Sanity check please - seeing some odd things after injector scaling and LS6 MAF
07-20-2004, 10:25 AM
#1
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Sanity check please - seeing some odd things after injector scaling and LS6 MAF Ok gang, I've been trying to get my LTRIMS down to an acceptable level. I've got the SVO30 injectors in, and I've scaled the table according to ChrisB's chart. I've also installed a descreened LS6-MAF (and have scaled my table with the descreened table from ls1howto.com).
To get my LTRIMS down to under +10, I've had to richen my IFR table up by 13% *after* scaling. The car, although running VERY strong, uses a lot of gas. If I go back and lean the IFR out just a couple of %, then the LTRIMS creep up again, but the car gets much better gas mileage.
I guess my question is this... w/ the mods listed in my sig (TEA Stage II 5.3 heads, TR224 cam, LS6 intake, FLP headers w/ no cats, and most any other bolt-on I could find) are others with similar setups finding the same thing? I can richen the IFR table some more, but the car begins to stink and the gas mileage gets worse, but the LTRIMS get closer to 0.
I'm still running a stock VE table and a stock offset table. Should I just keep the IFR scaled at the SVO30's and tune w/ the VE table or keep tweaking the IFR to get as close to possible and then attack individual LTRIM cells w/ the VE table?
I guess I'm a bit confused as the best avenue to take. Any and all help is greatly appreciated.
To get my LTRIMS down to under +10, I've had to richen my IFR table up by 13% *after* scaling. The car, although running VERY strong, uses a lot of gas. If I go back and lean the IFR out just a couple of %, then the LTRIMS creep up again, but the car gets much better gas mileage.
I guess my question is this... w/ the mods listed in my sig (TEA Stage II 5.3 heads, TR224 cam, LS6 intake, FLP headers w/ no cats, and most any other bolt-on I could find) are others with similar setups finding the same thing? I can richen the IFR table some more, but the car begins to stink and the gas mileage gets worse, but the LTRIMS get closer to 0.
I'm still running a stock VE table and a stock offset table. Should I just keep the IFR scaled at the SVO30's and tune w/ the VE table or keep tweaking the IFR to get as close to possible and then attack individual LTRIM cells w/ the VE table?
I guess I'm a bit confused as the best avenue to take. Any and all help is greatly appreciated.
07-20-2004, 04:05 PM
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This is pretty odd, any Delphi 85mm MAF (other than
the resistor-modded SLP and Pace units) should throw
you way rich and your LTFTs very negative. So should
bigger injectors, minus any correction.
It's possible that headers (? - not listed, but I'm guessing
part of the "too many to list") may be the thing forcing
+LTFTs but perhaps from a false reading rather than a
true lean condition. I think this situation is begging for
some wideband data at idle, cruise and WOT to let
you distinguish between the various error possibilities.
the resistor-modded SLP and Pace units) should throw
you way rich and your LTFTs very negative. So should
bigger injectors, minus any correction.
It's possible that headers (? - not listed, but I'm guessing
part of the "too many to list") may be the thing forcing
+LTFTs but perhaps from a false reading rather than a
true lean condition. I think this situation is begging for
some wideband data at idle, cruise and WOT to let
you distinguish between the various error possibilities.
07-20-2004, 10:05 PM
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Thanks for the responses, guys. I'll look into what I can turn up w/ the VE table. Is there any WB 02 GP's going on? Where's the best place to get a good DIY kit?