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Lag vs Boost Threshold
Posted by Chad (more from Chad) on Mon, 30 Aug 2004 11:49:49
In Reply to: No lag here..., Scott Paterson
[Profile/Gallery]
, Mon, 30 Aug 2004 10:48:34
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Lag is defined as how much time it takes the turbo to get spooling once you are in the proper RPM range. Boost threshold is the RPM at which their is enough exhuast to spin the turbo. The WRX has a much higher boost threshold than what's typical for saabs, but there really isn't much lag once your in the proper RPM range.
I don't know if that made sense, so let me us an example. If your saab makes it's max PSI at 2k rpm, and you hit the gas at 2k and the car take 2 secs to reach max boost, you have a low boost threshold with high lag.
If your WRX makes max boost at 4k rpm and you need to rev the engine up to 4k before you can get boost, but once it's there it hits max boost in .5 secs, you have a high boost threshold with low lag.
posted by 12.14.115...
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