My car is a 1991 r32 GTR with 109,000km. Compression is 165psi across the board, except cyl-6 is 170psi. Upgrades are exhaust, and intake.
So my problem is that I have good idle oil pressure and good oil pressure up until 3000rpm. After 3000rpm the pressure never increases. Its as if the gauge just gets stuck. I checked with mechanical gauges, changed my stock sending unit, used a defi gauge, everything gave the same result. I have maximum 2.8bar no more. I read alot and I'm pretty sure its the relief valve, but also I read it could be bearings. If its bearings though wouldn't my idle pressure be wrong? Also I never get more then 2.8bar on a cold start.
I'm not sure what to do. I'm kinda of just leaning towards changing the oil pump to an N1, its a big job but I can do it at a buddies garage on a lift (hopefully within a weekend, or a day) and hoping my oil pressure is good after the swap. Then waiting until it blows completely and do a rebuild then. I'll probably also do the timing belt (and water pump) with the oil pump eventhough my timing belt is fairly new. I want to avoid a rebuild right now if I can, I barely driven the car since I bought it, also I have alot of parts waiting to be put in. I just don't want to put the parts in until I get rid of this issue.
Tell me what you think! Can it be the bearings also, what would you do?
Thanks in advance,
Mitch
So my problem is that I have good idle oil pressure and good oil pressure up until 3000rpm. After 3000rpm the pressure never increases. Its as if the gauge just gets stuck. I checked with mechanical gauges, changed my stock sending unit, used a defi gauge, everything gave the same result. I have maximum 2.8bar no more. I read alot and I'm pretty sure its the relief valve, but also I read it could be bearings. If its bearings though wouldn't my idle pressure be wrong? Also I never get more then 2.8bar on a cold start.
I'm not sure what to do. I'm kinda of just leaning towards changing the oil pump to an N1, its a big job but I can do it at a buddies garage on a lift (hopefully within a weekend, or a day) and hoping my oil pressure is good after the swap. Then waiting until it blows completely and do a rebuild then. I'll probably also do the timing belt (and water pump) with the oil pump eventhough my timing belt is fairly new. I want to avoid a rebuild right now if I can, I barely driven the car since I bought it, also I have alot of parts waiting to be put in. I just don't want to put the parts in until I get rid of this issue.
Tell me what you think! Can it be the bearings also, what would you do?
Thanks in advance,
Mitch