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So, been tuning this truck SD mode for awhile now, when in boost, it feels sluggish, and is not as fast as I think it should be.. I feel like its on par with a stock truck.. I put a MAF back on thinking that would help.. Still does the same thing in maf mode.. Heres current log and tune for maf only.. Yes I know fueling still tunes cleaned up..
5.3
Camshaft 218/227 duration, 112lsa, .520 lift.
ls6 valve springs
7875 turbo
Deka 80lb
4l80e swap
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its just how SD is. for your MAF use these graphs layout to dial in you're MAF.
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Thats the exact tables I am using for maf.. I am leaning toward a torque management issue.. almost feels like its cutting spark or closing the throttle
Throttle's not closing and it's not cutting timing - just looks like it hits a wall a lot like valve float, which you could turn boost down and check, an exhaust restriction or spark blow out. At least those are the things I would start checking.
Its a 3" straight pipe all the way out to the back, and plugs are tr6 gapped at 22. Maybe the exhaust is too small? I'm going to check coils and plug wires today
Where is the IAT located, and is there an intercooler? Cause, man, that IAT climbs at about the same rate as RPM.
Are you positive there is no miss on the drivers side? It looks like it might.Quote:
Originally Posted by NRunkle
And the IAT is pretty crazy high.. is there a intercooler on this at all?
Nothing on the inlet side sucking shut? No blockages? Didn't leave packing stuff in the intercooler?
Airflow is really low on this.. It really does look like its making crap power.
Yes it has a big front mount intercooler.. cylinder 3 coil had a cracked housing maybe thats my miss? and it does have a autozone special air filter on it.. I am using the iat built into the maf, its mounted about 6in from the throttle body, in straight section of intercooler piping
The IAT is a pretty good indication something isn't right somewhere. I'd check it for blockages. I had a customer not to long ago find shipping packing material in his intercooler.
Log in this thread shows what an intercooler restriction looks like really clearly, I didn't see this happening in yours.