Added 440cc injectors and the AFR goes from 13 when nearing boost to 10.5 at the full 6 psi. Build complete minus some fine tuning (for now).
DIY Turbocharging and Modifying an Automatic Protege5
- Thread starter MuffinMan06
- Start date
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- Tags
- tune
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- TX
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- 2001 Mazda Protege DX 1.6T
If you don’t mind my asking, what. Tune are you running right now? I’ve been running the split second for a little while now and I keep getting into the 9’s on my afr. Still working on the tune.
Surprisingly I set every box to 10 while pulling 1 degree per psi with the splitsecond kicking in at 0.5 psi and the automatic ecu maintains 10.5-11.5 under boost
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- TX
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- 2001 Mazda Protege DX 1.6T
Nice! I may have to try that after i finish converting the hardlines with an fittings.
Info for y’all regarding the transmission strength. If you have a 2003-2003.5 model year car with the auto, it comes with upgrades such as:
-Single sided frictions
-higher performance friction material
-Single piece bonded pistons
-higher performance torque converter clutch material
-compression seal pump vs old o-ring style
-updated accumulator piston
Shouldn’t slip below 180 lb/ft
-Single sided frictions
-higher performance friction material
-Single piece bonded pistons
-higher performance torque converter clutch material
-compression seal pump vs old o-ring style
-updated accumulator piston
Shouldn’t slip below 180 lb/ft
Also, the metal stator, heavy duty sprag, and lock up clutch can likely be sourced from a ford CD4E torque converter
Picked up a vortex’s FMU because the ecu was freaking tf out after 500 miles since the 440cc injectors cause it to max out the fuel trims.
Sniparsium
Mazda Enjoyer
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- 2003 Mazda Protege5
Which Vortex FMU did you get, 12:01?
I believe mine is 10:1 so I will be going back to stock injectors
Sniparsium
Mazda Enjoyer
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- 2003 Mazda Protege5
Is your MAF and Air Temp sensor in the stock MSP location or is it located right before the throttle body like a regular Protege?
Relocated my maf to right before the Throttlebody and the temp sensor is right after the air filter
Sniparsium
Mazda Enjoyer
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- 2003 Mazda Protege5
Did you have to get a smaller wastegate spring to hit 5 PSI? How are you regulating lower boost than what comes stock on an MSP?
I lengthened the linkage from the actuator to the wastegate. A few rotations is all it takes. Does mean it builds boost slower tho
Sniparsium
Mazda Enjoyer
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- 2003 Mazda Protege5
Hm okay, I was wondering if you did that or swap in for a smaller PSI spring, is boost building consistently still?
Yes it’s still consistent. Stock actuator spring. I’m running lower boost for safety since im in uncharted waters turbocharging with an NA automatic ECU. I need to track its timing behaviors
Sniparsium
Mazda Enjoyer
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- 2003 Mazda Protege5
I saw a kit online that offers a GT28 with it but I am worried about it spooling up too slow.
What RPM do you start building positive boost?
I start building boost at a standstill as soon as I step on the gas. So I’d say about 1900 rpm. The torque converter allows for the engine to load up faster. You shouldn’t have issues spooling a gt28
Sniparsium
Mazda Enjoyer
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- 2003 Mazda Protege5
Damn that's not bad, what RPM do you build max boost at?
I can build max boost at about 2300
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- TX
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- 2001 Mazda Protege DX 1.6T
Since I’m the idiot running 12psi on an auto trans with a gt28,
Low boost is quick, but full boost hits around the 3000 rpm mark and it pulls pretty good.
When driving in 3rd gear and flooring it, boost is pretty much immediate since the car is already cruising in the 3000 range.
Even using 256cc injectors from the 1995 Miatas has been consistent.
(These are just my personal findings)
Also, the upgraded trans is holding up really well and actually putting the power to the ground
Low boost is quick, but full boost hits around the 3000 rpm mark and it pulls pretty good.
When driving in 3rd gear and flooring it, boost is pretty much immediate since the car is already cruising in the 3000 range.
Even using 256cc injectors from the 1995 Miatas has been consistent.
(These are just my personal findings)
Also, the upgraded trans is holding up really well and actually putting the power to the ground
