fd3s7007

tried search. do i only need the solenoid or do i also need the boost sensor? I plan to run my sequentials.TIA

desmond

i think it comes with a map sensor as well as what you mentioned.
bascially everything the avcr comes with expcept for the headunit

rotorbrain

ive often heard that the power fc boost control kit (which is what i have) is NOT the one you want for sequential. evidently, the spiking that comes into play can cause problems with fuel cut.

i think youd be better off finding a profec b.

NewbernD

iTrader: (1)

I still don't understand what's wrong with the stock turbo control system for the stock sequential turbos.. at least when you have a power fc..

fd3s7007

i plan to go single soon so thats why i'm asking. Like to have a feel for the boost control system before i do the single conversion.

so can i sfely say i need map sensor as well as solenoid? TIA

TailHappy

Like desmond said, it comes with a MAP sensor anyway. But you only need the MAP sensor if you plan on boosting over 15-16psi (which isn't smart with stock twins anyway). As opposed to my situation where I only wanted the MAP sensor and NOT the solenoid. Too bad I already bought it or we could work a deal....

And to add, the kit apparently has a harness so you can use both map sensors simultaneously. One reads atmospheric and one reads boost, to apparently give you better boost control. From what I hear it doesn't make much difference though.

Fish

These kits are CRAP!!! I sadly bought one.

It does not control boost that well. You would be better off buying say either the Profeb B or the Turbosmart eBoost units.

The only useful part is the map sensor.

Fish

NewbernD

iTrader: (1)

Fish.. I don' t know what kind of problems you have had but mine controls boost just fine. The only problems I've heard of were people that wern't running large enough diameter line to the solenoid and wastegate. I can run anywhere from 10 lbs (wastegate spring) and up and it is very steady. I think it couild probably do a better job of holding the gate shut until closer to target boost but overall I think it does a good job.

fd3s7007

so meaning if i want to boost conservatively 15-16 psi i just get the solenoid? How do i wire it to the pfc? As i recall there are only 2 wires on the solenoid. please assist. TIA

NewbernD

iTrader: (1)

You can just get the avc-r solenoid to control boost. That's what is supplied in the boost kit. In the kit it comes with a plug to attach to the car's harness. I don't know how it comes if you just get the solenoid. In any event, it's just 2 wires.

Honestly, I wouldn't screw with it until you go single though. Get your car to run well on just the wastegate spring first and then worry about upping the boost.

TailHappy

OK, I guess I'm getting confused on what you're trying to do. The stock map sensor is good to 1 bar, which is roughly 16psi. But you don't want to run at the limit so that the sensor can still read spikes and adjust fuel accordingly. If you plan on running more boost than that, you'll need the 3-bar MAP sensor (which you can get separately). The PFC alone will control your boost, you don't need the solenoid. AFAIK, the solenoid only comes into effect if you switch to a single. I just decided to use a ProfecB so I can't help much there.

books

iTrader: (8)

I believe you could use the solenoid if you were going to run the twins nonsequentially.
I bought the solenoid itself in an attempt to control boost on a single setup.

The PFC and the solenoid would not maintain stable boost, it would oscillate.
However there is another individual who ran an Apexi RX6 using the solenoid and controlled boost just fine.

I did experiment quite a bit with the boost and duty cycle settings. I probably datalogged at least 20 runs.

I also posted a couple of graphs comparing the Profec Spec II to the PFC with the solenoid in the 3rd gen section.