EVO9 problem with XML and boost level

[evo400]

So any comments ? How is my setup ?

[ralliart]

How much "load engine" you have with this map ?

- Hight octane Fuel map :poor in fuel on Low/high rev && high load HP fuel pump (warlbro G242 or equiv) is strongly recommanded

I flash your map this Week, I log some params and after I comments objectively

[evo400]

How much "load engine" you have with this map ?

- Hight octane Fuel map :poor in fuel on Low/high rev && high load HP fuel pump (warlbro G242 or equiv) is strongly recommanded

I flash your map this Week, I log some params and after I comments objectively

There is a problem with engine load in higher revs because the boost restriction makes unable to run higher load than about 240 or so. 159,4+80 load is set in this posted map.

I was trying to go from 260desired load in all revs. First lowered the basic duty from 159,4 to aprox 140 and set the offset from 80 to 100. After this was the boost still so as with offset 80+159,4 (same as 100+140) and i tryed to set more desired load in higher revs, but there was no difference in 100+140 or 100+159,4, the boost is still falling down dramaticly. I decided to buy uprated actuator, and this should be on the way from shop now.

Need of a new pump is some art of safety upgrade, i made it in same time with exhaust upgrade. The walbro 255lph makes some noticeable sound at standing still or parking, but when you drive you cant hear it.

Also newer try to upgrade your car without knowing whats going happend in the engine. I always use WB + EGT to tune cars. The stock car was so piggy rich that there was a big problem with EGT, it was tooo high. The fuel mixture was not able to burn fast enough and it was still burning even when it was already it exhaust manifold and it makes the manifold 970°C hot at little throtle staying at 100mph. After my leaning it from 9:1 to somewhere about 10,5-11:1 it is 100°C colder now, and the owerall engine response is way much better. The engine is more like honda happy reving engine now.

I think you should know that your desired A/F is really so as you think. Your boost should be safe if you have nothing over 1,7BAR. The rest is in ign advance and this is what i have set in posted map to very safe level, aprox to -5degrees or so from my ign map. You also need to upgrade only the High octane 2 map because this map is used when the engine is hot and Ok, the other maps should stay not touched.

In my Country is the bet fuel what you can buy at gasstaion the SHELL V-power Racing and it has about 100OCT RON and 93OCT MON. I newer use anything worse like 98 or 95. If you should need to run this lower quality fuel with so agressice map as my is, you should newer come into the boost, and everything should be ok.

[ralliart]

Many thank's for your explanation, your analysis and your observations are exact. You already used one exhaust manifold ? if yes, what is the benefit on evo IX or VIII ?

Are you the "evo400" of this link : http://www.evo400.co.uk/ ?

Yes or No isn't a problem just for lightening my curiosity

[evo400]

Many thank's for your explanation, your analysis and your observations are exact. You already used one exhaust manifold ? if yes, what is the benefit on evo IX or VIII ?

Are you the "evo400" of this link : http://www.evo400.co.uk/ ?

Yes or No isn't a problem just for lightening my curiosity

My exhaust manifold is stock for now, but thinking about some turbokit (may be AMS GT35R). The benefit is in more flow, but how exact ? This will allow get more air true engine so this will allow you push it more to the limit as the stock piece, but the stock manifold is nearly so good as some good aftermarket, but you must do some work on it, some porting, grinding etc,....

No I am not the evo400 at lacerregister or at evo400.co.uk. My nickname on that sites is "veta". But nickname does not mind. Only what you know is what counts

[S54fan]

I would strongly advise against fitting an uprated actuator if you have the correct restrictor(s) or boost controller fitted.

Using the stock actuator on my UK FQ340 with 3" catless exhaust, airbox mod, Walbro and AVC-R I set the solenoid to max out and logged the following top end in 4th gear on the standard actuator:

4th gear, 6000 RPM, 268kPa, 263 load, 9 deg timing, 88% IDC

4th gear, 6500 RPM, 259kPa, 247 load, 10 deg timing, 94% IDC

4th gear, 7000 RPM, 246kPa, 232 load, 12 deg timing, 100% IDC (ECU requested over 100%)

I run about 11.2:1 AFR at these revs on UK V-power (99+ RON).

I log load from changing the MUT table to output load on request ID 00 and 01. I log MAP from the car's 3 bar MAP sensor.

I find that on this octane of fuel that the car feels strained running this extra boost. I think it performs better running 255 at 6000, 250 at 6500, 245 at 7000 as the targets on my AVC-R.

The rising wastegate duty cycle does betray rising EMAP, which will only choke the engine, pollute the fresh air charge, need retarded timing, raise EGTs, not make extra power. Now if we add methanol or a bigger turbo it is a different story...

[evo400]

S54fan: My boost is not so high as yours. I am able to boost up to 1,8BAR but never got something more like 1,35 at 7000RPM. My A/F ratio is still safelly rich and never got problem to hold it in that safe area.
Try to look at http://server1.advnet.cz/video/Brno_29_10_2006_DRAG.mpg
http://server1.advnet.cz/video/Brno_29_10_2006_VRCH.mpg
you can see 1,5BAR max and 1,35BAR at 7000RPM.
As i described higher i am using desired load ~240 going up to ~260 at redline, but still no difference at all, still too low boost at redline. We rerouted the air going from the solenoid, now using greated tube going into original breathing hole from cams (cams are breathing to air now). This mod gives me more spike boost, more midrange boost with same setting, but still nothing at redline.

I was playing with my AVC-R and i definitly hate it! There is no problem to set 1,5BAR , 1,6BAR, 1,8BAR but this f**ing piece of crap is still trying to corect something and never hit twice the same value. And it was terrible at spool! Because if i wanted to set 1,1-1,3BAR at 2000-3000RPM to smoothen the boost curve it was regulating so hard that the turbo always started to surge and with the MAF car is it terrible twice because it thinks that the air is going into the engine but the oposite is true in moment of surge.

So with the uprated actuator - im just thinking about stabilize my boost and wait until the AEM EMS for IX will be out. This is what i know to use, and had never probles with it. No more stupid load or something dement. Next the 35R turbine, 1000ccm injectors and forged internals

[S54fan]

I used to get a bit of compressor surge until I modified the airbox lid. Now I can pull in 1 bar at 2250 RPM in top gear with no surge, and hit 1.65-1.75 soon afterwards.

I think the key to the AVC-R is not using self learn and getting the duty cycles very close.

If you only have a single solenoid on your model (dual on JDM/UK IX) then I think you'll need to modify the restrictor just off the compressor outlet to see more top end boost. Apologies if you've already done this and this is what you mean. The actuator is also adjustable for more pre-load which might help.

[evo400]

More restriction on compressor outlet gives me more overboost, but not more top end boost, so i use some reasonable pill for smoothing the boost corrections.
Thinking about boost regulation : If i have 1,1BAR basic pressure and want to have 1,5BAR i need to regulate 0,4BAR, if used 1,35BAR actuator, need only 0,15BAR to regulate. This should be more acurate, but if it will be ?

[S54fan]

There is a test to see if the wastegate is being blown open by exhaust manifold pressure, but it can be unsafe if you don't do it correctly.

You can disconnect the pneumatic line to the actuator and then open the throttle at 6000 RPM. You will then get the max boost that the actuator will allow because the exhaust manifold pressure opens it. This can tell you whether your issue is really boost control or the actuator is weak. However, if you open the throttle at 3500-5500 RPM you might get very dangerous overboost so you have to drive very carefully when doing this test and beware of the consequences. Always watch the boost gauge and be ready to lift off if it goes too high.

Another option is to retry your AVC-R with self learn off, 1.80 target, and 90% duty cycle at 6000 RPM+. This is how I managed to run 259 kPa at 6500 RPM. Although now I set the target to 1.50 at 6000 as explained before for efficiency.

A stronger actuator can be an easy solution, although it is fiddly to get to on the Evo to fit and adjust. It can also make it possible to run excessive exhaust manifold pressure for pump fuel.

[evo400]

I know what you mean, good idea is also set lower IGN timing at high load areas, to be sure, no knock happends.
My efficiency may be better at higher boost level comparing to you, because i have AMS Intercooler. Target is to get 1,65BAR at midrange and 1,5BAR at revlimiter.
We also have Shell V-power Racing at 100OCT RON
My IX GSR is Euro spec with only one solenoid.

What makes me sad is that it looks like the ECU has some lag before it starts to regulate.

I dont want that much overboost, because if the engine gets that much load at overboost it must be damaged due overboost or it can handle it and i can use that level of boost. So if the overboosted level is too high for the engine it makes some damage on it, that will destroy it in shorter time as it would be without overboost ... right ?

[S54fan]

I like your style, that is the way I think - if it can handle the peak it can manage to hold that level However, even with your enhanced intercooling, the time that you run higher boost for is important as exhaust gas temperatures will climb more the longer you run the boost level for. So a brief peak will be kinder than a prolonged one.

[evo400]

I dont use my car for long full throtle rides, because it goes too fast than

In the reality it was more dangerous at stock maps , because going 100mph / light foot at closed loop and temperature going over 970°C was not my idea
Now after my remap was the temperature never over 900°C

Now we have winter, and i allmost spin all tires at 3rd and wet

[S54fan]

970 is pretty toasty. I've damaged Subaru engines running such temperatures (although at excessive boost levels with large turbos).

[flash]

with this example we can see that are 2 ways to get more power.
the typical us-style with "high-boost", richer a/f´s and low timing.

evo400 use the jp-style with "mid-boost" (1,5bar) and lean a/f´s.
playing around with the timing and power comes alone.

very interesting to see

my favorit is the second one.