Engine Management and Tuning Crome, NepTune, Hondata, AEM, MOTEC

Basic tuning question

Old Sep 3, 2012 | 12:13 PM
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Default Basic tuning question

Hi there,

On most of these programs, how do you account for different injector output?

Example: The RDX injector is rated at 410 cc/hr at 38 psi, but actually will put out 510 cc/hr at 58 psi.

So, if I wanted to run the injector at 58 psi, do I have to tell the program that injector size is actually 510 cc? Are there any other things I need to adjust?

Thanks.
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Old Sep 3, 2012 | 03:51 PM
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Default Re: Basic tuning question

What software are you tuning with?
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Old Sep 3, 2012 | 04:37 PM
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Default Re: Basic tuning question

Currently EPROM, but I am also considering the AEM EMS, Series 2.
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Old Sep 3, 2012 | 06:39 PM
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Default Re: Basic tuning question

crome, neptune, ectune?
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Old Sep 4, 2012 | 01:16 AM
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Default Re: Basic tuning question

Crome.
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Old Sep 4, 2012 | 05:30 AM
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Default Re: Basic tuning question

You simply enter your injector size or flow rating when setting your initial fuel multiplier.
You will then tune the fuel tables from there.
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Old Sep 4, 2012 | 02:28 PM
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Default Re: Basic tuning question

So, in my example, I would input it as 510 cc?
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Old Sep 4, 2012 | 03:24 PM
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Default Re: Basic tuning question

Yes leave old injector at 240 and new injector at 510

Or

Take the entire fuel map and multiply it by .5 essentially...same thing
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Old Sep 4, 2012 | 05:29 PM
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Default Re: Basic tuning question

Originally Posted by xenocron
Yes leave old injector at 240 and new injector at 510

Or

Take the entire fuel map and multiply it by .5 essentially...same thing
Not entirely, I believe injector size also compensates for cold start tables and cranking fuel.
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Old Sep 6, 2012 | 05:21 AM
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Default Re: Basic tuning question

Originally Posted by sicones
Not entirely, I believe injector size also compensates for cold start tables and cranking fuel.
You believe, but do you KNOW
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Old Sep 6, 2012 | 06:06 AM
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Default Re: Basic tuning question

Ok for S300 I KNOW it does.
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Old Sep 6, 2012 | 07:27 AM
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Default Re: Basic tuning question

For Crome it does not...unless you use "Fuel Tools"
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