walbro 255 pressure at the rail..........?

[redhardsupra]

That does seem high to me. Are you using the factory wiring or a beefed up setup like the racetronix? The tutorial is really good. From my observations/ logs with the autometer setup I have observed ~62-64 @ idle and ~58 @ WOT. It does vary with load, which makes sense. Probably worth your while/wages to get more accurate readings you can actually log. Look at it this way, you can fire the small Laotian boy you have under the hood watching the gage while you drive.

how does your fuel pressure hold up on wot at lower vs high rpm? do you have any logs with this stuff logged?

[mr.prick]

no i just have a gauge tapped in the fuel rail.
it drops to about 68psi under throttle, and idles at 70psi.
i imagine the lower value is probably the one i should use for
the IFR table.

[Doc]

LOL
i have just the pump.
now i`m wondering whats is going on with my fuel pump.
guess i`ll have to spend more money

No kidding, I started out with the Racetronix kit and then hooked up the Autometer gage and crapped my pants when I saw the first readings. My alternator (stock) was not up to the task of supporting my LC-1, N20 stuff. This lead to a bigger, better, more expensive alternator.

http://www.alternatorparts.com/Extre...144%20type.htm

Only catch with this puppy was the CS-144 case style. It fits no problem. The holes for the mounting hardware are another story. A really good friend, (screen name tunedportCJ5 on this board) helped me make a custom bracket to accomadate it.

[Doc]

how does your fuel pressure hold up on wot at lower vs high rpm? do you have any logs with this stuff logged?

Sure, I am at work right now and I didn't bring my laptop today. Do you mean "How does FP hold up when going to WOT from low rpm VS. High?"
Sorry, I've got a bunch of whiney Engineers crying right now.

[redhardsupra]

yea, according to my calculations a walbro 255 should be running out of flow on higher rpm's, i wonder how visible it is, and also i wanna see if i could estimate the dynamic pressure, as the fp sensor only captures static one.

[BowlingSS]

Will EFIlive check fuel rail pressure without special gauges?

Bill

[Doc]

Will EFIlive check fuel rail pressure without special gauges?

Bill

Look in the tuning tool under Help> Tutorials>LS1 FP sending unit

Not that hard.

[BowlingSS]

Look in the tuning tool under Help> Tutorials>LS1 FP sending unit

Not that hard.

Thanks.
Bill

[billyjo]

RHS,

I have several logs with fp data @ the rail and I'm using a 255. I've also got an Aeromotive fp regulator after the rails to try and control the fp, and if it makes a difference mine is also super charged.

Bill

[mr.prick]

RHS,

I have several logs with fp data @ the rail and I'm using a 255. I've also got an Aeromotive fp regulator after the rails to try and control the fp, and if it makes a difference mine is also super charged.

Bill

well what is your fuel pressure!