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Discussion Starter #1 (Edited)
Alright, I recently decided it was time to upgrade my DB2 to a more performance minded unit, and get the most fuel I can safely get from it. Here recently DieselPro helped me overcome an early engaging governor on my current setup. That said, I contacted him to see if he could help with my new pump, and after several PM's back for trying to establish what it is I expect from it, I sent it to him.
I don't know if you guys have seen the tiny inlet these pumps use, but its really small (I think about 3/16). Thanks to DieselPro's knowledge, he said this could be taken care of by using a Ford DB2 inlet, and he then custom built a hose fitting that has a 1/4" ID, and 5/16 OD. This will allow me to use a lager hose, and I'll be modifying my FFM with a larger fitting. Here are a few pics he sent me of the fitting he made, and the difference between the Chevy, and Ford pump inlets.
Hopefully he'll chime in shortly. Thanks DieselPro.:thumb:
(Some very hard to come by info here)

Matt
 

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Very cool. I have had 3 1982 model pumps in my possession now and each them had a fitting that will allow the use of 3/8 hose :thumb:
The port is larger than the later fittings also. I don't believe it's as big as what your showing though.
 
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Discussion Starter #3
Very cool. I have had 3 1982 model pumps in my possession now and each them had a fitting that will allow the use of 3/8 hose :thumb:
The port is larger than the later fittings also. I don't believe it's as big as what your showing though.
Actually, in my conversations with DieselPro he said he could make a fitting that would allow me the use of 3/8 hose, but said that 5/16 would be plenty big, so I chose this route. I wasn't aware the 82 pumps came with a 3/8 hose fitting on them. You learn something new every day. :thumb: Thanks

Matt
 

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Think the Ford 3/8" used a compression fitting with a "square" O'ring inside of it. The thread type is a little hard to find. The thread is 1/2" x 20, which is the same as a fine thread bolt. Think it is referred to as a SAE straight thread. The Inlet cones are hardened and are not easy to re-thread so this is the best method.

One important note: Stanadyne used different inlet cone configurations to accommodate different inlet screen assemblies. The inside of the cone must have the same configuration to work properly.

I don't purvey this as a HP enhancement. Just a "bigger is better".

Try and find this on the net.
 

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we have been drilling/re-threading ours now for 5 years, we tap the inlet out to 1/4 inch NPT, then drill out a common NPT push-lock fitting to .250" I.D.....
these are only case hardened, so once the initial hardening is breached, they drill/tap easily..... like diesel pro says, its not an HP booster, but it insures all the fuel needed at high RPM.....

now, if we could only get dieselpro to start EDMing head and rotor assemblies out to .370", EDMing the fill and spill ports to make them flow more, and using stanadyne plungers with the part #11102 (from basic group number 11101) .....:thumb::whistle:
 

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Discussion Starter #6
we have been drilling/re-threading ours now for 5 years, we tap the inlet out to 1/4 inch NPT, then drill out a common NPT push-lock fitting to .250" I.D.....
these are only case hardened, so once the initial hardening is breached, they drill/tap easily..... like diesel pro says, its not an HP booster, but it insures all the fuel needed at high RPM.....

now, if we could only get dieselpro to start EDMing head and rotor assemblies out to .370", EDMing the fill and spill ports to make them flow more, and using stanadyne plungers with the part #11102 (from basic group number 11101) .....:thumb::whistle:
Sure wish you guys would use basic English that the slower guys like myself could understand! :HiHi: EDMing? I assume this is some sort of boring/machining procedure?

Matt
 
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Must be the liquor talking. :HiHi: EDM is Electrical Discharge Machining. Where the machine actually removes metal thru an electrical arc... From what I have seen a very Sloooow process. Kinda like when you strike an arc on your favorite wrench on the battery and a chunk of metal is burnt off. EDM is just on a pin point scale. I seen it used to remove broken off taps and bolts in high dollar parts.
 

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Must be the liquor talking. :HiHi: EDM is Electrical Discharge Machining. Where the machine actually removes metal thru an electrical arc... From what I have seen a very Sloooow process. Kinda like when you strike an arc on your favorite wrench on the battery and a chunk of metal is burnt off. EDM is just on a pin point scale. I seen it used to remove broken off taps and bolts in high dollar parts.
Thanks for bringing it down to my level DP. :thumb:

Matt
 

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Hmmm, Ive got some spare pumps around. Time to go junkyarding and find a ford pump and do some frankensteining!!
 

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bowtiebutler: am I trippin or did you like turbonators post twice :whistle: :hehe:
.....and here I was thinking because there are actually two of us he was just liking each of our inputs into that post....:coolnana::thumb:.
 

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.....and here I was thinking because there are actually two of us he was just liking each of our inputs into that post....:coolnana::thumb:.
Thats exactly why I did it! :hehe::thumb: Actually, I don't know how that happened? :think:

Matt
 
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another thing i would be interested to see would be if removal of the transfer pump screen shows an increase in fueling....
 

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another thing i would be interested to see would be if removal of the transfer pump screen shows an increase in fueling....
Fuel inlet size has probably nothing to do with fueling I am quite sure. The filters are the same for higher output pumps so I am quite sure that does not help either. The roller to roller setting is what determines maximum fuel.

If either of the above where a restriction the pump would start to defuel on the test stand at WOT.

If you wanted more than the roller to roller setting was providing you would have just a few choices. Larger pumping plungers, Higher lift camring with R&R turned up, Change delivery value of delivery valve. Switch to the 4 plunger IP

Plungers larger >>> would require the 250hp .330 plungers. Doable-new head $$$
Camring >>> nothing available.
Delivery valve >>> engine would probably slobber fuel at Idle.
 

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respect the DB4 5722....
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Fuel inlet size has probably nothing to do with fueling I am quite sure. The filters are the same for higher output pumps so I am quite sure that does not help either. The roller to roller setting is what determines maximum fuel.

If either of the above where a restriction the pump would start to defuel on the test stand at WOT.

If you wanted more than the roller to roller setting was providing you would have just a few choices. Larger pumping plungers, Higher lift camring with R&R turned up, Change delivery value of delivery valve. Switch to the 4 plunger IP

Plungers larger >>> would require the 250hp .330 plungers. Doable-new head $$$
Camring >>> nothing available.
Delivery valve >>> engine would probably slobber fuel at Idle.
whats the going rate for a.330" [email protected]? last one we had built there was a 2 month waiting list with stanadyne to make it, cost us $1000.00 cash for the fully built pump.... i have heard of cam rings being custom machined, have you ever encountered this?
 

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Never saw a custom camring but I am sure if you had a pocket full of cash you could find a master machinist grind you one out. Probably just need to grind the lead slope out a bit with a trailing slope to match.
Another possibility would be to use an old 5.7 camring. Some of those had radical cam lobes. You would just need to make it work with the cam pin in the DB2 pump you have or convert your pump to some frankenstein advance deal or perhaps a fixed camring.
Never put much thought into it as there would be a lot of what ifs involved.
 

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Never saw a custom camring but I am sure if you had a pocket full of cash you could find a master machinist grind you one out. Probably just need to grind the lead slope out a bit with a trailing slope to match.
Another possibility would be to use an old 5.7 camring. Some of those had radical cam lobes. You would just need to make it work with the cam pin in the DB2 pump you have or convert your pump to some frankenstein advance deal or perhaps a fixed camring.
Never put much thought into it as there would be a lot of what ifs involved.
do you own a 6.2l test truck? i know that there would be a fair demand for this stuff if you were inclined to tinker a bit... wish we were closer, could see us sitting down and having some good discussion and maybe modifying stuff..:idea::Insane:.... it boggles the mind..... when we finally get our lathe and milling machine next summer this is one of the things to look into...
 

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So I am searching for Ford DB2 inlet and I am not having much lucky, unless I buy a complete Ford Db2 IP, can DieselPro or anyone else help out on how to get Inlet? I presume I can then get NTP fitting with o-ring and 3/8 pipe on end?
 

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So I am searching for Ford DB2 inlet and I am not having much lucky, unless I buy a complete Ford Db2 IP, can DieselPro or anyone else help out on how to get Inlet? I presume I can then get NTP fitting with o-ring and 3/8 pipe on end?
:coffee:
http://www.dieselplace.com/forum/63-gm-diesel-engines/21-6-5l-diesel-engine/470-6-5-6-2-high-performance-engine-modifications/684801-using-ford-db2-inlet-gm-db2-pump-2.html#post6762305

if you have access to a drill press, some decent bits, and a good 1/4 tap, you can do your own with minimal effort... buying a ford inlet is the bolt on way, for those that cannot do their own machining....
 

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:coffee:
http://www.dieselplace.com/forum/63-gm-diesel-engines/21-6-5l-diesel-engine/470-6-5-6-2-high-performance-engine-modifications/684801-using-ford-db2-inlet-gm-db2-pump-2.html#post6762305

if you have access to a drill press, some decent bits, and a good 1/4 tap, you can do your own with minimal effort... buying a ford inlet is the bolt on way, for those that cannot do their own machining....
I am thinking that will be the case if I cannot get anything by this weekend :thumb: I do have the tools and ability to do that.
 
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