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Thread: Speed Density or MAF/IAT?
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09-24-2021 #1Registered User
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- Sep 2021
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Speed Density or MAF/IAT?
I bought this 74 Nova with a Swap already done (kind of). The person I bought it from didn't know much as he bought it from someone who lost her husband and she didn't know either. So as I go along and learn both classic car basics I am also learning about LS swaps (I know it's an LM7). I can assume this person did quite a bit to the engine since it has a nice Holley Pan, Cam kit, etc... but I just don't know everything he did. First thing I need to figure out is the IAT sensor (Missing) and the MAF sensor (Missing). I am starting to wonder if it might have been deleted and converted to speed density. How would I check for that? Is Speed Density better than MAF/IAT sensors?
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Chevrolet Nova Custom 2dr Coupe Information
- Year: 1974
- Model: Custom 2dr Coupe
- Engine: 5.3L Vortec LM7 with a Stage 3 Cam Kit (out of a 2002 Suburban)
- Body/Exterior: Stock but solid
- Front End: Stock for now
- Transmission: 4L60
- Rear End: 3.73:1
- Exhaust: Dual custom
- Wheels/Tires: 205/60R15 fronts 235/65R15 rears on American Racing AR61 Outlaw Rims for now (not pictured)
- Interior: all stock cloth but I have plans to upgrade to custom leather
- Electrical: all stock except the LS Harness
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09-24-2021 #2Registered User
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- Sep 2021
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Well I found the plug finally. They had it tucked away (thank god they didn't cut it off) inside the fender.
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09-25-2021 #3Registered User
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- Mar 2020
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Proper speed density tuning still requires the IAT sensor.
For a typical street build, I would always retain the MAF, although it takes twice the tuning effort to get everything correct as you still tune as speed density & then MAF only.
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09-25-2021 #4Registered User
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- Sep 2021
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