I would prefer the equivalent of maybe 290-300 hp at the crank (~240 whp) at no more than 15-16 psi with quick spool up as an important factor.

Stick with the stock turbo then. It is capable of making that power. If you MUST upgrade, go with a Big 28.

 

Thanks. I was also thinking along that line. That's why I don't want to "upgrade". I'm looking at what to get after the T25 is dead. By the way the turbo has been feeling recently, there's not too much life left in it. So 1 vote for another T25.

 

Thanks. I was also thinking along that line. That's why I don't want to "upgrade". I'm looking at what to get after the T25 is dead. By the way the turbo has been feeling recently, there's not too much life left in it. So 1 vote for another T25.

I say get another T25 until you can get the supporting mods for the big 28 The T-2small can be found pretty cheap

 

14b?

 

Thanks for the few replies. I forgot to mention the 14b, but I was considering that too.

To better summarize what I'm trying to ask. If the T25 were to die, would it not be a good idea to replace it with another turbo such as the T28, big T28, 14b, small 16g? With stock boost, right now I'm reading 15 psi to about 5.5K then down to 11 by redline, which of course is normal for the t25. I was thinking a small 16g or a super 60 might be a better idea because those turbos wouldn't be as stressed as the stock one to make the same boost so it should be more reliable and since it is more efficient at 15 psi it would make a little more power, too.

I'm not too familiar, but is the stock fuel system on the 2nd gens already that close to being maxed out at stock boost (15psi) with the t25 that it couldn't handle a slightly more efficient turbo like the super 60, 14b or small 16g at the same boost?

Is there anyone out there running another such turbo at stock boost without running bigger injectors and using an AFC? I was led to believe that was possible without any problems, is this correct? I appreciate any info. Thanks guys!

 

any inputs about the t3/t4 turbo for the 2g

 

HKS GT series turbos have been proven to work and not just speculated about. They aren't as cheap as some of the others but at least you know it will work, its ball bearing, has decades of backing and spools very fast. Hell you could likely get a turbo custom built somewhere like NZ or Australia for around $600. Personally though I went with the HKS GT turbo.

 

Im a newbie too:

Q. I have a 98 GSX and want KILLER mid -top end; what turbo KIT <-----rem, Im a newbie and this will be my fiirst time working on ANY car

thanks 4banger spankers

 

another vote for a 14b

 

Just wanted to point out that 15psi on the t-25 is not the same as 15psi on a larger turbo. You will either have to run LOWER boost (if you can), or get some kind of fuel control along with larger injectors to run 15psi on a larger turbo (larger than small turbos like 16g's/T28's). Then after you get the fuel mods you need to run 15psi correctly on a larger turbo, you will end up running 19-23psi anyway. THere is never enough. What does reliability mean?

 

If your goal is 250hp, then there is no need to upgrade at all. The T25 will make that HP without a problem. If you buy a 14B, you also need an install kit. Used T25's go for under $200 anyways, so it wouldn't make sense to get anything else.

 

Ive seen use T25's for $50 on the trader.

 

Ive seen use T25's for $50 on the trader.

I thought the t25 was only good for about 250 crank hp until it runs out of steam.

 

if you've got a junkyard nearby, and with some carefull shopping on your part... a 14b swap can be just as cheap as a t25 replacement. While it's not the greatest thing since chopped BBQ, the 14b will damn sure make you happier than the t25.

 

A 14b is a much better choice than a t25, just look at the cfm output. I belive the t25 is 260cfm and the 14b is 405cfm at the same boost level which is 16psi I think.

 

Very interesting.

But to get about 280-290 hp crank, can't you just bolt on a T28 at stock boost or a 14b with nothing more than maybe a fuel pump? I though the stock fuel system was not really maxed out in stock form. Or is 290 hp crank kind of pushing it on just a fuel pump with a T28/14b/small 16g ?

 

290 crank hp is not too far out there. The stock fuel system is good till about 16-17psi max and then your pushing it. With a pump and rewire you can run 290chp without a problem.