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Thread: Mass to be delivered / RPM multiplier cylinder 1-8 ??? ECM34177 -

  1. 02-06-2022 #1
    f.creek-ranch
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    Mass to be delivered / RPM multiplier cylinder 1-8 ??? ECM34177 -

    I took a look at this on 2010-2014 RT and SRT and have a theory..

    RT have fuel enrichement on cyl 5 and 6, are they hotter on high RPM ?

    SRT have the complete Bank 1 richen, Inlet correction by slanted throttle ?

    So this have to be corrected by changing the throttle/intake system ?
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  2. 10-14-2022 #2
    GrannySShifting
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    anyone familiar with these tables?
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere
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  3. 10-21-2022 #3
    rockystock
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    I've been trying to tune bank-to-bank fuel trims over the last week using the RPM multiplier tables. So far, it does not look like they're having any effect. I tried setting the Bank 1 cylinders at 1.07 above 5,000 RPM, but fuel trims have not responded...
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  4. 10-25-2022 #4
    GrannySShifting
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    Quote Originally Posted by rockystock View Post
    I've been trying to tune bank-to-bank fuel trims over the last week using the RPM multiplier tables. So far, it does not look like they're having any effect. I tried setting the Bank 1 cylinders at 1.07 above 5,000 RPM, but fuel trims have not responded...
    Its populated with data in some OE SRT applications, so Id think it functions on SOME??
    Factory Stock 97 SS M6 13.51 @ 104.3 mph
    Stock Longblock LS1 w/ 233/238 P.S.I. Cam
    10.81 @ 126.9 Full interior, six speed on 275 radials, a decade ago

    '99 TA trunk mounted 76mm 6 Liter
    9.0s in '09 @ 153 MPH

    Turbo 5.3 Volvo 740 Wagon
    32psi and still winding out 5th on the highway somewhere
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  5. 10-25-2022 #5
    rockystock
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    Quote Originally Posted by GrannySShifting View Post
    Its populated with data in some OE SRT applications, so Id think it functions on SOME??
    Yes, the stock 392 calibrations add some fuel to Bank 1 at higher RPM. The suspicion out there is that the angled intake causes a little bank-to-bank imbalance. Two of the cylinders are dialed up around 5%, and the other two are around 2.5%, if memory serves...

    I have probably the opposite problem, where my asymmetric exhaust is causing some imbalance. From ~3000 to ~5000 RPM, Bank 2 peaks at around 6-7% richer than Bank 1 (my Bank 2 has an overall longer exhaust path).
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