Dynojet dyno vs Data Log Lab
06-24-2011, 10:59 PM
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Dynojet dyno vs Data Log Lab
I recently got a dynotune on a dynojet and these numbers came out:
This next graph was made the same day after the dyno tune, after I adjusted some spark and partially fixed a surge or fuel cut issue (turned out to also have lots of knock events that were the result of too low of a threshold)
These two were produced after completely fixing the Knock Threshold issue I had prior (I doubled and in some cases almost tripled the value), adding some fuel in a few lean areas, tweaking timing and adjusting a few other things that I can't recall off the top of my head.
Now I don't know how good Data Log Lab is for it's graphs, but if it's even remotely close I call it good, I'll be going to a dynojet to get another 2-3 pulls in for a good graph once I have my boost spike issue resolved (initial peak boost results in it peaking at 17-18psi, then dropping down to 15.4). I'll probably drill and tap the cold side of the intercooler and run a 1/8" internal diameter hose to the MBC. I've also heard of using the Intake but I'm weary of what the vacuum would do to the MBC or WGA.
EDIT - I had the wrong car definition in, I put a 3.6 instead of 3.9 rear end. Dropped the numbers a bit, back into their proper place. I need to get the car weighed so I know what the real curb weight is..
This next graph was made the same day after the dyno tune, after I adjusted some spark and partially fixed a surge or fuel cut issue (turned out to also have lots of knock events that were the result of too low of a threshold)
These two were produced after completely fixing the Knock Threshold issue I had prior (I doubled and in some cases almost tripled the value), adding some fuel in a few lean areas, tweaking timing and adjusting a few other things that I can't recall off the top of my head.
Now I don't know how good Data Log Lab is for it's graphs, but if it's even remotely close I call it good, I'll be going to a dynojet to get another 2-3 pulls in for a good graph once I have my boost spike issue resolved (initial peak boost results in it peaking at 17-18psi, then dropping down to 15.4). I'll probably drill and tap the cold side of the intercooler and run a 1/8" internal diameter hose to the MBC. I've also heard of using the Intake but I'm weary of what the vacuum would do to the MBC or WGA.
EDIT - I had the wrong car definition in, I put a 3.6 instead of 3.9 rear end. Dropped the numbers a bit, back into their proper place. I need to get the car weighed so I know what the real curb weight is..
Last edited by Der_Idiot; 06-24-2011 at 11:10 PM.
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06-25-2011, 12:53 AM
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Why would vacuum mess up the MBC or wastegate?
BTW I wouldn't compare the DLL to the dyno chart. Comparing numbers is only useful if you are using the same measuring stick.
BTW I wouldn't compare the DLL to the dyno chart. Comparing numbers is only useful if you are using the same measuring stick.
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06-25-2011, 10:07 AM
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the datalog dyno graphs are merely a tuning tool in my opinion.
They dont tend to resemble the right shape or absolute numbers that any dyno produces. they ARE however a means of comparing back to back power runs to see if tuning changes have made improvements.
They dont tend to resemble the right shape or absolute numbers that any dyno produces. they ARE however a means of comparing back to back power runs to see if tuning changes have made improvements.
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