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evo 9 vs evo 8 load calc.

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Old Dec 16, 2006 | 01:31 PM
  #1  
coolguycooz's Avatar
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From: California
evo 9 vs evo 8 load calc.

I am just wondering, when i log my evo 8 i hit load as high as 260 ish, with a spike to 21 psi.

Now i go to log my friends car, he also spikes to 21 psi, only his load gets up to about 242 and no higher, why is there such a big difference? Also how much is the load calculated off by? because i had 2 other people in the car with me once i pulled up a hill and i hit like 278 and it didnt cut fuel, my boost cut delay timer is still at 1000 m/s. So im wondering why i didnt hit fuel cut? and why i get a way higher load on an evo 8 then we did on an evo 9 the only thing i can think of is one of our boost gauges are off, but i doubt it because i use the stock boost control solenoid, and he has a MBC.
( this was done on the exact same road, both of us in the cars, both in mine and both in his).
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Old Dec 16, 2006 | 01:39 PM
  #2  
heyzeus11's Avatar
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From: Hampton/NN, VA
Originally Posted by coolguycooz
but i doubt it because i use the stock boost control solenoid, and he has a MBC.
because of this how did you determine that it could not be one of your boost gauges reading a little high/low?
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Old Dec 16, 2006 | 02:33 PM
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The load calc I came up with was only a stop gap until we found a way to output the real load. Now we can (I've posted some details previously, a few people have tried it on Evo 8 and 9 just fine) it is clear that the load calc can be a little high sometimes. To hit fuel cut it would have to breach the load limit continually for a full second.
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Old Dec 16, 2006 | 03:08 PM
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i spike to almost 300 load in my evo 9 turbo with about 24psi of boost.
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Old Dec 16, 2006 | 03:36 PM
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elhalisf, have you tried the request ID 00 and 01 mod for real load@? Load = 10/32*((255*requestID00)+requestID01)

Just noticed you have an Evo VIII but with a IX turbo, I think I posted some locations for the VIII, but if not they are not too tricky to find.

I find the boost limit and from there I find the routine that handles overboost. In there is the real load value. Once I know that I find the MUT table which is at the end of the ROM before the big unused gap. Then I substitute request ID 00 and 01 with the RAM locations of the real load value. Then with a mod to data.xml it gets chucked out into your logs.

Last edited by jcsbanks; Dec 16, 2006 at 03:39 PM.
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Old Dec 16, 2006 | 04:41 PM
  #6  
elhalisf's Avatar
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From: Chandler, AZ
I am using the mitsulogger to log the load. however, i use the calculated load to observe the 300 load spike.
when i log, i deselect load0 (ID00) and load1 (ID01). and can i assume that the load locations are the same in the VIII?
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Old Dec 17, 2006 | 03:56 AM
  #7  
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They are different in the VIII.
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Old Dec 17, 2006 | 07:33 AM
  #8  
MalibuJack's Avatar
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The locations vary based on the Rom your using, on the 7 and 8 ECU's their pretty much the same, I think only a few bytes offset at most..

On the 9 ECU, its a different rom and is in a different location. I do think it was documented somewhere though.
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