Hi,


I'm attempting to fit a Prodrive Boost solenoid on my 03 STi,


I'm a little confused as to how the lines go,the stock solenoid links both the wastegate actuator and the compressor outlet and then connects to the solenoid,does the 3-port have a separate line straight to the compressor outlet? getting rid of the restricter pill?

Thanks,Ben

 

Yes, you get rid of the restrictor and T-piece.

Take one length of pipe from the compressor bleed outlet on the turbo to the metal inlet on the back of the solenoid - underneath the electrical connector.

Second run goes from the vertical outlet on the solenoid to the wastegate actuator.

The "front" outlet on the solenoid plumbs into the return on the turbo inlet pipe.

Presumably you already know this, but just in case, do not under any circumstances drive your car under boost with the solenoid fitted, until it has been remapped. Two-port friendly wastegate duty table will make it overboost bigtime.

 

Hey,

yeah I managed to figure it out,I didn't realize the connectors on the new solenoid are smaller than the stock ones so i need to get some hose tomorrow and fit it again.

any input on what hose to get?

I'm fitting a WR1 ecu so hopefully I won;t need a re map

thanks for the help,

 

Good quality hardwall vacuum or fuel pipe with 1/8 inch or so bore. If you want to do it really neat and get the pipe routing spot on, get part number 807304971 from your Subaru dealer.

This is a hard pipe with a moulded right-angle in one end of it, and a bore that's just the right size to get a tight fit on the grey solenoid ports. Cut it in two and you can use it as a pair of tails. The right angle will make the pipe run off the top port nice and neat.

You'll need slightly larger tube - 5mm bore - to connect to the "rear" spigot. You'll get better boost control by using a relatively small piece of this, and connecting to some smaller stuff for the run to the compressor nipple.

I could be wrong, but I believe the WR1 uses the standard two port boost control setup. If this is the case, you will need to remap it to tune it into the Pierburg/Prodrive three port. Otherwise, as mentioned earlier, overboost and fuel cut city.

 

hey,

I just done the job using some hose I had lying around,it's not perfect but it does the job untill I can get some good quallity stuff.

just been and drove the car and it seems a bit quicker,it noticably holds boost longer...I'm still using the stock exhaust at the moment too,got the sports cat to fit saturday.

thanks,Ben

 

LISTEN to what is being said. The re-map is necessary or you will be getting a engine rebuild. I had my 3 port solenoid fitted during a mapping session, about a third of the time mapping was getting the solenoid setup. You comment about it boosting longer but what YOU don't hear or see is the det that is happening which will mess your engine up.

 

Dude, what's the rush? You may as well sit back and do the job once, and do it properly - although it's a moot point now I guess seeing as you've already gone ahead.

Yeah, I bet it does. I don't know how much leeway the newage ECUs have to learn and trim the WG duty map, but, unless you are monitoring boost and det like a hawk, you may be causing damage to your engine every time you tread on it.

The Prodrive solenoid, in my experience, needs a good 20% less duty cycle to hit the same boost level than the two port bleedoff setup. Or, looking at it the other way, if you run the Prodrive solenoid on a two port WG map, you'll be well into overboost - unless, as mentioned, the ECU can effectively relearn its wastegate control dynamics on the fly.

If you are monitoring and know everything is fine, that's one thing. However, if you aren't, it sounds like you're cooking up a recipe that has plenty of "end in tears" potential.

 

I thought the restrictor pill went in the pipe to the inlet hose? Is it not needed?

 

I know I don't need a re map,thanks for the help figuring out the routing.

 

Scroll up and read the last sentence of post #4. I made clear at the outset that I wasn't sure which solenoid the WR1 uses, and also said that if you knew better, that was cool with me.

I wrote the post the way I did to save you unwittingly subjecting yourself to one of the engine damage sob stories we see here quite regularly. Much better that you know to proceed with caution where necessary than to see you back here in a week or two needing prices on a rebuild.

I wasn't "telling" you anything, I was offering you advice, for which you have been charged precisely nothing. If you get arsey about it after the fact, you may just find that the next time you need help, folk who've read this thread might think twice about answering. As the saying goes, you reap what you sow. Still, if you know all the answers already, I trust we'll be hearing no more from you?

 

Hey,

my above post wasnt really aimed at you,more the guy getting stroppy with me because he thinks he knows I need a re map.

Thanks,

 

Same point applies fella. Giving 360Ste 'tude for relating his experience and suggesting you proceed with caution seems very much a case of biting the hand that feeds. Not the way to win friends and influence people.

 

I know for sure that the WR1 used the 3 Port boost solenoid, so you'll be ok. As long as its the Subaru 3 port, I've seen different 3 ports take different WGDC values.

 

no Splitpin,

360ste was trying to ridicule me,making me look stupid because I didn't think I needed a re map.

I won't accept advice from anybody that makes me to look stupid,especially if that advice is also wrong.

yeah I have the Prodrive 3-port,do you know what the WR1's run boost wise?

Thanks,

 

Don't know for sure, but an educated guess would say around 19-20PSI.