R32 GTS (RB20DE) Injectors Replacement

[GabsReDeal]

On 06/06/2025 at 1:21 AM, GTSBoy said:

Stock RB fuel pressure is near enough 43.5 psi, so the latency in that table at 31.6 will be close. You can see that 7 or 8 psi equates to about 0.4µs extra latency. So if you wanted to interpolate between the 31.6 and 39.9 psi values you could say you're going up about 2 psi out of those 8, so add about 0.1µs, which is barely worth talking about and is quite possibly wrong because ideally you would fix the latency while running at the appropriate conditions on the dyno, with a wideband sniffing its butt.

Yes I was planning to get it to a tuner with a dyno, but they told me to wait till September because the heat really started now and it is not ideal to do it in this heat.

Edited June 10 by GabsReDeal
Changed October to September

[GabsReDeal]

It seems that after 3 days of usage, it started missing again on one cylinder. Then eventually stopped missing but was stalling after a few minutes.

The spark plugs, injectors, and fuel pump are all alright. So I am considering the tune might be wrong. Weirdly enough though, it took 3 days of running perfectly for it to start giving issues.

On 06/06/2025 at 1:21 AM, GTSBoy said:

Stock RB fuel pressure is near enough 43.5 psi

Just an FYI, the fuel pump which is stock is constantly 3 Bar (43.5 psi). So you were absolutely spot on.

[GTSBoy]

4 hours ago, GabsReDeal said:

the fuel pump which is stock is constantly 3 Bar (43.5 psi)

That's a function of the fuel pressure reg, not the pump. The pump can do more, needs to be able to do more. The reg keeps the pressure in the rail constant above whatever the manifold pressure is.