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SteveJ

Don't buy this from Z Car Depot

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So if you are ever thinking about buying the hose that Z Car Depot (@zcardepot.com) lists as being an alternative to the float bowl hose, don't! (https://zcardepot.com/products/carburetor-su-float-bowl-fuel-line-hose-240z?_pos=2&_sid=6edb73ed7&_ss=r)

I used some of that hose on someone's car, and I couldn't figure out why the car wouldn't take load. I went to check the float levels, and this is what I saw when I pulled off the air cleaner.

Kinky Hoses.jpg

Those hoses aren't going to flow much under load. And I did cut them to the same length as OEM hoses.

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I’ve seen kinks and I’ve seen hoses that are so stiff they impede choke motion. OEM stuff is amazing, the 40 year since last started last Z I’ve been playing with, still had soft hoses

I’ve been using the silicon tubing that RC hobby stores sell for the nitrous fuel they use in RC car and airplane engines. Comes in different colors too! Pink is nice. No doubt Z Therapy has some input on this 

Wait I’m Canadian, COLOURS. 

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I bought a few feet of the same stuff from Z Car Depot a few weeks ago.  The rear one seems to have a little bit of collapsing going on, less on the front. I thought I'd try cutting a piece a little longer to fix, maybe not.  Choke seems to retract fine.   Is there an "official" length to use?  Heard a rumor the hoses are still available from Nissan? IMG_6297.JPG

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I dealt with this years ago . Talk about a bitch to figure out why the motor ran bad when it got hot . The hose would collapse under the heat and kink . I can’t remember where I bought it from , but I thought it actually cam from Z Therapy . 
Z car depot sells some stuff that ain’t worth a damn like their gas tank J bolts .

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I've used the ZTherapy hoses. They're super floppy silicone (I think). They don't kink or bind up the nozzles during the choke operation.

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As well as flexibility, it’s important to ensure you have ethanol proof hoses, especially given that they are sitting nicely over the hot manifold!!

I think ordinary silicone is porous and not fuel / oil resistant. Happy to be corrected.

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 Silicone was my guess. That's what they feel and look like. I'm confident that ZTherapy's hoses are compatible with today's gasoline.

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11 minutes ago, siteunseen said:

My local dealership got these overnight not too long ago. 

20201109_110528.jpg

This is good reference though a good point was just brought up.  If these are the same as what they were in the '70s they may not be good for today's fuels with higher ethanol content.  This may be worth researching.

 

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16 minutes ago, siteunseen said:

My local dealership got these overnight not too long ago. 

 

I ordered a set of those from Z Car Depot. As for what @texasz said, when I get my 73 back on the road, it will have almost exclusively ethanol free gas. I am luck to live near a recreational lake, and many gas stations around me have ethanol free in 87 and 90.

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I just stopped by my local Nissan dealer ready to order a couple #16356-25610 tubes.  He told me, with a straight face, $53.76, each!   I think I'll call ZTherapy.  I do like the baked in curve though.

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 I wonder what Courtesy Nissan is asking for them. If it's considerably less, I'd take Courtesy's quote to the manager of that local dealership and tell them you'd rather support local businesses but their pricing policy makes that impossible.

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that might be a good option  ,mine are 23 years old and  I would like to have a spare also .  so  with out pulling mine off to check the id , does anybody know the id of the hose ? thanks

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2 hours ago, Mark Maras said:

I've used the ZTherapy hoses. They're super floppy silicone (I think). They don't kink or bind up the nozzles during the choke operation.

Does ZTherapy hide this product on their site? I don't see it in their master price list or new products.

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1 hour ago, kully 560 said:

that might be a good option  ,mine are 23 years old and  I would like to have a spare also .  so  with out pulling mine off to check the id , does anybody know the id of the hose ? thanks

I measured the outlet of the jet to be about 5.5mm. I ordered a couple of types of 5.5 mm fuel hose from ebay to see if either might be viable. This includes the possibility of creating a jig to heat and mold the hose into shape.

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Might be options outside of the normal Nissan channels.  [mention=32052]AK260[/mention] might know them. https://www.carbuilder.com/us/textile-covered-fuel-hose

https://www.carbuilder.com/us/about-us

 

 

I do indeed use them, Mr Clever Zed Head! They have been brilliant and stock a good range of stuff.

 

If it was me, I would personally do what has been suggested - namely go to Z Therapy for them. The carbs I bought off them 7 years ago have been subjected to some serious under bonnet heat and abuse, yet the rubber lines feel as good as the day I bought them.

 

In the UK we run E95 which 5% ethanol. The SAE30 R6 fuel lines installed by the PO about 12 years ago had started to break down inside and I was getting black fish swimming around in my fuel filter (and fuel smells around the lines). But somehow the ZT supplied rubber lines have survived so far.

 

Off topic - As a matter of interest, for this reason alone, I have now run aluminium fuel lines all the way from the fuel tank to the fuel filter and the return lines, with less than 20cm of rubber fuel lines joining everything. The extra bit in the middle of the photo below is just allowing for a possible future electric pump, if ever required.

 

4b3ad6bb1b0fab76a922d865ad5869a4.plist&key=679ac9e01f4f05ba903e92d7fc64632bbe40f8558457a7da98919c92dd80f4ee

 

 

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2 hours ago, Mark Maras said:

 I wonder what Courtesy Nissan is asking for them. If it's considerably less, I'd take Courtesy's quote to the manager of that local dealership and tell them you'd rather support local businesses but their pricing policy makes that impossible.

In my experience if Courteseynissan.com has them my local guys do too, same price but i pay no shipping.

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You can always buy by brand.  Gates hose seems to address all of the concerns.  Not "period correct" looking of course.  Most of the auto parts stores have Gates.  It even has a name, Barricade.

https://www.gates.com/us/en/fluid-power/engine-hose/fuel-line-hose.p.4219-000000-000002.html

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4 hours ago, SteveJ said:

Does ZTherapy hide this product on their site? I don't see it in their master price list or new products.

 @SteveJI've only purchased them with the rebuild kits in the past. However, item ZT20, fuel line, $8.00 ea., must be the bowl to nozzle line. I can't think of any other fuel line on an SU.

 

4 hours ago, SteveJ said:

I measured the outlet of the jet to be about 5.5mm. I ordered a couple of types of 5.5 mm fuel hose from ebay to see if either might be viable. This includes the possibility of creating a jig to heat and mold the hose into shape.

 I'm sure it's possible to mold a hose to the right shape. The question in my mind is, will the nozzle bind when the shape of the bend changes during the operation of the choke?

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26 minutes ago, Mark Maras said:

 @SteveJI've only purchased them with the rebuild kits in the past. However, item ZT20, fuel line, $8.00 ea., must be the bowl to nozzle line. I can't think of any other fuel line on an SU.

 

 I'm sure it's possible to mold a hose to the right shape. The question in my mind is, will the nozzle bind when the shape of the bend changes during the operation of the choke?

Thanks. I'll make the inquiry.

As far as the other types of hose I'm buying, I am planning on doing some trials on a spare set of carburetors I have to see if the different types have the necessary flexibility as the nozzle moves with the choke.

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6 minutes ago, siteunseen said:

I found my receipt and it was $20.07 in 2018, each. So $53 isn't as crazy as I thought. :facepalm:

 

So 2 years is a 50% increase...

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