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duffymahoney

Duffy's 1/71 Series 1 240z build

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Injectors are wired. I can’t tell if that was fun or not. But I’m proud of how it turned out. Matches my coils pretty darn well.

Now the easy stuff is left. Hopefully I will get that all done tomorrow. 

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Agreed.

I love the dichotomy of the one old style braided jacket hose still in there with all that new stuff. Highlights the "resto-mod" style of the build.

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I read back a few pages but couldn't see any mention of a heat shield, are you going without one?  A shame to hide those beautiful headers though, this would be a perfect application for Scotty's transparent aluminum.

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2 hours ago, grannyknot said:

I read back a few pages but couldn't see any mention of a heat shield, are you going without one?  A shame to hide those beautiful headers though, this would be a perfect application for Scotty's transparent aluminum.

No I will not use a heat shield.  I have a ceramic coated header, hopefully it's enough, the engine bay is normally not that hot, I will test and see how the ITB hold up and see how heat soak goes.  

Edited by duffymahoney

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I recently stumbled across this website and really enjoying seeing your build come together. I bought my first 240z in 1988 and sold it in 2005. Since selling it, I moved on with life but never quite got over it. The Z-bug finally got the best of me and now, 14 years later, picked up another 240z a few months ago. I've been considering dropping in a Rebello 3.2 once I save up enough pennies and my initial preference is to go with the triple carb set-up like I had on my first 240z. However, per my conversation with Dave at Rebello, the ITB set-up does have some advantages, but they come at a substantial price increase over carbs. Primary reason I like triples is because of the sound but my understanding is the throttle body set-up produces an equal or similar sound. I'm hoping you can share some videos of your engine running once It's ready or perhaps provide your opinion on the sound effect between both set-ups.

 

Cheers,

Elmo

 

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I sold my tirple Mikunis for a lot a lot of money, I won't come out even, but it will be pretty close.  As far as the wife knows, it will be even:)

 

From the videos the noise they ITB is similar, I think the main difference will be the noise that the accelerator pump gives the car.  That growl.  I would guess that will be gone.  

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First major setback. The return stock hardline is too small and is causing pressure to build up. Lowest I can get is 75psi. 
 

My plan is reuse the 8mm fill line as my new return then run 3/8 new flexible hose from the pump to the fuel rail. Then 5/16 line from the FPR to the 8mm stock line back to the tank. Then Y the 8mm (5/16) hardline to stock 5mm return and the 10mm tank vent. 

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Another option might be to reutilize the evap line as your return line. I’m saying that without rereading the whole thread, but I know you were trying not to change stock configuration. The tank vent line is bigger than the return line and should be sufficient. Then you would have to do something else as far as tank vent

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I don’t think I have an Evap line? I have feed, return and brake lines running to the the rear of the car.  

I’m trying to only do bolt on mods to my 240z that can be removed. I could remove the smaller fuel line and replace with a larger one. That could be a mod down the road  

 

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8 hours ago, duffymahoney said:

I don’t think I have an Evap line? I have feed, return and brake lines running to the the rear of the car.  

I’m trying to only do bolt on mods to my 240z that can be removed. I could remove the smaller fuel line and replace with a larger one. That could be a mod down the road  

 

You have a tank vent line for sure . It goes to the other side of the engine bay to the vent valve . It’s larger then the return line . You could use it for now and do something else to vent the tank - maybe the smaller line could be the vent line. 

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1 hour ago, madkaw said:

You have a tank vent line for sure . It goes to the other side of the engine bay to the vent valve . It’s larger then the return line . You could use it for now and do something else to vent the tank - maybe the smaller line could be the vent line. 

Man that would be cool. I will look harder. I can’t say I have ever seen another line. 
 

I have a series 1. 

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19 minutes ago, duffymahoney said:

Man that would be cool. I will look harder. I can’t say I have ever seen another line. 
 

I have a series 1. 

It goes to the vent box in the rear quarter . You should have 3 lines running along each other under the car . 

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Ok. So that is a 7mm. Which really means 9/32 hose. But I can’t really find a good 9/32 efi hose. So it would be 1/4. Which isn’t big enough for return. But if I T’d the 1/4 to the 3/16 stock return it should be big enough? It wouldn’t take that much more work. Thoughts? 

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So here’s what I did . I guess I slept since then and couldn’t remember , but easy to see with an empty bay. Looks like I used the original supply line as my return since I ran a new 3/8” supply. 

A 1/4” line would be quite a bit bigger and would probably work. 

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I am going to attempt to move my FPR to the drivers side and use it.  That way I am hard lines under the car.  I will T the return from 7mm to 5mm and return via the stock 5mm line and the 7mm vapor vent line.  Then use the 5/16 to feed the ITBs.  Hopefully it works! I bought some 7mm efi fuel hose from belmetric.  So that should give me a good amount more flow.  Hopefully my push lock fittings work with it.  

My FPR mount was waiting to fail, i cut a lot of the strength out.  So I will need to fabricate another and put it in my stock coil spot.  Should end up looking pretty clean and simple.  

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I gave up on mounting the fuel pressure regulator on the engine bay walls, I hated the amount of hoses that crossed over the engine bay.  

I ended up buying a radium -6 direct mount FPR (very nicely made).  Then I had an adapter machined to match the 14mm fittings that the Jenvy fuel rail uses.  I should be able to split both sides of the FPR to my 7mm return and my 5mm return.  I think I came out great.  Very neat design by radium, it can be mounted in any direction.  

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Edited by duffymahoney

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That looks like a nice setup.  If I was building mine today Id probably try it.  Looks adjustable but with vacuum regulation.  Very nice,

Where's the picture of yours?...  Let us dream.

http://www.radiumauto.com/DMR-Direct-Mount-Regulator-P909.aspx

Looks like they sell dampers also.

http://www.radiumauto.com/Fuel-Pulse-Damper-Direct-Mount-Kits-P759.aspx

 

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