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www.ColoradoClassicBroncos.com - View topic - a different EFI accumulator body
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 a different EFI accumulator body 
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Post a different EFI accumulator body
So I had a little bad luck/bad judgement the other night. I kept smelling gas around my truck and tracked it down to a fitting on my accumulator. I pulled it, and retaped the brass fittings with yellow thread tape & some Rectoseal for good measure. I was tightening down one of the fittings and heard a pop. I think the casting was bad, earlier, I had noticed what looked to be a "flaw" in the body, and now it had become a crack.
Image

I did some research, trying to find a good way to replace my broken part. I even thought of buying a new tank w/the internal pump. I'm glad I didn't, because I found a 5.8 GT40 lower the next night, and would have had trouble justifying the money on a tank & the lower in 2 days.

I found the CB.com thread describing modifying a Fram HPK2 oil filter relocation kit to make an accumulator. Looks like what BCBs is doing, and the mounting pattern looked the same as what I've already built into my truck.

http://classicbroncos.com/tech/how-to-b ... or-for-efi

I did a bunch of Googling trying to find the best source for the HPK2, and found Fram's website listed some generic cross reference numbers:
http://www.framcatalog.com/PartDetail.aspx?b=F&pn=HPK2

I thought it was odd that Big A, Carquest, and Hastings listed 2 part numbers. More Googling, and I found a picture of the Hastings part #KF8, it had dual inlets and dual outlets. I went to Carquest yesterday and they had, pn 89764 available in Denver. So this morning I picked it up and this is what it looks like:
Image

Image

Image

Since the extra hole you drill & tap in the HPK2, is just and "extra" inlet, so to speak, I don't think its wrong to assume that I can use the extra inlet on pn 89764, just like the extra line you drill/tap & tie into the return line. Less work & less chance of me screwing something up. Plus the in/outs are flat, giving more clearance for tucking the accumulator up under your truck, out of the way. Instead of using brass elbow fittings, I'll go to the hardware store tomorrow & pick up some straight fittings & a short section of 1/4" pipe to use as a pick up tube inside the filter. Unless someone thinks I could/should attempt to pry the pick up tube from the BCB accumulator and get it installed into my new body. But I think that is just more chance for me to "f" something up and cost me more money.

Image

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"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." – Claire Wolfe
74-AWB 98", ZF5, Atlas4, TGW HP1060 and HP1014 axles, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, York OBA, 4x4x2, custom dash & gauges
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Fri Apr 13, 2012 8:47 pm
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Post Re: a different EFI accumulator body
That went better than I expected!

The pick up tube (and threaded filter adapter) in the BCB accumulator just unscrewed out of the cracked body, and threaded right into the new body. It looks like BCB is soldering a section of tubing to the filter adapter, and could be easily done w/some soft copper tubing, instead of threading it like the CB.com article recommends.
Image

I actually was able to reuse fittings I already had, to configure the ins & outs the way I wanted. I used yellow thread tape, 1-1/2 wraps and then a little Rectoseal thread paste as sealant.
Image

The same filters that fit the BCB accumulator fits this adapter too. My large capacity filter rubbed a little on one of the hose clamps (the one attached to the 90* elbow), but nothing to worry about. And I'm going to replace it with a smaller filter soon.

I primed the system, by disconnecting the HP pump, and letting the LP pump run by grounding the "fuel pump" terminal on the EEC test plug, till I heard fuel pumping back into the tank. Then I reconnected the HP pump, and fired it up.

Look Ma, no leaks!

So here are part numbers I've found:

4 port "oil filter relocation kit"
Carquest #89764, Hastings #KF8, Big A #96764

Large capacity fuel filter-oring OD=2.834"/ID=2.462, Filter OD=4.262", Filter Height=6.605"
Napa #3281, Fram #P4105, Carquest #85281, 86281 (don't know why Fram lists 2 CQ numbers or what the difference is)
http://napaonline.com/Catalog/CatalogIt ... 0331349006

Short fuel filter-oring OD=2.538"/ID=2.224", Filter OD=3.673", Filter Height=3.812"
Napa #3382, Wix#33382, Fram #P6904, Carquest #86382
http://napaonline.com/Catalog/CatalogIt ... 0271563885

Another filter that will work:
Medium fuel filter-oring OD=2.834"/ID=2.462", Filter OD=3.663", Filter Height=5.189"
Napa#3343, Wix #33343
http://napaonline.com/Catalog/CatalogIt ... 0271540164

I compiled these numbers from the Fram & Napa websites, I'm not sure the numbers are exactly right. Please post up if you can update these. I'm going to replace my large cap filter with a shorter filter before summer/wheeling season.

I think I found a much easier way of building an accumulator than the CB.com thread. No drilling/threading of the adapter, and you can probably easily solder a short section of copper tubing to the filter adapter, instead of tapping it & using a 1/4 npt pipe.

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"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." – Claire Wolfe
74-AWB 98", ZF5, Atlas4, TGW HP1060 and HP1014 axles, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, York OBA, 4x4x2, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)


Sat Apr 14, 2012 9:16 pm
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Post Re: a different EFI accumulator body
Good tech, as usual!

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Mon Apr 16, 2012 12:06 pm
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Post Re: a different EFI accumulator body
So, the accumulator you cracked was a BCB product? Not pointing fingers or anything. Just wondering.

What do you suppose the price difference would be between your new accumulator and something off the shelf?

And nice tech!

I was just reading an issue of Peterson's today on my flight and though to myself "this isn't a 4x4 magazine. It's a 40 page advertisement!". Tech like THIS is what should be out there in the 4x4 rags. Not "hey, here's how we installed a lift kit. You know. The same kind of crap you can do in your driveway at home."

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1972 Sport, 302, 3 speed with old school Duff floor shifter, T shift Dana 20 with JB Fab twin stick, 4.11 gears with Trac-loc, Lincoln hydroboost, Chevy disc conversion, WH gas lift gate shock kit, 33" Duratrac tires on slots and about 2.5" of lift, Stroppe installed: bumper braces, dual shocks on all four corners, GM power steering, trans cooler mount, auto shift column, rollbar.

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1972 Sport uncut, 302, C4 with 1974 column , T shift Dana 20, 3.50 gears w/ limited slip, 1966 U13 Roadster kick panel, and factory power steering.

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Mon Apr 16, 2012 5:19 pm
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Post Re: a different EFI accumulator body
I bought the accumulator from a CCB member, I can't remember who, so I don't know what brand it is, but it looks EXACTLY like the one in the pics on BCB's web site (including the brass fittings, hose, and filter). I'd be willing to bet it was a BCB. If so, they are just doing the CB mod to the Fram HPK2 oil filter kit. They are just soldering a piece of tubing to the threaded filter adapter, instead of threading a pipe into the filter adapter, like the CB mod.

The fact that it cracked, is my fault, or who ever cast it. It had nothing to do with anything BCB did to it.

I spent $35.00+tax on the filter base. at Carquest. I'm still getting our bodyshop discount, despite telling them I no longer work there, so I'm getting a good break from retail. I bet if you look on line you'll find a better deal. Since I got it to Gunnison, the next day, with no shipping fees, it made up for any price difference I'd get on line.

The filter lists for $17.77 at Napaonline.com w/my store entered, and they are never cheap.

And what ever you have in brass fittings, and 6" of 1/2 soft copper tubing maybe, $20.00? Probably a bit less.

So, if I had to buy it all, it would have been a little more than $70.00. You could probably do better, with some price shopping. BCB's is $68.99, so mine is not cheaper, but it does add about 1" of clearance. And if you want to DIY, mine is definitely easier, it uses all factory ports, no drilling & tapping.

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"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." – Claire Wolfe
74-AWB 98", ZF5, Atlas4, TGW HP1060 and HP1014 axles, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, York OBA, 4x4x2, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)


Mon Apr 16, 2012 6:48 pm
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Post Re: a different EFI accumulator body
I thought I'd update this.

A few weeks ago while finishing up my new gas tank install, I made some mods to this accumulator, mounting bracket, and replaced the filter with the Wix #33343 filter I listed above as a possible filter option. The filter worked and smaller diameter cleared the 90* fitting I used on the outlet to the HP pump. It rubbed, ever so slightly, when the big filter was screwed on & off.

The size difference between the large filter & #33343
P1010982.JPG


I chopped the top hole off the the mounting pattern of the accumulator (2x 5/16" bolts will hold it on just fine) and moved the mounting bracket up on my frame to put the accumulator as close to the floor as possible. This took full advantage of the flat inlet/outlet design of the accumulator.
cut acumulator.jpg

Before w/large filter
P1010240.JPG

After, w/33343 filter, the filter is just even with the bottom of the frame now. The smaller capacity filter would be well above my frame rails.
P1010990.JPG


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"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." – Claire Wolfe
74-AWB 98", ZF5, Atlas4, TGW HP1060 and HP1014 axles, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, York OBA, 4x4x2, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)


Wed Nov 20, 2013 4:22 pm
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Post Re: a different EFI accumulator body
Nice, I saw a factory setup under a van today, it supported two tanks and return lines.

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Wed Nov 20, 2013 9:20 pm
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Post Re: a different EFI accumulator body
A quick update, due to just another COVID back order situation, the Napa 3382 filter wasn't available.

Fortunately, a resourceful Napa employee did a quick cross reference and handed me a 3393 filter. Fits, seals, and sits higher than my "medium" 3343 filter


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"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." – Claire Wolfe
74-AWB 98", ZF5, Atlas4, TGW HP1060 and HP1014 axles, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, York OBA, 4x4x2, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)


Fri Jun 11, 2021 11:27 pm
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