572

[M4wdFab]

keep an eye out for a smacked up fleet van with a 6.0 also!

[JEEPWERX]

http://m.summitracing.com/parts/aei-18309?seid=srese1&gclid=CN2IjpLo-8MCFbBj7AodklIA0g
Spendy but sounds like it cures all.
Any other options out there?

[M4wdFab]

i think my current system is fine- i just need to find the problem.  i chose to use one vented walbro, which may have been a mistake based on lack of research.

i also added 1 cubic foot of foam before KOH which could have disrupted internal plumbing. 

once the plow truck burns all the fuel in the cell, ill remove and dissemble the entire cell.  rebuild with all new parts, and put a renduant pump / filter system in as backup. 

[M4wdFab]

yeah for having to pull RCVs and send them back again

[JEEPWERX]

F that product

[M4wdFab]

Race prep list

Dissasemble fuel system- replace / clean as needed.  still having power issues after sustained WOT
Rear Fox shock and bumps instal
tree bars
nut and bolt car
adress leaking tires
eval air filtration / make mud guard
trailer prep

[M4wdFab]

found a level of IB and jim bean Maple that allowed me to do some fuel system work tonight while Matt and Joe prepped 928



Found RCI cell internal hose disintegrated at walbro tee, sucking air 5" above bottom of cell.  This was our running out of fuel at 22gallons used issue at KOH.

All foam removed and cut into smaller pieces.  hose replaced with some other upgrades.  Walbros in good shape.

Fuel system no bubbles with 4 gallons in the cell now. 




Car race prepped, bolt checked, fluids, front shocks bumped up 1" ride height and dual rates lowered 1"   

[mr.mindless]

Rci-supplied hose? The normal fuel injection rated stuff we use should be submersion rated but who knows what they use. Crappy, but good it was obvious and easily fixed.


Tapatalking in traffic

[M4wdFab]

yes RCI supplied hose.  looks like it was standard trans cooler type hose with a push connect AN at the top connected to the bulk head fitting though tank.  i suspect the hose is not rated for ethanol like there foam and cell gaskets aren't.


regular PFI hose is NOT submersible.  The ethanol rated coating inside the hose is very thin and weak, strengthened with a not rated external fiber reinforced shell.

rubber submersible hose is very expensive, like dollars per inch- i used some to connect my walbros inside the cell.  it was in great shape. 

[M4wdFab]

571 and 928 should have all aluminum hard pickups of it recall

[mr.mindless]

My foam is still bagged in a cabinet, and I'm not racing any u4 this year, so I might confirm that next winter?

[M4wdFab]

ran 30 miles like a rapped ape.  loved front shock mounts in the trees.  shock preload and dual rate adjustments were massive improvements.  limped 10 miles to finish 40 miles


barely wanted to climb trailer fenders tonight to unload.  at least the problem is still present.  going to tear into fuel system- pull and flush injectors, change pump, check cell pickups again. 

install fuel pressure gage





man this thing is dirty i hate mud races. 

[mr.mindless]

install fuel pressure gage.

Step 1?


Tapatalking in traffic

[M4wdFab]

probably! lol

i think i can just screw one on the rail schrader port

[gif]

probably! lol

i think i can just screw one on the rail schrader port

does the ECM make any fuel decisions?     Limp mode?