Ingram HP 4th Dimension Fuel Curve - Alfa Romeo Bulletin Board & Forums
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post #1 of 9 (permalink) Old 04-10-2017, 08:32 AM Thread Starter
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Ingram HP 4th Dimension Fuel Curve

From Ingram's website - "Our HP (high performance) Spica Pumps feature a 4th dimension fuel curve in the pump “Logic” section that improves the air/fuel ratio at high rpm."

Does someone know what the 4th dimension is that Ingram mentions? I've heard that they modify the 3d cam on the HP pumps . Is that the 4th dimension that is mentioned or...? I guess the "4th dimension" term is what I'm having a hard time wrapping my head around. I suppose there is also some internal geometry in the pump that could be modified slightly to affect the rack arm travel and the amount of fuel delivered.
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post #2 of 9 (permalink) Old 04-10-2017, 10:44 AM
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I always thought that time was the 4th dimension, at least in physics.

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post #3 of 9 (permalink) Old 04-10-2017, 10:55 AM Thread Starter
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Me too. That is why I asked. Is "4th dimension" just a marketing term he is using? Maybe it is. My understanding was that a modified 3D cam was fit to the HP pump...along with the other typical mods that they provide on a pump rebuild.
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post #4 of 9 (permalink) Old 04-10-2017, 12:09 PM
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This isn't physics. The dimensions here are not length, width, depth and time. Dimensions as used here are just measurements. A modern FI system takes into account way more than four "dimensions": throttle angle, gear, A/F ratio, barometric pressure, RPM, MAP reading, ambient temperature, engine temperature, manifold vacuum/pressure (for turbocharging), etc. etc.

I thought SPICA already took in 4 "dimensions": throttle position, RPM, engine temp. and barometric pressure? I'm not sure what the Ingram HP pump adds.

Chris

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post #5 of 9 (permalink) Old 04-10-2017, 12:55 PM
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Quote:
"dimensions": throttle angle, gear, A/F ratio, barometric pressure, RPM, MAP reading, ambient temperature, engine temperature, manifold vacuum/pressure (for turbocharging), etc. etc.
I would call those parameters or variables.

Ed Prytherch
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post #6 of 9 (permalink) Old 04-10-2017, 05:54 PM
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Sure, the thesaurus list several synonyms.

I'm sure they'd be happy to discuss it with you if you gave them a call. I'm sure someone will come along here that knows though.

As far as just being a marketing term.....maybe....but these things pretty much market themselves. Building a high-performance Spica motor? You pretty much need an Ingram HP pump. Just not a lot of competition in this space.

Last edited by GV27; 04-10-2017 at 06:20 PM.
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post #7 of 9 (permalink) Old 04-17-2017, 12:28 PM
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Or the other spaces for that matter...

The passenger seat is 15 miles an hour faster than the drivers seat.

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post #8 of 9 (permalink) Old 04-17-2017, 12:33 PM
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Quote:
Originally Posted by alfaparticle View Post
I would call those parameters or variables.
Call them what you like, but never forget that the 5th dimension is a singing group ... at least it was in the age of Aquarius.
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post #9 of 9 (permalink) Old 05-08-2017, 08:55 PM
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What was that one that Bruce Willis was a taxi driver in the future? He had an Alfa taxi. 5th Element?

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