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Funky base map but car runs fine.

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Old Sep 9, 2024 | 01:32 AM
  #1  
Datsun 510 guy's Avatar
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Default Funky base map but car runs fine.

This screenshot is of my NA6 turbo base map on a Haltech Elite 750. The steady state AFR is at the target is all the cells where VE < 30 but this sure doesn't seem right, although the car runs/drives just fine. It's an internally stock fresh rebuilt NA6 with a little GT2554R turbo. Injectors are Injector Dynamics 1050x. The map looks to me what I'd expect if the injectors were bigger than what I have specified.

My only thought is when tuning the base map should O2 control be disabled? Haltech's documentation is good at saying what a setting specifically does, but they give no context of "if doing this, don't do that". I kind of refuse to believe VE is so far off a stock NA6 seeing as off boost it's...a stock NA6 with big injectors.

What's borked up here?



Old Oct 8, 2024 | 03:50 AM
  #2  
dan998's Avatar
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I ran into a similar issue with my NA6 on an Elite 750. My VE table was really low after some tuning as I had my injectors CC to low. Try doubling your flow rate to what the injectors are rated at, and reset to the base map and start tuning again.
The earlier model NA's use batch injection (not so sure about later models), which similar to the wasted spark ignition on the NA6, it will fire two of the fuel injectors at once. This is why you should double the flow rate and start tuning again.
In the NA6 base map provided by Haltech, you will notice the stock injector CC is nearly doubled (at 400). You will also notice the Fuel Injection mode is semi-sequential (which means it will squirt two amounts of fuel per cylinder per cycle).

I hated the batch injection setup on my NA, so I ended up making a custom loom and wired my car up for fully sequential injection. You will notice a night and day difference around idle doing this.
Old Oct 9, 2024 | 11:21 PM
  #3  
engineered2win's Avatar
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1) Your VE map is really hard to read. Engine speed is always on the X axis, so it makes it rather difficult to compare to every other map on the site.

2) Where did you get your dead times from?
Assuming you're running a NA6 FPR (roughly 38-45psi), which is approximately 300kpa. That puts you here:

So at roughly 13v you're like 17% off.
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