Got my car Dyno Tuned!
01-29-2011, 10:07 PM
#22
4th Gear Member
Thread Starter
Join Date: Dec 2007
Location: San Jose, CA
Posts: 1,112
Chris - the only reason I got the car dyno tuned was because I was experiencing problems with your guy's tune's. Every time I started the car, the idle in my car would be sporadic, bouncing all over the place. I have even got 3 different tunes to try and correct this problem, but all were the same. I even datalogged with my xcal3 to see if I was crazy but the RPM's were bouncing at around 75-200RPM. The new tune I got from the shop got rid of all my idling issues which is the main reason I got the tune.
They dyno'ed your guy's 91 street tune and it made it made I think 162 RWHP.. which is less than stock HP (assuming with the 20% drivetrain loss) I will post the rest of the dyno sheets when I get home. They didn't want to push the car in those A/F ratios, but I gave them the okay and if it got any higher than it was to shut it down. They did the pull in 3rd, 5th, and also with O/D off.
The sniffer did fall out on that test, but there was 4 other tests where it was in place. I know sniffer's aren't completely accurate, but even if it was 14:1 ratio, isn't that still too lean? A buddy of mine told me to get my car tuned because with his 07 GT his car was running 14:1 on the dyno (not with sniffer, but with the proper location where the front 02 sensor is, and a in a completely different shop where I got mine tuned)
I'm not trying to bash on your guy's tune... I had a bama tune back since 2008 and always ran with his tune and loved every WOT with it!
They dyno'ed your guy's 91 street tune and it made it made I think 162 RWHP.. which is less than stock HP (assuming with the 20% drivetrain loss) I will post the rest of the dyno sheets when I get home. They didn't want to push the car in those A/F ratios, but I gave them the okay and if it got any higher than it was to shut it down. They did the pull in 3rd, 5th, and also with O/D off.
The sniffer did fall out on that test, but there was 4 other tests where it was in place. I know sniffer's aren't completely accurate, but even if it was 14:1 ratio, isn't that still too lean? A buddy of mine told me to get my car tuned because with his 07 GT his car was running 14:1 on the dyno (not with sniffer, but with the proper location where the front 02 sensor is, and a in a completely different shop where I got mine tuned)
I'm not trying to bash on your guy's tune... I had a bama tune back since 2008 and always ran with his tune and loved every WOT with it!
01-30-2011, 09:03 AM
#24
5th Gear Member
Join Date: Jul 2009
Location: Delaware
Posts: 2,215
Oh and if I complain about my dyno numbers can someone fly me out?
Last edited by JCON; 01-30-2011 at 09:19 AM.
01-30-2011, 12:46 PM
#25
Chris - the only reason I got the car dyno tuned was because I was experiencing problems with your guy's tune's. Every time I started the car, the idle in my car would be sporadic, bouncing all over the place. I have even got 3 different tunes to try and correct this problem, but all were the same. I even datalogged with my xcal3 to see if I was crazy but the RPM's were bouncing at around 75-200RPM. The new tune I got from the shop got rid of all my idling issues which is the main reason I got the tune.
They dyno'ed your guy's 91 street tune and it made it made I think 162 RWHP.. which is less than stock HP (assuming with the 20% drivetrain loss) I will post the rest of the dyno sheets when I get home. They didn't want to push the car in those A/F ratios, but I gave them the okay and if it got any higher than it was to shut it down. They did the pull in 3rd, 5th, and also with O/D off.
The sniffer did fall out on that test, but there was 4 other tests where it was in place. I know sniffer's aren't completely accurate, but even if it was 14:1 ratio, isn't that still too lean? A buddy of mine told me to get my car tuned because with his 07 GT his car was running 14:1 on the dyno (not with sniffer, but with the proper location where the front 02 sensor is, and a in a completely different shop where I got mine tuned)
I'm not trying to bash on your guy's tune... I had a bama tune back since 2008 and always ran with his tune and loved every WOT with it!
They dyno'ed your guy's 91 street tune and it made it made I think 162 RWHP.. which is less than stock HP (assuming with the 20% drivetrain loss) I will post the rest of the dyno sheets when I get home. They didn't want to push the car in those A/F ratios, but I gave them the okay and if it got any higher than it was to shut it down. They did the pull in 3rd, 5th, and also with O/D off.
The sniffer did fall out on that test, but there was 4 other tests where it was in place. I know sniffer's aren't completely accurate, but even if it was 14:1 ratio, isn't that still too lean? A buddy of mine told me to get my car tuned because with his 07 GT his car was running 14:1 on the dyno (not with sniffer, but with the proper location where the front 02 sensor is, and a in a completely different shop where I got mine tuned)
I'm not trying to bash on your guy's tune... I had a bama tune back since 2008 and always ran with his tune and loved every WOT with it!
If you had idle fluctuation issues and the car was that lean, it wouldn't have made the horsepower/torque that it did. If you had idle fluctuation issues and the car was SLIGHTLY lean, I would say Bama might have wrote the tune for the wrong intake, or something was missing out of the tune submission form. Maybe it was in the form and they left it out of the tune file? I think there's two things happening... The creativity of the dyno shop to manipulate their numbers to look alot better (uncorrected), and pulling it in different gears and not using a dyno/converter lock file from us to be fair. The second problem is it sounds like an error in the Bama file, to begin with (I'm guessing wrong CAI, or missing a mod either from the tune submission form or in human error when building it).
I will look into the tune tomorrow (PM me over first/last name) and make sure that they're correct for the mods submitted on the form. If it is (which it sounds like it's not based on the idle), I urge you to get a pull done (with a dyno lock file that I'll provide you) at a local shop (we'll pay for it). If it's not correct, we'll correct the file and send it to you. Even if it's in the file, I'll still pay to have pulls done at a different local dynojet, and provide you with a dyno lock file.
Let me know if you're interested! I just want to make the tune right for you, and the results fair for us.
01-30-2011, 01:20 PM
#26
4th Gear Member
Join Date: Mar 2009
Location: Houston, Texas
Posts: 1,731
02-01-2011, 11:30 AM
#29
I personally looked through your files. There's absolutely no way that the results the shop gave you are correct. I'm thinking he did a 3/4 throttle pull and tried to keep the car from going into open loop. This way, the car looks like it's lean.
Here's what I would do... take the car to a different Dynojet shop and have them dyno it. Dyno it with the 91 Race tune, and have them put the wideband sensor in one of the rear o2 sensor bungs (because the rear o2s are off on the race tune). Have them run it with overdrive off, and even if it's 3rd or 4th gear, that's fine. We're just going to prove that the air/fuel ratio isn't what the other shop said it was.
If you want, I can also send you over a "dyno lock" copy of the tune so that it will run it in 4th without the dyno operator having to do anything differently. This way the numbers are correct. You can either view these results in "Uncorrected" to see how it compares to your dyno tune, because they were "Uncorrected", or you can also run the dyno tune again on a different dyno and have them both SAE corrected.
Email me your invoice from the shop and we'll pay for it, as long as you post your graphs here on the forums and you make sure that you load our tunes in properly. (We can do that via remote access of your computer if you want).
Here's what I would do... take the car to a different Dynojet shop and have them dyno it. Dyno it with the 91 Race tune, and have them put the wideband sensor in one of the rear o2 sensor bungs (because the rear o2s are off on the race tune). Have them run it with overdrive off, and even if it's 3rd or 4th gear, that's fine. We're just going to prove that the air/fuel ratio isn't what the other shop said it was.
If you want, I can also send you over a "dyno lock" copy of the tune so that it will run it in 4th without the dyno operator having to do anything differently. This way the numbers are correct. You can either view these results in "Uncorrected" to see how it compares to your dyno tune, because they were "Uncorrected", or you can also run the dyno tune again on a different dyno and have them both SAE corrected.
Email me your invoice from the shop and we'll pay for it, as long as you post your graphs here on the forums and you make sure that you load our tunes in properly. (We can do that via remote access of your computer if you want).
Last edited by AMChrisRose; 02-01-2011 at 12:08 PM.
