Another spool thread - boost rise time at 4000 RPM
09-12-2011, 08:19 PM
#1
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Another spool thread - boost rise time at 4000 RPM
Choose a gear so that car is between 65 and 70 mph at 4000 RPM.
Cruise at just above 4000 RPM, coast down to 4000, then floor it.
The data should look like this:
Setting 0 time to be whatever time it hits 100 kPa, here is sample data format (not actual)
5 psi - 0.2 sec
10 psi - 0.5 sec
12 psi - 0.6 sec
15 psi - 0.8 sec
Cruise at just above 4000 RPM, coast down to 4000, then floor it.
The data should look like this:
Setting 0 time to be whatever time it hits 100 kPa, here is sample data format (not actual)
5 psi - 0.2 sec
10 psi - 0.5 sec
12 psi - 0.6 sec
15 psi - 0.8 sec
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09-13-2011, 02:16 AM
#5
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Well maybe the data presented this way is more useful.
Boost appears to be a linear rise; it overshoots 15 psi slightly so it's pretty linear to 15 psi.
0-15 psi time:
4000 RPM - 0.58 sec ~68 mph
4400 RPM - 0.48 sec (same gear)
5000 RPM - 0.42 sec
Boost appears to be a linear rise; it overshoots 15 psi slightly so it's pretty linear to 15 psi.
0-15 psi time:
4000 RPM - 0.58 sec ~68 mph
4400 RPM - 0.48 sec (same gear)
5000 RPM - 0.42 sec
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01-06-2012, 11:35 AM
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Wow, that would really throw this thread for a loop. I was thinking displacement ranging from 1.6-2.1L not 1.6-7.0......and just to make sure this thread is basically a dick measuring contest, correct? lol Not really relevant except for initial spool for highway racing?
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01-06-2012, 11:42 AM
#15
Wow, that would really throw this thread for a loop. I was thinking displacement ranging from 1.6-2.1L not 1.6-7.0......and just to make sure this thread is basically a dick measuring contest, correct? lol Not really relevant except for initial spool for highway racing?
To a noob like you, yes.
To others, like Jason, no.
If you read through our previous spool thread and glance over the plotted charts with everyones contributed info, you'll find it very helpful since you will see what combo's produce what curves.
Post less.
Read more.
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01-06-2012, 11:42 AM
#16
Wow, that would really throw this thread for a loop. I was thinking displacement ranging from 1.6-2.1L not 1.6-7.0......and just to make sure this thread is basically a dick measuring contest, correct? lol Not really relevant except for initial spool for highway racing?
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