is the high pressure better than just the regular 255? or should i say which would be better for my set up:

built/sleeved FI h22 motor, plan on making 575whp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22eh2 &raquo;</TD></TR><TR><TD CLASS="quote">

is the high pressure better than just the regular 255? or should i say which would be better for my set up:

built/sleeved FI h22 motor, plan on making 575whp</TD></TR></TABLE>

1. Search (there was a topic on this just a few days ago)
2. High pressure
3. I know people have pushed this much power with a walbro but its going to be pushing it awful close (especially on the less efficient H-series motor). Wouldnt you rather have some breathing room? I think that much hp you might start thinking about a good inline. Just my opinion tho.

 

anyone else?

 

 

That high pressure post was from me a few days ago. Get the high pressure one. From what was said, both HP and HFlow, will flow the same amount of pressure until X mount of pressure, lets say 65-70psi. But after that the high volume will start to fall back, and the HP will keep going. Thats what i was told. Hondata told me High Volume, but i think ill trust the Tuners on this board

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1SlowSi &raquo;</TD></TR><TR><TD CLASS="quote">That high pressure post was from me a few days ago. Get the high pressure one. From what was said, both HP and HFlow, will flow the same amount of pressure until X mount of pressure, lets say 65-70psi. But after that the high volume will start to fall back, and the HP will keep going. Thats what i was told. Hondata told me High Volume, but i think ill trust the Tuners on this board</TD></TR></TABLE>

I don't know if you said the same thing, but basically the HP version at X amount of flow will keep delivering the same pressure versus the regular version will start to drop off at a certain amount of flow. So yes for your needs you will need the HP version (if that is big enough for you like bomber said). GL

 

http://www.lightningmotorsport...h.htm A little tech deal we posted to answer this question.

 

The pump section (g-rotor) is identical for BOTH pumps.

The high pressure version has no pressure relief.

The 'standard' version has a pressure relief at ~80-90 psi.


at sub ~75-80 psi fuel pressure they will flow the same.


Jeffrey Atwood

 

Hey Jeff...what's up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lightning &raquo;</TD></TR><TR><TD CLASS="quote">http://www.lightningmotorsport...h.htm A little tech deal we posted to answer this question. </TD></TR></TABLE>

Nice little write-up and chart.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jefnes &raquo;</TD></TR><TR><TD CLASS="quote">The pump section (g-rotor) is identical for BOTH pumps.

The high pressure version has no pressure relief.

The 'standard' version has a pressure relief at ~80-90 psi.


at sub ~75-80 psi fuel pressure they will flow the same.


Jeffrey Atwood</TD></TR></TABLE>

This 100% accurate. If you run a higher rail pressure or a (GAAAH) FMU, get the HP one. otherwise, you won't need it.

Randy

 

You guys are all right about this and thats what HOndata said as well but every tuner on here says to get the high pressure fuel pump. If both pumps put out the same until X amount of fuel pressure, and the HP keeps going, then why not just get the HP? When would you get to 80-90psi of fuel pressure, and is that relief in the high volume a good thing to have?