Hi all!

I have just finished rebuilding my 2009 FXT and have gone to get it tuned. I decided to add a substantial list of mods to the car while I had the perfect opportunity to. After getting tuned, I was quite disappointed in how 'quick and punchy' the car felt. Along with this, there is a huge torque dip in my dyno results which my tuner just said was a timing thing that all subys have. I have read my ignition timing with a scan gauge and it seems ok - around 14.5 degrees when accelerating hard through the peak torque RPM. I have a suspicion is is a weak waste gate actuator spring but cannot be sure. I have attached my dyno results below.

The pressure I see on my boost gauge does not reflect what the tuner has given me as I do not really exceed past 15psi when accelerating hard. I have driven it for 1500km now and have tried many things from blocking off the BPV to clamping shut the wastegate but nothing has really made it feel substantially better. I have pressure tested and it is all well.

The main mods I have added:
PW TMIC
VF52 rebuilt
-17cc 100mm Manley pistons (~9:1 CR)
ID1050x injectors
3" TBE
TGV delete
3 port BCS
AEM340 fuel pump




Any help would be greatly appreciated!

 

to get a proper idea you'd have to make some datalogs and then compare them to the ECU tune and see what's going on. if it's not boosting now what the tuner set too it may be worth contacting them to see what they think is going on. Looking at just the graphs - for me the AFR seems a little on the rich side, your timing you won't be able to capture that properly on a scan tool you'd have to log that as it will change at peak torque/peak boost and peak HP - most scan tools won't update fast enough to let you really see what's going on.