Ko3s boost issues

[joeg40]

Hi there guy, i have recently bought an ibiza and i havin some doubts on th boost presure, i previously owned 2 cupras and one with a ko3s turbo. The boost was very strong and pulled hard ll the way through the revs.
Today i experimented with the boost and found that at the lower revs, about 3k, the boost was at 20psi but as the revs grew, by the time it was at 5500rpm the boost dropped to 12psi and you could really feel it.
My mods are ko3s turbo, bf turbo back, forge front mount plus all the other usual stuff!!!lol

Any thoughts would be greatly appreciated!!
Joe

 

[turbo009]

vag com your friend

 

[R100XET]

mine just boosts at 20psi then drops and holds at 15psi but somtimes in boosts up to 20psi + and losses power and starts missing any know what could be the problem?

 

[joeg40]

Had it hooked up to vag com, only fault was a warm air induction hose split.

 

[joeg40]

sorry warm air pump hose, think its the pipe that pumps warm air into engine to warm up the car when its firt started from cold. Couldnt see or hear a split in pipe. Boost still the same. could this be caused by split hose??

 

[PhilW]

12psi in hot weather @ 5500rpm sounds about right to me.

If youre that worried just log it to see how its doing.

 

[joeg40]

what do you mean by log it?

 

[Big_daddy]

what do you mean by log it?

do power run

 

[PhilW]

With a laptop with vag com on it, preferably by someone who knows how to use it.

 

[joeg40]

had it on vag com and nothing came up, could it be a leak or would this have come up on vag com. how can you test for boost leaks??