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Thread: Modified L31 with a Proflow 4 system

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  1. #1
    Fuel Injected!
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    Quote Originally Posted by TriumphR3 View Post
    Awesome Fast. Everything looks spot on.
    Thanks and they do. Bit of a mystery why long terms and short terms are as far off as they are, but they are correcting in opposite directions and the actual air/fuel ratio is close to the commanded, so does not concern me. The PF4 does not activate the long term correction updates until 165F. I think with more run time and mileage it will all even out.

  2. #2
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    Yes sir I believe they will. That is really a nice setup.

  3. #3
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    I found a NOS, discontinued Spectre air cleaner housing I have had my eyes on. $250 at Summit when Spectre last offered it for $150 on Ebay and it comes with the re-useable 14x4 air cleaner. Seller still has 8 showing available at this time, just FYI. I found some large scoops listed for saw dust collection, that I plan to fit into the front core support on each side of the condenser. Also found some 4 layer, insulated flexible 4" duct that looks like the single layer plastic intake tubes GM used on the 70s and 80s vehicles externally. Thus it is getting a dual 4" cool ram air intake system. Should help out the intake air temps a lot on a hot summer day preventing hp loss.

    My plan is to tape off the lid and paint the sides and bottom with universal semi gloss black engine paint, leaving only the lid shiny like the old LT1 or Z/28 350s.
    Attached Images Attached Images

  4. #4
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    Quote Originally Posted by TriumphR3 View Post
    Yes sir I believe they will. That is really a nice setup.
    Thank You

  5. #5
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    Nothing like keeping the factory look.

  6. #6
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    I do like keeping things under cover as much as possible.

    Tested the ram air function earlier with the filter in place. With two scoops in place should be even more effective.

    https://youtube.com/shorts/MLogcEp7g...Wi9iDfGFzOoyL9

  7. #7
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    Ducting arrived today, re-tested with the full lengths of 4" ducting. It will be cut to proper length when it is fitted.

    https://youtu.be/s6MIf4ckeAE?si=JnvdC8_HneXgL0L5

  8. #8
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    That is definitely something I’m going to look into, as I’m running a 14” open filter. I had always wondered about heat sink and what kind of affect it would have my 88 C1500
    Last edited by TriumphR3; 02-23-2024 at 11:45 PM.

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