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What does the Vacuum load at Idle on a Turbo RX7 indicate?

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Old 11-02-02, 07:49 PM
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Question What does the Vacuum load at Idle on a Turbo RX7 indicate?

Just what i asked. I was reading where some guy was saying his car pulls 420hgmm at idle. What does that indicate? Someone else said those are pheniminal numbers.

Thx
Old 11-02-02, 08:05 PM
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from my understanding the vac numbers at idle can indicate tight or weak seals in the engine, kinda like doing a leakdown test on a piston engine. not 100% sure if thats what it actualy is but thats what ive been told.
Old 11-02-02, 08:13 PM
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Right on, Thx... anyone want to back this up?

Also .. what are considered "good numbers"
Old 11-02-02, 08:57 PM
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that is just a metric number... which is 16.5 " on a standard PSI gauge.

stock port should be 15-20" street port 12-16"

that is at a 750 idle
Old 11-02-02, 09:15 PM
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Ported motors will also cause the boost gauge needle to fluctuate up and down at idle.
Old 11-03-02, 12:31 AM
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SO I guess my t2 has low vacumm since it reads 13 at 800 rpms... Oh well it runs great.
Old 11-03-02, 03:18 AM
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Originally posted by SaabGuy
SO I guess my t2 has low vacumm since it reads 13 at 800 rpms... Oh well it runs great.
Yeah...13 is kinda low ( Or I guess its actually kinda high... )
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