Hi-Boost, Low-Boost setup

Ok acording to the FSM it is the Pressure Regulator Control Selenoid Valve.
(This is starting to seem dodgy and I am sure a few people will have something to say about this, hey Phinx?)
Ok on my car this is connected to the managment and controlls the boost. From Hi to Low, with the so mentioned switch, any way mine is connected up as follows.

Top connector goes to just after turbo on hot boost pipe.
Middel conector goes to the wastegate canister.
Bottom Connector on mine is off. (assuming this goes the the airbox) as this will just bleed off excess air.

Hope this helps. I would actually like to go poking around on someones s14 engine bay to check a few things and compare it to my SR20DET

hey HS,

phinx is incorrect. the s13 ca18det, did have a solenoid to control vacuum. it normally bleeds off into the intake pipe between the AFM and the turbo intake.
the other end of it is usually connected to the FPR via a series of hard pipes and hose connectors that run between the cylinder head and the firewall.

because of the location chosen to source vacuum for the BOV, the original vacuum source for the FPR is no longer being used, and that is why the little pipe between the cylinder head and the firewall is no longer being used.

so your original solenoid is now controlling boost because IT is being controlled by the perfect power unit. the same original solenoid also still has a hose connected with the little connector that is supposed to go into the intake between the AFM and the turbo. so i assume that this must stay there.

as for the way that it is properly setup, it was quite stupid of us not to take note of it, but i forgot about the hi/low setting!!! sorry mate. but i would take note of the way that ero's is setup because his was also done at calibrator. basically it means swopping the middle and rear facing connectors and trying that out.

Exactly!

😉

😂 😂 😂 My Bad 😂 😂 😂

the stock "CA18DET" had no way of measuring Boost to my understanding and also had no control solenoid.

It had a direct feed pipe to the turbo actuator calibrated for Stock boost

Did the management come with a Boost control Solenoid?
Because the S-13 has no unit as stock.

I'm sorry If I am sounding Rude, I mean this with "max" respect but I was not arguing that the "Ca18Det" didn't have a pressure control solenoid. I was Arguing that It didn't have a BOOST control solenoid like the S-14 in Stock Form.

I'm sorry but I never though of the solenoid being used in that way.
As to me it seems hillbilly but who am I to talk

So my bad , I cant really Assist ..

Thanks

VC and I had this conversation last night, the CA does have a control solenoid, but no way to measure boost, so you cant ACCURATELY measure boost and bleed off air to the actuator..

The only way I think the good ol' 'bater would have done is bled off air according to RPM (i.e from spool to boost to dropoff) and just bled less for high boost... Not a good way to do it as boost can be effected and not happen when you expect, anyone else got any ideas?

lol, this is why I said above that this seems dodgy and people are going to respond, I tend to agree tho, somehow it does work, dont ask me how I didnt set it up, but I want to change it for a boost control valve in the near future.

Sokar you are correct with the rpm theory, looking at the maps I noticed that altho I think for the boost control selenoid it would work the same.

ChemCool, are you reading this? This might explain your starting issues, maybe? When the ECU thinks the engine is cold vs hot?

I've been pondering of hooking this up to my Wolf for some time now... maybe this is what I'll do for the weekend... Will need to get hi/low boost setup ready for the Dyno.

Thanks everyone for all the comments and input... Will have a look at it over the weekend and will keep everyone posted on my findings and solutions... or lack thereof...
😂 😂 😂

phinx - you are correct then. the s13 ecu doesnt know what boost its running, as it works without a MAP sensor. but the ECU is mapped with both RPM, TPS, and MAF, so it will have fuel and timing settings based on those three criteria!!!

as for using that solenoid for controlling boost levels, i dont think it is at all hillbilly. every single electronic boost controller on the market uses a solenoid to bleed off air in order to control boost, and people are more than willing to spend over R2500-00 to buy these EBC's. finding a way to do it with the perfect power system is actually very clever. i've been pondering over boost control and my unused solenoid for a very long time now.

what would be of concern to me is whether the perfect power system references the MAP levels or not??? as this might not be as accurate as you want it then. thats the theory...

the reality is that when i drove hotstuff's car before the boost control was disconnected, his boost guage told us that boost rose to the desired level and stuck there like glue, whether you were on high boost or low. so i think it works quite fine. and my butt dyno told me that it was working too!!!

veecee wrote:

phinx - you are correct then. the s13 ecu doesnt know what boost its running, as it works without a MAP sensor. but the ECU is mapped with both RPM, TPS, and MAF, so it will have fuel and timing settings based on those three criteria!!!

as for using that solenoid for controlling boost levels, i dont think it is at all hillbilly. every single electronic boost controller on the market uses a solenoid to bleed off air in order to control boost, and people are more than willing to spend over R2500-00 to buy these EBC's. finding a way to do it with the perfect power system is actually very clever. i've been pondering over boost control and my unused solenoid for a very long time now.

what would be of concern to me is whether the perfect power system references the MAP levels or not??? as this might not be as accurate as you want it then. thats the theory...

the reality is that when i drove hotstuff's car before the boost control was disconnected, his boost guage told us that boost rose to the desired level and stuck there like glue, whether you were on high boost or low. so i think it works quite fine. and my butt dyno told me that it was working too!!!

What do you mean by your concerned theory, Im not understanding your order?
The XMS has maps for Fuel, Ignition, Oxygen, Compenstation(prime, idle, etc), special(injector trim, etc), boost.
Hope this answers your question, if there is anything else ask and I will check for you

Ero_sennin wrote:

if there is anything else ask and I will check for you

anything?

widowmaker wrote:

Ero_sennin wrote:

if there is anything else ask and I will check for you

anything?

I wasn't talking to you, that is dangerous

who's the DQ now?!

it cant be THAT bad man!

while youre thinking about how you've hurt my feelings, here is a picture you can stare at :

🙂

Ero_sennin wrote:

What do you mean by your concerned theory, Im not understanding your order?
The XMS has maps for Fuel, Ignition, Oxygen, Compenstation(prime, idle, etc), special(injector trim, etc), boost.
Hope this answers your question, if there is anything else ask and I will check for you

concerned theory? LOL.

what i meant was that with hotstuff's setup, which as far as i know is a piggyback PP system, i'm not sure that it references boost. so the only way it might "know" what boost it is at, is if it makes assumptions based on values such as MAF, RPM, and TPS.

but again, i'm not sure if it does this or not??? we could solve this if someone can confirm if the PP piggyback systems reference boost.

Vecee: if it is the smt7 then yes, it has boost control

Window: what picture?

dont worry - he's wierd...

or is that wired...

or both???

what you mean what picture? you rabid turtle!