Apexi intake = overboost????
03-11-07, 04:40 PM
#51
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Sorry, I'm just trying to understand, if I have a dp, cat-less mid pipe, an rb cat back, in my case HKS intakes, stock ECU and on top of this a mild/street port, an electronic boost controller won't help with controlling boost spikes? Am I getting this right? I'll need something like PFC? or will I need to port the waste gate and run a boost controller.
03-11-07, 06:34 PM
#52
Originally Posted by ghost-rider
Sorry, I'm just trying to understand, if I have a dp, cat-less mid pipe, an rb cat back, in my case HKS intakes, stock ECU and on top of this a mild/street port, an electronic boost controller won't help with controlling boost spikes? Am I getting this right? I'll need something like PFC? or will I need to port the waste gate and run a boost controller.
03-11-07, 09:56 PM
#53
Originally Posted by Wompa164
Technically that's not true. Boost controllers operate on the basis of 'tricking' the wastegate source pressure into thinking it's lower than it actually is by bleeding off pressure, keeping the wastegate closed longer and allowing higher boost pressure to build up.
03-12-07, 01:25 AM
#54
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Originally Posted by dontlift
The boost controller or a PFC can control boost spikes; porting the waste gate will limit the boost creep you'd get with that setup. A boost controller can not solve boost creep.
03-12-07, 01:44 AM
#55
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Someone back in the mix (page 2?, anyway...) stated that you need the add-on module to control boost with the PFC. Not sure if that was clarified, but just in case - this is incorrect. The module is only required if you have a high-boost application (typically: a single turbo). It's fine for what 99% of us do with the OEM twins.
I have a 321rwhp sequential twin set-up using PFC for tune and control - and I have switchable high (0.8bar) / low (0.7bar) settings which have been rock-solid, even in 0-degree weather.
My tuner (one of the best in Japan) laughed when I wanted to use the profec B II (which was already installed) - he told me not to waste my time, and that the PFC was all I needed. In saying this, his workshop promotes Trust gear - so he wasn't trying to sell me on the PFC (which, in any case, I had purchased elsewhere, and was already installed).
PFC = thumbs up from me.
I have a 321rwhp sequential twin set-up using PFC for tune and control - and I have switchable high (0.8bar) / low (0.7bar) settings which have been rock-solid, even in 0-degree weather.
My tuner (one of the best in Japan) laughed when I wanted to use the profec B II (which was already installed) - he told me not to waste my time, and that the PFC was all I needed. In saying this, his workshop promotes Trust gear - so he wasn't trying to sell me on the PFC (which, in any case, I had purchased elsewhere, and was already installed).
PFC = thumbs up from me.
