1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

93 dodge dually

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Old Oct 21, 2009 | 04:10 PM
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Heavy's Avatar
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Default 93 dodge dually

Would 90 hp injectors be to much for a ve bosch pump?Ive already put the 3200 gov spring in turned in the smoke screw and turned the fuel pin in.Also have AFE intake and 4 inch straight pipe.
 
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Old Oct 21, 2009 | 04:16 PM
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From: wy0
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Nope they will be fine. You might want to consider replacing the stock lift pump if you seriously turn up the Injection pump though.
 
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Old Oct 21, 2009 | 07:28 PM
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VE pumps need larger injectors to deliver the same quantity of fuel as a P-pump (or VP pump or common rail) because VE's run lower injection pressures. Lower pressures mean that you need a larger hole to push the same quantity of fuel through.

That's why injectors like 435's (5x.014) can make 600 HP on a P-pump (possible, right?) and 400 HP on a VE pump.

Whatever injectors you get, make sure that they are injectors for the VE pump; P-pump injectors fit in the bores, but the lines won't thread on and the pop pressures will be wrong.
 
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Old Oct 22, 2009 | 12:06 PM
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From: adair ok
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well begle what size would the 90hp injectors be..
if 435 are 5x14s
90 would be what. 5x16? 5x18? bigger . smaller?
 
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Old Oct 22, 2009 | 04:11 PM
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Default injectors

Ok that sounds like a plan,thanks for the advice.SO I should go with a airdog or a fass system probably?
 
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Old Oct 22, 2009 | 05:45 PM
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no probably about it bud you can never go wrong with fuel system upgrades
 
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