sti345

iTrader: (2)

Hi all, what boost should i be getting out of my95 wrx import...Z4 ecu with a mines chip and td05h with a panel filter and 0.6 welding restrictor (pill). iam only getting 0.7, and how can i get more like 1.2ish bar.thanks

dan2926

iTrader: (4)

Standard boost should be 0.9 Bar with a standard Z4 ecu and Tdo5. Fuel cut comes in @ 1.08 Bar.

Im pretty sure the mines ecu should be running higher boost and high fuel cut limit etc.

Not sure what boost it should be running at with the mines i would imagine around 1.1 - 1.2 im sure someone can clarify.

MCB can be fitted but would look at finding why its running low boost.......

shane_evans

iTrader: (1)

Mine is running the same boost at the moment(10psi). I got to play around witht the adjustable actuator and by pass the standard solenoid it start working out the issue.lol

dan2926

iTrader: (4)

Do you guys have de-catted exhausts?

shane_evans

iTrader: (1)

Mine was the same before i decatted it mate. It comes on to boost alot better now.

Glowplug

iTrader: (8)

I think your restrictor is a tad on the small side at 0.6mm, this will restrict you boost.

Have you tried dropping the hose off the bottom of the BCS and seeing what boost you achieve??

Just put a bolt in the end of the pipe you disconnected to stop it sucking any unwanted in.

Pill sizes:

MY93-96 ... 3 port solenoid 2.0mm restrictor fitted into the vent pipe between solenoid lower port and intake

MY97 (Euro) ... 2 port solenoid 1.2mm restrictor fitted between the turbo and the tee piece

MY97 (JDM) ... 2 port solenoid 0.9mm restrictor fitted between the turbo and the tee piece

MY98 (Euro) ... 2 port solenoid 1.2mm restrictor fitted between the turbo and the tee piece

MY98 WRX (JDM) ... 2 port solenoid 0.9mm restrictor fitted between the turbo and the tee piece

MY98 Sti 4 ... 3 port solenoid 1.5mm restrictor fitted between the turbo and the solenoid adjacent to the solenoid top port

MY99 (Euro) ... 2 port solenoid 1.2mm restrictor fitted between the turbo and the tee piece

MY99 (JDM) ... 2 port solenoid 0.9mm restrictor fitted between the turbo and the tee piece

MY00 (Euro) ... 2 port solenoid 1.2mm restrictor fitted between the turbo and the tee piece

MY00 (JDM) ... 2 port solenoid 0.9mm restrictor fitted between the turbo and the tee piece

MY01-05 (Euro) ... 2 port solenoid 1.2mm restrictor fitted between the turbo and the tee piece

MY01-05 STi ... 2 port solenoid 0.9mm restrictor fitted between the turbo and the tee piece

MY06/MY07 both WRX and Sti 2 port solenoid 0.9mm restrictor between turbo and tee piece

sti345

iTrader: (2)

yes only just fitted a de-cat down pipe with a fujitsubo system. when you say buy pass the solenoid which pipes do we block off also which way do i go for the adjustable actuator ? thanks

joz8968

iTrader: (13)

Around 0.9-1.0 bar.

If you wan't more then you can get a replacement chip from Major Sarcasm that ups boost to 1.1bar and should give you c.280+, if decated/panel filter/97 RON.

sti345

iTrader: (2)

b13 bat .... hello again... 2mm thats a big jumb will try that in a bit.

sti345

iTrader: (2)

just dropped the pipe off and blocked both up and at 6k revs in 2nd only getting 0.5bar now...so shall put it all back and up the size of the pill.thanks

Glowplug

iTrader: (8)

Afternoon

Glowplug

iTrader: (8)

Blocked both off?????

Leave the bottom port of the BCS to VTA.

Just block the pipe that goes to the resonator box.

sti345

iTrader: (2)

sorry mate but what is (VTA) something like ? thin air ....lol

burbling1

iTrader: (1)

vent to atmospere

Glowplug

iTrader: (8)

Yeah some thing like.

Vent To Atmosphere.

sti345

iTrader: (2)

lol...omfg just done it and going passed 1.0 bar then fuel cut and very loud bang out the rear end and iam fu(king loving the sound... right how do i get round fuel cut can i do this via evoscan?

Glowplug

iTrader: (8)

Trial and error with the restrictor size will sort it!

SinghSuperStud

iTrader: (2)

You can adjust the Fuel cutoff table values using an ECU ROM editing tool like Romraider. You'll need a Tactrix cable (ODB2)

my94wrx

iTrader: (4)

not on a early classic you cant.

Glowplug

iTrader: (8)

You'll need a lot more than that SuperStud!!!

sti345

iTrader: (2)

put a 2mm pill in last night and only got 0.7bar...so will have to get a bigger pill or drill out the one i got will have a go tonight and update later.

bigsinky

new thread in about a month "engine let go, what happened?"

sti345

iTrader: (2)

you talking from experience....lol

Glowplug

iTrader: (8)

2mm should be giving you at least 0.9bar (standard Z4).

joz8968

iTrader: (13)

sti345, make sure your BCS is plumbed in correctly first (if it isn't already):-

marcevs72

iTrader: (5)

my 93 wrx import was running a mines ecu and was 1.1 bar.have standard z4 and getting 0.9bar now.plus took forge manual boost controller off and put new bcs pipework on and used a mig welding tip drilled out to 2mm on advice from b13 bat and car so much better and smoother!!!!

Glowplug

iTrader: (8)

Pleased i could be of assistance.

bigsinky

bit of advice from someone who has been there with his 95 wrx. you can take it or leave it. a manual boost controller like a "dawes device" or similar will give you more bang for your buck no question. standard boost on these engines is about 0.8 bar.

if you are not going to remap your car then be careful what fuel you use. you need to make sure the air fuel ratio is spot on as well as injector duty cycle. turning up the boost can lead to major catastrophic failure of an engine. if you get this wrong and your engine runs lean you stand a major change of engine failure due to detonation (pinking). an afr gauge or wideband lamba will go some way to preventing this. the 380cc injectors will be at max duty cycle so you may want to purchase an adjustable fuel pressure regulator to give you some headroom in that area.

your car is 16 years old. tired old rods, pistons, big end bearings, oil pump and modine. you are asking an engine to run 35 - 50% more boost as well as placing more strain on other components (gearbox, driveshafts etc). a lot of people do this with no ill effects (i did so myself for over a year with those other bits n pieces above fitted), but there is no substitute for a remap by someone who knows what they are doing. the Mines ECU is a japanese unit that is usually pretty aggressively mapped out of the box (fuelling and ignition advance) for 100RON fuel.

Just be careful is all i am saying. go in with your eyes open. i personally would be either fitting the small items above for safety or else saving for an engine rebuild. Only a matter of time fella.

sti345

iTrader: (2)

i drilled out a couple of welding tips from 2mm up to 4mm and the 3.5mm gave me 0.9bar which as above i will stick to untill i get it mapped..

Glowplug

iTrader: (8)

Result!