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Good write up...
its almost an exact copy of the system I use in my GC.
I built mine all out of copper, so no ethanol fuels for me!
I think I worked out my surge tank is 250mm length of 80mm copper pipe with two copper endplates (3mm thick) brazed on. Its volume works out to be about 1.2L...I worked out its about 20 sec at full thottle, with no lift pump working.
I use a Bosch (dunno what model) out of a Falcon EFI wagon (about 1600-1800cc/min) the lift pump is a 929 '85 carburetor electric pump...Which I estimate is good for about 900cc/min
The only thing I did differently is the surge tank to main tank return line draws from the top side, not the top...I had some theory about keeping an air space in the surge tank (a small one) but I cant remeber what basis I used for the theory!
One problem I have always had tho...As the surge tannk is in the boot space the car always has a slight smell of fuel vapour in the boot....I pressure tested the system with compressed air for leaks before it was installed....And there have been no evidence of leaks in the last 8 years of use...I put it down to vapours permeating the small amount of rubber hose used to connect the tank to the rigid lines....most of my lines are 8mm copper, all except the last bit to connect to the surge tank, which would be about 150-200mm of rubber
I dont know if anyone else has experiance this phenomenon....but I found a bit annoying, and have been concerned a bit about the safety aspect...
but I am pretty sure that there isnt enough vapour to be ignition worthy, even if parked in the sun on a hot summers day.
A few times I have thought About changing the dimensions of the surge tank so I can fit it under the car...for instance a 150mm dia, 150mm tall tank...
Sure the anti suge properties wouldnt be as good, but I could braze in an internal baffle out of copper plate...
But Its just something I have never got around to.
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