ITT you may discuss the need for a dual feed fuel rail
#1
Tour de Franzia
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
ITT you may discuss the need for a dual feed fuel rail
I'd love to save some cash on fittings and do a single-feed style rail with my M-tuned rail. Do I really need to feed from both sides?
These pics suggest that #2 and #3 were hotter, I'm not sure if it's a coincidence considering the feeds are near # 1 and #2:
[/img]https://lh5.googleusercontent.com/-eoJrLZZF5rU/TpbgfG3zefI/AAAAAAAAAds/UnYvGJtCU7o/s800/IMAG0087.jpg[/img]
What do you gays think?
These pics suggest that #2 and #3 were hotter, I'm not sure if it's a coincidence considering the feeds are near # 1 and #2:
[/img]https://lh5.googleusercontent.com/-eoJrLZZF5rU/TpbgfG3zefI/AAAAAAAAAds/UnYvGJtCU7o/s800/IMAG0087.jpg[/img]
What do you gays think?
#4
the problem i see is making the assumption that under the boost, those cylinders are running hotter. what you're looking at is the evidence of what was happening while cruising at low load for hours, weeks, months, because, that is mainly what you do. to be able to tell what was happening under a heavy load, you would have to start with scrubbed clean combustion chamber valves, pistons, plugs, etc.... then start it, run the track hard and cut it off as you pulled in the pits. then pop the head off and have a look see. it could be said that if it's happening while cruising (leaner in 2&3) it's probably the same under load, but that's just not always the case. the flow of fuel and air @ 15psi wot in 4th, is drastically different than at 15% throttle, in vacuum, cruising in 6th
it'd be nice to have if your made of money, but i don't believe it's necessary at your planned power levels.
it'd be nice to have if your made of money, but i don't believe it's necessary at your planned power levels.
#15
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,103
When Tim built me my .500"ID stainless rail, we were less worried about dual feed and more worried about making the ID as big as possible.
If I ever redo fuel lines, I will probably cap my 2nd feed and just do a single feed/return.
#16
Elite Member
iTrader: (21)
Join Date: Jun 2007
Location: Rochester, NY
Posts: 6,623
Total Cats: 1,277
Mine came with the SC package I bought. Will I use it? Sure. I have it, might as well put it on when I do the injectors. But if I didn't already have it, I'm now convinced that it really isn't necessary.
#17
Tour de Franzia
Thread Starter
iTrader: (6)
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,085
Total Cats: 375
Cool, I'll save a lot of money. Not enough for an AFPR from Fuel Lab, but enough to take your slore girlfriends out to my apartment and watch them clean my penthouse apartment.
#18
I think everyone is looking at this the wrong way. Cylinder heat is a function of the heat generated and the heat dissipated. It seems unlikely that fueling is causing any real difference in cylinder temps, so could it be heat rejection differences? I assume you have rerouted the coolant flow, and put in a properly beefy cooling system? In essence, why would those cylinders reject less heat than the others?