Autotune Your Emanage
07-31-2010, 08:39 AM
#22
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Is autotune compatible with using a 5th (or even a 6th) sub-injector to add fuel/aid cooling, for instance with the FFS Coldside 190 WHP kit?
I assume you can't leave the EMB sub-injector map referenced to the TPS, as the TPS is now actually the O2 narrowband signal?
So, can you run both the standard injectors and the additional injectors on the narrowband O2 signal?
I assume you can't leave the EMB sub-injector map referenced to the TPS, as the TPS is now actually the O2 narrowband signal?
So, can you run both the standard injectors and the additional injectors on the narrowband O2 signal?
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07-31-2010, 10:17 AM
#23
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Is autotune compatible with using a 5th (or even a 6th) sub-injector to add fuel/aid cooling, for instance with the FFS Coldside 190 WHP kit?
I assume you can't leave the EMB sub-injector map referenced to the TPS, as the TPS is now actually the O2 narrowband signal?
So, can you run both the standard injectors and the additional injectors on the narrowband O2 signal?
I assume you can't leave the EMB sub-injector map referenced to the TPS, as the TPS is now actually the O2 narrowband signal?
So, can you run both the standard injectors and the additional injectors on the narrowband O2 signal?
If your injectors are on the smallish side, you could map them a little less intense to keep them from going too high on duty cycle and let your fifth injector add that little additional fuel.
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08-01-2010, 06:31 AM
#24
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Thanks for the reply. 
I'm struggling to see how the 5th (and 6th) injector(s) would work as sub-injectors in that scenario, wouldn't they effectively be on the same map as the main injectors, so would be operating under the same conditions?
What I'd ideally like would be for them to come on under set conditions regardless of what the main injectors are dong, say for them to start injecting at above 3,000 rpm when there is positive manifold pressure, increasing gradually as the rpm and pressure rise. This is because I would want the nominal cooling properties of injecting fuel directly into the manifold under boost. If they then bring the AFR down enough for the main injectors to reduce their flow via autotune then all well and good, but that isn't their primary purpose.
Would it be possible to use auto-tune for the main injector map, but use a greddy pressure sensor in the boost port of the EMB and use this as the reference for the sub-injector map?
I think the above should work, as the autotune signal feed is plugged into the main harness and doesn't use the boost harness (where does the autotune pressure feed go - directly into the autotune box of tricks?), but it would be great if you could confirm?
I'm struggling to see how the 5th (and 6th) injector(s) would work as sub-injectors in that scenario, wouldn't they effectively be on the same map as the main injectors, so would be operating under the same conditions?
What I'd ideally like would be for them to come on under set conditions regardless of what the main injectors are dong, say for them to start injecting at above 3,000 rpm when there is positive manifold pressure, increasing gradually as the rpm and pressure rise. This is because I would want the nominal cooling properties of injecting fuel directly into the manifold under boost. If they then bring the AFR down enough for the main injectors to reduce their flow via autotune then all well and good, but that isn't their primary purpose.
Would it be possible to use auto-tune for the main injector map, but use a greddy pressure sensor in the boost port of the EMB and use this as the reference for the sub-injector map?
I think the above should work, as the autotune signal feed is plugged into the main harness and doesn't use the boost harness (where does the autotune pressure feed go - directly into the autotune box of tricks?), but it would be great if you could confirm?
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