| [GMCnet] New thread on vapor lock, carbs and EFI [message #282081] |
Tue, 14 July 2015 09:12  |
glwgmc
Messages: 1014
Registered: June 2004
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In all this talk about various ways to address vapor lock or related issues, I have yet to hear anyone discuss a front mounted surge tank like many aftermarket, high performance EFI units employ. Seems to me a gallon or so fuel canister mounted in the air stream up forward would overcome most fuel starvation and fuel heat issues. Plumb whatever fuel pump you use to supply that canister with a return to the fuel filler. Plumb whatever you use for a fuel pump supplying the carb or EFI to draw from and return to that canister and I think one would always have cool, liquid fuel going into the carb or EFI no matter what was going on aft of that canister. I see these things advertised all the time in the usual hot rod sources but have yet to hear much about them on this forum for our GMCs.
On a related note, for those of you who regularly drive in high altitudes, have you found any of the EFI systems to be demonstratively better than the carb? I know the carb will lack power at altitude as it will run way to rich if tuned for lower altitudes. We live at 1200 feet and regularly go down to zero or up to 4000 feet and occasionally to 6000 feet and in that range the carb seems fine. Above 6000 it struggles. As we occasionally cross the Rockies and run in the 8000 to even 10000 foot range I am considering EFI for one or both of our coaches. But, we don’t do that often enough to really justify EFI for that application alone. Both coaches run well with stock carbs and HEI ignition but what other gains might I see from EFI and which EFI have you found to offer the best combination of benefits?
Not looking to start a tire or oil war here, but I am perfectly happy to make the investment if there is a real payoff. We drive both our coaches a lot each year and I much prefer going than fiddling so simple and reliable are beneficial traits from my POV. The last thing I want is a laptop sitting on the floor connected to the EFI with me fiddling around with mixture settings while going down the road! Thanks for your comments and suggestions.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
glwork@mac.com
http://jerrywork.com
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Jerry & Sharon Work
78 Royale
Kerby, OR
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