2G Fuel pressure fluctuation

[CDgr97GSX]

No, 11mm is the OD of the outlet pipe. Depending on where you look, the outlet pipe is either given as 11mm OD or as 3/8" Hose barb. It's made for 3/8" hose. Nobody gives an ID for it.
1g users in here have been putting 3/8" hose on it. Take a look at Marty's pics here in post #278. In the first pic you can see (barely) that the hose says 3/8" and 9.5mm.
So yeah I don't know how all this would work out on a 2g. It's so crowded vertically.

It seems I miss calculated the inside diameter, I always have to convert to mm.
I'll buy one of this adapter, I've seen them on STM or Extremepsi website and once I have the pump out i'll try it. If I can keep the same length of the whole assembly then it's definitely a better option.

 

[CDgr97GSX]

In here it's usually agreed that the AEM stainless MAP sensors are the best ones and the most reliable. They are round barrel type.
3.5 bar if you aren't going to go over 35 psi of boost.
5 bar if you are going higher than 35 psi boost.

I've used them both. Lately I have the 3.5 bar on my car because I noticed I was getting spikes on my AFRatioEst plots in the logs. Didn't notice any bad behavior from it though. Anyway there's no spikes with the 3.5 bar.

AEM it's an option but I'm not sure what boost I will run so I can't say if 3.5 bar it's enough or not. I would say a 4 bar sensor would be the smart choice.

 

[We're on Boost]

I would say a 4 bar sensor would be the smart choice.

4-bar is kind of the ideal range, true. I wish AEM made their sensor also as a 4-bar.
If I had to buy a 4-bar here in the US, I would get the one sold by Ballenger.
They are as far as I know the only place that comes right out and says that the "genuine" GM type MAP sensors sold these days are lousy quality because of excessive cost cutting and moving production to low cost facilities.
The writeup they have for their 3-bar has this info in the Description.
The only actual experience I have with it though is the Ballenger 3-bar that OhhShmit put on his car about a year ago, and it's fine.
And of course the Un-genuine cheapo (like $20) GM sensors are usually not good either, I mean some of them might be accurate at first but then not last very long.

As far as I know, the OmniPower ones were good up until about 5 or 6 years ago. I had one on my car that was new in 2016 and it never failed, I just took it off preemptively because I hate roadside emergencies and that's what we started hearing from people. So I bought an AEM 5-bar in 2021, then bought the AEM 3.5-bar in 2023 and hope to be running that forever. All 3 of the MAP sensors I have had were remote mounted, not directly attached to the engine. That helps.

 

[CDgr97GSX]

I checked the AEM 3.5 bar sensor and honestly I don't like I have to use 2 adaptors and on top of that I have to do the wires too.
Omni power is plug and play