How to datalog Fuel Injection Quantity on OM648?
How to datalog Fuel Injection Quantity on OM648?
01-18-2019, 01:01 PM
#12
(12-25-2018, 02:35 PM)tuikku(11-29-2018, 09:53 AM)atypicalguy(11-18-2018, 10:44 PM)whipplem104 There is what looks like a fuel injection quantity on the CAN bus. But I cannot figure out the conversion on this one. I was trying to compare to the sds machine injection quantity and come up with a conversion. But I could not figure it out. I figure it has to be a volume of some kind.
Hmmm. Well, run a small, flexible line out to a fuel source on a balance, let it run for awhile at a specified rpm, and see how much goes in. I should think it would be measurable after 5 or 10 minutes at idle. Assuming you have good rpm data, it could be possible to get a conversion factor to the CAN data, which could then be used to calculate volumes at other rpms.
These blacksmoke guys would also have to know how much fuel they are dumping in.
No, they don't need to, it is enough that I know it, and it is ~220mm^3/stroke max.
That gives ~670-690hp/5500-6000rpm.
Rpm max is 6500.
(12-27-2018, 01:28 PM)atypicalguy(12-25-2018, 02:35 PM)tuikku(11-29-2018, 09:53 AM)atypicalguy Hmmm. Well, run a small, flexible line out to a fuel source on a balance, let it run for awhile at a specified rpm, and see how much goes in. I should think it would be measurable after 5 or 10 minutes at idle. Assuming you have good rpm data, it could be possible to get a conversion factor to the CAN data, which could then be used to calculate volumes at other rpms.
These blacksmoke guys would also have to know how much fuel they are dumping in.
No, they don't need to, it is enough that I know it, and it is ~220mm^3/stroke max.
That gives ~670-690hp/5500-6000rpm.
Rpm max is 6500.
Well OK thank you. They must have low compression pistons in that thing to cram enough air in without crazy peak cylinder pressures...
But I was kind of hoping you could tell the original poster where to find the fuel quantity in the data stream :-)
Is 6500 RPM done with stock rods and crank? I believe their videos mentioned having lower compression pistons and a block girdle. I have also been watching their newest videos of the engine teardown.
How do you calculate the Injection Quantity - are you just gathering that based on the power production and efficiency of the engine based on stock fuel flow and HP?
Its awesome to see them really pushing the limits with this engine. I would love to work with a tuner that understood these as there seems to be demand to mod these but only a few people seem to understand them well enough to do the tuning for higher power levels.
(12-25-2018, 02:35 PM)tuikku(11-29-2018, 09:53 AM)atypicalguy(11-18-2018, 10:44 PM)whipplem104 There is what looks like a fuel injection quantity on the CAN bus. But I cannot figure out the conversion on this one. I was trying to compare to the sds machine injection quantity and come up with a conversion. But I could not figure it out. I figure it has to be a volume of some kind.
Hmmm. Well, run a small, flexible line out to a fuel source on a balance, let it run for awhile at a specified rpm, and see how much goes in. I should think it would be measurable after 5 or 10 minutes at idle. Assuming you have good rpm data, it could be possible to get a conversion factor to the CAN data, which could then be used to calculate volumes at other rpms.
These blacksmoke guys would also have to know how much fuel they are dumping in.
No, they don't need to, it is enough that I know it, and it is ~220mm^3/stroke max.
That gives ~670-690hp/5500-6000rpm.
Rpm max is 6500.
(12-27-2018, 01:28 PM)atypicalguy(12-25-2018, 02:35 PM)tuikku(11-29-2018, 09:53 AM)atypicalguy Hmmm. Well, run a small, flexible line out to a fuel source on a balance, let it run for awhile at a specified rpm, and see how much goes in. I should think it would be measurable after 5 or 10 minutes at idle. Assuming you have good rpm data, it could be possible to get a conversion factor to the CAN data, which could then be used to calculate volumes at other rpms.
These blacksmoke guys would also have to know how much fuel they are dumping in.
No, they don't need to, it is enough that I know it, and it is ~220mm^3/stroke max.
That gives ~670-690hp/5500-6000rpm.
Rpm max is 6500.
Well OK thank you. They must have low compression pistons in that thing to cram enough air in without crazy peak cylinder pressures...
But I was kind of hoping you could tell the original poster where to find the fuel quantity in the data stream :-)
Is 6500 RPM done with stock rods and crank? I believe their videos mentioned having lower compression pistons and a block girdle. I have also been watching their newest videos of the engine teardown.
How do you calculate the Injection Quantity - are you just gathering that based on the power production and efficiency of the engine based on stock fuel flow and HP?
Its awesome to see them really pushing the limits with this engine. I would love to work with a tuner that understood these as there seems to be demand to mod these but only a few people seem to understand them well enough to do the tuning for higher power levels.
Messages In This Thread
How to datalog Fuel Injection Quantity on OM648? - by Drewkeen - 10-10-2018, 11:36 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by Drewkeen - 10-18-2018, 11:07 AM
RE: How to datalog Fuel Injection Quantity on OM648? - by Petar - 10-18-2018, 04:53 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by baldur - 10-18-2018, 09:53 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by Petar - 10-19-2018, 07:22 AM
RE: How to datalog Fuel Injection Quantity on OM648? - by Drewkeen - 11-18-2018, 10:26 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by whipplem104 - 11-18-2018, 10:44 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by atypicalguy - 11-29-2018, 09:53 AM
RE: How to datalog Fuel Injection Quantity on OM648? - by tuikku - 12-25-2018, 02:35 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by atypicalguy - 12-27-2018, 01:28 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by Drewkeen - 01-18-2019, 01:01 PM
RE: How to datalog Fuel Injection Quantity on OM648? - by Drewkeen - 01-18-2019, 12:57 PM
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