How much vacume should standard Saph make?

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26-06-2005, 07:47 AM

Kevin B

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How much vacume should standard Saph make?

On tick-over?

Fitted boost gauge yesterday and its showing 10, but I for some reason thought it should be nearer 15

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26-06-2005, 10:34 AM

Guinnless

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Sounds like you have a leak. Should be around 18 in/Hg.

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26-06-2005, 10:36 AM

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Depends on engine spec cams, ports, compression ratio etc...

If you mean -10 psi then that is about right for an engine upto stage 3

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26-06-2005, 03:31 PM

Kevin B

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Thanks for the replies

I should have said it was -10psi, and its a standard engine (compression etc), so it sounds like its OK

Cheers

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26-06-2005, 03:49 PM

DAN P

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mine sits on -10.5 m8 on tick over

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27-06-2005, 07:44 AM

Kevin B

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Quote:

Originally Posted by Guinnless

Sounds like you have a leak. Should be around 18 in/Hg.

Thinking about it the diaphragm (sp?) in the standard re-circ dump-valve is split (ticks over at about 1200rpm at the moment) so will have to see what it sits at with the dump-valve removed, my brothers RS Turbo shows 18 in/Hg...

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27-06-2005, 07:49 AM

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How much vacume should standard Saph make?

How much vacume should standard Saph make?

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