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why do the turbo's do this

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Old 02-11-04, 08:23 PM
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my fc broke

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why do the turbo's do this

well i noticed that the PSI doesnt stay solid all the way to redline, it bleeds off. why is this?
Old 02-12-04, 07:11 AM
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what does it go down too? does it go down by alot?you may have a boost leak ?

mine fd does this, i notice alot is based on how cold or warm the outside temp. is, colder it is better it boosts, i think when i get a fmic maybe it will sort the problem out.
mine only drops a little tho second turbo peaks to 0.8 then holds 0.7 (or under sometimes)



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Old 02-12-04, 01:26 PM
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It's a mechanical system - it's not closed loop.


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Old 02-13-04, 12:41 AM
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my fc broke

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well it doesnt go down alot. maybe by 1 or 2psi by 7grand i guess it just depends on the weather
Old 02-13-04, 01:10 AM
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the amount of air used by the engine goes up with load
the turbo is sized to keep up with load up to the med/high rpms range, so at high rpms, it just cant keep up all the way

thats why a bigger turbo at the same PSI will make more power

edit:cold air is denser and easier to keep the engine fed with
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