Fuel Accumulator

[Josh S]

Hey guys,

I'm getting ready to tackle a fuel accumulator change for the first time ever during my tenure of ownership (yes, I'm still running k-jet and yes, I know it sucks, as I've been living with a minor hot start issue for the last 10 years) and had a few questions that I'm hoping you could help answer.

First off, I noticed that most of the vendors are currently selling a much smaller unit than what originally came with the car. Unhappy with this, I ordered the accumulator from Summit Racing, who had the full size / OEM style accumulator, Bosch 0438170029, for $114.97 and a free shipping promotion. Others can find the same here:

http://www.summitracing.com/parts/bch-0438170029

I noticed that the vendors sell their accumulators in a kit form, together with an accumulator sock/mounting pad, hoses, and hose clamps. Do I really need to change the hoses when changing the accumulator, or can I reuse what's already there?

Any tips or advice you can offer, I'd greatly appreciate!

Thanks,
--Josh S.
#1798

[Stephen Rice]

My guess is you can reuse the mounting pad as long as it isn't worn thin.  If it is worn thin, you could probably replace it with a small sheet of rubber.  As far as hoses and clamps go, how old are they?  If those hoses are 30+ years old I would definately replace them along with the clamps.  Just remove them and walk into your local parts store.  I'm sure they can sell you a section of high pressure hose that you can cut to fit. 

With our cars being 30+ years old, you should be considering replacing all of your fuel lines anyway. 

-Steve Rice
#16510

[Josh S]

Yeah, the hoses are old, and probably should be replaced. If not this year, it's something that I'll definitely do over the winter hibernation.

[Bill Robertson]

Original K-Jet hoses (other than the accumulator diaphragm failure hose) are fluoroelastometric, which stands up to long term gasoline exposure very well, but the $10,000 question is: how will they hold up to ethanol?

Ethanol is already wreaking havoc on boat and lawn equipment hoses. Will DeLoreans be any different?

Something to think about with 11 high pressure fuel lines in the engine compartment.

Bill.

[Dpi]

That is why we have switched everything over at this point. Modern formulated hoses to fight off changing fuel formulations.

Josh Bengston 

President 

Delorean Performance Industries

433 Munroe Falls Road

Tallmadge Ohio 44278

www.deloreanindustries.com

330-573-4129

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[Josh S]

@Bill and @Josh:

Great info! And good to know that DPI will be a source of quality application specific hoses!

[Bill Robertson]

The ethanol industry is one of the stupidest things our government has ever done. Every single part of the process, from corn to pump, is subsidized (that is why it isn't going away -- everybody has their hands in the pie). Farmers not only have a guaranteed market for their corn, but they get subsidized for growing a mandated crop (and remaining food corn goes up in price due to reduced supply). Ethanol refineries are built with government money, irrespective of their actual need (the only ethanol plant in North Carolina shut down within months of its unveiling, and has lay fallow ever since. The people who built the damn thing had no intention of actually operating it -- they just wanted the construction money). Railroads get subsidized freight rates for moving both corn and ethanol, and and compensation for mandated freight taking capacity away from free market commodities. I wouldn't be surprised if final retailers don't get a kick back as incentive to put the stuff in our fuel.

Pure T madness.

Bill.

[Josh S]

@Bill -

I hear that and couldn't agree with you more on the subject!

[Delorean Performance Industries]

Bill, that was  your best rant to date. Well done. If only we could do something about this.

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Josh Bengston

President

Delorean Performance Industries

433 Munroe Falls Road

Tallmadge Ohio 44278

330 573 4129

[Brian Jakes]

Don’t forget that it drives up the cost of beef as well.

 

Brian

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[Bill Robertson]

Unfortunately I really don't see a way out of this one except total government melt down. Everyone on the supply side is making too much money. Only losers are the consumers.

No one like to pay higher prices at the pump, but let's be honest, that is the only force that has ever affected American behavior. Gasohol hasn't reduced consumption one bit. In fact, given gasohol's lower BTU's, an argument can be made that ethanol has actually increased total gallons purchased.

Same with CAFE requirements. What's largest selling class of vehicles in America? Full size pickup trucks (what's the largest selling single model vehicle of any type for the last quarter century? Ford F-150). Given the freedom to choose their own vehicles, a majority of Americans simply do not choose econoboxes. Never have.

Absolutely no argument can be made for gasohol reducing road congestion -- the biggest challenge facing metropolitan areas for sure.

Everybody loves to point to Brazil's ethanol industry, conveniently overlooking the fact that Brazilian ethanol is made from sugar cane, not corn -- it's an entirely different molecule altogether (and one with far more BTU's). Brazilian fuel consumption patterns are also nothing like our own. Same with vehicle ownership: USA is 3rd in the world with 797 vehicles per 1,000 population, Brazil is 61st with 249 per 1,000. Saying we can have the same ethanol industry as Brazil is like saying we can have the same garment industry as Bangladesh.

Bill.

[dvonk]

since this is an unmoderated forum, id like to take a moment to make this political statement:

the government needs to GTFO of everyone else's business... foreign and domestic.

[Bill Robertson]

Liberals want government out of your bedroom but in your driver's seat. Conservatives want government in your bedroom but out from behind your steering wheel. Ain't nobody happy.

Bill.

[Josh S]

OK - so my accumulator thread on the other forum somehow managed to turn into a 'what's the difference between the OEM sized accumulator and the stubby one currently being offered by Hervey and DMCH' discussion that eventually resulted in me contacting a friend who works for Bosch Automotive to get an official word. Here's what my friend has to say about the two different sized accumulators, for anyone interested:

The smaller accumulator currently being offered by Hervey and DMCH & franchisees was originally engineered and designed for K-Jet applications installed on medium displacement inline 4 cylinder engines, specifically the BMW 1.8L and 2.0L M10 engine, as used on the late '70's / early '80's 318i and 320i.

The OEM sized accumulator currently being offered by DPI and found elsewhere such as Summit Racing, was originally engineered and designed for K-Jet applications installed on small displacement split bank 6 cylinder engines, such as the PRV as used on the DeLorean.

The OEM size is still on the production schedule and hasn't been discontinued as of this posting, however, the size of the production run has been significantly decreased according to what my friend told me, thus causing an increase in wholesale price, as previously mentioned by DPI Josh on the other accumulator thread over on Talk.

While they perform exactly the same function, the larger size has a greater internal volume, thus resulting in the rest pressure being held for a longer period of time.

So, there you have it - straight from a Bosch rep that was good enough to talk to and look this up for me after hours (benefits of being good friends).

I hope that this info helps whoever is interested in this subject.

[Bill Robertson]

One of David Teitelbaum's pat arguments against carburetion is "parts are scarce" (totally incorrect, especially for Autolite/Motorcraft 2100/4100 series). Wonder what he has to say about diminished K-Jet accumulator supply?

Bill.

[Josh S]

I'd probably be interested in going carb if I wasn't planning on building a high performance (400bhp) twin turbo 3.0L engine in the near future.

[Delorean Performance Industries]

Let me know when you are ready for turbo parts Josh. Pistons, rods, new liners all ready to go.

On Tue, Jul 2, 2013 at 4:33 PM, Josh S <schim...@hotmail.com> wrote:

I'd probably be interested in going carb if I wasn't planning on building a high performance (400bhp) twin turbo 3.0L engine in the near future.

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[Josh S]

@Josh -

You'll definitely be getting a lot of business from me in the near future! I would have already been in contact with you about starting that project if it wasn't for the fact that my cat ended up getting sick and needing surgery that set me back about $7,000.

I understand that you've got some 24v heads sitting around too. That's the direction I was leaning until you announced your new Mark IV heads. Still waiting for the specifics on that project, as it may change my plans all together :-)

--Josh S.
#1798

[Delorean Performance Industries]

I'm down to one set of 24v heads left and they are slated for the "DPI PRV MUSEUM" which debuts at DCS-14

Plenty of the new MarkIV heads though. I"m finishing up Josh Schwartz's custom 3.0 turbo engine package now and will post a video when it is on the road here.

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[Josh S]

Sounds good Josh - looking forward to seeing that!

I know that the new hi-per engine packages that you'll be offering are NA, have redesigned heads, a redesigned intake, a proprietary sequential port efi system, an electronically controlled coil pack ignition, 11.3:1 compression, and your current spec exhaust, which will be good for around 296bhp / 250 whp - is that right?

Is that based off a 2.8L platform or a 3.0L platform?

Could that same package be done with say 9.5:1 comp, turbo manifolds, twins at around 12.5 lbs of boost, and water/meth injection?

Also, what's the status of your lsd that's better than the quaife and do you offer an A610 clutch or something better?

I know, that's a lot :-)

--Josh S.
--#1798

[Farrar Hudkins]

Slap a carburetor and a supercharger on that 3.0.

;-)

Farrar

[Bill Robertson]

The last thing DMCToday needs is a fuel delivery turf war....

That said, many newer owners are unfortunately unfamiliar with Darryl Tinnerstet's supercharged Vortec conversion DeLorean:  http://www.delorean-parts.com/delorean-parts-gallery/blwnawy2.jpg
That car was legendary in the online community around the turn of the millennium, but it's relatively unknown now. Curiously one aspect of Darryl's car has survived in the collective consciousness: his air filter poking through the engine cover (necessitated by  supercharger height). I am periodically asked by owners considering carburetion if they will have to cut a similar hole.

Bill.

[Josh S]

OK Bill,

Now you got me thinking about a blow through carb set-up, as it would probably be cheaper and easier to tune than efi. I'll have to look into this some more.

--Josh S.
#1798

[Delorean Performance Industries]

I forgot about this

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