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Re: Boost question
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Posted by GSK@SWEDISH DYNAMICS (more from GSK@SWEDISH DYNAMICS) on Sun, 8 Feb 2004 13:56:57 Share Post by Email
In Reply to: Re: Boost question, chriscat, Sat, 7 Feb 2004 15:43:14
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ChrisCat!,
The turbocharger isolation test is only to be accomplished to provide a quick overview of maximum boost performance. We employ this test to determine turbocharger potential and engine capabilities to create exhaust velocities (which drive the turbine). If restricting the W line, boost pressures should climb out well past OEM levels and should typically see 25+ psi pressures (end of the red on boost gauge). If doing this test with the W line disconnected from the turbocharger (and open/not plugged) boost/charge pressures will be diminshed due to these pressures venting to atmosphere (pressures will escape out through the open end of the W line) and will not provide an accurate view of maximum boost potentials.
Please remember that this test is defeating all detonation control and is to be accomplished very carefully and short term (one time). In a load gear ratio (2nd or 3rd gear) a full throttle position should bring about enough exhaust velocities to render a progressive boost/charge pressure as listed above (25+ psi). If not, there may be a potential problem with the engine performance (not enough exhaust velocities created under full engine load) or the problem may be related to the turbocharger, itself(shaft binding, interference, etc).
Best of luck and regards!,
GSK @ SWEDISH DYNAMICS,INC.

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