[Dynamic_m235]

Few questions before I get/install my PI kit from BMP
Mods: fbo, bov, Pr coils, ngk plugs, bm3 custom tune

1- do I NEED an lpfp paired with this
2- I will be running 93oct, how does this do with pump gas?
3- anything you guys can tell me general knowledge & use would be great

[jb-slow]

All that on a stock turbo?

[Dynamic_m235]

Originally Posted by jb-slow

All that on a stock turbo?

Yes

[jb-slow]

Why? You don't need port injection or a fuel pump on pump gas and a stock turbo. Are you going to get a bigger turbo or switch to ethanol down the road?

[Dynamic_m235]

Originally Posted by jb-slow

Why? You don't need port injection or a fuel pump on pump gas and a stock turbo. Are you going to get a bigger turbo or switch to ethanol down the road?

I'm going bigger turbo down the road but I'm having problems with my car and we can't decide if it's the injectors going or my stock fuel pump isn't keeping up so we figured we'd kill two birds with one stone using the BMP pi kit that comes with 750cc injectors

[mikeysosa]

Originally Posted by Dynamic_m235

I'm going bigger turbo down the road but I'm having problems with my car and we can't decide if it's the injectors going or my stock fuel pump isn't keeping up so we figured we'd kill two birds with one stone using the BMP pi kit that comes with 750cc injectors

You definitely are going to need a bigger fuel pump if you're running that setup on your stock pump. The LPFP is one of the first bottlenecks that people run into; and that's without PI. I suggest Fuel-It! Stage 2 LPFP and definitely their new lines compatible with E85. And if you aren't running E85 with your port injection, just forget it because not only is it highly unusual, but you will see much better gains with E85 as opposed to 93.

[Dynamic_m235]

Originally Posted by mikeysosa

You definitely are going to need a bigger fuel pump if you're running that setup on your stock pump. The LPFP is one of the first bottlenecks that people run into; and that's without PI. I suggest Fuel-It! Stage 2 LPFP and definitely their new lines compatible with E85. And if you aren't running E85 with your port injection, just forget it because not only is it highly unusual, but you will see much better gains with E85 as opposed to 93.

I'm thinking about running e30 but for now all I'm worried about is just being able to drive my car without hard studders. I was thinking about the stage 2 lpfp but I wasn't sure if it was 100% needed. All that info was more than helpful🙏🏽

[jb-slow]

I think you should fix the original problem before you start complicating the system further, start from a 100% functioning car so you won't have any bigger problems later, the headaches could be huge. If the injectors are the issue then port injection will only be a temporary band-aid, it'll keep getting worse.

[mikeysosa]

Originally Posted by jb-slow

I think you should fix the original problem before you start complicating the system further, start from a 100% functioning car so you won't have any bigger problems later, the headaches could be huge. If the injectors are the issue then port injection will only be a temporary band-aid, it'll keep getting worse.

I 100% agree with this statement, it will save you in the long run so you don't have to go back and test every single possibility when something goes wrong.

[Dynamic_m235]

Originally Posted by jb-slow

I think you should fix the original problem before you start complicating the system further, start from a 100% functioning car so you won't have any bigger problems later, the headaches could be huge. If the injectors are the issue then port injection will only be a temporary band-aid, it'll keep getting worse.

If this info helps, I bought the m235 as a stage 2 dinan m235 that was built from factory. Previously I had a regular m235 fbo Bm3. So I swapped the tunes, put in Pr coils and did ngk .020 plugs then the problem started. I was running ots 93 stage 2. Now I'm custom tuned on stock coils and plugs and the problem is still there. I'm also thinking about getting the dinan lpfp since I can get in on affirm like I did my PI kit. I can't find any reviews on it though. Do you know anything about it?

[jb-slow]

Originally Posted by Dynamic_m235

If this info helps, I bought the m235 as a stage 2 dinan m235 that was built from factory. Previously I had a regular m235 fbo Bm3. So I swapped the tunes, put in Pr coils and did ngk .020 plugs then the problem started. I was running ots 93 stage 2. Now I'm custom tuned on stock coils and plugs and the problem is still there. I'm also thinking about getting the dinan lpfp since I can get in on affirm like I did my PI kit. I can't find any reviews on it though. Do you know anything about it?

I didn't even know they made one

[Dynamic_m235]

Originally Posted by jb-slow

I didn't even know they made one

https://www.dinancars.com/products/e...arts/R420-0002

Yea barely anything on it

[designatedposter]

with stock turbo, i have never read that it is limited by lpfp or injectors. usually is the hpfp cannot keep up once ethanol is introduced like e30 and running 'stage 2' ots tunes.

can you post logs and describe the problem you are having.

[Dynamic_m235]

Originally Posted by designatedposter

with stock turbo, i have never read that it is limited by lpfp or injectors. usually is the hpfp cannot keep up once ethanol is introduced like e30 and running 'stage 2' ots tunes.

can you post logs and describe the problem you are having.

https://www.bootmod3.net/log?id=5fb8...0b4379ce9a2d47

https://www.bootmod3.net/log?id=5fb8...729b0be1c1ae79

https://www.bootmod3.net/log?id=5fb8...90c64d73a0a612

These are the last logs I took and this was a while ago. Basically since I swapped what I said up there^ I've been having a misfiring/studdering problem and it wasn't horrible but now it happens every second. I've tried getting custom tuned, swapping some parts oem and getting new ones as stated above. All types of tests have been done, nothing shows and barely any codes except for a few lean codes

[designatedposter]

Originally Posted by Dynamic_m235

https://www.bootmod3.net/log?id=5fb8...0b4379ce9a2d47

https://www.bootmod3.net/log?id=5fb8...729b0be1c1ae79

https://www.bootmod3.net/log?id=5fb8...90c64d73a0a612

These are the last logs I took and this was a while ago. Basically since I swapped what I said up there^ I've been having a misfiring/studdering problem and it wasn't horrible but now it happens every second. I've tried getting custom tuned, swapping some parts oem and getting new ones as stated above. All types of tests have been done, nothing shows and barely any codes except for a few lean codes

logs definitely show the HPFP is deviating from target starting when you overboost to ~19psi (from target 17 psi). this is expected since the stock HPFP is known to be at the limit at these boost limits.

why did you or your tuner think it was the LPFP or injectors?

[Dynamic_m235]

Originally Posted by designatedposter

logs definitely show the HPFP is deviating from target starting when you overboost to ~19psi (from target 17 psi). this is expected since the stock HPFP is known to be at the limit at these boost limits.

why did you or your tuner think it was the LPFP or injectors?

Well the problem got progressively worse. He didn't say specifically it was that, I'm just doing the pi because it's cheaper right now. Not trying to spend $1800 on the hpfp when I could get the pi system and 750cc injectors for $700

[Boostleak235]

Originally Posted by Dynamic_m235

Well the problem got progressively worse. He didn't say specifically it was that, I'm just doing the pi because it's cheaper right now. Not trying to spend $1800 on the hpfp when I could get the pi system and 750cc injectors for $700

Think everyone was trigger happy going for LPFP early on because it was the weak link and answer for N54. HPFP in reality seems to be the 1st limitation, but that hype train didn't take off until the B58s and Supras got the ball rolling for us with that R&D. It's a win for us in the end. Sure, you'll eventually want to go to at least stage 2 LPFP, so not saying it's pointless. Buy nice or buy twice.