DIY : PTFE line- tank to HPFP + inline fuel filter upgrade

[CantSitStill]

Interesting. Are you talking about just pump gas? I use meth that outputs a signal to the dme to up the timing to 10 degrees and 25-26 psi. Been running that for about a year but occasional use.

Meth off 21 psi, meth on and 25psi

100% meth 1400cc/min. Port injectio

datazap.me | Stuie1982 | Wedge v10

datazap.me

 

[martymil]

boost is boost doesn't matter about fuel type, occasional use will help make it last longer but it's only a ticking bomb of when.

When running perfectly it helps but when things go wrong like missfires and cylinder shut downs can really hurt and engine
quickly at anything over 20 psi.

 

[CantSitStill]

Based on the dyno I don't think I'm pushing it but probably near the limit. 500whp should be fine on a stock block, 600whp pushing it, 700whp won't run for long. 600whp is where I'm at with the meth. The meth, especially port meth should help over pump for sure. I would rather run boost than loads of timing or a mix of both. End of day its all about cylinder pressures

 

[E90TT]

Good info here. Thank you!

 

[proboner]

Is there theoretically any need to re-tune after performing mods of this nature?

 

[NoGuru]

Is there theoretically any need to re-tune after performing mods of this nature?

No, you should not need a re-tune.

 

[kulixo]

I just finished some fuel upgrades and wow what a difference.
Can really recommend this for anyone else struggling like I was.
Was running something similar as suggested (AN6 with inline filter from tank, drilled fuel rail, removed HPFP filter and bypassed in-tank filter) but was still struggling to maintain good pressure, even when running a Walbro 535 + one 450.

Decided to build a completely new system:
- Catch tank with Walbro 535 + 450.
- Stock fuel pump to feed catch tank
- AN8 lines from catch tank, splitted into 2x AN6 for HPFP and PI.
- Inline filter
- External FPR

Finally the pressure doesn't ever fall below 70psi, and this is with a single 535. The 450 is not even needed anymore.

 

[proboner]

I just finished some fuel upgrades and wow what a difference.
Can really recommend this for anyone else struggling like I was.
Was running something similar as suggested (AN6 with inline filter from tank, drilled fuel rail, removed HPFP filter and bypassed in-tank filter) but was still struggling to maintain good pressure, even when running a Walbro 535 + one 450.

Decided to build a completely new system:
- Catch tank with Walbro 535 + 450.
- Stock fuel pump to feed catch tank
- AN8 lines from catch tank, splitted into 2x AN6 for HPFP and PI.
- Inline filter
- External FPR

Finally the pressure doesn't ever fall below 70psi, and this is with a single 535. The 450 is not even needed anymore.

It just feels like going full DI delete is cheaper, simpler, and easier at this point