Radix numbers
04-22-2007, 01:09 PM
#22
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Did you ever figure out what your problem was? My truck is low on power as well. The highest I have ever seen my Interceptor Scan guage read is 305 at the flywheel. I know these guages are not that accurate, but even if its 50hp off it seems way low to what other people post. HP shows 593 torque at the flywheel and 1/4 mile times about 91 mph.
Last edited by Scott Mills; 04-22-2007 at 02:34 PM.
04-22-2007, 11:27 PM
#23
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Originally Posted by Scott Mills
Did you ever figure out what your problem was? My truck is low on power as well. The highest I have ever seen my Interceptor Scan guage read is 305 at the flywheel. I know these guages are not that accurate, but even if its 50hp off it seems way low to what other people post. HP shows 593 torque at the flywheel and 1/4 mile times about 91 mph.
04-23-2007, 09:49 PM
#24
I know this is an old thread, but I have a couple of thoughts:
Was this a dynojet or mustang dyno? The mustang is a loaded unit. Typically, the mustang dyno will show a lower dyno number, but more in line with what you'd have on the street.
Were these pulls made in 2nd gear? I've often seen 4x4 trucks dyno'd in 2nd gear instead of 3rd because of the larger tires and speed limiter. 2nd gear pulls usually show a lower dyno number.
Do you recall if they used a tailpipe oxygen sensor? I've seen conflicting info on those tsilpipe O2 sensors that many shops have. Personally, I think they would react slower and be much more prone to outside contamination than a sensor inserted into a bung. Once shop I saw recently said take a full point off the O2 readings to compensate for the tailpipe sensor. You could be running too rich. As stated in the opening post, the magnusson tune only showed 13:1 AFR, when they usually have it running richer than 12:1.
Was this a dynojet or mustang dyno? The mustang is a loaded unit. Typically, the mustang dyno will show a lower dyno number, but more in line with what you'd have on the street.
Were these pulls made in 2nd gear? I've often seen 4x4 trucks dyno'd in 2nd gear instead of 3rd because of the larger tires and speed limiter. 2nd gear pulls usually show a lower dyno number.
Do you recall if they used a tailpipe oxygen sensor? I've seen conflicting info on those tsilpipe O2 sensors that many shops have. Personally, I think they would react slower and be much more prone to outside contamination than a sensor inserted into a bung. Once shop I saw recently said take a full point off the O2 readings to compensate for the tailpipe sensor. You could be running too rich. As stated in the opening post, the magnusson tune only showed 13:1 AFR, when they usually have it running richer than 12:1.
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