boost question

[Zak Mach]

im currently boosting at 15psi .. if i add an boost controller how much more can i crank it up to??

current mods:

-catback tanabe exhaust
-blitz bov
-injen intake
-ngk sparks with nology wires

[Travis Merrick]

15psi, I wouldnt go any higher, fuel problems you will run into i think.

[Aaron Moore]

How are you boosting at 15psi without a boost controller?  After 15psi is when things start to get expensive.  You'll need to look into proper fuel management.

Remember, there is no exact # of pounds that you can run.  To know for sure, you have to have a logger (2G guys watch timing and knock I believe):wink:

[Zak Mach]

sorry im kinda new to all this turbo stuff.. maybe im reading my boost gauge wrong...

im looking at my boost gauge as soon as i hit redline.. no matter ho hard i rev, my boost needle will go up to 15psi.. am i reading it right???

maybe the guy before my dids some upgrades i didnt know about.. hope this is the case

the reason im asking this is because my friend had a spyder gst & his boost reads at 13psi

[Graeme Shaw]

13~15 PSi sounds right for a 2G, I think...the 2G engines were not quite as efficient with boost as ours (the 1Gs) were, although I envy the 6-bolts among us.  I think stock is around 14 PSI, so small spikes here and there are to be expected, right?

[John Hartman]

without upgrading your fuel pump, and turbo don't go any higher.  I don't own a 2g, but I've heard alot of 2g guys talk about this at other forums.

The turbo itself is just pushing hot air at pressures over that.  It was designed to spool quickly but it doesn't have the potential of a larger turbo.

It is pretty cheap to put on a used 14b tho.

[Chao C. Yin]

Stock 2G runs 14.5 psi stock, usually after a few years the maximum boost will drop due to BOV leak.

If you add a boost controller to that stock T25 you can only crank up boost before 5K rpm.  After that the turbo runs out of breath and the boost falls back to stock/near stock at redline.

[Matthew Lemon]

the t25 wont like being above 16psi either very inefficiant plus it will blow out faster get a 20g

[Jacky Ng]

When I was stock I was running about 12 psi with spikes to 14-15.

[Jacky Ng]

If you only look when it's at redline, maybe it just creeps up to 15 since you got an exhaust?  Usually the boost drops back to about 12-13 after 5000rpm.