New S60 turbo CRAZY lag, normal? Break in?!?

[NoDestiny]

What base timing you running? I hate to keep bugging you guys on these questions, but after investing the chunk of money and all this time so far, I hate the way this thing runs... makes me (gasp!) miss the old turbo!

I will be getting the new cal, 3bar map, and +40% injectors from FWD-P soon... but I don't want to get those things and find more disappointment.

[The Pope]

Quote:

Originally Posted by NoDestiny What base timing you running? I hate to keep bugging you guys on these questions, but after investing the chunk of money and all this time so far, I hate the way this thing runs... makes me (gasp!) miss the old turbo! I will be getting the new cal, 3bar map, and +40% injectors from FWD-P soon... but I don't want to get those things and find more disappointment.

compression, static that is spools your turbo. Greatly effects the engines power without a turbo and how responsive it is. You add a thinker than stock MP gasket and a G head to a 2.5 and the compression drops a ton. That hurts spool up. Then a mini van type factory computer is very soft on timing. The new cal gives a lot more timing for the g head and for performance reasons. consider FWD .051 Cometic head gasket, it will raise compression a hair.

As far as disappointment it'll most likely finally run right with the new computer. The thing is just way out of tune. lots of fuel at idle makes me think your engine doesn't have an vac at idle either. Consider a wideband and an AFPR. A pig rich engine won't spool a turbo because it isn't making the power it should, before boost and during.

[NoDestiny]

Got a zeitronix wideband right now. Watching it, it slowly goes from something liek 11~:1 to peaking at 12.1:1 (would have to pull up my laptop to check for sure), keeping in 11:1-11.5:1 most of the way. But it definitely runs rich right off the bat!

[GLHNSLHT2]

I run 12 degrees of timing, just like stock. What is the a/f at idle and cruise?

[NoDestiny]

14.7... but a few times it seemed it ran rich for a while... like after a run... i would have to go back and check.

[The Pope]

Quote:

Originally Posted by NoDestiny 14.7... but a few times it seemed it ran rich for a while... like after a run... i would have to go back and check.

What is intresting is that you may see the right ratio at idle, but the computers "bounce" on the AF gauge changes. GLH can chime on this but I believe if the "bounce" is really slow that means the idle is rich? I remember tuning mine for a nice quik "bounce" at idle. As for the fuel in boost your too rich. I would take down the fuel pressure till your solid in the 12:1s, then when you lean it a few PSI of fuel for boost go back and see how much the idle leaned out with it.

[NoDestiny]

Cool, ill have to do that after I get my new setup, of course. Ill be getting the Stage 5 FWD computer, +40% injectors and 3-bar on this paycheck. Next ill get a new fuel pump and adjustable FPR.

[Shadow]

Quote:

Originally Posted by NoDestiny Something I forgot to mention yesterday: as I drive it, it goes from 5psi-13psi in scale to 3-6K RPM... when it shifts, it drops both RPMs and down to about 7psi boost and climbs again...

Starting to sound like your w/g is stuck partially open. That, or your boost controller sucks! If your brave, unplug your w/g vac/boost hose. plug the hose side and go for a ride. BE PREPARED TO GET OFF the throttle as soon as you reach your target boost! It should spool like mad, 2500-3000. DO NOT keep your foot in it with the w/g unplugged! As this could take you to 30psi boost (or the moon) which ever comes first! If you try this I accept no responsability for you blowing anything up, if your not carefull!

[NoDestiny]

Yeah, I was thinking of ditching the boost controller to see what it does (though, it is a brand new TurboXS high performance version), but just to see what the boost does.

What could cause my wastegate to stick though? When I installed it, I adjusted the arm so I had to pull just slightly on the arm to close the wastegate properly, to make sure there was good tension on it.

[crazymadbastard]

do you have a small orifice to leak out air between the controller and the wg actuator?

[Shadow]

Quote:

Originally Posted by crazymadbastard do you have a small orifice to leak out air between the controller and the wg actuator?

X2, if you don't, it'll boost good once, then be LAGGY as HELL! On your other Q. You said the coolant line was almost touching the actuator arm. If it wedges against the line it could cause you trouble.

[GLHNSLHT2]

Quote:

Originally Posted by The Pope What is intresting is that you may see the right ratio at idle, but the computers "bounce" on the AF gauge changes. GLH can chime on this but I believe if the "bounce" is really slow that means the idle is rich? I remember tuning mine for a nice quik "bounce" at idle. As for the fuel in boost your too rich. I would take down the fuel pressure till your solid in the 12:1s, then when you lean it a few PSI of fuel for boost go back and see how much the idle leaned out with it.

A very slow bounce usually means the O2 is on it's way out, But if if it's ok on the wideband i'd say you're fine.

[The Pope]

Stranger things can happen. Some how I put a G casting, a T2 Garret and a 767 cam in a 89 turbo mini. Drove it 2 weeks and lost boost. Took it appart and had a bolt lodged in the turbine on the exhaust manifold side.

The XS MBC I've seen are a bleed type, not a direct like a G valve. May want to dump that thing.

[median]

check for a boost leak somewhere from turbo compressor side to intake manifold

[NoDestiny]

OK so I finally got around to leak testing and the like.

Intake side: sealed
Exhaust side: Bad leak on down pipe (fixed... mostly)

But thats about it.

Though something to note: The actuator arm IS rubbing slighly against the water angle part of the turbo. I don't think I can tighten the water end any more as it was already a VERY tight fit. Should I get some custom work done on the arm? Maybe a bracket that sits up 1/4" higher? As the pressure released from the test, it jerked coming back...

Finally: Got a custom tune cal, injectors, and 3 bar map on the way!