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Message: <blockquote data-quote="jEEd" data-source="post: 226020" data-attributes="member: 9552">okay so today at GRCPerformance while everyone was getting pleased with their results... my car ran like SHlT literally...my mods: # PI Swap (H/C/I) '03 Heads/Cams [reconditioned/ valve jobs w/ 12k miles] '04 Intake w/ crossover [15k miles]# Magnaflow X Pipe# Flowmaster CB# JLT CAI# Accufab 75mm TB/Plenumpost tune : 226rwhp 265rwtq (first 2 runs were 222 & 226)after tune: 215rwhp 250rwtq (fixing A/F Ratio to 12.8 and advancing sparkplugs 14*)then after that it just keep getting shittier and shittier... to 210rwhp and 246rwtqso pretty much every time after we started to tune the car... it would keep dyno-ing less and less... and whats odd is that it would dyno like it was an NPI Engine, falling flat on its face after 4800rpm... which i know its not because i did the pi swap myself.# did a dyno run w/o my CAI adaptor and made it a RAI. still same results. (210ish)# checked the filter and then did a dyno run w/o the filter and made the same results(210ish)# MAF sensor was cleaned.. the engine knows its going WOT soo thats accounted for# checked all injectors / sparkplug wires# O2 Sensors were replaced just recently and so were the intake manifold ones.# changed the sparkplugs to NGK V-Power TR55 and gapped to .054 (i had Autolite Platinum before swapping these in) and resulted in the same as all the rest...# then we turned the timing back to stock and kept the A/F and dynoed the same# took out the chip and ran it stock and it ran like it did post tune (210ish)# and we checkd for exhaust leaks and if any wires were arching but nope they were okay.so now i wonder whats wrong with my car? any ideas? no cel pops up, idles fine, not misfiring, firing order seems fine... he knows theres something wrong w/ my car but it was getting late and a whole day of dynotuning. its just bugging me really bad and we wont be able to do more tests on it til monday since the shop is closed sunday. :'( thanks for any help you can give...</blockquote>