Aux port tuning for turbo
01-21-2009, 06:54 AM
#53
whines all the way home
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So I guess you dont care to tell what adjustments you made?
I would aggree with you that once you go FI there really isnt a need to shift and jam the throttle open as fast as possible, even when watching in car race footage there is rarely ever a shift that is rushed forcefully, just smooth relaxed and controled shifts...
I would aggree with you that once you go FI there really isnt a need to shift and jam the throttle open as fast as possible, even when watching in car race footage there is rarely ever a shift that is rushed forcefully, just smooth relaxed and controled shifts...
Last edited by Rotr8; 01-21-2009 at 06:57 AM.
01-21-2009, 10:58 AM
#55
whines all the way home
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no I dont tune myself and I wouldnt ask anyone to give away thier bussiness' property or trade secrets, but in a general sense back to the original question, snappier or more gradual?
01-21-2009, 11:06 AM
#56
"Massaged" would probably be the appropriate term.
The mid throttle is a bit delayed in 2nd and 3rd to lower the onset of boost (to prevent throttle snap-oversteer), but the initial tip-in of first is a bit quicker.
I do some stuff to 4th and 5th as well.
The mid throttle is a bit delayed in 2nd and 3rd to lower the onset of boost (to prevent throttle snap-oversteer), but the initial tip-in of first is a bit quicker.
I do some stuff to 4th and 5th as well.
01-21-2009, 11:16 AM
#57
whines all the way home
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nice,,,
and does this affect your boost in terms or how it comes(how gradually it reaches full boost) or where it comes(further into the curve)? if this is starting to reveal anything you dont want to get into thats fine...
Maybe we're getting off subject to much, just curious and always trying to learn,,, end threadjack....
and does this affect your boost in terms or how it comes(how gradually it reaches full boost) or where it comes(further into the curve)? if this is starting to reveal anything you dont want to get into thats fine...
Maybe we're getting off subject to much, just curious and always trying to learn,,, end threadjack....
01-21-2009, 12:10 PM
#62
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helmholtz tuning actually can create small amounts of boost. Slightly pressureized air is still compressible and therefore still is capable of having pressure waves and still resonates like ambient pressure air.
01-21-2009, 02:21 PM
#65
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01-21-2009, 06:44 PM
#69
charts
01-21-2009, 08:15 PM
#71
01-27-2009, 03:43 AM
#73
The test below was done in an effort to tune the power band while keeping turbo as close as possible within its efficiency map
aux port opening at 6800
aux port blocked but small hole drilled in blocking plate
pressure at turbo 10 psi rising to 12psi from 7000 onwards
pressure at UIM 9.5 to 7000 then back to about 8 from there on
The pink line is with the port completely blocked
seems to have worked
the dip n the blue line at 6200 is possibly my wastegate opening slightly . Have noticed this does not happen on every run
aux port opening at 6800
aux port blocked but small hole drilled in blocking plate
pressure at turbo 10 psi rising to 12psi from 7000 onwards
pressure at UIM 9.5 to 7000 then back to about 8 from there on
The pink line is with the port completely blocked
seems to have worked
the dip n the blue line at 6200 is possibly my wastegate opening slightly . Have noticed this does not happen on every run
Last edited by Brettus; 01-27-2009 at 04:24 AM.
