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Thread: 6.0l

  1. 06-16-2022 #1
    Hotrod85
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    6.0l

    I have a 1979 firebird. Ls swapped. 6.0l flat top pisto ns. Tsp 228r cam w/ springs. Ported 243 heads. 4l60e. Summit fuel cell with inline pump and corvette filter for return .runs good just driving around fuel trims are good. Anything over half throttle starts backfiring/missing. Let off a little and drives normal. I dont have knocl sensors installed. So trying to figure out miss is killing me. Afr reading 12.3-14.0 at 2000-3500 rpm and doesnt matter how much fuel i add or take away still feels like a miss/Fuel cut. I dont have an inline pressure gauge. Took feed line off to check. 60 psi inline engine off
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  2. 06-16-2022 #2
    5FDP
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    Post the tune and logs.

    Does it also have bigger injectors? Because the stock 6.0 injectors are no where near big enough.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.
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  3. 06-16-2022 #3
    Hotrod85
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    Yes. Put a set of 2010 camaro injectors i got for free in it. Just got the the flow rate data online the day before yesterday for it. Im mechanic not a tuner. But i do daily drive a 04 silverado with a 6.0l with 243s. Almost same everything. And it drives great and i figured that tune out
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  4. 06-16-2022 #4
    5FDP
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    Did you also get the min injector pulse, short pulse adder and voltage offset data for them as well?
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.
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  5. 06-16-2022 #5
    Hotrod85
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    Ill post them in the morning. If i can figure out how. The only thing i saw tonight was rpm looked delayed. Constant throttle position rpm looked like it went from 2200 or so down to 1600 then climbed to over 3k with with constant pedal
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  6. 06-16-2022 #6
    Hotrod85
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    I got the voltage offset. I was told min. Inj. Pulse and short pulse adder would be ok . Im assuming it could cause issues but would it be running rich if min. Pulse or short pulse was off?
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