What Turbo?

[m@tt untimate STImulation]

what turbo does my classic 1995 impreza have td04 or td05

[HOL]

Is it a UK or Import?

TD05 if an import, otherwise TD04.

I actually have a TD035 (3.5) on my Forester

[m@tt untimate STImulation]

bit trickey ther its an import with a engine transplant from a wrx its not a red top

[20withascooby]

a wrx is a import anyway

[HOL]

You havent actually stated if it is a WRX, or an early UK turbo.

If its a WRX to start with, then it has the 05.

Did you it buy locally? From someone that owned a window blinds installation company?

[m@tt untimate STImulation]

its a td05 h but is it 16 or 18 g im trying to get the right actuator.

[20withascooby]

doubt it would be a 18g they are uprated i belive think i saw u last nyt fella

[m@tt untimate STImulation]

dont think i woz out last nyt woul of driven back from maidstone tho, it defo an td05 ive managed to read it, pain 2 c. is it a 16g then??

[m@tt untimate STImulation]

im 20 aswel mine has a wrx engine with a 2.5 block bolted on, got boos issues atm tho, winding me up

[Big 'D']

im 20 aswel mine has a wrx engine with a 2.5 block bolted on, got boos issues atm tho, winding me up

What are your boost issues mate?

Cheers Iain

[m@tt untimate STImulation]

lumpy boost, i think bif judders, ive been told that it may be the duty (boost) solinoid. its driving me nuts and to couple it off i had a forge actuator fitted and now the fule cut comes in at 5000rpm i just need 2 get a new actuator to sort this as the forge 1 does not allow the waste gate to open properly.

[Big 'D']

lumpy boost, i think bif judders, ive been told that it may be the duty (boost) solinoid. its driving me nuts and to couple it off i had a forge actuator fitted and now the fule cut comes in at 5000rpm i just need 2 get a new actuator to sort this as the forge 1 does not allow the waste gate to open properly.

Ok mate do you know what spring rating the forge actuator is set to? 0.5bar, 0.75bar, 1.0bar?

Is the actuator arm adjusted correctly for the turbo ?, when fitted the arm should just slip over the pin on the wastegate with minimal effort ie you should not have to pull on the watstegate actuator arm to fit it over the pin. The arm should only be adjusted from that point to alter boost characteristics.

If the actuator spring rating is 0.5bar you should have no issues, but you do so i am guessing its a 0.75 unless you have a boost control issue.

To see what is at fault here you can do a few things.

1. If you are running a std 2 port solenoid ( t piece near the turbo with 1 long pipe off the the drivers side wing), remove the pipes from the wastegate and the turbo outlet (thats the 2 small pipes off the t piece) and fit a pipe that is long enough to connect the wastegate to the turbo outlet, this will allow you (if you have a boost gauge) to see what your waste gate spring rate is.

Hopefully it will be rated below 1.0bar.

You should not experience any judder during the test above!!!!

Also have a good look at all of your boost control pipes from the turbo + actuator to the solenoid for leaks as this would cause uncontrolled boost and boost cut.

2. Disconnect the little pipe that you have put in place of the t piece pipes and leave it off, go for a run and monitor your boost, CAUTION during this test drive on a clear road (no cars in front or behind). By leaving the pipe off you will have no boost control if you have a boost gauge fitted get into 3rd gear and go no further than 1 bar if you can, otherwise it will over boost, again you should have no hesitation, judder during this test.

3. Reconnect your 't' piece pipes back to where they were, note when doing this that one of the pipes will have a little restrictor pill (bump) in the pipe, that pipe goes to the turbo outlet side.

To reduce the amount of boost you are getting the size of the hole in the above mentioned restrictor can be increased, this will increase the responce time of your solenoid relative to boost pressure at the turbo causing the wastegate to respond/open sooner. The hole should be increased by 0.1mm increments only, until a stable peak boost is achieved.

By adjusting the size of the restrictor hole you may get better boost control but ultimately a 3 port type solenoid would be much better @ controlling your boost.

Let me know how you get on mate.

Cheers Iain

[Big 'D']

doubt it would be a 18g they are uprated i belive think i saw u last nyt fella

I always thought 16g, 18g, 20g were the turbine casing sizes as in the IHI series turbos use p15 p18 and p20 etc

Might be wrong.

If the above is correct a 16g for example would have better spool characteristics than the 18g or 20g but would lack there gas flow ability at top end, restricing the top end performance and vice versa. ie the 20g would be laggier than the 16 or 18 but when it gets going hold on

Cheers Iain

[m@tt untimate STImulation]

im gunna get another actuator as the bar does need to be pulled to get it on the pin and will not allow much movment so its gotta go i think

[Big 'D']

im gunna get another actuator as the bar does need to be pulled to get it on the pin and will not allow much movment so its gotta go i think

Is it not adjustable?

[m@tt untimate STImulation]

it is ajustable but i think the bar is the wrong size as it will not extend to wher it needs to be, ive ordered a new 1 hot it works