STR Prep - ECU and Tuning Discusson
Joined: Oct 2011
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My AP2 is hitting the dyno @ Top Speed in Atlanta on 1/24. I will post the results here.
I am curious if anyone is tuning for race gas? I assume it is legal in STR. Anyone know if there is a real value or have any documented gains in running 100+ octane fuel and tuning for it?
I don't drive my S2000 much except to AutoX so I am trying to weigh the value here.
I am curious if anyone is tuning for race gas? I assume it is legal in STR. Anyone know if there is a real value or have any documented gains in running 100+ octane fuel and tuning for it?
I don't drive my S2000 much except to AutoX so I am trying to weigh the value here.
Fuel has to be pump available. That leaves options like 104 and 110 available in certain places so you can run higher octane but you can't run any o the fancy vp racing or Sunoco fuels. More power can be made with e85 which is legal but to take advantage you would need more injector which is not legal
Rule in question:
Originally Posted by 2011 SCCA Solo Rules
3.6 FUEL
A. Stock and Street Touring category vehicles will use service station pump fuel only. Pump fuel is defined as that which is “Federally approved for use on public highways.” This includes the pump fuel known as E85, but does not allow racing-type fuels which are available at service station pumps.
A. Stock and Street Touring category vehicles will use service station pump fuel only. Pump fuel is defined as that which is “Federally approved for use on public highways.” This includes the pump fuel known as E85, but does not allow racing-type fuels which are available at service station pumps.
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Joined: May 2004
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From: Tucson
I got a reply from Andy Hollis on sccaforums.com regarding the OBD functionality rule. Keep in mind this is an "unofficial" response, not an SCCA endorsed response. I will now send this in for a read by the STAC.
The only addition is regarding OEM unique OBD functionality which would likely eliminate the idea of a stand alone working inside an OEM box.
The only addition is regarding OEM unique OBD functionality which would likely eliminate the idea of a stand alone working inside an OEM box.
Some of us on the S2000 forum (s2ki.com) have been debating the interpretation of the OBD communication port functionality rule. Below is an attempt to clarify. Number 3 below really addresses allowance of a CEL. Thoughts/comments?
I'd personally agree with that, but add in a bit more to #1. The use of "standard" is a reference to "standard part" as defined in 12.4, so any capability the port has when the car is delivered from the factory must remain. So there may be manufacturer-specific functions that can be accessed (as opposed to the generic universal OBDII functions that all universal scanners offer).
But yeah, I agree that the wording does not make any reference to returned data content. So lack of readiness or presence of CELs seems to be compliant with the allowance.
Still, to make the manufacturer-specific stuff work, you pretty much have to have the original OE ecu running, at least in parallel. Which is exactly how a real piggyback works, as opposed to a replacement standalone.
-Andy "not official, just one guy's opinion"
"Any standard OBD communications port functionality must remain."
- An OBDII interface tool can be hooked up through the existing OEM OBDII connector
- The standard OBDII request/response/monitor protocol functions properly regardless of data values
- The data returned by the request/response/monitor functions can be in a pass or fail (valid/invalid) state (allows for CEL)
Originally Posted by Andy Hollis' timestamp='280556' post='280556
I'd personally agree with that, but add in a bit more to #1. The use of "standard" is a reference to "standard part" as defined in 12.4, so any capability the port has when the car is delivered from the factory must remain. So there may be manufacturer-specific functions that can be accessed (as opposed to the generic universal OBDII functions that all universal scanners offer).
But yeah, I agree that the wording does not make any reference to returned data content. So lack of readiness or presence of CELs seems to be compliant with the allowance.
Still, to make the manufacturer-specific stuff work, you pretty much have to have the original OE ecu running, at least in parallel. Which is exactly how a real piggyback works, as opposed to a replacement standalone.
-Andy "not official, just one guy's opinion"
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funny, because that's precisely what is written in the rule, not what it may or may not be intended to mean. The only reason I emphasize this is because regardless of a rule's intent, only what is written in the rule can be enforced.
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As simple as that seems, won't they still need some specific metric or standard to enforce this fairly?
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From: Atlanta
Originally Posted by mLeach' timestamp='1326899571' post='21328131
funny, because that's precisely what is written in the rule, not what it may or may not be intended to mean. The only reason I emphasize this is because regardless of a rule's intent, only what is written in the rule can be enforced.
After all, it's just auto-x.
Joined: Jul 2011
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Originally Posted by Aristoi' timestamp='1325975571' post='21295274
What approach are you using for data logging? I am a noobin ECU tuning and logging but it is not clear what the easiest most efficientway to setup for data logging and tuning. The only thing I have decided onalready and have purchased is an EMU, so that is the only constraint at thispoint.
1) I am not sure if I want to use Greddy software for logging. Any advantagesor limitation on the Greddy software? I am considering the Innovate LM2 setupfor their logworks software, but not sure if this is much better. Any otheroptions I should consider?
2) I know I need a wideband O2 sensor for logging and I know there is apotential to hook it up to the EMU. Is there an advantage to buying one thatcan replace my stock narrowband sensor? I am thinking going PLX for thisreason, but are there other wideband sensors that could be setup to replace mystock O2 sensor? Would this be better to integrate with the EMU? I am not surehow to hook it up with this approach but I will figure it out if this is thebest way to go.
I will eventually make it to be dyno tuned if I can find someone in thenortheast that is good at tuning the EMU. My setup will most likely changethroughout the year and prefer to start with very conservative tuningadjustments and primarily take advantage of vtec lowering and rev limitincrease. I just don't want to buy components and/or software that may or maynot work well together if I knew more in this area. I am afraid that as I gothrough the learning curve I may have approached it differently after spendingmoney and time with trial and error. If anyone could share their experience Iwould appreciate it.
1) I am not sure if I want to use Greddy software for logging. Any advantagesor limitation on the Greddy software? I am considering the Innovate LM2 setupfor their logworks software, but not sure if this is much better. Any otheroptions I should consider?
2) I know I need a wideband O2 sensor for logging and I know there is apotential to hook it up to the EMU. Is there an advantage to buying one thatcan replace my stock narrowband sensor? I am thinking going PLX for thisreason, but are there other wideband sensors that could be setup to replace mystock O2 sensor? Would this be better to integrate with the EMU? I am not surehow to hook it up with this approach but I will figure it out if this is thebest way to go.
I will eventually make it to be dyno tuned if I can find someone in thenortheast that is good at tuning the EMU. My setup will most likely changethroughout the year and prefer to start with very conservative tuningadjustments and primarily take advantage of vtec lowering and rev limitincrease. I just don't want to buy components and/or software that may or maynot work well together if I knew more in this area. I am afraid that as I gothrough the learning curve I may have approached it differently after spendingmoney and time with trial and error. If anyone could share their experience Iwould appreciate it.
I haven't been able to figure out how to get the rev limit feature to work with the S2k setup. Maybe someone else can speak up if they have been able to get this functionality to work. If you have an AP2, I'd recommend getting an AP1 ECU and using the EMU to actually decrease the rev limiter to the RPM you want.
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I have tried to use the rev-limit extend feature and have not been able to make it work. I'm new to the EMU, myself, so it could easily be user error. I have tried both firmware version 2.20 and 2.23, neither act differently with regard to this feature.
I wrote Greddy Tech two lengthy emails asking about features like this and I haven't heard from anyone. This is one aspect of the EMU that is very disappointing - technical support is very non responsive and they will not put you in touch with a tech via phone.
I wrote Greddy Tech two lengthy emails asking about features like this and I haven't heard from anyone. This is one aspect of the EMU that is very disappointing - technical support is very non responsive and they will not put you in touch with a tech via phone.
Joined: Jul 2011
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Originally Posted by NFRad' timestamp='1327100178' post='21337193
So you can't increase the rev limiter on an AP2 ECU using the EMU?
I wrote Greddy Tech two lengthy emails asking about features like this and I haven't heard from anyone. This is one aspect of the EMU that is very disappointing - technical support is very non responsive and they will not put you in touch with a tech via phone.
So not only is this unit not popular amongst the majority of tuners out there, which makes it hard to find a good fairly local tuner who will tune this but Greddy support is possibly non-existent.
I've been able to only find 2 possible tuners "close" to me that apparently tune the EMU. I'm in New York. PTuning down in Virginia and Ballistic up in New Hampshire.
It'd be nice to have some tuning capabilities but I guess I'll just stick with the stock ECU and just enjoy the season. I'll tune the brain behind the wheel instead.
Great info you've provided so far with the EMU
Joined: Jul 2011
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I saw others in this thread post that they pulled the trigger on purchasing an EMU+harness.
Any updates on how's it going in getting it to work reliably?
Which tuner, if any, did you use and where they are located?
What has been successful?
What has giving you a headache?
Thanks
Any updates on how's it going in getting it to work reliably?
Which tuner, if any, did you use and where they are located?
What has been successful?
What has giving you a headache?
Thanks
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From: Frankfort, KY
I just got this email
"Josh Owens,
Your letter has been reviewed by the Solo Events Board. The response will be in an upcoming Fastrack. Your letter details are below:"
Keep a eye our for the responce
"Josh Owens,
Your letter has been reviewed by the Solo Events Board. The response will be in an upcoming Fastrack. Your letter details are below:"
Keep a eye our for the responce