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duffymahoney

Duffy's 1/71 Series 1 240z build

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12 hours ago, conedodger said:

When I get closer to install, your thread will be my bible Duffy. I bought this for myself for Christmas to make a little shorter work of stripping the engine compartment.

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Those tools like very neat! Someday I might paint this car, but I would rather not.

 

Thank you for the compliment.  It's been a fun project.  I really like working on the Z.  

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Powder coated pan is in. Wow what a pain to do on my back under the car. I need a lift! 
 

I did just past snug 3x around with a 1/4 ratchet. Hopefully she doesn’t leak. 

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3 hours ago, zztom said:

Did you need to lift engine to install pan  ?

No I didn’t. I have new motor mounts. Maybe that helped? It was tricky. But slid on. 

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15 hours ago, zztom said:

Did you need to lift engine to install pan  ?

There is room but the crankshaft has to be in a certain position so no crank throws are sticking down around the rack and pinion area. 

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My engine builder/ fellow Z nerd has started porting my Prestine e31. That I also vapor blasted. This will be my head for my stroker build. 

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6 hours ago, duffymahoney said:

More porting updates.

How do you keep from grinding out the valve seats and guides or does it not matter because they will be replaced anyway?

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3 hours ago, grannyknot said:

How do you keep from grinding out the valve seats and guides or does it not matter because they will be replaced anyway?

I have no clue, I am not doing the work.  I believe he leaves the seats in, then replaces at the end.  

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3 hours ago, grannyknot said:

Looking at it again I can see he has already removed the valve guides so he can get tight in around the guide hole, smart.

I was too cheap since my guides were good.  I imagine he waits to do the valve job after wards . He can get nice and tight on those seats and if the grinder skips or gets scratched the valve cutters will clean it up. I would also think he put the larger seats in and is blending before doing final valve job. 

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My oer/ SK intake plan is going to be perfect. Basically I’m looking for a clean way to do iac and pcv. I will have a plate machined to cap this faux balance bar. Then tap each runner for 1/4 or 3/8. I love the oer/ Sk linkage.  The IAC and PCV will be done on the bottom out of sight.  

This is what the Sk/ oer intake look like under that cap.  Casting is a little rough for my personal tastes.  

I will use a Bosch 0280140551 IAC.  

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Datsun Spirit valves are in my E31! Next is flow testing. Thanks for all the help Andrew Kazanis

Details:
New guides, bronze guide liners, reamed to size, seats cut, three broken studs removed.

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Here is my flow testing data

Datsun Flow Testing Data.xlsx

 

Duffys E31 Flow Testing 63" Static       15" Static     
63 Degree Shop 45 Intake Valves       36.5Exhaust Valves    
DSI Big Valves                                                                                LIFT       Manometer           CFM                          LIFT   Manometer          CFM
Porting By Andrew Kazanis of Mad Greek 0.05 50 35   0.05 14 35
Date: 2/22/2020 0.1 45.25 60   0.1 13 55
  0.15 41.75 90   0.15 12.1 80
  0.2 36.5 125   0.2 11.5 95
  0.25 33 140   0.25 11 115
  0.3 31 160   0.3 10.7 125
  0.35 27 190   0.35 10.5 130
  0.4 23 220   0.4 10.3 135
  0.45 21.5 235   0.45 10.1 145
  0.5 21 235   0.5 10.1 145
  0.55 21.2 230   0.55 10.1 145
  0.6 27 190   0.6 10 150
               
               
Edited by duffymahoney

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21 minutes ago, duffymahoney said:

Mad Greek Racing's shop.  

Cool

Interesting shop, wood heater with some sort of shelf, cranks, blasting cabinet etc.

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1 minute ago, Patcon said:

Cool

Interesting shop, wood heater with some sort of shelf, cranks, blasting cabinet etc.

He is a Z enthusiast.  Plus a racer, plus a engine builder, plus hobby guy.  Super nice.  

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