1st Gen. Ram - All Topics Discussion for all Dodge Rams prior to 1994. This includes engine, drivetrain and non-drivetrain discussions. Anything prior to 1994 should go in here.

Injector Line Sizes?

Old Feb 10, 2009 | 08:31 AM
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Question Injector Line Sizes?

Does anyone know what the stock/OEM injector high pressure line size and length is? (ID x Length).
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Old Feb 10, 2009 | 09:21 AM
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I don't know the length. But the ID on intercooled engines is 1.85mm and I believe non-intercooled engines are just over 2mm.
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Old Feb 10, 2009 | 09:47 AM
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Mike do you know if there's any advantage of one over the other when applied to my mess?
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Old Feb 10, 2009 | 10:22 AM
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No idea. I'm running a set of non-intercooled lines with a non-intercooled pump on mine right now. Don't know if theres an advantage or not.

I also ran a 14mm H/R with the intercooled lines.
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Old Feb 22, 2010 | 12:47 AM
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Old topic but I have been thinking about this lately.
So intercooled lines are 1.85 mm = .073".
Non intercooled are 2.00 mm = .079" or 17% larger than intercooled.
Custom built 2.14 mm = .084" are 33% larger than intercooled and 13% larger than non intercooled.
Custom built 2.37 mm = .093" are 62% larger than intercooled and 39% larger than intercooled.

Is the original injector line size info correct?
I found one website that lists 1st gen lines as .067" = 1.70 mm.

What does it take to put non intercooled lines on a intercooled pump?
Is there a gain to be realized?
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Old Feb 22, 2010 | 09:17 AM
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From: Kennett Square, PA
I had a similar question regarding non-IC delivery valves on an IC pump. For that matter what about non-IC DV's and lines on an IC pump. Or should I go to oversize lines and non-IC DV's to feed my 6x18's?
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