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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.


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Old 03-07-2008, 10:48 AM   #1
FerociousP
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Default 6p turbo LOW OIL PRESSURE!

This is updated from the other forum where originally posted...

motor:

- s5 6port turbo conversion
- s5 n/a block, stock s5 t2 everything else
- oil feed line taken from aftermarket oil pedestal
- tapped n/a cover for stock turbo oil return
- autometer sport comp elec. gauge in stock location
- mech oil pressure gauge in pedestal

problem:

Oil pressure upon initial startup of the motor was around 28-30 psi at idle and above 50psi at rpm. as motor warms up, oil pressure declines.

startup cold:

25 psi at 800rpm, 50 psi when I rev.

hot driving:

30-35 psi at 2k, 40-50psi from 3k on.

hot idling:

0-10 psi at 800, 15-20 psi at 1200.

Other:

- oil psi does not decrease (just stops around 50psi) at higher RPM
- 20w50 Castrol conventional
- Pure-one oil filter
- gauge wiring has clean, tight connection


mech gauge tested... pressure on the electric gauge accurate,
mech gauge shows 10psi at idle

oil is a grayish color, similar looking to antisieze (for threads) but darker and without being shiny... Is that a telltale sign of anything??






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