Should I run these injectors? (FJ6)

[furgo]

[ivwshane]

FJ6 is the part number as that’s what is printed on the box. Standard motors own website also makes a distinction between FJ6 and FJ634 and it only shows the FJ634 as being compatible.

[furgo]

[SGKent]

Bosch made many injectors that had the same physical appearance. The major difference was the volume. One has to compare the physical mount and the amount of fuel delivered. Just because one physically fits and will work, doesn't mean it has the optimal fuel flow characteristics the engine was designed to work with.
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[raygreenwood]

[ivwshane]

Sgkent, that’s my concern as well. These other injectors all may fit but will they be allowing the engine to work as efficiently as possible?

I went to Napa today to pick up the other injectors that were posted and these injectors are also the same exact ones amazon was selling and that I already received, the FJ6. They do not match the picture at all on the Napa website either.

I’ll try rockauto next who lists the correct part number for my bus, FJ634. For $80 a pop it better be right!
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77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab

[SGKent]

[furgo]

Flow rates and impedance specs for the OEM injectors (Bosch 0 280 150 114) and the SMP FJ6 injectors: https://www.thesamba.com/vw/forum/viewtopic.php?p=8438392#8438392

At the time, I had contacted SMP for the specs, which are not listed in their catalog. I'd suggest doing the same for the FJ634.

[pittwagen]

So are the FJ634 injectors the ones that Bus Depot are selling?

[ivwshane]

[SGKent]

SMP shows the FJ634 as a direct replacement the same as 0 280 150 164 which is 200 cc/min. Their photo catalog does not list the VW bus for that injector but their written catalog does.

The 0 280 150 114 on late bus motors is listed at 190 cc/min. The pressure they are tested at will make a subtle difference. I know that almost all of mine in both sets tested around 189 cc/min at Witch Hunter as I recall. So one might have to adjust the AFM a little to lean the mixture out compared to a stock injector.

https://motorwestperformance.com/fuel-injector-flow-rates-and-specs/
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[ivwshane]

I got the fj634 injectors in. I’m going to re-verify the Napa injectors are indeed wrong.

So the FJ634 matches the body size of the original but they still lack the pintle and have a hole as opposed to a pin nozzle. The base/top of the plastic electrical connection is slightly different than the original which means you have to install the larger injector body seal after installing the injector in the hold down bracket. The included hose is straight and not curved like the FJ6 injector. The FJ634 injector also includes the hose clamp (they all included it) as well as the tip and body seal. Unless I was mistaken and the Napa injector is the same as the FJ634 I’ll be rocking these.

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77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab

[ivwshane]

***update



Now I have to clean up the mess I’ve created:


So I went back to NAPA to double check my original findings. The good news is that the injector I got from rockauto, the FJ634, is similar to the Napa Echlin injector CRB 218532.

The only difference I see is that for an extra $30 per injector you get a straight fuel hose and both body and tip seals.

Sorry for the confusion. Hopefully this helps.

On a side note; the brass ferrules are simply to help keep the hose from expanding or fraying, right? I can use either type, the brass or silver one.
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77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab

[SGKent]

without flow rates fit means nothing. Bosch made maybe 20 different injectors that looked identical but they had different flow rates. It is just like the fact that all injectors since 1991 or thereabouts fit into the rails the same, or spark plugs can have the same thread but be totally different as to heat ranges etc..
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“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin

[ivwshane]

[ivwshane]

Holy f!! Just shoot me now!

So I am finishing up re-hosing the new injectors and adding crimps on them when I get to the forth and final box...and wouldn’t you know it, it’s a freaken different injector than all the rest!!! Wtf?!

So...what did I get in the forth box with the exact same label as the others?

As you can see this has a green electrical connector (although it’s more pastel than the original) and it has a pintle cap along the pin nozzle as opposed to the nozzle with a hole like the other ones.

Can anyone who has purchased the Napa injectors before confirm what theirs looks like (green top and pintle)?
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77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab

[furgo]

Thanks a lot for following up with the pictures and updates. These will be extremely helpful to others in the same situation.

At the time I did this job, I looked at aftermarket injectors but decided to refurbish the original ones instead. I'm still considering getting new injectors at some point. Given that these are only available in the US, knowing what you get from different vendors will at least help me avoid nasty surprises when ordering from oversea.

A few notes:

Assuming that the pictures in the Standard catalog are correct, on this post it would seem they sold you FJ697 injectors instead of the FJ634 ones you ordered.

I'm really confused as to which vendors you ordered from and which injectors you actually got from each. I might not be the only one, so perhaps a summary would help. The last bit I got from this post is that at NAPA you ordered 4x CRB218532 injectors and you actually got 3x FJ6 injectors and 1x CRB218532 injector?

[ivwshane]

Ok here is a summary post of where I got the injector and what injector I got:

First shot was from amazon, the FJ6 for $43. It does not match the body size of the original injectors. No pintle cap, curved hose, clamp, no seals, hole in fuel nozzle.

Next up was the FJ634 from rockauto for around $83 each. The body matched the original injectors. No pintle cap, came with straight hose and clamp as well as both body and nozzle seal. The nozzle had a hole for the fuel.

I then purchased the Echlin brand injector from Napa for about $53. It’s similar to the rockauto FJ634 injector except that it came with a curved hose and no seals.
The Napa one is on the right, unknown older replacement injector is in the middle and the FJ634 is on the left.

Lastly, in one of the boxes I got from Napa was this unknown injector that actually most closely resembles the original Bosch injectors. There were no part numbers on it and it was opened already. It matches the OEM injectors body, pintle cap, pin needle nozzle, and has a close to OEM color green cap. The box it came in looked exactly like the other injectors from Napa.

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77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab

[ivwshane]

I almost forgot about this; I went to a different Napa store to get some moly paste and they only had one compatible injector in stock. It was a Bosch injector! Green top just like the original and with a pintle cap. The only thing is that it had a curved braided hose.
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77 westy 2.0 FI
69 ghia coup 1600dp
70 single cab

[GermanLookT2]

Ordered 4 CRB218532. All came In Napa Echlin boxes with curves hoses (no text on the box note FJ6) So recommendations to buy the Napa injectors are not advisable.
Has anyone run these? Should I return them? I don’t think the effort to rehose them Is worth it unless I am missing something in this thread. Any feedback?

What isn’t clear is that there are lots of positive comments on their build but no evidence they perform equally without the pintel caps as the OEM Bosch
Ones do. I’ve had my originals rebuilt three times now but still
Have strange running issues pop up Intermittently feeling like a fuel performance associated with sticky injectors or poor spray and felt it might be worth a second set to keep on distant road trips (like the one I’m on now)😂