Umm! I need help with this questions.

A) -Engine stock of evo VIII resists 23psi to red line? Or only this pression to 5000rpm maximum for safe?

B) -Turbo Stock Evo VIII resists 23psi to red line?

C) -In 23psi of turbo, where is the Load in ecuflash, 260 or 280?

D) -For Add more Load boxes (Axis X) in ecuflash? My maximum is 260.

E) -For log MAP Apexi AVCR in EvoScan or Ecuedit??

F) -Is good AFR --> 2500 to 3000 : 12AFR , 3000 to 7000 : 11,5 AFR , 7000 to 7500 11AFR.


Verrrrry Thanks!! The next week-end tune my evo, and i need answers. And sorry my bad english.

Ruben

 

happy to see someone from Spain on board.

my impression of what you are asking is weak,...

it is rare that a stock VIII will maintain 23 psi much beyond 5000rpm. they typically fall off to around 17 psi at high rpm.
if you can maintain 23 psi to the top it is probably OK.
my VIII will only show around 230 load at 20 psi, and around 250-260 at 25 psi. you may well have a number higher with better tuning, and I believe euro evos are higher strung.
you can raise your map load figure but you don't need to until you out perform the table.

your suggested afr is fairly safe, and a good place to start. remember whatever afr you use adjust your timing to suit.

good luck Ruben and I hope some one can better answer your questions.

 

Thanks!! With Apexi AVCR non fall off pression

I need help in the questions!!

 

I have seen some VIII's hold 23 to redline because of how the intake was designed. Its not a matter of how much boost as much as the quality of the fuel and the timing (this is where the tuning comes in) that determines whats safe.

AFR's are good

If you can log boost from your AVCR then I would do that. If you can use the JDM 3 bar MAP sensor on your intake manifold, that is the preferred way.

To rescale you the load you need to remove a lower load area (like 20 lets say) and move everything over and then reassign the value. I will look for the link.

 

https://www.evolutionm.net/forums/sh...ling+stock+ECU

 

Stock turbo will make lots of turbine back pressure at high rpms when trying to make boost up there on a closed WG, but at 5000 rpm it can deliver more than enough boost. Decreasing valve overlap might balance this out a little by pushing the power towards redline

 

here was a log from me at high RPM, 20psi to redline, i had to reduce timing becuase I was knocking, this is 25psi peak, 20 redline
throttle rpm load timing
100 5000 259.18 6
100 5062.5 262.73 5
100 5093.75 260.43 5
100 5218.75 258.31 6
100 5187.5 252.46 5
100 5281.25 252.46 5
100 5343.75 248.85 6
100 5375 246.54 6
100 5468.75 244.21 7
100 5500 244.21 8
100 5531.25 244.21 8
100 5625 242.92 8
100 5656.25 242.81 8
100 5718.75 240.37 8
100 5750 240.37 8
100 5812.5 239.12 10
100 5843.75 239.01 10
100 5937.5 234.33 10
100 5968.75 237.78 10
100 6000 236.55 11
100 6062.5 238.75 10
100 6125 238.95 10
100 6156.25 235.44 10
100 6218.75 235.24 11
100 6250 235.34 11
100 6312.5 235.44 11
100 6343.75 230.75 10
100 6437.5 228.32 10
100 6437.5 225.96 12
100 6500 228.42 12
100 6562.5 224.81 12
100 6593.75 224.81 12
100 6656.25 227.16 12
100 6687.5 226.11 12
100 6750 224.87 12
100 6812.5 224.87 13
100 6812.5 223.74 13
100 6875 223.85 14
100 6906.25 226.05 13
100 6937.5 222.53 15
100 7000 221.97 15

 

nice!

 

i m 23 psi the evo8 at 7000
boost controlleur AVCR
evo8EUDM
the load 257 at 7000
oct98

 

Veeeeeey thanks!

Other questions...

a) is safe 11.5 for 23psi (3500 to 5500)??
b) horsepower 23psi stock turbo?

 

Help me! please!

 

at 5000 11.5 is to lean, i would defi. rich that up to 10.5
thats just me.

 

10.5???? for AFR???

 

everyone has an afr they like. Ive seen ranges from 10.5 to 12. If your not knocking I tend to the leaner. Figure its like politics or religion. No body agrees and everyone says the other guy is a wack job.

 

OK! but... what is the best AFR(in safe mode) for turbo at 23psi. 11.3??