t25 fully boosted misconception
 

ok, before I went turbo, I always thought that a t25 would be fully boosted at like 2800-3000 rpms, at least thats what everyone else says, but I have a t25 with 2.5" intercooling piping, and I START boosting at 2800-3000rpms, but I don't reach my 9 psi mark until like 5800-6000rpms, is that the same for everyone else?

Re:t25 fully boosted misconception
 

That doesn't sound right. I build boost at about 2900 and am full spool at 3400ish. I am running 8.5 psi on a Saab T348/42 which is similar in size to yours.

Re:t25 fully boosted misconception
 

im sorry pa2play but I dont remember what kind of an exhaust you have?

If you still have a stock exhaust, try running it without your cat and your exhaust. My setup was doing exactly what yours was doing before I dropped the exhaust and found out it was too small for turbo. Mine would start boosting about 3-4k but never reached full boost until 7-8k. But it reaches full boost by 4k. I know we have different engines but try dropping the exhaust and running it open downpipe and see if there is a difference...

Re:t25 fully boosted misconception
 

could you have an exhaust leak before the turbo?

Re:t25 fully boosted misconception
 

I'm running the greddy sp exhaust 2 1/4" with a high flow cat, which I'm taking out right now ;), as far as the exhaust leak b/f the turbo, on my hm manifold, there is the SMALLEST (I mean minsquel) hole on the back, like a pin hole, and the only reason I havn't fixed it is because I would have to take EVERYthing off to get to it.

Re:t25 fully boosted misconception
 

You could also try an MBC. That may help.

Re:t25 fully boosted misconception
 

WOW!Im running the same turbo and I dont see full boost till about4500 rpm or so.

And for the record a saab t3 is a little bigger than a t25.

Re:t25 fully boosted misconception
 

Uhm... if you have an exhaust leak... that could be it if your boost lag still persist after taking off the exhaust.

Re:t25 fully boosted misconception
 

check your wastegate too. If the flap isnt totally sealing, it will cause the turbo to spool later than it should.

Re:t25 fully boosted misconception
 

I'm in full boost basically whenever I am at WOT. on say a third gear run, I'll punch it at 2k and be fully boosted at 2.3k, and the boost will last till redline.