Isnt that ADS chip supposed to advance the timing for u instead of bumping it? myabe thats the problem. I'd ditch that chip and set timing to 14-16* using 93 octane. IMO, you should be seeing 98-99mph trap apeeds as is. Just something for u to compare to, my friend has a 90GT 5spd with just LT headers, H, and flows with 14* timing and went 14.4 @ 97 with a 2.3 60' on 17" street tires with stock 2.73 gears. How fresh is your tune up? Fuel filter clean and installed the right way? Ditch that chip!!
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TFS heads/FTI custom cam/TFS street heat, Longtubes, 373's, MM lca's, Tokico springs/shocks
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