Duffy's 1/71 Series 1 240z build

[duffymahoney]

Something fun I have been working on! I really want drive by wire on my 240z. But figuring out a location for the actuator has been tough to say the least. I don’t want it hanging over the intake. 

This is a 100% bolt in adapter featuring a BMW 6 cylinder actuator and a 350z pedal. This will attach to stock linkage and drive my ITBs. Hopefully it works! The pivot arcs a far bit, so that might not work and the pedal mount might flex too much? Time will tell. 

This would allow me modern cold starts, any sort of progressive pedal movement I could want. Full idle control, traction control, valet mode, cruise control and way easier tuning. 

We 3D scanned the pedal area and the actuator to mock it all up in CAD! 

All of this is 5axis cut out of 6061.

[grannyknot]

I was very impressed with that same throttle by wire system BMW used on the S54 M engine, I had to reluctantly install it when I couldn't find anyway to delete it from the programming.  I couldn't believe the pedal feel would be as good as mechanical linkage but was pleased to be proved wrong. 

[duffymahoney]

Well it works. But the firewall flexes too much (1-2mm)  

 

, next I will try to mount to the pedal box which doesn’t flex at all. I also want to keep the arm movement on the same plane. Currently actuator is up and down and bell crank is left to right.

[duffymahoney]

New ITB intake is getting sent off to China to CNC cut! This fixes a few mistakes on the first version and also gives me the stock J-hook pivot as an option. It will feature a bolt on banjo balance bar and ideal injector angles. It's slightly longer then the last version as well.

[duffymahoney]

Here is the length. 

[duffymahoney]

Wow is all I can say

[duffymahoney]

Well drive by linkage is fast and accurate. Pretty darn stoked. I might try a few more actuators. Since the one I picked is being discontinued (BMW S54 13627840537)

This should make anyone doing ITBs life much easier. Cold starts, traction, AC, intelligent throttle curves.

This is just hooking it straight to a 12v source. So it’s just on or off. Actually when wired to the ecu, closing will be faster. This is returning via springs. When hooked up to the ecu. It’s powered open and closed.

 

 

[duffymahoney]

So fast! 

 

[duffymahoney]

Dual L6 knock sensors using the stock block m6 hot water pipe mounts. They are actually about perfectly placed! 
 

These are just ti prototype. I am designing my own and will be adding them to the things I make and sell. 

[conedodger]

What knock sensors are those Duff? Most of my sensors are BMW. I hadn’t considered knock sensors because I didn’t know where to mount them, but you’re right. That’s pretty much the perfect spot.

[duffymahoney]

5 hours ago, conedodger said:

What knock sensors are those Duff? Most of my sensors are BMW. I hadn’t considered knock sensors because I didn’t know where to mount them, but you’re right. That’s pretty much the perfect spot.

Bosch off a BMW.  I ordered the studs already! They are nice and cheap.  

[duffymahoney]

Custom grade 5 titanium studs of my design. I am so tired of installing the old studs and I hate the look of the allen ones. I designed intake, exhaust, my intake balance banjos, knock sensor stud, stack studs and my intake intake/ throttle studs! The flat spots work perfect with a box wrench. I also love the look of a rounded tip on a stud. I think they came out awesome, after testing I will be selling. I bought enough, that they should be fairly cost effective as well.

Edited November 23, 2024 by duffymahoney