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r33 computer power dip?

deano_33

By deano_33,
in Engines & Forced Induction

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deano_33 Enthusiast

deano_33

Posted
Posted

Hi all, I have just installed a high flowed standard turbo and hybrid super monster i/c to my '94 car, standard computer (had the opportunity to get the turbo now so thought I may aswell put it on, plan to get pfc soon). When i test drive the car at my normal 0.85 bar (avc-r) it pulled well to 4-5 grand then dropped a bit before pulling real hard from 6ish grand to redline. Turning the boost down to 0.75 bar helped, and at 0.7 bar it's barely noticeable, suffice to say this never happened with the standard turbo. I already have a bigger fuel pump and adjustable regulator.

Is this the infamous r33 standard computer power dip? Is so, sh*t it's severe!

Thanks in advance....

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https://www.sau.com.au/forums/topic/38355-r33-computer-power-dip/
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deano_33 Enthusiast

deano_33

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yup.. stock ECU isn't designed for turbo upgrades.. thats what happens generally.  

Didn't whoever installed the turbo tell you this before they put it on?

I purchased the turbo second hand from another customer where I get work done on my car sometimes, apparently this guy ran it on his car with standard ecu for a while before getting pfc aswell, so it thought bugger it, i have the turbo, may aswell put it on. I put it on myself in the garage while i was installing my fmic. I had heard of the standard ecu power dip but never experienced it, so yes i didn't expect the ecu to handle it too well. In a way that's good though, at least I know the turbo is flowing more air at the same boost pressure than the old one.

I was just a bit worried that something wasn't right (esp because I put it on myself), but all seems well, just need the pfc.

madmoomoo Collaborator

madmoomoo

Posted
Posted

just a quick question guys, I plan on going down this same path soon, and hadn't been aware of the computer prob.. what is the "pfc" is it a new chip?

I actually installed a boost controller a week ago, and aside from that it's stock, but i've noticed in the last couple of days, that my car is doing something similar, but dying at about 3-4k then kicking in again... turbo and ic are stock, could this be computer related too? My boost levels haven't changed though... It sounds and feels like something is either slipping or losing power/air then jumping back up.... This only happens after 1st gear. I'm mighty confused... any ideas???

skygt Explorer

skygt

Posted
Posted

Hi guys

Im experiencing the same as madmoomoo at about 3-4k, since a week after my boost controller was installed.Only does it on 12psi everything is stock apart from filter.Never does it in 1st gear.

Please shed some light its really annoying having V8s catching me when i change into 2nd!!!

WiZardOz Collaborator

WiZardOz

Posted
Posted

I have experienced a similar problem with a minor power glitch between 3k - 4k after installing a turbosmart E-boost. It doesn't matter what boost setting I am running (ie. setting 1 is standard boost) the glitch is always there but maybe not as severe as you guys seem to be experiencing. I don't really notice it when on full power (traffic light drags) but noticable when driving normally

If I turn the E-boost off the glitch is gone

I have standard Turbo, FMIC & Mines computer

The next upgrade I am planning is a Power FC and hoping that with proper tuning I can eliminate this glitch

nitemare5 Rising Star

nitemare5

Posted
Posted

any piggyback fuel management hardware can fix this problem... (ie. s-afc or e-manage) but thats more of a bandaid solution. best option would be to go for a whole replacement ecu like a powerfc or wolf3d if you can afford it.

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