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-   -   is this normal? (https://www.miataturbo.net/megasquirt-18/normal-41763/)

Dlaitini 12-04-2009 05:41 PM

is this normal?
after starting up the car my MAP is around 33 kpa, then slowly drops to around 26 after it is fully warmed up

I'm also getting a little bit of oil smoke at startup, but im thinking because i dont have a restrictor for the turbo, possibly the oil pressure is peakign at 90psi its pushing past the seals? It too is fine once warmed up

i dont think that the weather here (salt lake - 10F last night) is a factor except in the amout of time it takes to get up to temp

Braineack 12-04-2009 06:00 PM

during ASE, itll stick to a certain MAP then decay out. tune it.

if its a new turbo install it will smoke a bit.

Dlaitini 12-04-2009 10:30 PM

the turbo has been installed for about a year and a half now, the head was off last feburary and had new valves and valve guides installed, they and head machined to match , and 4 brand new pistons installed (bent intake valve and hole in piston 4 made this possible)

would the high oil pressure when cold (90psi on the stock guage) push oil past the seals? i have the begi-s kit so the sensor is reading off the same place that the oil feed for the turbo is. Its only for the first 10 secs or so. Ill check later, after the car has sat, to see if im getting oil in the combustion chamber from something else leaking.

im just hoping there is not another bent valve, i have few posts a long while ago that had me askign about really rough runnign till the car had hit exactly 160 degrees not sure whay it happened at that exact temp, so far this has not started to do that (hopefuly its something much easyer to fix) but ill also do a compression check and see if thats affected too.


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