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Old 01-16-2008, 05:04 PM   #26
benw
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Join Date: Dec 2005
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However, if the AFR targets weren't being met because the MAF scaling was off, then in stock form you're getting bad load data anyway. Fixing the MAF scaling would fix both the AFR targets AND give you correct load data.

The real question is what's wrong in the stock tune.
we're talking stock cars here, and from what I've seen, the stock airbox and ECU calibration are pretty darn close. I've only seen about 6-7 cars but they were all within 3-5%. The only one that wasn't had a dirty maf sensor, cleaned it up and all was good.
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Old 01-16-2008, 05:46 PM   #27
ExpO
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Originally Posted by williaty View Post
Testes, if the injector scaling is the actual problem, then fixing it rather than MAF scaling is the correct thing to do.

However, if the AFR targets weren't being met because the MAF scaling was off, then in stock form you're getting bad load data anyway. Fixing the MAF scaling would fix both the AFR targets AND give you correct load data.

The real question is what's wrong in the stock tune.
The injector scaling would give a consistent change across the board, the errors i've seen are not. To me that points to either just the maf table, or both.

With that said, it is a good point about changing the maf table... it will affect anything load related.
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Old 01-16-2008, 07:43 PM   #28
williaty
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Originally Posted by ExpO View Post
The injector scaling would give a consistent change across the board, the errors i've seen are not. To me that points to either just the maf table, or both.

With that said, it is a good point about changing the maf table... it will affect anything load related.
I've seen exactly the same thing on my car. The error is not consistently in one direction, and you can't fix that with just injector scaling.
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