RDX Injector at 60psi of fuel pressure? - K20A.org .:. The K Series Source . Honda / Acura K20a k24a Engine Forum
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Old 05-10-2017, 01:32 PM   #1
f20cmx5
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Default RDX Injector at 60psi of fuel pressure?

Did some searching, got a few uncertain answers. From my findings, in kpro I should set the injector cc parameter to 475-500 or so. Can anyone confirm? Running really rich at wot right now, currently have it set to 410cc because thats what ballade sports advertises them as. They're rdx injectors in an s2000 rail on an s2k intake manifold on a k24a2 in a k miata. Thanks in advance for any help
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Old 05-10-2017, 01:47 PM   #2
LotusElise
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Default Re: RDX Injector at 60psi of fuel pressure?

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Originally Posted by f20cmx5 View Post
...in kpro I should set the injector cc parameter to 475-500 or so. Can anyone confirm?
You need to set it to 482 ccm, if stock fuel pressure is considered to 43.5 psi and you increase it to 60 psi.

The calculation formula is: corrected flow = actual flow x (new pressure / actual pressure)^0.5

A simple Bernoulli approach.

Markus
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Old 05-10-2017, 02:55 PM   #3
f20cmx5
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Default Re: RDX Injector at 60psi of fuel pressure?

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Originally Posted by LotusElise
You need to set it to 482 ccm...
Markus, thank you, this helps a lot
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Old 05-11-2017, 03:24 AM   #4
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Default Re: RDX Injector at 60psi of fuel pressure?

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Markus, thank you, this helps a lot
Fine . You are welcome!
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Old 05-13-2017, 07:43 PM   #5
f20cmx5
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Default Re: RDX Injector at 60psi of fuel pressure?

Just as an update for anyone who may need this as a reference, setting the injector cc parameter to 480 fixed many of my problems. Car's running a walbro 255 pump, all 6an line, fpr with vacuum line capped, after the rail, so I'm guessing the stock 06 k24a2 isn't causing the fuel pressure to drop at wot. After taking the advice provided by Markus, the Kpro basemap for "310cc sri/exhaust" was pretty much on target until 7k where it drastically leaned out. I made all the 6700-11000 7-10 high cam tables richer and took 1 degree of timing out of all tables high and low. Did repeat street pulls, everythings near perfect, 3/4-wot a/f's at 12.7-13, almost no knocks after I took out the degree of timing. If anyone wants to take a look at my KAL pm me. Thanks again Markus
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Old 05-14-2017, 09:59 AM   #6
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Default Re: RDX Injector at 60psi of fuel pressure?

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...If anyone wants to take a look at my KAL pm me. Thanks again Markus
PM'd you
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