Rescaling Displacement?

I bought a 2003 Cobra. Mods are 2.8 Kennne Bell, 2.5 pull = 22PSI, Long tube headers 3" with x pipe and dump right after. Blower cooler tank in trunk. aftermarket pumps with Kennne bell boost a pump. Not sure if internals was touch but has all ARP bolts. My question is Scaling for displacement. I noticed that my engine size is .00067. I assume that was for the install of the 60lb injectors. ive read tune for this in the past was hard. If HP Tuners allow for recalling injectors couldn't i just put it back to .00144 and input the correct injector data or is there other inputs that wont scale correct?

Where are you seeing 0.00067? I'm seeing 0.00155

It does look like your displacement was scaled by half from stock. Typically when I scale a tune, I cut the MAF transfer, injector low and high slope, breakpoint, and standard air charge(engine displacement) by the scaling percentage. Some say to scale Manifold volume, but that's been touchy for me and did require some change but not by the same percentage. If wanting to change the tune back to an unscaled version, I'd start with those. Maybe some other folks will chime in.

I don't recall of the top of my head what the ecu injector processing limits are in the 03/04 strategies. I can say that on my 2001 (RVAFA) using one of the earlier beta releases when they first had coverage on these, HPT allowed me to input 60lb injector data, but it seemed like they were going static or something and pegging the wideband rich on a pull before I scaled the tune. Scaled the tune by 50%, and fueling was still richer than commanded, but much much closer and was able to dial it in with the maf transfer.

The tune was scaled to overcome the stock 64 lb/min MAF airmass clip. The injector high slope clip is at 60 lb/hr.

HPT has a patch that doubles the MAF transfer to 128 lb/min max. I haven't tried it but since you have 60 lb injectors, in theory, you should able to plug your info without scaling.

If not, scale to 50% everything mentioned above +Borderline Spark & MBT Spark. Manifold Volume is for transient fueling so don't have to mess with that unless tip in fuel issues.

I changed it. I think the scaled it for the injectors back in the day. but hp tuners allow all the parameters. 155 i seen was the 2007 mustang i think. but its .00144 now

0.4652777777777778. Why would someone use this number to scale? .00144x.0.4652777777777778=.00067
Unless its just .00144x.465=0.0006696 and hp tuners rounded up .00067.