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Old 04-07-2013, 11:15 PM   #55
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Quote:
Originally Posted by jetblast View Post
With that we'd be hangin' out in the FRS compression ratio arena.
Or pretty much any other direct injection gas motors...
13:1 is nothing unusual if you have cams though.
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Old 04-08-2013, 01:18 PM   #56
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Quote:
Originally Posted by Golddeenoh View Post
what would go first the cylinder walls or the connecting rods?
Quote:
Originally Posted by fast2882 View Post
maybe piston hit the valve
Doubt either...

Quote:
Originally Posted by fast2882 View Post
maybe piston hit the valve
Possible.. Would def want to clay before starting the car.

A lot of this is repeat from other threads..but seems very feasible:

Quote:
Originally Posted by Viperoni
The (static) CR would be 13:1 if you use Prius (FXE) pistons.
The dynamic CR is apparently 11:1 if you use FXE pistons
The most I may need to change when running 11:1 compression is 91 instead of 87 pump gas, besides some EM. But even then....I run on 87 now...at the supposed static CR of 13:1 or dynamic 11:1.

List of Different Parts:
Crankshaft:
1NZ-FE: 13401-21020
1NZ-FXE: 13401-21040

Cam 1:
1NZ-FE:13502-21031
1NZ-FXE: 13502-21021

Cam 2:
1NZ-FE:13501-21030
1NZ-FXE: 13501-21060

Cam Gear:
1NZ-FE: 13050-21041
1NZ-FXE: 13050-21051)

Rings:
1NZ-FE: 13011-21041
1NZ-FXE: 13011-21100

Pistons:
1NZ-FE: 13101-21070
1NZ-FXE: 13101-21110

Valve Springs:
1NZ-FE: 90905-01049
1NZ-FXE: 90501-23135

List of parts that ARE the same...
Sprocket:
1NZ-FE: 13050-21041
1NZ-FXE: 13050-21041

Timing Chain:
1NZ-FE: 13506-21050
1NZ-FXE: 13506-21050

Rods:
1NZ-FE: 13201-29735
1NZ-FXE: 13201-29735

Bearings: all three SAME
13041-21022-01
13041-21022-02
13041-21022-03

Cylinder Head:
1NZ-FE: 11101-21062
1NZ-FXE: 11101-21062

Engine Block:
1NZ-FE: 11401-29856
1NZ-FXE: 11401-29856

Valves Seals:
1NZ-FE: 90913-02092
1NZ-FXE: 90913-02092

Intake Valves:
1NZ-FE: 13711-21010
1NZ-FXE: 13711-21010

Exhaust Valves:
1NZ-FE: 13715-21010
1NZ-FXE: 13715-21010
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Old 04-08-2013, 03:04 PM   #57
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I can only assume the differences in the crankshaft are due to the differences in the weight of the pistons and the operating speed of the 1NZ-FXE vs. the 1NZ-FE. But all the other differences make sense.
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Old 04-08-2013, 08:28 PM   #58
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Quote:
Originally Posted by Bluevitz-rs View Post
I can only assume the differences in the crankshaft are due to the differences in the weight of the pistons and the operating speed of the 1NZ-FXE vs. the 1NZ-FE. But all the other differences make sense.
I bet it has to do with how the generator attaches to the crank (where the flywheel would normally sit).
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Old 04-08-2013, 08:34 PM   #59
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Yeah, that makes more sense.
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Old 04-09-2013, 12:37 AM   #60
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Quote:
Originally Posted by Flipper_1938 View Post
I bet it has to do with how the generator attaches to the crank (where the flywheel would normally sit).
Good point...
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Old 04-09-2013, 12:23 PM   #61
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I wonder how much a crankshaft would cost so I could compare them. I have a 1NZ-FE one sitting here.
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Old 04-09-2013, 01:10 PM   #62
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so, what should i do then in order to swap the 1nz-fxe piston into my 1nz-fe?
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Old 04-09-2013, 01:14 PM   #63
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what i know is : 1nz-fxe has a greater effective expansion than compression—making it simulated Atkinson cycle, rather than the conventional Otto cycle. That difference makes the cam timing and lift different ( i think ). So, if we use 1nz-fe cam, which mean the ignition timing is more advance than the 1nz-fxe cam, do they still have a clearance between top of the piston and the valve?
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Old 04-09-2013, 02:46 PM   #64
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Quote:
Originally Posted by fast2882 View Post
what i know is : 1nz-fxe has a greater effective expansion than compression—making it simulated Atkinson cycle, rather than the conventional Otto cycle. That difference makes the cam timing and lift different ( i think ). So, if we use 1nz-fe cam, which mean the ignition timing is more advance than the 1nz-fxe cam, do they still have a clearance between top of the piston and the valve?
THAT is still one of the bigger questions... prob best to clay the piston and find out b4 firing it up. Try it at your own risk...

....but I'm sure it would be fine....
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Old 04-10-2013, 03:23 AM   #65
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For those who think that i blewup the engine guess what it running good no problem just got the valve stems replaced to stop oil consume.... since august the engine has run like oem no problems like i said there no modification needed only swap your pistons for the prius one and u are set... i dont have the time to go to the dyno yet but i think the gains are 8whp only the piston the compression is 253 253 260 250 u are thinking that mod for only 8whp well i am trying to find better camshaft with more valve opening duration in order to gain the max hp with the compression.... some people said. To me that the scion xb exhaust cams haver more duration than all the 1nz fe engines
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Old 04-10-2013, 03:29 AM   #66
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The moods in my car are thes 2 1/4 magnaflow freflow 2" catless exhaust pipe thinking of making 2 1/4 downpipe.... echo semi header, ebay cai, 3" velocity apex neo afc and prius pistons....
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Old 04-10-2013, 07:10 AM   #67
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8whp not too bad considering its just a compression bump. That IS about 8% gain (though I do realize you're guessing)
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Old 04-10-2013, 11:19 AM   #68
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Quote:
Originally Posted by nanoss View Post
For those who think that i blewup the engine guess what it running good no problem just got the valve stems replaced to stop oil consume.... since august the engine has run like oem no problems like i said there no modification needed only swap your pistons for the prius one and u are set... i dont have the time to go to the dyno yet but i think the gains are 8whp only the piston the compression is 253 253 260 250 u are thinking that mod for only 8whp well i am trying to find better camshaft with more valve opening duration in order to gain the max hp with the compression.... some people said. To me that the scion xb exhaust cams haver more duration than all the 1nz fe engines. The moods in my car are thes 2 1/4 magnaflow freflow 2" catless exhaust pipe thinking of making 2 1/4 downpipe.... echo semi header, ebay cai, 3" velocity apex neo afc and prius pistons....
Good to hear back from you! Thanks for the follow up.
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Old 04-10-2013, 12:25 PM   #69
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Quote:
Originally Posted by nanoss View Post
For those who think that i blewup the engine guess what it running good no problem just got the valve stems replaced to stop oil consume.... since august the engine has run like oem no problems like i said there no modification needed only swap your pistons for the prius one and u are set... i dont have the time to go to the dyno yet but i think the gains are 8whp only the piston the compression is 253 253 260 250 u are thinking that mod for only 8whp well i am trying to find better camshaft with more valve opening duration in order to gain the max hp with the compression.... some people said. To me that the scion xb exhaust cams haver more duration than all the 1nz fe engines
When VVT kicks in, what does it actually change? Does it do anything for lift or duration? or does it just advance/retard the camshafts?

Would causing the solenoid to fire sooner make the motor think it had more cam?
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Old 04-10-2013, 12:54 PM   #70
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Quote:
Originally Posted by nanoss View Post
i am trying to find better camshaft with more valve opening duration in order to gain the max hp with the compression.... some people said. To me that the scion xb exhaust cams haver more duration than all the 1nz fe engines
Yes, if you don't mind, tell us more about this idea.
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Old 04-10-2013, 01:02 PM   #71
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why don't you try to use higher octane or racing fuel like VP racing, and have your ignition timing and Air fuel ratio retune by piggyback ECU first? i think with this two modification, you'll gain some additional HP and torque
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Old 04-10-2013, 01:03 PM   #72
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for racing camshaft, Jun auto already release a higher lift and timing camshaft, in indonesia, we use these cam when we race.
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