disappointed dyno numbers.....
#1
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disappointed dyno numbers.....
268 hps/257 torque. i lost 3 hps since my plenum and intake but i gained 14 torque (270.5/243.4). a/f was 16.5 is that the culprit? i did a reflash when i installed pulley, hfc, and y pipe. since then i took off the y pipe and got hks exhaust. if i reflash the ecu again and run 13:1 ratio would i gain about 20 hps that i should with the mods?
#2
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Originally Posted by gimpster621
268 hps/257 torque. i lost 3 hps since my plenum and intake but i gained 14 torque (270.5/243.4). a/f was 16.5 is that the culprit? i did a reflash when i installed pulley, hfc, and y pipe. since then i took off the y pipe and got hks exhaust. if i reflash the ecu again and run 13:1 ratio would i gain about 20 hps that i should with the mods?
Did you do a dyno pull for AFRs and determine if an ecu flash was needed before you sent yours in?
There are many other factoring in on your dynos:
Correction factor
humidity
temp
etc.
A 3 hp loss could just be variances in the dyno itself and not indicating a true loss. I would be happy with the tq gains you are seeing. Personally, I think your numbers are high for the parts you are running so be happy with that.
#3
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Was your AF really 16.5:1 at WOT? If so..you engine is not going to last very long.
I assume that is a typo. The numbers are excellent for your mods, and the fact you gained 14ft/lbs is impressive. Oftentimes NA mods and tuning will generate more meaningiful improvements in the midrange, and smaller gains up top.
What kind of dyno was this? Can you post your dyno chart?
I assume that is a typo. The numbers are excellent for your mods, and the fact you gained 14ft/lbs is impressive. Oftentimes NA mods and tuning will generate more meaningiful improvements in the midrange, and smaller gains up top.
What kind of dyno was this? Can you post your dyno chart?
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no scanner
i'll try to take a clear pic
the a/f ratio reading of 16.5 is from like 2k rpms. then it dips down to like a 13 and climbs back up to 15.6ish. im going to reflash the ecu again this week and do a dynojet dyno. reason numbers are high is because they were on a dynopak
i'll try to take a clear pic
the a/f ratio reading of 16.5 is from like 2k rpms. then it dips down to like a 13 and climbs back up to 15.6ish. im going to reflash the ecu again this week and do a dynojet dyno. reason numbers are high is because they were on a dynopak
Last edited by gimpster621; 02-19-2006 at 11:15 PM.
#13
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if the sensor was at the tail pipe then its not an accurate a/f ratio. im not sure how much it could be off, but it may not be as bad as you think.
i would encourage you to get it tuned and have the a/f read in the actual exhaust stream via one of your o2 sensor bungs.
i would encourage you to get it tuned and have the a/f read in the actual exhaust stream via one of your o2 sensor bungs.
#14
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Originally Posted by PoWeRtRiP
if the sensor was at the tail pipe then its not an accurate a/f ratio. im not sure how much it could be off, but it may not be as bad as you think.
i would encourage you to get it tuned and have the a/f read in the actual exhaust stream via one of your o2 sensor bungs.
i would encourage you to get it tuned and have the a/f read in the actual exhaust stream via one of your o2 sensor bungs.
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I think since the A/F was measured at the tailpipe, realistically the A/F is not that high. I think it was DaveZ that told me that it would come out higher at that end, something like a point higher.
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just got back from technosquare. i had a slight pinging and fixed it. af is now 13:1 and car pulls hard all the way til 7k. redynoing it this sunday. i'll figure out a way to scan it =D
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