What's the deal with the new HPTuners dry nitrous enrichment feature...
#1
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What's the deal with the new HPTuners dry nitrous enrichment feature...
Someone was telling me about a new feature on HPTuners that will allow one to spray dry nitrous AFTER the MAF and when the nitrous engages it sends a signal to the PCM to compensate for the nitrous by enriching with fuel (after tuning, of course).
I didn't see anything about it on HPTuners' site (I could be blind though).
I didn't see anything about it on HPTuners' site (I could be blind though).
#2
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That's cool. I know EFI Live has had that feature, but it's great to know HPT is offering it too. The way I understand it, upon triggering the nitrous solenoid, the PCM increases injector pulse width based on the size dry shot you're running. Just the ticket for the speed density crowd (like me)
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#4
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Originally Posted by Hennytime
o wow thats awesome, but i feel it kinda defeats the purpose of a dry kit, this way you need bigger injectors and pump instead of getting the wet kit and just a pump
The purpose of a dry kit is to use the engine's existing fuel system to provide the fuel (and keep it out of the intake at the same time)
The nitrous fuel enrichment simply uses straight user-entered fuel values instead of relying on the MAF sensor and existing calibrations to add the proper amount of fuel.
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Originally Posted by 98Z28CobraKiller
Can anyone verify from HPTuners?
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I am running a dry system how does this dry enrichment feature work?
I got EFI Scan to play with (holding off on the Tuning software til I see I can read and understand the logs), the OS for the Nitrous specific Timing tables as Black described is interesting to say the least.
I am thinking you can run the Valet PCM wire to the hot side of the Nitrous relay (it needs a grounded to be active), when the nitrous relay activates it will ground the PCM "Valet" Mode and cause the Nitrous specific timing tables to be used...no toggle switch required
Seems for my two stage system I can use the Dry enrichement for small shot and keep NA timing, and when I bump up to the dry/wet combined the valet mode will adjust the timing for the bigger hit?
I got EFI Scan to play with (holding off on the Tuning software til I see I can read and understand the logs), the OS for the Nitrous specific Timing tables as Black described is interesting to say the least.
I am thinking you can run the Valet PCM wire to the hot side of the Nitrous relay (it needs a grounded to be active), when the nitrous relay activates it will ground the PCM "Valet" Mode and cause the Nitrous specific timing tables to be used...no toggle switch required
Seems for my two stage system I can use the Dry enrichement for small shot and keep NA timing, and when I bump up to the dry/wet combined the valet mode will adjust the timing for the bigger hit?
#9
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Originally Posted by Beer99C5
I am running a dry system how does this dry enrichment feature work?
I got EFI Scan to play with (holding off on the Tuning software til I see I can read and understand the logs), the OS for the Nitrous specific Timing tables as Black described is interesting to say the least.
I am thinking you can run the Valet PCM wire to the hot side of the Nitrous relay (it needs a grounded to be active), when the nitrous relay activates it will ground the PCM "Valet" Mode and cause the Nitrous specific timing tables to be used...no toggle switch required
Seems for my two stage system I can use the Dry enrichement for small shot and keep NA timing, and when I bump up to the dry/wet combined the valet mode will adjust the timing for the bigger hit?
I got EFI Scan to play with (holding off on the Tuning software til I see I can read and understand the logs), the OS for the Nitrous specific Timing tables as Black described is interesting to say the least.
I am thinking you can run the Valet PCM wire to the hot side of the Nitrous relay (it needs a grounded to be active), when the nitrous relay activates it will ground the PCM "Valet" Mode and cause the Nitrous specific timing tables to be used...no toggle switch required
Seems for my two stage system I can use the Dry enrichement for small shot and keep NA timing, and when I bump up to the dry/wet combined the valet mode will adjust the timing for the bigger hit?
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HPTuners does not have a "feature" like that. It can however, tune your car with IAT vs. Advance/AF Multiplier and other tables so that when the dry nitrous is seen by the IAT it alters the advance and fueling accordingly. There are other ways to achieve the same results, using a ECT TT etc. But as far as clicking on a tab and loading it etc, no there is no such feature. EFI is now using the basis of a TT to achieve their "nitrous tune." That is, the solenoid activation (or arming for those overly worried the electrons aren't fast enough) wire signals the PCM that there 'X' parameter met and reverts to the "nitrous tune" which is nothing more than fueling and advance vs. 'X'. Quite simple and been in use with nearly any, to include Edit and Diablo, tuning software.
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Oh yeah, as per my above post, you need to use a 01-02 OS. Simple solutions, re-write entire PCM to an 02, flash it, tune it and be happy. Same thing as EFI is doing, they just have the convenience of running a wire for a signal, and calling it "new". No offense Chad, but thats all its really doing. I messed with the same thing after reading about the IAT tricker and applied it with Diablo Predator, with the help of James runninwiththedevil back when Jose was writing his tunes, damn that seems like forever ago.
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Allen...my mistake. It is the new EFI live that has that feature. I knew I read it here somewhere. heres the link
https://ls1tech.com/forums/nitrous-oxide/534936-efilive-custom-nitrous-tuning.html
https://ls1tech.com/forums/nitrous-oxide/534936-efilive-custom-nitrous-tuning.html
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Originally Posted by Beer99C5
I am thinking you can run the Valet PCM wire to the hot side of the Nitrous relay (it needs a grounded to be active), when the nitrous relay activates it will ground the PCM "Valet" Mode and cause the Nitrous specific timing tables to be used...no toggle switch required
#15
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Originally Posted by pianoprodigy
This sounds pretty promising. Any input on this possibility?
#16
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HP Tuners does have something similar coming. It's in beta right now. A whole new system, which is more pricy, but can do a lot more. Two tunes in one is nothing new, and we have been doing it with HPT for a couple years concerning fueling and timing. EFI is now offering a different approach to meet the same end.
Robert
Robert