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R34 (Neo Straight 6) Power FC Question

Bass Junky

By Bass Junky,
in Engines & Forced Induction

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Bass Junky Grand Master

Bass Junky

Posted
Posted

Hey Ppls,

Previously I thought the extra throttle body type device was a traction control thing which shut when wheelspin was evident.

I have since been told that this is actually a Variable Intake Flow thingo which acts to increase airflow speed at low rpm by closing like a normal throttle body, and then opening up at high rpm to give bulk airflow.

Now, PowerFCs are suppose to control all features of the engine management, and I would assume that this is a very important part of the Neo 6 engine.

To those who know, does the R-34 PowerFC allow you to control the activity of this throttle body device........??

I would assume that you could adjust this similar to the way you can with the NVCS.

Having said that though, it might have a link to TPS in order to give the best results depending on a lot of other variables......

Anybody with any experience??

Cheers

BASS OUT

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666DAN Grand Master

666DAN

Posted
Posted

Are you talking about the bit that sits across the inside of the plenum? it's open at low revs, then closes at high revs...speeds up the flow of air at high RPM. If you disconnect it you'll notice the car runs like a dog from about 3200-5000ish,then picks up in the last bit of the range.

Bass Junky Grand Master

Bass Junky

Posted
  • Author
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Yep, that's the bit.

Any definent answers??

when I disconnected the plug to it last night, the Engine Warning light came and on the Slip/TCS off light lit up and I took it for a drive.

I didn't really notice a lot of difference but the car was cold and I couldn't really give it a good thrashing.

Guest RedLineGTR

Guest RedLineGTR

Posted
Posted

The thing that is in front of the throttle body, is for the Traction Control System :D its what limits your revs when u are wheels spinning from the line, hence if you try to launch with the TCS on then you bog down quite bad. Hope it answers you question.

Guest RedLineGTR

Guest RedLineGTR

Posted
Posted

The Power Fc will control everything the same as in other skylines (in one way or another) the Neo engine is tuned for more power (more R&D) over the past models. The TCS Has a Seperate ECU for what it does and u cant change any items of how it behaves with the power fc nor do i know any companys that have Tuned it in one way or another.

Guest RedLineGTR

Guest RedLineGTR

Posted
Posted

I hope this is what u mean by your question. When the TCS is activated it is activated and if the car starts to slip highly then it kicks in just like i throttle body, like if you are on the pedal to the floor the TCS can ajust its throttle and limit your revs. If the system is off then the air flows how its meant to without any interuption.

Bass Junky Grand Master

Bass Junky

Posted
  • Author
Posted

My experience with the traction control is as follows.

Going around slight corners and nailing it, the car will pull lose power and then accelerate once grip is gained again.

But in the wet the car will drop spark and the engine will 'strobe' (for want of a better word) for a second and then accelerate, at which point traction will be lost again, and then it will strobe again.

I think maybe in moderate losses of traction, the blade might close, butin big ones it drops sparky and really pulles the reigns in.

If it only works for traction control, I wonder it there is any merit in using it as a variable intake diameter type device????

Abo Bob Grand Master

Abo Bob

Posted
Posted

What makes you think it "drops sparky"? It just closes the valve completely starving the engine of air and probably cuts the fuel at the same time. If you cut spark it would backfire when you gave it back.

At it's most basic it just cuts power so you can get traction back and if you keep your foot down then it will spin the wheels again, thus restarting the whole process.

Bass Junky Grand Master

Bass Junky

Posted
  • Author
Posted

Abo Bob.

The sound it makes it identical to the sound that my car makes when misfiring on plugs that haven't been gapped properly.

That's why i made the assumption.

But I have been wrong before!!

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