Tech Boner, 77 pages of math that will manage my car.

Dudeland

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I am a big data entrepreneur in real life, so this has got me thinking about the data coming from the engine and how its interpretation results in the adjustment to the air valve and the injectors. 

 

I have read the manual.  The first time I was was completely sober, along with the second and third time... the fourth time... not so much.  It seemed to sink in the fourth time around a lot more.  The way that this system allegedly manufactures the digital version of real-life parts of a carburated system is fascinating, like a choke, accelerator pump, the prime you get when you set the choke. It is also interesting how it accommodates physical anomalies in the engine as it warms.

 

I haven't quite got my head around the learning algorithm, and how it can be dialed in, overlays etc...  I think I may need to dust off a big Bordeau that I have been holding onto for the past 15 years and load up on a nice rib steak from my favourite meat shop (no offence to the vegans of which there are a lot in Vancouver) and settle in.

I am about to re-do my heater box, and since the cooling system is open, I think I will drill and tap the housing.  The cooling sensor that comes with it is 3/8 NPT, with adapters to 1/2 inch if needed.

 

A long time ago I got the 11mm manifold bots from Ireland engineering, which I will use when I reinstall the manifold and the coolant diverter. 

 

Pictures to come, but much more likely a video, I have felt that the GoPro in my house has been underutilized. 

Sniper 2BBL EFI Manual.pdf

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Read through it briefly and seems to me that it doesn't let you actually access the raw fueling map, is that correct?  I'm assuming it comes pre-loaded with a base map, and you set your AFR targets, and then it does it's closed loop learning thing to adjust the pre-loaded map to try and hit the targets you put it.  This is all fine and a very straight forward way of doing things, but it would be good if you had a way to get the O2 sensor installed and verify that it's working correctly with your carb before letting the EFI do all of it's tweaking.  In the unlikely event you have a bad or poorly calibrated O2 sensor or something and spits back erroneous AFR numbers, it would make everything run badly and would be very frustrating.  Maybe this isn't feasible in which case you might just need to cross your fingers and try it, but something to think about!

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36 minutes ago, AustrianVespaGuy said:

Read through it briefly and seems to me that it doesn't let you actually access the raw fueling map, is that correct?  I'm assuming it comes pre-loaded with a base map, and you set your AFR targets, and then it does it's closed loop learning thing to adjust the pre-loaded map to try and hit the targets you put it.  This is all fine and a very straight forward way of doing things, but it would be good if you had a way to get the O2 sensor installed and verify that it's working correctly with your carb before letting the EFI do all of it's tweaking.  In the unlikely event you have a bad or poorly calibrated O2 sensor or something and spits back erroneous AFR numbers, it would make everything run badly and would be very frustrating.  Maybe this isn't feasible in which case you might just need to cross your fingers and try it, but something to think about!

 

AustrianVespaGuy,
Actually you are half right.  When initially setting up the unit, and programming it, it will just allow you to pick a target AFR for idle/cruise/wot.  There will not be access to the entire fuel map on the handheld, as it is restricted by space.  The entire fuel table on the small, handheld display just isn't very feasible.  However, with the USB CANBUS dongle he purchased with his Sniper unit, he can access the entire fuel map by downloading our tuning software from our website (which is free), and hooking up with a laptop.  You can even do this with the engine running to make live changes to the tune.  Below, you'll find a link to the free Sniper software.  -Luke @ Holley Tech

https://www.holley.com/support/resources/#Fuel_Injection

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Thanks Holley for jumping on my humble Blog.  And yes my car was/is running the best it ever had.  I have had an AEM in the car since I purchased it, and it does operate well enough to tune the car.  I can see where it is rich, lean and in-between.   What will really help is the data log that the sniper will produce.   I ordered the try-y header from I.E. (or will be once I get the PayPal invoice from Jorge).  I have an old beater of a header where a mechanic had installed the bung for the 02 sensor incorrectly (angled up, so it catches the condensate).  That shortened the life of the sensor and has reciently failed.  I have a new OEM Bosh for the AEM, and the sniper comes with a new sensor which I will only install once the Sniper is in using the clamp on fitting, and eventually the new header. 

 

 

 

 

 

 

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Ah very good info to know, thanks Luke! Being able to 'know' the baseline map in my opinion is very important, both when first setting up a new install and to have as a backup later if something goes sideways. And also good that you'll have some confidence in the O2 sensor, that will give you everything you need to get things running great and keep it that way!

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On 10/19/2018 at 7:53 PM, Dudeland said:

Thanks Holley for jumping on my humble Blog.  And yes my car was/is running the best it ever had.  I have had an AEM in the car since I purchased it, and it does operate well enough to tune the car.  I can see where it is rich, lean and in-between.   What will really help is the data log that the sniper will produce.   I ordered the try-y header from I.E. (or will be once I get the PayPal invoice from Jorge).  I have an old beater of a header where a mechanic had installed the bung for the 02 sensor incorrectly (angled up, so it catches the condensate).  That shortened the life of the sensor and has reciently failed.  I have a new OEM Bosh for the AEM, and the sniper comes with a new sensor which I will only install once the Sniper is in using the clamp on fitting, and eventually the new header. 

 

 

 

 

 

 

That's good to hear.  Proper o2 sensor placement is key to getting the Sniper to operate correctly.  And, as you know, it is key to the life of the sensor as well.
-Luke @ Holley Tech

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