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Changing AFRs.

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Old Apr 20, 2007 | 07:09 PM
  #1  
Ljavy17's Avatar
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From: Miami
Changing AFRs.

I was wondering how many Points you guys change to see a significant difference in your AFR.
RIght now my car is running high 10s, in 6 to 7k. I took away .030 from 6k to 7k and its still pretty rich!
I was wondering if I should take away like a whole .10 or something.
How much should I change it to see around 11.5.
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Old Apr 20, 2007 | 07:25 PM
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messing around with the PE table is not the right way to do things to get a leaner AFR. Put the car in SD and tune the VE table. if you want a 11.5AFR then set the PE table to 14.68/11.5= 1.276 in the 6000rpm to 7000rpm range. then tune the VE table to get the AFR that you want.
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Old Apr 20, 2007 | 07:31 PM
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actually.. PE is the correct way to edit WOT enrichment..

Although, having a good base VE table is important too because PE just muliplies the VE table.
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Old Apr 20, 2007 | 07:38 PM
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I already have a good Base VE table, I am only trying to perfect the WOT AFR, I am using the same tune 06blackss.sc had on his car when he put down 296 I am also using the same meth mixture and everytying, So I donnu.
WHat do you guys think.
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Old Apr 21, 2007 | 12:15 AM
  #5  
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Originally Posted by TVS_SS
actually.. PE is the correct way to edit WOT enrichment..

Although, having a good base VE table is important too because PE just muliplies the VE table.

i disagree. I have been told by many people that you set your PE table to the AF ratio that you want. Ex. If i want a 12.2 AFR then: 14.68/12.2=1.203

then you use the AFR % ERROR histogram with logged data and paste the %Error into the VE table untill your error is close to 0 and then you will end up with a 12.2 AFR.


The problem that i see with adjusting the PE table to lean it out is that you are just "guessing" at how much to change the PE table by. there is no histogram showing you what %error you have. its simply just a guess.

I guess in the end either way will give you the same results. i have just always been told to set the PE table and adjust VE.
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Old Apr 21, 2007 | 11:15 AM
  #6  
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From: Canada eh!
Originally Posted by Kennyspec
i disagree. I have been told by many people that you set your PE table to the AF ratio that you want. Ex. If i want a 12.2 AFR then: 14.68/12.2=1.203

then you use the AFR % ERROR histogram with logged data and paste the %Error into the VE table untill your error is close to 0 and then you will end up with a 12.2 AFR.


The problem that i see with adjusting the PE table to lean it out is that you are just "guessing" at how much to change the PE table by. there is no histogram showing you what %error you have. its simply just a guess.

I guess in the end either way will give you the same results. i have just always been told to set the PE table and adjust VE.
Agreed, these cars are really easy to tune once you get them in OL SD mode. Evertything is adjusted by afr error % all at once.
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Old Apr 22, 2007 | 03:46 PM
  #7  
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Originally Posted by Kennyspec
i disagree. I have been told by many people that you set your PE table to the AF ratio that you want. Ex. If i want a 12.2 AFR then: 14.68/12.2=1.203

then you use the AFR % ERROR histogram with logged data and paste the %Error into the VE table untill your error is close to 0 and then you will end up with a 12.2 AFR.


The problem that i see with adjusting the PE table to lean it out is that you are just "guessing" at how much to change the PE table by. there is no histogram showing you what %error you have. its simply just a guess.

I guess in the end either way will give you the same results. i have just always been told to set the PE table and adjust VE.

we are saying the same thing.. if your VE table is correct.. you adjust your PE table to get the desired AFR you want.

your afr error just helps you correct your ve table so that your PE table makes sense..
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