Mustang Dyno comparison.
I just read some more...
This BS has to stop.
DTM and Nick did not do jack to be ashamed of. They both wanted to know the numbers and David feels that this is an issue that he wants to post about. So be it.
In the end as its my car and there are multiple issues that could explain at least part, if not all of the difference in HP.
I feel all the **** talking needs to stop and some folks need to have a big steaming glass of STFU.
This BS has to stop.
DTM and Nick did not do jack to be ashamed of. They both wanted to know the numbers and David feels that this is an issue that he wants to post about. So be it.
In the end as its my car and there are multiple issues that could explain at least part, if not all of the difference in HP.
I feel all the **** talking needs to stop and some folks need to have a big steaming glass of STFU.
Last edited by dsycks; May 16, 2008 at 04:05 AM.
Thanks Dan.
Out of respect for you I ill no longer post in this thread. The horse can't get up any more. Especially if it had the wrong diagnosis after it was put down.
I am curious however why the car wasn't dyno'd again AFTER the ignition issue was resolved. But I digress.
Out of respect for you I ill no longer post in this thread. The horse can't get up any more. Especially if it had the wrong diagnosis after it was put down.
I am curious however why the car wasn't dyno'd again AFTER the ignition issue was resolved. But I digress.
Evolving Member
Joined: Mar 2008
Posts: 102
Likes: 0
From: Midwest
so between the time it was tuned/ dyno'd at dtm vs at bushur... it developed a check engine for lean code, changed to a heavier wheel, leaking had noticeably increased at o2 housing, and the plug wires were arcing out agianst the cover. this is beyond the obvious changes in condition one might have seen from one dyno to another on different dates (ie, temp., humidity, airflow through the front of the car, etc.).
if I am reading that right and applying some basic logical thought accordingly, this "comparison" could have alot of causes for discrepancies. It would be hard to say how much these variables could compound to affect the numbers from one dyno to another but obviously this is not an ideal situation from which you could draw a definative conclusion.
the point has been beat to death that dynos are simply tools for approximating changes... no one dyno is the end all judge for which others be compared. I can think of a bunch of places that would say their dyno is the most accurate dyno... these kind of dyno debates are nothing new and will not end here.
(dont know why I bothered posting this but thats my 2 cents, I think this is no more than a passive aggressive pissing match as usual and dont wish to continue fueling the fire. I can appreciate the attempt to make comparison.)
if I am reading that right and applying some basic logical thought accordingly, this "comparison" could have alot of causes for discrepancies. It would be hard to say how much these variables could compound to affect the numbers from one dyno to another but obviously this is not an ideal situation from which you could draw a definative conclusion.
the point has been beat to death that dynos are simply tools for approximating changes... no one dyno is the end all judge for which others be compared. I can think of a bunch of places that would say their dyno is the most accurate dyno... these kind of dyno debates are nothing new and will not end here.
(dont know why I bothered posting this but thats my 2 cents, I think this is no more than a passive aggressive pissing match as usual and dont wish to continue fueling the fire. I can appreciate the attempt to make comparison.)
Last edited by twkdcd595; May 16, 2008 at 07:24 AM. Reason: grammar, sorry
Nick,
The car was dyno'd multiple times after the ignition issues were resolved actually. The car was also dyno'd after the ECU was re-set and cleared with my scan tool, actually.
Dan,
I am surprised you turned the boost back up, I know when you were here you said you definetely didn't want to run around the road course at 25 psi of boost. I had only turned it down to 22.4 psi which was inline with what Nick told you he tuned the car at, which was 23 psi.
The tune seemed "safe" at that 25 psi boost level as there was no excessive knock, just a few knock counts around peak torque and then 0 after that. I guess the need for speed overtakes everything else at times, I do the same thing, haha.
The car does have some issues that need fixed, the exhaust leak being one of the biggest, more from a noise stand point than anything else. I'd think taking that housing off and simply drilling the holes out for more room would allow it to be re-installed, wouldn't take too long.
The car was dyno'd multiple times after the ignition issues were resolved actually. The car was also dyno'd after the ECU was re-set and cleared with my scan tool, actually.
Dan,
I am surprised you turned the boost back up, I know when you were here you said you definetely didn't want to run around the road course at 25 psi of boost. I had only turned it down to 22.4 psi which was inline with what Nick told you he tuned the car at, which was 23 psi.
The tune seemed "safe" at that 25 psi boost level as there was no excessive knock, just a few knock counts around peak torque and then 0 after that. I guess the need for speed overtakes everything else at times, I do the same thing, haha.
The car does have some issues that need fixed, the exhaust leak being one of the biggest, more from a noise stand point than anything else. I'd think taking that housing off and simply drilling the holes out for more room would allow it to be re-installed, wouldn't take too long.
so between the time it was tuned/ dyno'd at dtm vs at bushur... it developed a check engine for lean code, changed to a heavier wheel, leaking had noticeably increased at o2 housing, and the plug wires were arcing out agianst the cover. this is beyond the obvious changes in condition one might have seen from one dyno to another on different dates (ie, temp., humidity, airflow through the front of the car, etc.).
if I am reading that right and applying some basic logical thought accordingly, this "comparison" could have alot of causes for discrepancies. It would be hard to say how much these variables could compound to affect the numbers from one dyno to another but obviously this is not an ideal situation from which you could draw a definative conclusion.
the point has been beat to death that dynos are simply tools for approximating changes... no one dyno is the end all judge for which others be compared. I can think of a bunch of places that would say their dyno is the most accurate dyno... these kind of dyno debates are nothing new and will not end here.
(dont know why I bothered posting this but thats my 2 cents, I think this is no more than a passive aggressive pissing match as usual and dont wish to continue fueling the fire. I can appreciate the attempt to make comparison.)
if I am reading that right and applying some basic logical thought accordingly, this "comparison" could have alot of causes for discrepancies. It would be hard to say how much these variables could compound to affect the numbers from one dyno to another but obviously this is not an ideal situation from which you could draw a definative conclusion.
the point has been beat to death that dynos are simply tools for approximating changes... no one dyno is the end all judge for which others be compared. I can think of a bunch of places that would say their dyno is the most accurate dyno... these kind of dyno debates are nothing new and will not end here.
(dont know why I bothered posting this but thats my 2 cents, I think this is no more than a passive aggressive pissing match as usual and dont wish to continue fueling the fire. I can appreciate the attempt to make comparison.)
Nick,
The car was dyno'd multiple times after the ignition issues were resolved actually. The car was also dyno'd after the ECU was re-set and cleared with my scan tool, actually.
Dan,
I am surprised you turned the boost back up, I know when you were here you said you definetely didn't want to run around the road course at 25 psi of boost. I had only turned it down to 22.4 psi which was inline with what Nick told you he tuned the car at, which was 23 psi.
The tune seemed "safe" at that 25 psi boost level as there was no excessive knock, just a few knock counts around peak torque and then 0 after that. I guess the need for speed overtakes everything else at times, I do the same thing, haha.
The car does have some issues that need fixed, the exhaust leak being one of the biggest, more from a noise stand point than anything else. I'd think taking that housing off and simply drilling the holes out for more room would allow it to be re-installed, wouldn't take too long.
The car was dyno'd multiple times after the ignition issues were resolved actually. The car was also dyno'd after the ECU was re-set and cleared with my scan tool, actually.
Dan,
I am surprised you turned the boost back up, I know when you were here you said you definetely didn't want to run around the road course at 25 psi of boost. I had only turned it down to 22.4 psi which was inline with what Nick told you he tuned the car at, which was 23 psi.
The tune seemed "safe" at that 25 psi boost level as there was no excessive knock, just a few knock counts around peak torque and then 0 after that. I guess the need for speed overtakes everything else at times, I do the same thing, haha.
The car does have some issues that need fixed, the exhaust leak being one of the biggest, more from a noise stand point than anything else. I'd think taking that housing off and simply drilling the holes out for more room would allow it to be re-installed, wouldn't take too long.
I couldn't resist.
According to Dan, It was NOT dyno'd after, but I'm sure we have to take your word for it as you seem to be the king of da castle
Also, it seems surprising to me that you actually logged a run of any sort as Dan stated to me on the phone right after the pull, that NO LAPTOPS were installed on the car. How did you log it? What did you use to log the runs? Do you have a copy of the logs?
The car was tuned for 30PSI. The entire map was scaled for it. Now the car was dyno'd at 23 psi on our dyno. BUT like I mentioned to Dan several times, the load on the street and higher gears would result in 26 psi peak and falling off. If your assumptions are correct then it was actually lower than I presumed it would be.
Now how did you log boost? Do you have the logs for that?
He turned the boost up because I told him I would BET MY LIFE on that tune.
Its amazing how your stories change so often.
Why would you reset the ECU? Clearing a code does not constitute reseting the ECU FYI
.
Buschur you did contradict yourself...you said you didn't log the car and now you said you didn't see that much knock?
Nick, I believe clearing the codes does reset the ecu. Just like disconnecting the battery or removing the ecu fuse.
Nick, I believe clearing the codes does reset the ecu. Just like disconnecting the battery or removing the ecu fuse.
David,
I'd like to clarify a few things for you about fuel trims on an EVO VIII since you seem to be a bit mistaken. I just tested this on an VIII to make sure I wasn't going crazy. If you clear a code with a code scanner, it will reset the codes and also the readiness tests. IT WILL NOT RESET LONG TERM FUEL TRIMS. The ONLY way to reset long term fuel trims is to disconnect the negative cable from the battery so that the VIII ECU will completely reset.
Something around here stinks and I don't think it's us because our story isn't changing but yours is.
I'd like to clarify a few things for you about fuel trims on an EVO VIII since you seem to be a bit mistaken. I just tested this on an VIII to make sure I wasn't going crazy. If you clear a code with a code scanner, it will reset the codes and also the readiness tests. IT WILL NOT RESET LONG TERM FUEL TRIMS. The ONLY way to reset long term fuel trims is to disconnect the negative cable from the battery so that the VIII ECU will completely reset.
Something around here stinks and I don't think it's us because our story isn't changing but yours is.
OK, now I've got to learn something. Are you saying that by clearing the LTFT's, the performance at WOT changes? I've always been with the understanding that WOT is 'you get what you want, but you may not like it'. Does clearing the stock ecu codes (other than obvious equip failure, etc) have any effect on WOT operations?
If you have considered DTM in the past, it would be your loss not to consider them in the future.
Nick,
You called Dan and have the truth. He asked me not to expose the entire truth and just stick the facts of the dyno pull. For the rest of you Dan has asked me to let him tell the entire story. The short of it is, I did NOT connect a laptop to the car OR log it until after 3-4 baseline runs were done, which are the dyno sheets posted. My story was in fact truthful. After seeing some things with boost/AFR Dan then requested for me to take a further look into the car.
I'll say this again, JUST LIKE IN MY FIRST post, NOTHING was connected to the car for the dyno tests to check the differences between the dynos. Not a logger, not a scan tool, not a laptop. Not until AFTER the comparisons was anything attached to the car.
It was then determinded, that the knock count was low even at 25 psi, this is actually a compliment towards Nick in that one and only area. It had a count of 1-3 around peak torque and then 0 for the rest of the RPM.
I don't lie, haven't you guys figured that out yet? You won't catch me cause I don't do it.
You called Dan and have the truth. He asked me not to expose the entire truth and just stick the facts of the dyno pull. For the rest of you Dan has asked me to let him tell the entire story. The short of it is, I did NOT connect a laptop to the car OR log it until after 3-4 baseline runs were done, which are the dyno sheets posted. My story was in fact truthful. After seeing some things with boost/AFR Dan then requested for me to take a further look into the car.
I'll say this again, JUST LIKE IN MY FIRST post, NOTHING was connected to the car for the dyno tests to check the differences between the dynos. Not a logger, not a scan tool, not a laptop. Not until AFTER the comparisons was anything attached to the car.
It was then determinded, that the knock count was low even at 25 psi, this is actually a compliment towards Nick in that one and only area. It had a count of 1-3 around peak torque and then 0 for the rest of the RPM.
I don't lie, haven't you guys figured that out yet? You won't catch me cause I don't do it.