[Air Flow Fuel Injection System issues with my Datsun 1977 280 Z]

So, sticking throttle blades once warm are a known problem with ITBs.  Stronger return springs could help.  

[1971 240z ITB install]

2 hours ago, madkaw said:

Looks like the same pistons I run with the dish . Smart man to put arrows on the pistons. You won’t put one in the wrong place like I did - lol. 

That's Andrews work! 

Pistons are eagle, sold by rebello.  

[1971 240z ITB install]

My 3.1 is going back together! 

[2.9 Stroker build....TORQUE MONSTER]

Who told you to do 20 degrees at idle?  What is all in timing?  Like 7k rpms?

[A musician's therapist (The $300 Z)]

Man that looks good! Glad you are happy! You are the first to get the coils up and running outside of myself

[More new heads for the L Series]

I chat with the JMS owner all the time, I will just say that a LY isn't off his list to do potentially.  I am curious on what his from scratch DOHC head will look like. 

 

I tried to talk him into a cost effective DOHC head, but I don't think that is their plan.  

[Joe's 1972 240Z adventure]

If you ever do coilovers again, I would highly suggest having them out of the car for the welder.  He would have been able to do a better/ easier job of it.  

[1971 240z ITB install]

All ITB test fitment is done. Cable mount is perfect, everything is smooth and actuates as good as I hoped. Now time to bolt it down, cut the cable to length and finish some wiring.

I lined up the MZR haltech tuner to help me with my tune. It should be interesting to see how good he can get it, especially with my balance bar design and throttle angle.

Will the snow melt so I can drive it soon? Probably not.

[1971 240z ITB install]

So nice 

[1971 240z ITB install]

I got my cnc intake and some parts back from media tumbling, it looks almost cast.  I am super happy with the finish.  Only issue it now shows finger prints.  

[Should I fuel inject my 3L stroker?]

EFI hardware said 45s are still plenty for my 3.1L.  I got the pro version which is a taper bore, so technically the butteflies are 47mm.  

[1971 240z ITB install]

I finished the injector wiring. I cheated and used an RB harness and just redid a few of the lengths to be perfect. 

[Should I fuel inject my 3L stroker?]

You should try one of my progressive throttle cams first, it might help the street aspect some.  

[1971 240z ITB install]

 

Finally got the linkage sorted on my ITB. This is without an over head bar return spring (I will add tonight). The system is very smooth and returns strongly. Pretty stoked.;

 

[A musician's therapist (The $300 Z)]

18 hours ago, Zetsaz said:

I will take you up on that!

 

Small update: Slowly purchasing little things here and there again. I'm not happy with my LS coils slowly going out and even less happy with my bracket. Granted the placement is better than most i've seen. I REALLY don't like how high up on the valve cover the Protunerz one is. Mine normally goes where one of the heater hoses is, but I'm retaining stock function and moved it.

Between those problems and having to buy new coils soon I chose to upgrade to Nissan coils. Got the bracket from @DuffyMahoney and ordered the Hitachi coils from RockAuto. In a few weeks I'll hopefully get a chance to work on it again.

Sweet! 

[1971 240z ITB install]

ITB update! I got the dog bones/ rods shortened, design and had the cable mount made plus the fuel rail mounts. It’s almost ready to bolt in!

I might try some surface finishing on the cnc intake. I don’t love the look of it.

[New Nismo Twin Cam head?]

Super neat that nissan is doing this. I am curious if they will mass produce them or do a limited run.

[1971 240z ITB install]

I launched my Datsun parts company, for anyone looking.

 

 

 

https://www.m2racing.com/

 

 

 

Thanks! 

[1971 240z ITB install]

2 hours ago, MONZTER said:

In the past when I would bench and smooth out casting lines in parts you would always see the smooth ground areas in contrast to the original casting finish.  What I would do is blast it with a heavy 36 grit aluminum oxide to add even texture on the entire part, then Vapor hone it to brighten it up.  It looks great, almost as if it were originally cast like that.  So something to consider vs just glass bead if you decide to smooth out any of the maching marks and go with a more classic cast look.

Got any pictures? 

[1971 240z ITB install]

1 hour ago, MONZTER said:

Looking good to me, lets see some detail shots of the machining that you are not happy with.  Are you going to bench it down?   Whats your plan for filters?

 

I would send the intake off to a vibratory polisher, then glass bead it heavily, then vapor hone it.  

 

No filters for now, but eventually I will get that figured out. 

[1971 240z ITB install]

Well I got my cnc intake! Honestly surface finish isn’t what I was hoping for. But will be nice with some effort. I think it’s almost too much bling. I might go satin glass bead on the intake. It has pretty heavy machine marks

Balance bar bolted on exactly as I planned, with 6mm banjos. The injector angle looks spot on as well.

Pretty happy with it overall. Next rods need to be shortened and I need to figure out a progressive throttle location on the overhead bar and a cable mount location. Then moving the ecu temp sensor.

 

 

[Long time, No SEZ - (Old Timers SEZ Shootout Roll Call) - just for kicks]

11 hours ago, Derek said:

I really wish things would swing back towards the forums. I can't tell you how many times I know the answer to or could add to a post on FB but I don't since it really has no longevity. I always felt like I was adding to the overall knowledge base when I posted here.  I can go on and on but I really hate it.

100% agree, facebook sucks

[1971 240z ITB install]

13 minutes ago, MONZTER said:

The quality looks great, so good way to do it. The cost of materials in the USA, particularly in California, makes it uncompetitive even compared to other parts of the country. It's likely that the material costs alone here are as high as what you paid for the finished part.  Its why I just make parts for myself anymore.  I have to justify the time and cost with love of doing it as a hobby

 

It's not a stupid expensive chunk of aluminum, setups and cut time is what makes it expensive in the US.  China doesn't seem to charge setup fees.  

[1971 240z ITB install]

13 hours ago, calZ said:

Haha of course, but probably a bargain compared to having it done in the US. 

US quotes were hilarious, to say the least.  

[1971 240z ITB install]

11 minutes ago, calZ said:

Yeah, that makes sense. The middle man has to take his cut. I've had a few small things made for different projects and it always baffles me how cheaply I can get things. I ordered a small part recently, and it was ~$50 shipped to my house via air mail. Someone has to take the order, someone else has to machine it, another person has to package it, and then all the people it takes to get it to my step from China, yet all of them get paid somehow. 

I would not say this was a cheap intake to make:)