Duffy's 1/71 Series 1 240z build

[Zpenman]

Excellent craftsmanship!

[SteveE]

Duffy

Please sign me up for a set.

[duffymahoney]

Well I got my prototypes in for my passive cooling on my Efi hardware throttles! These will be between the heat shield and the throttle bodies. Also it will be a nice and clean way to run the return fuel.

[duffymahoney]

I love it when a plan comes together.  This is custom titanium banjos, which will come off my balance bar and hold my heat shield on! 

[Matthew Abate]

Lookin good!

[conedodger]

Duffy,

I want to do the knock sensors but I’m not seeing them on M3. Keep me informed when they’re available?

[conedodger]

NVM, found and ordered. Silly me. I kept looking for new additions at the bottom, not top. 
ordered the knock sensors too… 

[conedodger]

Duffy,

I wonder if there is a way to report oil temp and pressure to the ECU? Have you got a solution for that? 

[duffymahoney]

On 1/16/2025 at 8:17 PM, conedodger said:

Duffy,

I wonder if there is a way to report oil temp and pressure to the ECU? Have you got a solution for that? 

You can get a oil temp sensor, oil pressure is a must sensor for the ecu.  

[duffymahoney]

A little update on my 3.1L! This motor was actually finished 3 years ago, but was tragically in a shop fire. Luckily the engine wasn’t too close to the flames and it was spared. It’s getting close  to finished and then going into my 1971 240z! 

My 3.1L

10.2:1 compression ratio 
88.5mm bore. N42 block. Sonic tested. 

LD crank by marine crankshaft. Crank Off-set grind to 84.6 stroke. Finish rod journals @ 1.8889" 
Thrust Finish 1.27”R & R plugs with threaded plugs Dynamic Balance Ion-Plasma nitride, straighten & micro-Micro polish all journals

E31 head. Port work by Andrew Kazanis
Dsi valves, titanium retainers. Isky springs. 
Bonk cam. I got it in NOS or near new condition prior to porting. 

Rebello JE Eagle pistons and toyota rods 

221 CFM flow at .45-.5 lift. With rougAndrew Kazanis sizes. 

Mine is 88.5x88.5x.25x3.14159x 84.6x6 /1000 = 3122cc 

Thank you Andrew Kazanis for all the help and your magically porting work.

[duffymahoney]

240z hidden drive by wire actuator for my ITB setup. This is design number 4.

This plan utilizes a Efi hardware actuator. The goal is the same length arm to the bell crank and distances from shafts and the rod. So the rod passes through the firewall evenly and doesn’t walk from left to right.

This will mount to the pedal plate and the steering box mounts. So behind the firewall

Prior designs walked too much in the hole and I don’t want that.