External wg high rpm boost loss

[YaroGlanzo]

Hi guys,
last days i face a problem with my boost.

I have external-yzed :haha: my 4efte with a 38mm wg which includes a spring for 10psi and a nice screamer pipe :rockon:

So...i should have 10psi in full throttle.
Here my problem begins. When i full throttle @4000rpm i have 10psi but after 5.500-6.000rpm my boost goes away and @7000rpm i only have 6,5-7psi

How can this happen? I have connected the external wastegate directly with the turbocharger (a hybrid ct9 now, same thing happens with my stock ct9 installed).

Any advice? Thanks in advance !

Cheers

 

[omikron]

what displacement what c/r?, whats going on fmic or tmic wise?

 

[elison]

It is common for boost drop for like 1 psi on a spring gate. but 3 psi for me it seems you could have a leak somewhere. Are you pressuring the gate from the compressor housing or from the intake manifold?? I would start thinking of a EBC. That way you could get the most out of your externalized setup.

 

[YaroGlanzo]

So i should try a leak test. Ok.
I will try it and i'll keep you informed! Thanks!

@omikron: 1347cc, 8,6c/r. fmic installed. Thanks