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Help me tune this log

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droptopgst

20+ Year Contributor
270
1
Oct 1, 2002
Myrtle Beach, South Carolina
RPM Timing TPS
3688 19 99.0
3922 14
4172 12
4410 12
4699 12
4965 12
5215 12
5457 14
5707 16
5938 17
6172 19
6383 19
6590 20
6734 20


Should I add or subtract fuel in the flat spots?
I have 660s 255fp AFPR 50trim with all other supporting mods
 
heres what I have, not sure what else you need.

98 gst spyder 20 psi
pte scm50 trim
afc,
660 injectors
intake,
ATR 3"exhaust,
Type S bov,
Custom 2.5" icp,
man. bc,
high flow cat
afpr,
255fp,
npr intercooler,
ngk plugs (7s) and wires
ARP head bolts
Pocket logger
 
You could be too rich or too lean where you see timing not increase after 4100. While o2 doesnt show alot, it should give you the answer to the rich/lean issue(extremes). Find out which one and add a few % or vice versa until the timing increases steadily. Not perfect tuning but it will get you there.
 
Bank one is the one in front. I think maybe you are misreading your log? maybe? 98 probably means you are too rich, try leaning it up some ( alittle at a time) and see if that will smooth things out.
 
Definately check your wiring on that o2....being right by the exhaust manny provides all sorts of oppurtunities for damage.
 
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