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theoretical ?s about dual IPs

The circuits in an ECM aren't really setup or capable of passing much current, I would think anyway.. So with that, all the 'peripherals' connected to it handle the power. It would be an expensive experiment to 'just hook it all up'... BUT it might be just fine on the other hand, from a currant standpoint.

Another thought, for the DB2 crowd, hook up the throttles progressively like dual 4's on a tunnel ram... :D WAMMBAA!
 
ak diesel driver said:
seems like it was a belt but it's been awhile since I watched it too. if a belt was used getting the IP to turn in the right direction make take some doing
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True. There were mech IP's on that tractor.. Maybe he used the ford DB2's? Don't they rotate opposite of ours?
 
If I ever do dual injector pumps, it will be 2 ve pumps from 4cyl cummins. Variable timing, and an easy 450cc available fuel.
It would be a bugger to get tuned correctly. But when finished would be well worth the effort.
 
OK my question to you, Les, is are you thinking of two 8 cylinder IP's or two 4 Cylinder IP's? Just trying to see your vision here.
 
2 8cyl the whole point is more fuel. The reason that I'd stick with the ds4 is money. They're still pretty cheap by comparison to most others and they flow more fuel than the mech stock.
 
Dual mech. IP's sounds like the best way to go with this if your serious about it. Problems I see is the fabrication aspect of things. With enough time and some scrap materials someone with a lathe, Mill and some basic welding equipment could certainly fab up this setup. Timing the pumps would be simple since they turn at 1 : 1 camshaft speed. One would need custom injection lines fabricated (And drawing from the guys doing P-pumped 24valve cummins conversions, who need custom lines fabricated, that alone would probably run around $1000). Not to mention what it would take to fabricate a new intake manifold that would still be functional to squeeze 2 pumps in that small valley... Its a great idea don't get me wrong, but given how cheap all of us are... its not very practical...

Of course, there is always the option of just ditching the DB2 / DS4 injection pumps and running a totally different pump. One could use an IP off of a 3208 or 3408 CAT, which is essentially the "bosch P-pump" people whore over but in a V8 configuration :grin: But sadly your right back to square one with custom fabricating alot of parts and those super expensive fuel lines :mad2:
 
Not sure where you got your figures from but injector lines for a Cummins shouldn't exceed 400$ . An if you look at the twin pumped engine that is out there the pumps are out on the front side of the engine, not in the valley ...
 
littleboy said:
Not sure where you got your figures from but injector lines for a Cummins shouldn't exceed 400$ . An if you look at the twin pumped engine that is out there the pumps are out on the front side of the engine, not in the valley ...
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littleboy,
I know right now that yes they cost around $400 or so as the p-pumped 24 valve conversions have become so popular, however, back when this conversion was just being pioneered, the gentlemen who started this endeavor had to have the high pressure injection lines custom made. Similar to the same aspect when the very first stainless steel 6BT / ISB exhaust manifold came out. When it first hit the market, you could expect to shell out $1000 (or sometimes more if you wanted any additional features added to it). Now, that very same manifold can be found on eBay for around $700 brand new.

Its the initial startup that would hurt. Simply because there is quite a bit of engineering that goes behind building these things.
 
If I was to do it I'd just make my own. No way I'd lay down that kind of cash until I had all the bugs worked out and maybe not even then
 
Can't say I've ever custom made high pressure injection lines before, but kudos to you if you can pull it off. Perhaps you can find a set without the copper coating inside them so you can bend them at home? I'm pretty sure the copper coating is for long term corrosion resistance anyway so who knows, maybe it is doable. Would just have to make sure those lines are all EXACTLY the same length to avoid individual cylinder timing issues. :thumbsup:

This would be pretty cool to see happen here on the forum.
 
BigBlueChevy said:
Can't say I've ever custom made high pressure injection lines before, but kudos to you if you can pull it off. Perhaps you can find a set without the copper coating inside them so you can bend them at home? I'm pretty sure the copper coating is for long term corrosion resistance anyway so who knows, maybe it is doable. Would just have to make sure those lines are all EXACTLY the same length to avoid individual cylinder timing issues. :thumbsup:

This would be pretty cool to see happen here on the forum.
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Perhaps some diesels use coated lines but ours don't. see here http://www.thetruckstop.us/forum/showthread.php?33304-Injector-line-coating. as far as being exactly the same length even ours aren't exactly the same length
 
ak diesel driver said:
Perhaps some diesels use coated lines but ours don't. see here http://www.thetruckstop.us/forum/showthread.php?33304-Injector-line-coating. as far as being exactly the same length even ours aren't exactly the same length
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Les that has to be one of the most educational and interesting things I have read in quite some time. thanks for taking the time to look into that stuff. Hell, maybe this whole "Dual IP" thing isn't really all that far out of reach.

I do know that the big engine OEM's such as CAT and Cummins on there older Pump Line Nozzle setups make sure to mention that all the injections lines are exactly the same length. Thats been something drilled into my head for a while. Who knows, maybe this was something that exisited "way back when", kind of like an old wives tail or something...
 
Why couldn't the pmd send a signal to two DS4 IP's in parallel? Or if one pmd couldn't handle it, the ecm send a parallel signal to two pmds?

Anyone in electronics see why it couldn't work?
 
NVW said:
Why couldn't the pmd send a signal to two DS4 IP's in parallel? Or if one pmd couldn't handle it, the ecm send a parallel signal to two pmds?

Anyone in electronics see why it couldn't work?
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In theory... that should work... Although I've fallen greatly behind in the electronics field, by splitting the signal I'm not sure (since the signal we want is PWM), if it would cut the pulse rate in half or not...
 
So just spitballing here but why not fab up a pump that actually flows? Like a single CP3 and machine an adapter to fit in place of the db2/ds4...? This is just a random idea here and I know absolutely nothing about those setups. I imagine you would need like a one off fuel rail or try to piece together and use the stock ones modified, injectors,and some sort of way to time the injection event electronically... It's just an idea, not sure how retarded or impossible it is lol
Sorry for hijacking the thread here...
 
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