Returnless Fuel Module Observations
12-12-2006, 11:39 PM
#22
Originally Posted by 4.8T
not to sure how i would make one of those. didn't you say you hooked something to something else and it filled the bucket better. or something like that. 
07-07-2007, 12:10 PM
#24
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Originally Posted by DrX
The impression I get is that the truck modules perform a little better. Haven't seen one up close but it looks like the regulator setup is different. If the venturi pump is driven off the regulator rather than the pump, then you wouldn't lose that important feature of the factory module by upgrading to a Walbro. I would like to see some pics of the module and stock pump out of a truck.
I'll get some posted up later tonight.
07-07-2007, 12:52 PM
#25
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Here's the filter and reg out of my truck
Looks like the regulator dumps fuel back into the tube that leads to the venturi. What if you took all this stuff out of the bucket, and ran an outside reg, then ran the return directly back into the venturi tube?
Disassembled for clarity. (maybe)
04 connector
03 connector, maybe the same as f-body
Big size difference from 03 (small one) - to 04 (big one)
Remember, these are disassembled at some stage
Looks like the regulator dumps fuel back into the tube that leads to the venturi. What if you took all this stuff out of the bucket, and ran an outside reg, then ran the return directly back into the venturi tube?
Disassembled for clarity. (maybe)
04 connector
03 connector, maybe the same as f-body
Big size difference from 03 (small one) - to 04 (big one)
Remember, these are disassembled at some stage
07-07-2007, 03:32 PM
#26
Good pics. Confirms what appeared to be the case from other pics I have seen. The waste from the FPR drives the venturi pump so that function is not lost when you do the Walbro pump swap. This is why the trucks perform better than the Avalanches after the swap. Looks like your plan for a return style conversion might work with this bucket style. Will also give you more reserve if the filter was on the inside of the bucket.
What are the dimensions of that 04 bucket(height, diameter)? Center to center of the 2 rods?
Any pics of the bottom outside of the 04 bucket? Shots looking down into the empty bucket?
What are the dimensions of that 04 bucket(height, diameter)? Center to center of the 2 rods?
Any pics of the bottom outside of the 04 bucket? Shots looking down into the empty bucket?
07-08-2007, 10:34 AM
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Actually, the little nipple on the fpr looks to be a vacum nipple, like it's the same one used up on the rails, on the earlier models. Nothing connects to it in this instance.