BK's eternal money pit build - 1989 R32 GTR single turbo

[Michele]

On 9/3/2022 at 1:39 PM, Dose Pipe Sutututu said:

I'm still wondering if Xtreme GT-R is using a RB25 NEO head OR just adapted a NEO VCT to a RB26 head.

Custom VCT to RB26 head 👍

[Dose Pipe Sutututu]

24 minutes ago, Michele said:

Custom VCT to RB26 head 👍

Had a feeling, that RB25 NEO cam gear gave it away haha

[r32-25t]

I doubt anyone’s removing a better flowing 26 head for something with much smaller ports 

[BK]

Nothing to specifically update here, but just putting k's on car and it's been flawless. The turbo elbow hose failure has been about the only recent issue with the car. I'm still running a silicone replacement until I can be bothered to pull the turbo compressor off and weld a proper cast alloy elbow on for a permanent fix.

Apart from that - no complaints. Still love the 2.8 / 6466 combo, the PAR box has so far proven to be very good and couldn't be happier with the entire engine management side using the current fuel system and Ross crank trigger setup all controlled from the Elitec 2500. The Ross trigger with the GT101 hall effect sensors I absolutely rate 10/10, unlike the heap of shit NZ wiring cam trigger on the white 32. I will elaborate on that later, but they are no replacement for a real crank trigger setup.

Found a few pics from when I was moving away from the Bosch 044s to the AEM setup with upgraded 10mm2 wiring, 2 x 400lph staged externals, dual speedflow check valves and 340lph lift pump all throungh AN8 200 series lines, basically binning the existing mismatched and poorly installed Willall racing setup. I really expected better from them as their setup caused me nothing but dramas. Note the new pump power supply 10mm2 wiring in comparison to 2.5mm2 existing - big difference.

Next thing on the agenda was to fit the Turbosmart OPR T40 turbo oil reg. I've been putting it off because of the fittings and stuff I had to figure out that was required for install, and I'm glad I hadn't fitted it yet. OPR T40 won't be going on, ordered 2 of these below today and will be removing the T40 from the white 32 too.

https://www.turbosmart.com/product/opr-v2-turbo-oil-pressure-regulator/

[Dose Pipe Sutututu]

Modernisation of pumps, less heat, less noise.

Yeah I'm going to rip off my v1 OPR valve too at some stage and replacing it with the V2 OPR to reduce the hose clutter!

[BK]

32 minutes ago, Dose Pipe Sutututu said:

Modernisation of pumps, less heat, less noise.

Yeah I'm going to rip off my v1 OPR valve too at some stage and replacing it with the V2 OPR to reduce the hose clutter!

I actually think the old T40 on the white 32 is increasing crank case pressure increasing breathing too.

Think about it - any oil pressure in excess of 40psi is being fed back into your sump pressurising it. Normally you only have your low pressure turbo oil return and block oil passages gravity feeding back to the sump. With the T40 you are adding potentially 60psi+ with a Nitto pump back into the sump - this can never be a good idea adding to crank case pressure.

[Dose Pipe Sutututu]

24 minutes ago, BK said:

I actually think the old T40 on the white 32 is increasing crank case pressure increasing breathing too.

Think about it - any oil pressure in excess of 40psi is being fed back into your sump pressurising it. Normally you only have your low pressure turbo oil return and block oil passages gravity feeding back to the sump. With the T40 you are adding potentially 60psi+ with a Nitto pump back into the sump - this can never be a good idea adding to crank case pressure.

Quite possibly, I agree with your theory on that one!

I probably don't see these issues with the other band aids on top (sump/head breather/drain, sump to catch can breather/drain).

[BK]

On 20/12/2022 at 10:19 AM, Dose Pipe Sutututu said:

Quite possibly, I agree with your theory on that one!

I probably don't see these issues with the other band aids on top (sump/head breather/drain, sump to catch can breather/drain).

White 32 has the head breather / sump vent and decent catch can setup but still retains the stock rocker cover baffles. I've always thought it breathes more since the T40 install, so will be interesting to compare. Definitely breathes more than the blue 32, which has all that mentioned above but additionally has the Mines rocker cover baffles and 2nd pre catch can acting as an oil / air separator but also doesnt have the T40.