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2" ARH headers with high flow cats & Corsa valved mufflers
DSX Flex Sensor
DSX low side fuel pump
Cordes HX
Big 3 expansion Tank
Brisk Silver Plugs (one step colder)
Granatelli 0 Ohm wires
What ive experienced. It seems like that after every round of mods from the place ive had it tuned it seems to need subsequent tunes. Here are some of the reasons why, the drivability wasn't good and they were able to improve it. Now with this recent cam swap its surging more and needs to go back yet again. When I had the headers installed I had spark blowout. Now after just installing the whipple it had spark blow out again. ive got that fixed but now its running rich. in all fairness it was tuned on E60 when I was able to find E70 by my house.
My question is does everyone experience this with tuning? Do you need subsequent tuning / revisions. Do you stick with one tuner? Do you use HP tuners for remote tuning / is there any value in picking one up for data logging?
Stick with one COMPETENT tuner. I don't know why you wouldn't expect to need to be retuned after adding/changing your cars setup, but that tuner should be able to get it right.
Yeah, anything that affects airflow will need custom tuning to optimize the gains, or in the case of a cam swap, to get the timing and fueling dialed in with the new cam timing.
Often best to try to do it all at once so you don't have to retune for each mod, but that's not always feasible.
I'm always reminding my buddies about this...
"Hey, I'm gonna buy these new headers for $500 and add $30 HP"
'Don't forget the $300 to tune them to see those gains'
"I can get a cam for $200 and swap it myself for 60 HP"
'then you have to pay someone a few hundred to spend hours with it on the dyno or street to make it behave'