boost. As stated before, using a MBC to up the boost will tax your T25 and if you get really carried away the little guy will eventually fail. Then you will have an excuse to buy a bigger turbo. Turning up the T25 will get you more power but it will mostly make hot air because it will be operating well above where it is most effiencient. If you can get a good deal right now on the FMIC now go for it and install it now. I ran a front mount with my T25 for a while with no ill effects. You will really start to have fun when you get a bigger turbo.

Seth

 

[CanadianTSi]

With the basic bolt-on's (Intake, exhaust...) you will be fine running 15psi daily.

 

[Prodigyman]

But I though Eclipses stock came with ~8-9 PSI… As for the boost gauges, I already got my Pillar pod with Boost, A/F, and Water Temp gauges; I just have to hook them up Same goes for GReddy Profec B-Spec I just got. Also I would not be putting anything remotely close to 16+ PSI nor plan on doing so, not sure were you got that idea. If stock is ~9 PSI I be pushing it around 12 and when I want power then ~14 PSI.

So FMIC/Piping would not do me any good unless I get like 16G or T28?

 

[Well Traveled]

When I had my 97 gsx, I ran 16 psi on my MBC and never saw problems. I ran it this way, often hard, for a couple years, and when I sold the thing, the turbo had no shaft play whatsoever. However, the difference between say 12 and 14 psi was hardly noticable. 16 psi would give you great midrange torque with boost dropping at higher rpm. If you keep it at 14 psi and rarely beat on the car, the turbo should last a long time. I would buy the front mount, but don't expect big gains since you can't really up the boost. Definately good to have for later though.

 

[CanadianTSi]

Stock boost was 10-12. 15 will be fine, I run 20 everyday on my bone stock 220,00km motor.

 

[Prodigyman]

Stock boost was 10-12. 15 will be fine, I run 20 everyday on my bone stock 220,00km motor.

Ahh i got it! Thx for your help guys

 

[fulanititoo8198]

It wont help that much but it doesnt hurt either. Just make sure you upgrade your turbo shortly after because if not you start feeling a little silly rolling around with a big fmic and a tiny snail turbo.

 

[Prodigyman]

It wont help that much but it doesnt hurt either. Just make sure you upgrade your turbo shortly after because if not you start feeling a little silly rolling around with a big fmic and a tiny snail turbo.

i know what u mean! I feel that way already

 

[Jazzie6044]

From everything ive heard on the 2gs, you will be able to run around 14-15psi, even with just the stock intercooler with no problems. you will want to make sure that youre not running out of fuel at that point, so either a fuel pump rewire or a larger pump would be smart. at the 15-16psi mark, the stock turbo will run out of airflow. it just cant move enough air to keep up at that point, which will result in a drop of boost. but a lot of people run with 18-20psi (with fuel upgrades) on stock motors all day long. the front mount will be a little overkill for now, but at that deal id get one. have fun

 

[pboglio]

You guys are killing me with these boost numbers. A stock 2g runs 13 psi or so. You can run a T25 at 17-18 psi with a boost controller, exhaust system, airfilter, and 1g CBV with ease. Stock fuel pump and injectors are more than up to the task. If you rewire the pump, you might need to get into fuel management, but it ain't a bad idea.

The T25 can't hold boost to redline because of the weak wastegate actuator and large stock wastegate flapper getting kicked open. Buy something like the FP 17 psi wastegate actuator and your in business. The T25 makes some damned good midrange torque, especially with 17-18 psi in the midrange. Keeping the boost low is retarded, just bump it up and watch your 02 volts.

 

[logic]

You guys are killing me with these boost numbers. A stock 2g runs 13 psi or so. You can run a T25 at 17-18 psi with a boost controller, exhaust system, airfilter, and 1g CBV with ease.

What he said. I was running 17psi daily (with the obvious drop-off at higher RPMs) on my T-25, with stock injectors, sidemount intercooler, and non-rewired pump. This idea of only running 15psi is ridiculous, especially if you have an FMIC for cooling. If the turbo could actually hold 17psi to redline, you'd start pushing the limits of your injectors and pump (with a 14b, we topped out the 450s at about 5500 RPM with 17psi), but a T-25 won't have that "problem".

 

[Agent11br]

18psi all the way, I ran it on my t25 for over a year with all the supporting mods, no fuel mods, and it pulled like a mofo, and I had no shaft play whatsoever when I sold it. I dont think people give the t25 enough credit. Alls you have to do is crank the boost on it and the fact that it does drop off becomes negligible:

Lets say you have it set at 15 and it drops down to 12-13 when you top out in 2nd for example. If you crank it to 18 for example, I was dropping out at the top of gears at around 15ish, and thats with no new FP actuator. So where I drop off at is where you start at. Seems like common sense to me.

Crank it and that fmic is only going to create lag IMO

 

[Prodigyman]

18psi all the way, I ran it on my t25 for over a year with all the supporting mods, no fuel mods, and it pulled like a mofo, and I had no shaft play whatsoever when I sold it. I dont think people give the t25 enough credit. Alls you have to do is crank the boost on it and the fact that it does drop off becomes negligible:

Lets say you have it set at 15 and it drops down to 12-13 when you top out in 2nd for example. If you crank it to 18 for example, I was dropping out at the top of gears at around 15ish, and thats with no new FP actuator. So where I drop off at is where you start at. Seems like common sense to me.

Crank it and that fmic is only going to create lag IMO

Very interesting. I really though that stock boost was ~8-9 PSI. Stock is 13 PSI to make 210 HP? That’s kind of disappointing… My friend got 240sx with SR Motor and its 4 Cylinder T25 turbo running stock @ 8 PSI making same HP (180 SX JDM model). I don’t know about 18 PSI but certainly will try 15,depending on what my Boost controller says when I run stock.