Marty's Z22SE Rebuild

Marty64

Regular Member
Very bad luck with the engines, have you re used the same oil pump that failed in the first one?
Yes Dewis, same oil pump that i used in first engine.
Why do you say it failed ? it seems to working well. (done few engine rotations with starter and without sparks to prime the pump : i saw the oil on chain normally come).
 
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Marty64

Regular Member
All is refit.
For memory : I let standard engine in place and put Harrop SC 2.9" pulley with a 5.200rpm rev limiter.
I did a power measurement and result is:

VX220 Marty - 12042016 - Std Engine+Harrop+2.9+5200rpm.png


I can push rpm limiter to 5400 and more to try if i don't past 250bhp.
But really don't need more right now ! Soo amazing.
What a massive torque ! I understand now why past 2500rpm i think i'm in a catapult !!
Max inlet temp on my trip was 48° C. I though i would find more heat. In normaly condition inlet temp is 33°C for an external 16°C.
Will do more test and a fuel learning.
 
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Marty64

Regular Member
Fuel learning session done.

This week-end i took the car to test SC installation with very bad conditions : 30°C and a spanish mountain trip !

Obtain some good logs:
a2.bp.blogspot.com__0baM3K2Yqh4_V0ISch3wNZI_AAAAAAAAAqw_ZxLjuZ93a08c54513d5ca9309844b7a3c0aa63.png


At 4847rpm i found IAT 49°C (with 30°C ext) and 10.4 psi.
Max IAT this day was 62°C after some full throttle, in normal condition IAT is 32°C, max boost found : 12psi.

Sadly, after this 200km trip my gear shift are now stiff.
I suspect the heat of tullet exhaust wich have destroyed gearbox cables :mad:
 
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Some news about my project:
Last year, i tried a second rebuild and engine blocked again.

I've open it today and found same problem than first blocked engine on cylinder 1 :


All cylinders are keep in a good state.
I don't understand why crank shaft bearing n°1 are in this state. Too much torque on screws ? Wrong bearing ? Low oil pressure ?
Will take a look tomorrow if this is not a bent connecting rod issue.
 
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Another pics and answers:

A second conrods bearing is damaged:




Do i need a new crankshaft ?


I found that 2 conrods were not installed in same way, is this bad ?


If you read back my project: when engine were rebuilt, when i tighten conrods screw : i couldn't turn it free without a particular strong force on the crankshaft. When i loosed conrods screws : it turn correctly.
What do you think about wrong bearings conrods size ?
I've used ZZP ECOTEC 2.0L/2.4L ROD BEARINGS
https://zzperformance.com/ecotec/engine/ecotec-2-0l-2-4l-rod-bearings.html

Or too much torque on screws ?
Or oil pump fault, how to check the oil pump ?
 
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