7.3 idi part swap
#1
04-14-2013, 03:14 PM
#2
04-15-2013, 08:31 AM
The bore might fit, but you're trying to cross breeds the wrong way I think. 
IDI's are aroudn 21:1 compression because of the nature of Indirect Injection, whereas the PS is around 18:1. The big difference comes in piston top design. IDI pistions are essentially flat top with a small profile for the pre-cup to expand pressure into (the injector in an IDI motor sprays into a pre-combustion chamber in the head and the gasses expand into the cylinder thus pushing the piston). The PS piston has a bowl in the center of the piston for the injection and combustion event to take place. I do not think you can put an Indirect Injection style piston into a Direct Injection motor and function properly...the injector in the PS will have nowhere to spray, assuming the IDI pistion doen't smash the tip of the injector first. There is also some wristpin differences between the NA IDI, Turbo IDI and PS, but I cannot recall offhand...
You may look into coating the pistions, milling the block and head of your PS to get a slightly higher compression ratio.
---AutoMerged DoublePost---
IDI Piston:
Powerstroke Piston:
IDI's are aroudn 21:1 compression because of the nature of Indirect Injection, whereas the PS is around 18:1. The big difference comes in piston top design. IDI pistions are essentially flat top with a small profile for the pre-cup to expand pressure into (the injector in an IDI motor sprays into a pre-combustion chamber in the head and the gasses expand into the cylinder thus pushing the piston). The PS piston has a bowl in the center of the piston for the injection and combustion event to take place. I do not think you can put an Indirect Injection style piston into a Direct Injection motor and function properly...the injector in the PS will have nowhere to spray, assuming the IDI pistion doen't smash the tip of the injector first. There is also some wristpin differences between the NA IDI, Turbo IDI and PS, but I cannot recall offhand...
You may look into coating the pistions, milling the block and head of your PS to get a slightly higher compression ratio.
---AutoMerged DoublePost---
IDI Piston:
Powerstroke Piston:
Last edited by 93_Fummins; 04-15-2013 at 08:31 AM. Reason: Automerged Doublepost
#3
04-15-2013, 11:36 AM
#4
12-11-2016, 02:54 PM
The bore might fit, but you're trying to cross breeds the wrong way I think. : around nope:
IDI'around 21:1 compression because of the nature of Indirect Injection, whereas the PS is around 18:1. The big difference comes in piston top design. IDI positions are substantially flat top with a small profile for the pre-cup to expand pressure into (the injector in an IDI motor sprays into a pre-combustion chamber in the head, and the gasses expand into the cylinder thus pushing the piston). The PS piston has a bowl in the center of the piston for the injection and combustion event to take place. I do not think you can put an Indirect Injection style piston into a Direct Injection motor and function properly...the injector in the PS will have nowhere to spray, assuming the IDI piston doesn't smash the tip of the nozzle first. There is also some wrist pin differences between the NA IDI, Turbo IDI, and PS, but I cannot recall offhand...
You may look into coating the pistons, milling the block and head of your PS to get a slightly higher compression ratio. :hmm:
---AutoMerged DoublePost---
IDI Piston:
Powerstroke Piston:
IDI'around 21:1 compression because of the nature of Indirect Injection, whereas the PS is around 18:1. The big difference comes in piston top design. IDI positions are substantially flat top with a small profile for the pre-cup to expand pressure into (the injector in an IDI motor sprays into a pre-combustion chamber in the head, and the gasses expand into the cylinder thus pushing the piston). The PS piston has a bowl in the center of the piston for the injection and combustion event to take place. I do not think you can put an Indirect Injection style piston into a Direct Injection motor and function properly...the injector in the PS will have nowhere to spray, assuming the IDI piston doesn't smash the tip of the nozzle first. There is also some wrist pin differences between the NA IDI, Turbo IDI, and PS, but I cannot recall offhand...
You may look into coating the pistons, milling the block and head of your PS to get a slightly higher compression ratio. :hmm:
---AutoMerged DoublePost---
IDI Piston:
Powerstroke Piston:
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