WEll I got my setup together and running. I had this 4 port running NA for about 15kmiles after I rebuilt it. I put in FD OPR, shimmed the front OPR, webber carb jets and ported it. It never smoked in NA form.

Since then I did a big project, wired up my wolf3d, put my stage 3 BNR turbo on, full racing beat exhaust. Now whenver I leave the car idling for like 5min oil starts being burned.. blue smoke out the exhaust. If i start driving it, it all goes away and clears up. The thing is my plugs start getting fouled when its smoking like that, so oil is getting into the engine. Like today I was sititng at the light and it was a long light, smoke starts pouring the exhaust, light turns green we drive off.. no smoke.

I saw to do some test where you hold your engine at 5k rpms for a minute and then let off... I did that and there was no smoke at all. Now if its my OPR making too much PSI for the hybrid turbo, how come it doesnt smoke when im driving and the oil pressure is higher?

Thanks

 

its the turbo

 

I remember reading somewhere that the FD OPR is too high for the FC

 

Must of the time turbo just dump the oil out the exhaust. Mine goes into the engine and ***** up my spark plugs.

 

did you ever find out what was causing this? I've got a bnr stage III as well and mine does the same exact thing, even after the oil restrictor was put in.

 

Its the turbo, Ive talked to Bryan at BNR is either your crankcase not ventilating, or your turbo is seeing too much oil pressure.

 

Oh btw, Im having this same problem

 

I just searched and found that somepeople put vacuum to the oil pan by putting a check valve inplace between the manifold and upper nipple of the oil filler neck. THey said it worked perfect. I'm going to try this

 

check this thread out, and I also saw about 3 or 4 other threads mentioning this same fix.

https://www.rx7club.com/showthread.p...ight=bnr+smoke

 

I have my oil line restricted, and a vacuum line running from crank case to TID which pulls vacuum... and damn thing still smokes sometimes. It doesnt really do it whent he car is cold but when it starts warming up and im at a light.. SMOKE a lot.. just pouring out, then i revv it and it stops. If I drive it around for a while and its all warmed up I'd have to idle it for a really long time for it to start smoking again. Im pissed.. you know how ghetto it is to be sitting at a light and ppl have their windows down and ******* smoke (a lot) just all the sudden BAM all over the place.

BNR said to restrict the damn oil line some more, but I dont know. I'm going to a T61 turbo as soon as I get back from basic training and tech school. I had enough of this ****.

 

Is there some sort of write up for this?

 

it should be real easy, just by a check valve from the parts store and run vac line from any vac source to the upper nipple of the oil filler neck. But in the line of the vac line place the check valve only to enter the engine on vacuum and the check valve will shut on boost.