conedodger

Will do @Captain Obvious, I am researching with the Haltech site on that. It is 'monitored' by the Haltech guys, but most often they don't do the answering of questions. Because of that, you don't know what you're getting. After all, there are far more experts on the internet than there are in the world by about 5 times! What I could use now, is a 2D file of the inlet side of the '75 intake manifold. The reason I need it, is because I feel I'm going to have to make an adapter to mate whatever Electronic Throttle Body to the factory manifold. My son, who is an architecture student graduating in May of next year has told me he can make me a working drawing that I can send to my friend Larry who is a CAD Machinist to make 2-3 adapters. (I can't be the only one who wants DBW right?)

Will do @Captain Obvious, I am researching with the Haltech site on that. It is 'monitored' by the Haltech guys, but most often they don't do the answering of questions. Because of that, you don't know what you're getting. After all, there are far more experts on the internet than there are in the world by about 5 times! What I could use now, is a 2D file of the inlet side of the '75 intake manifold. The reason I need it, is because I feel I'm going to have to make an adapter to mate whatever Electronic Throttle Body to the factory manifold. My son, who is an architecture student graduating in May of next year has told me he can make me a working drawing that I can send to my friend Larry who is a CAD Machinist to make 2-3 adapters. (I can't be the only one who wants DBW right?)

Will do @Captain Obvious, I am researching with the Haltech site on that. It is 'monitored' by the Haltech guys, but most often they don't do the answering of questions. Because of that, you don't know what you're getting. After all, there are far more experts on the internet than there are in the world by about 5 times! What I could use now, is a 2D file of the inlet side of the '75 intake manifold. The reason I need it, is because I feel I'm going to have to make an adapter to mate whatever Electronic Throttle Body to the factory manifold. My son, who is an architecture student graduating in May of next year has told me he can make me a working drawing that I can send to my friend Larry who is a CAD Machinist to make 2-3 adapters. (I can't be the only one who wants DBW right?)

Yup, that's Marty and for $215 + whatever coating you use, you can't beat 50 years of proven performance. I'd have to ask Marty, but I think Datsun asked him to design it and he did manufacture it.

The guy who originally did the Datsun Competition Header is still alive and kicking. He is currently putting a Porsche Cayenne turbo motor in a Porsche 914! He still sells his version of the Datsun Competition Header. It’s pretty cheap too. He doesn’t advertise it since his core business has become Porsche centered. Check out MSDS in LA. Martin Schneider is his name. I bought an extra from him in case my original Datsun Competition Header ever gives up the ghost. I’ve had to repair it once so I’m a bit paranoid I guess.

Here's my thoughts on the larger throttle plate. @duffymahoney is using ITB's and has more throttle plate square CM opening up all at once. I suspect that you're right and there is no advantage and perhaps a downside to too much throttle plate. I have to research more.

Ok, even though I'm retired with the Covid situation, my anesthesia skills are in demand so I do a day or two a week of work at the hospital. The reason that is relevant is that I have not had time to examine the 350Z throttle body to see if I can just redrill it or if I need an adapter plate to make it work. My conclusion? I think I need an adapter plate. And frankly, as long as I have to make an adapter plate, I think I'll just make one that accepts the aftermarket 350Z 75mm ETB's that are out there. I just don't think there is enough meat in the stock 350Z ETB to drill it out for the bolt pattern on our L28 intakes.

LS Fest in Bowling Green

Looks like there is enough to work. I will run it by Rex, a 510 guy and machine shop manager Monday. It looks like it’s aftermarket because all the 350Z ETB’s I’ve seen have “Hitachi Nissan” cast into them. This one, nothing. We can try to make it fit and if we break it, we chuck it!

First of all, thanks to @zKars for the fastener lessons. I was able to get some M8X1.25 by 10mm today to fasten the heat shield to the bottom of the manifold. I'm still probably going to put some heat reflective tape on the bottom of the heat shield but it's mounted up for now. Second, the ETB 350Z came today and it is in really good shape. But... Nothing can be easy with this project so I'll have to fabricate a spacer to put this on the L6 manifold. Oh well... I understand the matching pedal will mount to a vertical firewall so there is that!

Well the funny thing is, I wrote that thread about a year ago, then lost my password and never went back!

larger than M6X1.0, I have an amazing fastener store locally and I now have 100 M6X1.0. I agree @Captain Obvious, they are the most common smaller one. But the heat shield to intake are larger. Maybe M7X1.0?

It’s my thread... https://forums.hybridz.org/topic/130952-drive-by-wire/

By the way, anyone know the size and thread of the little bolts that hold on the under intake heat shield? I suspect M8X1.5?

Spent the day chasing threads in the intake manifold and solving the fuel rail mounting problem. It will work, but I need to pull the upper outer two mounting studs from the manifold and replace them with much longer studs. Like 50mm maybe longer. As you may be able to see, the mounting flange falls well short of reaching the stud. That's why I thought the Protunerz peeps had lost their minds when they told me I maybe have to use spacers. (To their credit, when I contacted them, they got back to me within an hour or two and gave me the idea to use longer studs.) So now, the fuel rail is mocked up using bolts instead of studs as I don't want to put it on the engine yet. I also mounted the heat shield and put the 3M heat tape on the header side for additional heat deflection. On the plus side, I was able to find 50 - 60mm X 1.5 studs at McMaster Carr.

HybridZ...I haven’t been hanging there much. I asked the question last year when I was in the planning stage. Then, lost my password. I checked back yesterday and it’s the top thread in the Haltech EMS section! Credible? We’ll find out!

It would be an interesting sidetrack though!

Oh, by the way. does anyone know of a manufactured block off for the cold start injector holes? God help me, if I have to manufacture one, I'll end up making it into a nitrous port! OH NO!!!

Started dressing up the intake. The Protunerz fuel rail is a beautiful piece but as you can see, the mounting bracket comes up well short of the stud coming out of the head. No problem. I'll remove and replace the stud with a longer one.

Picked one up for $30 plus shipping...

Sorry I wasn't clear @Captain Obvious. What I meant was here, in the classifieds. Because then, I could ask for a measurement. On ebay, no such service available. I will check ebay though...

Before this is over, all of us will know someone. I’m sorry for your loss...

I’m surprised they aren’t commonly available used. I guess a popular mod is to replace the stock one with a 75mm aftermarket one.

Ok, I have a suspect. Turns out, the 350Z DBW throttle body is 70mm with the same bolt pattern as the L6. I have to figure out if the pedal will mount but we have a suspect. Naturally, the pick and pull closest to me doesn't have a 350Z...

Thanks, I hadn't put numbers to it. If I can't find a DBW Throttle body gas pedal combination that will fit, one of my alternative solutions it to put a spacer on the manifold that I can mount to. For some reason, I can't find the online calculator I used to come up with the size TB I need but somewhere between 65 and 75 should feed a 3.0 stroker don't you think?