EFR6258, 1884cc BP6D, 415whp/343wtq

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Dec 28, 2017 | 11:39 AM

#41

patsmx5

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From: Houston, TX

Quote:

Originally Posted by ridethecliche

Can this thread plz not devolve into an oil thread?

Greg, any particular reason you chose not to use shims on the stage 2 pump? AFAIK it comes default with 2 of them to increase oil pressure a bit. Wouldn't that have helped with the VVT at lower rpms?

No, shims would have no affect on pressure below the relief valve pressure.

Dec 28, 2017 | 12:12 PM

#42

1993z32

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TheCarPassionChannel

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From: San Diego, Ca

Quote:

Originally Posted by patsmx5

No, shims would have no affect on pressure below the relief valve pressure.

They just raise the max pressure allowed, correct?

Dec 28, 2017 | 12:51 PM

#43

18psi

VladiTuned

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Perhaps you've got loose clearances/tolerances and it takes the pump a tad longer to catch up. Got an oil pressure gauge?

Dec 28, 2017 | 01:04 PM

#44

1993z32

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From: San Diego, Ca

Quote:

Originally Posted by 18psi

Perhaps you've got loose clearances/tolerances and it takes the pump a tad longer to catch up. Got an oil pressure gauge?

Just the stock 1.6L setup. I've got an aftermarket OPS but it's not wired up to MS yet.

Dec 28, 2017 | 01:24 PM

#45

18psi

VladiTuned

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Just for reference:
Here's a fully built vvt BP with EFR6758 I recently tuned also running the boundary pump. Has no problem hitting target

Dec 28, 2017 | 01:28 PM

#46

patsmx5

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From: Houston, TX

Quote:

Originally Posted by 1993z32

They just raise the max pressure allowed, correct?

Correct. The relief valve is functionally the same as a wastegate on a turbo. Limits max pressure possible.

Dec 28, 2017 | 02:45 PM

#47

sixshooter

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From: Tampa, Florida

Quote:

Originally Posted by ridethecliche

Greg, any particular reason you chose not to use shims on the stage 2 pump? AFAIK it comes default with 2 of them to increase oil pressure a bit. Wouldn't that have helped with the VVT at lower rpms?

Quote:

Originally Posted by patsmx5

Correct. The relief valve is functionally the same as a wastegate on a turbo. Limits max pressure possible.

^What Pat said. They make no difference below max pressure.