narrowed the behavior down,
for the most part in any normal AP map (93@ stg 1/2 +sf) the car overboosts hard in first, second, third, and sometimes fourth (usually upon initial WOT)
With any LWG map the car reaches target boost in first gear (24-26) and pulls nicely but then underboosts in the rest of the gears, will hold 20psi firmly in 3,4, and 5th at any point in the rpm range... so although its nice in first its slow and unresponsive in the rest of the gears, to the point that the factory tune in those gears pulls much smoother and harder.
not sure if that helps...
I can log with any map if someone can decipher what is happening. just let me know which parameters to log
(posted this in general engine management because im not sure the problem is in anyway related to the AP)
Hey guys, I know the factory tune is crappy and have had lots of the usual overboost or torque limit jerking and what not overfueling crap... needless to say,
my current mods are Buschur cat back, Cobb SF intake, and just reinstalled the AP.
with the ap on a stages 1/2 map (+sf) @ 93/91 I boost spike in first, second, and sometimes third or fourth.
with the stage 2 (+sf) @ 93 LWG I hit 26 psi smoothly in first feels great and then the boost tapers in each gear in third and fourth im only holding 15-20 or so through the 3-6k RPM range.
So reading the map notes (they are the same for all stage 2 maps) it says "with wg boost restrictor pill removed"
would having the boost restrictor pill in cause this overspiking issue or be the reason I dont reach target pressures?
To clarify the car behaved this way with the stock tune and would sometimes throw the ASC! service engine light. but it was usualy not as harsh, it would just feel like randomly durring hard acceleration you would suddenly lose 100HP and then 1000-2000 RPM later you would gain them back. I was hoping the COBB tune would take care of this but is it perhaps related the Boost restrictor pill (with the stg 2 lwg map) or might I have another issue?
thanks all in advance!