airbox replaced with oval filter
bbk 80mm throttle body
zo6 intake mani
255walbro pump
brand new plugs w/ performance wires
EGR system deleate
edelbrock long tube headers
Corvette o2 sensors
3" y pipe
no cats
stock exhaust behind the Y pipe (will receive an E-cutout in the spring)
STOCK ECU tune
its being insisted that others have done similar mods and not needed a tune, i keep insisting the car needs a tune
theres no pertinant codes left in the ECU, the o2 codes and misfire code were taken care of today (original o2’s and a broken plug) the rest is just emmissions system stuff
on a 25-100 roll, the formula beat an ls2 suv by 1.5 cars
brand new corvette o2’s, installed today, lack of hp and backfires ahppened on the test drive afterwards , after the car had a good amount of time to warm up and tuine itself some
it doesn’t need to be tuned, but it should be tuned any time you have a less restriction to the MAS/Maf in this case the oval and TB. doens’t need it i say because my 99 had full exhaust with a lid and ported maf and it hauled the mail pretty well. could’ve done better with tuning. i’d say rock a tune out on it it will extract maybe 15-20 hp at most but it will broaden the powerband by that much more.
You say it feels doggy. Is it an auto? If it is, it might have 2.73s in it, which are not very good at making a car give you that “pull” feeling. I agree totally with what psychopjv said about getting a tune when you start getting into MAF and throttle body modifications. If it isn’t throwing any other codes besides the ones you mentioned, I’d say it should be good to go. Hope that helps.
it is an auto, but when i say its doggy, im refering to how it felt previous to the mods, the car felt a good bit more powerfull down low when it was still stock
Headers will remove some of the down low power, but will add in the higher end. My LT1 motor did the same thing when I put Hooker LTs on; the lower rpm was a bit more sloshy, but it pulled harder higher in the RPM band.
It should run fine without a tune. If it doesn’t, something is wrong. At what point did it start running poorly? That may be a good clue. Even new wires can be bad (resistance can be checked), ditto with a new plug (cracked insulator, etc.). Aftermarket MAF’s are often defective. You could have an intake leak due to the new manifold. And so on.
BTW: cats delete is stupid. It makes the car stink/pollute more and doesn’t add anything to a bolt on car. Too late now though.