st215w/3sgte boost increase over factory

[blitza]

So I've spent all evenin searching, and failed to find the answer, but have read some quite funny posts.

What do I need to do to my boost lines (sense lines) to enable higher boost.

When I brought this car it ran 23psi, had a blitz compressor and ecu.
Some time later it broke a ring land, rebuild added eagle rods and wiseco pistons, which cracked and dropped a skirt 80000km later (after reverting to factory boost), which saw mahle pistons and a fmic (which I regret).
Now I'd quite like to run big boost again just for the occasional kane, or big surge in second as the auto won't handle big loads once locked up.

When I reverted to factory boost I removed a plug from one of the boost sense lines but can't remember which one. (it would have been a while ago, must check the dead 3s register...)

5bob, love your work.

[fivebob]

This vacuum diagram my (or may not) help.


Depending on how you control the boost you would normally insert a boost controller in the line from the turbo to the wastegate acutator and block the line coming from the actuator.

[RunningRich]

23psi on our pump gas with an untuned engine setup is a sure way to blow your engine up again.

To run that type of boost you need to be absolutely sure of what the ECU etc is doing. What Blitz ECU is installed?

[Mr Ree]

If you arent going to have it retuned, then install a wideband at the very least so you can monitor your AFR's.

As mentioned, 23psi is too much on our peasant fuel, especially when running a blitz ecu which is more than likely tuned to take advantage of 100RON fuel.

[strx7]

Some time later it broke a ring land, rebuild added eagle rods and wiseco pistons, which cracked and dropped a skirt 80000km later (after reverting to factory boost), which saw mahle pistons and a fmic

Cant for the life of me think why that happened.

Hope you like rebuilding your motor as its going to happen again & again & again, until it actually gets TUNED to run those boost levels

[blitza]

Some time later it broke a ring land,

Cant for the life of me think why that happened.

Ummmm, because it's a 3s?

read 'some time' as 40,000k's and who knows how long in Japan.
Still ran rich at full boost on the dyno.

I'm mostly hoping to confirm where the ecu sees and effects the boost,
Thanks for the mud map Fivebob.

[strx7]

Ummmm, because it's a 3s?

[/quote]

Because it needs 100 octane and or Igntion timing pulled out of the advance map.

[blitza]

Waaaaaaaaaaaaaaaiiiiiitt, are we talking about,

round 1;
Factory pistons dropping a ring land whild the missus was driving, Cause that happens to them at factory boost,

or round 2;
horrible rattly wiseco things things that after banging around for a reasonable amount of time work hardened and chicken'd out.

[iOnic]

Asks for advice - Doesn't listen to any of it...

[levinguy]

When I brought this car it ran 23psi, had a blitz compressor and ecu.
Some time later it broke a ring land

round 1;
Factory pistons dropping a ring land whild the missus was driving, Cause that happens to them at factory boost

[sergei]

Waaaaaaaaaaaaaaaiiiiiitt, are we talking about,

round 1;
Factory pistons dropping a ring land whild the missus was driving, Cause that happens to them at factory boost,

or round 2;
horrible rattly wiseco things things that after banging around for a reasonable amount of time work hardened and chicken'd out.

round 1: did your missus put 91 or 95 in it by any chance?
round 2: to run anything above 1bar you need a tune on those engine.
In reality on those engines running 98 is sub optimal in factory form. Add free flow exhaust and the factory map is out of the window.

If you want to run 23+ psi (~1.6bars) boost reliably on pump gas, you will need to drop compression to 8, 8.5 : 1. Alternatively you could just run 1.3bar on 9:1 with a very good tune and 98 only. No need to be greedy . Besides in most cases 200kW at the wheels Caldina, that is still 2.0L, will outperform 300kW 2.0L Caldina in most cases except maybe drag race.

If you want high boost + high compression, you will be looking at aftermaket ECU and expensive fuel.

[blitza]

When I brought this car it ran 23psi, had a blitz compressor and ecu.
Some time later it broke a ring land

round 1;
Factory pistons dropping a ring land whild the missus was driving, Cause that happens to them at factory boost

edited twice and i still missed your point.

iOnic, I'm not sure what you're talking aboot, maybe if you gave relevant advice and not silly comments i'd listen,

and because you're all jumping to conclusions except for the mad russian,

98 always, Blitz access ecu. Dyno'd with plenty of fuel accross rev range.


Thanks for all advice given, assumed opinion not so much.

OOOOOOOooooooooedit and round two was at factory boost as i wanted to wait untill i fitted the fmic to crank it again. 2.5" from the turbo flange.

[blitza]

here y' go 5Bob, now we've just got to wait for me to get around to fitting them....

And still stoked for fivebob's advice back in '09. love them

[sergei]

98 always, Blitz access ecu. Dyno'd with plenty of fuel accross rev range.

Plenty fuel across rev range is just one part of equation. Another part is timing, boost and intake air temperature.

With Blitz Access ecu's they have very aggressive timing maps, as they are tuned for 100RON fuel. The factory tune is already marginal, while blitz would push it even further to detonation land.

You cannot break ring land without detonation. If you break ring land, it is because it detonated. Which means whatever the Blitz ECU was doing was wrong, or you were running too much boost, or too poor fuel.

Even my 100% stock ST205 knocks occasionally on 98 on a hot day.

[blitza]

aaaaaaaaaaaaaaaand i guess a modded knock sensor may add a bit more to the equation come to think of it.

[Al]

I'm not qualified to post in this thread. Haven't blown up a 3sgte yet.

[Dell'Orto]

I'm not qualified to post in this thread. Haven't blown up a 3sgte yet.

You're doing it wrong

[loudstealthGT-Four]

I'm not qualified to post in this thread. Haven't blown up a 3sgte yet.

You're doing it wrong

[strx7]

aaaaaaaaaaaaaaaand i guess a modded knock sensor may add a bit more to the equation come to think of it.

now the light bulb starts to glow huh?

sounds like there are more and more things which are all giving a helping hand in the quest for another dead gt-t engine

[blitza]

aaaaaaaaaaaaaaaand i guess a modded knock sensor may add a bit more to the equation come to think of it.

now the light bulb starts to glow huh?

sounds like there are more and more things which are all giving a helping hand in the quest for another dead gt-t engine

etc,

Back in '09 you were quite helpfull and posative, now you seem to be all angry. and against everything, have you got your period?

I have a sneaking suspicion i'll never get into the 20s with my current setup, won't run full boost untill it's on a dyno being monitored, and am getting far too old (poor) to kane the pants off the thing often, if ever. there seems to have only been two posters that have shown intellect without making the general inference; "if you touch it you'll blow it, I'm much smarter than you"
While I am mildly ritard at times, I'm also quite happy to live with the
consequences of my choices.
I'm off to measure the speed of light with grated cheese.

'you're doing it wrong' classic.