o.k. everyone....

problem: my car holds boost to 1.5... every now and then while shifting it may spike to 1.8... but in 2nd 3rd and 4th gear... it tapers down after 5krpm to 1.1-1.2 bar...


the mods:
arc intake
helix dp
perrin tp
hks hi-power canister
greddy type rs bov
greddy upper ic
fuel pump
denso 720 injectors
hks 264/272 cams
dejon tool for boost controller
safc for tuning


now... what should i look at//check//tighten etc. to help my boost woes... the BOV has been set correctly... that is not the problem...

 

3 second bump

 

whoops, read closer. Is the dejontool boost controller manual or electronic?

 

dejon tool for boost controller ( its manual)

 

Has it been more humid than usual when this happens. I notice when its real humid my car tapers about 2/3 psi from where it spikes, but on nice cool nights I hold my boost to redline.

 

no... not humid... regular weather... nothing out of the ordinary

 

We live in so. cali... humidity is like almost non-existant. Just arrid dry heat

 

Well....time to build a boost leak test

http://vfaq.com/mods/ICtester.html

 

i'm losing about 4psi through my curve

 

Yea sounds like a leak..

 

bah! where can i get a A 4 inch long piece of 2.5" O.D. (outside diameter) hose. ... i have everything else..

 

flip where did you tap the line for your dejontool? I hit mine up by the intake manifold and it seemed to hold boost much steadier.

 

Did it start doing this after you installed something, or did it start out of no where.

 

Home depot in the plumbing section. They have small couplers that should do the trick, and some even have clamps on the end already.

 

tapped where towards the front of the valve cover... closer to where the BOV is