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Thread: SBC TPI 0411 24X conversioin

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  1. #1
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    It should be easy to do as long as you can come up with a crank sensor. Just use the distributor from a '96 and up Vortec engine. The 0411 was used on the Vortec 350 engines in the later vans, so you can grab a base tune from one of them to start with.
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

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    Fuel Injected! Mikey G's Avatar
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    I was actually going to go further and use the LS1 set-up with the Coil On Cyl. I have all the hardware. I have completed my harness as well. I was wondering if someone has had success with dialling in a cold start-up and idle with a "big" cam prior to purchasing all the software (?)

  3. #3
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    You'd probably be better off getting your preferred tuning suite first (or getting someone else to flash a starter tune on it). You won't even be able to start a 0411 setup until you've went in and disabled VATS.
    1973 K-5 Blazer, TBI 350, TH400, 1 ton axles & 38" SSRs'
    1975 280Z, TBI 350, 700R4
    1953 M-38A1, TBI Buick 231
    1951 Ford Panel, 5.3 with 4L80E

  4. #4
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    Cold start is one of the toughest things to get right. You absolutely need to make sure the voltage corrections are correct for your injectors. During cranking the system voltage drops and after startup system voltage is higher while the battery recharges. If you have a WBO2 it may be possible to start it and warm it enough to get readings during cranking and startup. It's extremely helpful. It's important to separate cranking from cold running after startup. Fuel delivery during cranking can over-fuel the engine which can cause slightly rich operation after startup to seem overly rich. I like to find a rich and lean "stop" for cranking then work from the area in the middle letting the engine tell me what it likes. Remember to try and be roughly consistent with the starting temp. Without some way to monitor what's happening (I've used an ignition scope to watch firing voltage change, and I've tried a quartz filled spark plug to provide a "window" into the chamber ) it really takes something akin to Zen to devine where to start making changes. If it starts ok hot try starting at cooler and cooler temps to see how it goes. And be patient because you may only get one or two chances in a day to try again.

  5. #5
    Fuel Injected! Mikey G's Avatar
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    Quote Originally Posted by 1project2many View Post
    Cold start is one of the toughest things to get right. You absolutely need to make sure the voltage corrections are correct for your injectors. During cranking the system voltage drops and after startup system voltage is higher while the battery recharges. If you have a WBO2 it may be possible to start it and warm it enough to get readings during cranking and startup. It's extremely helpful. It's important to separate cranking from cold running after startup. Fuel delivery during cranking can over-fuel the engine which can cause slightly rich operation after startup to seem overly rich. I like to find a rich and lean "stop" for cranking then work from the area in the middle letting the engine tell me what it likes. Remember to try and be roughly consistent with the starting temp. Without some way to monitor what's happening (I've used an ignition scope to watch firing voltage change, and I've tried a quartz filled spark plug to provide a "window" into the chamber ) it really takes something akin to Zen to devine where to start making changes. If it starts ok hot try starting at cooler and cooler temps to see how it goes. And be patient because you may only get one or two chances in a day to try again.
    I don't currently have a WB02, but is on my list of things to do during the swap over to the 0411. I will certainly keep an eye on the cranking voltage drop. I was considering getting a local tuner in olved with the tune after start up. He is very well know around here and his speciality is 0411 set-ups in many applications. Many LS conversions some around the 600 RWHP range. He said he will have no problems tuning my set-up. But he might be talking through his hat just to get the work. I was hoping to get some sort of confirmation the 0411 is capable - in the right hands.

  6. #6
    Super Moderator dave w's Avatar
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    My daily driver 1999 S-10 has a Bone Stock L31 Vortec 5.7 liter with 24x. See attached pic.

    For a starter flash, I modified a 2002 5.3 Liter flash.

    dave w

  7. #7
    Fuel Injected! Mikey G's Avatar
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    Quote Originally Posted by dave w View Post
    My daily driver 1999 S-10 has a Bone Stock L31 Vortec 5.7 liter with 24x. See attached pic.

    For a starter flash, I modified a 2002 5.3 Liter flash.

    dave w
    Very nice install dave w. Looks factory installed. Being bone stock, I'm sure dialing in your tune was not so difficult. I don't think I will have it that easy.

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    Quote Originally Posted by dave w View Post
    My daily driver 1999 S-10 has a Bone Stock L31 Vortec 5.7 liter with 24x. See attached pic.For a starter flash, I modified a 2002 5.3 Liter flash.dave w
    I have a modified 8.1 flash in my Express van.It is DBW, 24x on a Marine intake on a L31 with worked 906 heads and a Marine '395 cam with 1.7 rockers.

  9. #9
    Fuel Injected! Mikey G's Avatar
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    Quote Originally Posted by fastacton View Post
    You'd probably be better off getting your preferred tuning suite first (or getting someone else to flash a starter tune on it). You won't even be able to start a 0411 setup until you've went in and disabled VATS.
    I had intensions on getting my 0411 re-flashed with the F body (cable drive), and also having the VATS disabled prior to a start-up

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