Keeping ecu, changing engines, calculating fuel needs?
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Keeping ecu, changing engines, calculating fuel needs?
Okay I have my ecu custom programmed for a 2.3L H23 VTEC. I'm thinking about getting an F20B (it's an H22a). And running my ecu until I get my other motor built back up. Here's the complications as I see it
2.3L - 2.0L = 11.5589 % drop in fuel
RC 370cc - 290cc = 21.6% drop in injector capacity
These are both DOHC VTEC engines, so can I make these direct assumptions? What I'm thinking is with the drop in injector size coupled with the drop in fuel needs I would need to increase the fuel pressure to increase fuel delivery by 10% or so at the end. Does this make sense?
Using the injector calculation here: http://www.rceng.com/technical.htm
Leaving the displacement change out of it, I would need to run at a FP of 70.8psi to maintain the same level of delivery as the RC 370cc/min injectors with the 290cc injectors.
Now, if I include the displacement change...11.5589% less fuel needs, a 327.23207 cc/min injector would offset the displacement change at stock fuel pressure (43.5). Right?
So using the new 327 figure, going to a 290cc/min injector would require a FP of 55.39 psi, which sounds good to me!
Does this make any sense, or am I just fishing?
2.3L - 2.0L = 11.5589 % drop in fuel
RC 370cc - 290cc = 21.6% drop in injector capacity
These are both DOHC VTEC engines, so can I make these direct assumptions? What I'm thinking is with the drop in injector size coupled with the drop in fuel needs I would need to increase the fuel pressure to increase fuel delivery by 10% or so at the end. Does this make sense?
Using the injector calculation here: http://www.rceng.com/technical.htm
Leaving the displacement change out of it, I would need to run at a FP of 70.8psi to maintain the same level of delivery as the RC 370cc/min injectors with the 290cc injectors.
Now, if I include the displacement change...11.5589% less fuel needs, a 327.23207 cc/min injector would offset the displacement change at stock fuel pressure (43.5). Right?
So using the new 327 figure, going to a 290cc/min injector would require a FP of 55.39 psi, which sounds good to me!
Does this make any sense, or am I just fishing?
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