Just got back from the dyno!! Stage 5 AMS + Zero Clearance results inside
04-07-2004, 10:44 AM
#13
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Something is odd-
Take a look at the low end-
With the old setup it had 300 ft/lb @ 3200
New setup to make 300 ft/lb it is @ 3600
Not Hating. Just that it shows on the dynos and maybe there are some other variables that are not being shown or not known.
Jeff
With the old setup it had 300 ft/lb @ 3200
New setup to make 300 ft/lb it is @ 3600
Not Hating. Just that it shows on the dynos and maybe there are some other variables that are not being shown or not known.
Jeff
04-07-2004, 10:49 AM
#16
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That was the first thing I noticed too (more)
In all honesty, the AMS programming is not running as optimally as we had hoped with these turbos. Simply put, to get the potential out of ZC we are going to need to do specific tuning. The wierd thing is that the car behaved pretty wierd on the dyno especially down low. It feels a lot more torquey on the street under 3000rpms. With that being said, this is a great starting point! We are excited to build off of these results and work out the tuning issues.
04-07-2004, 10:49 AM
#17
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I think he is correct in saying it has something to do with the ZC's
extra flow capacity and efficiency. The ECU may be freaking out when the MAF readings are higher than it expects and the boost begins to rise quicker than "normal".
04-07-2004, 10:50 AM
#18
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Good stuff Josh. Though I wonder if the torque on Ben's car
was artificially low(looks like it hit a target value and stayed there), as compared to the tuning on the zc turbo that would cause the computer to not be able to limit in the same fashion without tuning?
Anyway, looks like you guys may be onto something very cool.
Anyway, looks like you guys may be onto something very cool.
04-07-2004, 10:51 AM
#19
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How long was the pull? If the dyno is loading the car more than it would see on the street,
I could see all of this happening. Did boost hunt at all down low or was it a smooth rise?
04-07-2004, 10:53 AM
#20
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Well if you think about it, if they're making more boost by tighter clearances, that has to come at
some expense . . . probably low end spool. This would make sense if they are "more efficient" at higher rpms.