You didn't see the post about the Turbo EFI ? from Hollow Head?



http://www.y-blocksforever.com/forums/Topic14314-3-1.aspx?Highlight=turbo+efi



its amazing. I am just doing megasquirt II + TBI

And, of course, direct fuel injection puts the fuel exactly where it's needed in the exact amount making it the most efficient....



Makes me want to do one of those "Megasquirt" systems!!



Although I donno if anyone has done a DFI system for a Y.....

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1955 F-600/272/E4OD// Disclaimer: No animals were injured while test driving my F-600 except the ones I ran over intentionally!

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This post was created using OpenSuSE Linux x64 and Firefox

Dan'l and Denn'l (?)

      Good question, I'd think Dennis somewhat right, but I've seen some pretty "Gooey" lookin' intakes. I think in most cases the engine heat cooks the blowby into a black "GOO". The reason it's hard to answer Daniel is that we all assume the Air fuel mixture is a nice even mixture. Not so, fuel drops out on sharp corners from velocity, it runs down the bottom of the manifold in little rivers. Drops out, gets picked up again. Real wet flow testing with cut away or quartz walls shows a real complicated mess. Anything we can do to keep fuel in suspension helps big time.  This is the reason injection picks up MPG and horsepower. Also helps emissions by keeping the mixture close to what's needed. Also injects the fuel close to the intake so it doesn't puddle all over the place.

Frank/Rebop

Bristol, In ( by Elkhart) 

Wouldn't the gasoline dissolve the oil continuously?

  Dennis in Lititz PA

Oops, if fuel is not atomizing properly, then might result in lean-running condition?

6 VOLTS/POS. GRD. NW INDIANA

Frank,



Your comments re: intake manifold laminar flow/rough surface/air bearing, makes me wonder how the oil introduced by a carb-spacer PCV might eventually affect performance (especially in a motor with excessive blow-by)? Could the oil build up and streamline the rough surface (helping velocity?), but also cause overly rich running?

6 VOLTS/POS. GRD. NW INDIANA

alright. thanks for all the tips and suggestions. Now i just have to find a 4bbl intake and a autolite 4100 from a 289 or 302 and buy it.lol. thanks again.

 

              Also, laminar flow is aided by the rougher surface. Makes the air against the walls act as a bearing for the main air column. On the ehaust side of the Head (subject change) we do polish for the opposite reason, less surface to conduct heat back into the cylinder head.

Frank/Rebop

Bristol, In ( by Elkhart) 

That is a very good picture from Charlie and shows a couple points that I mentioned.  One is that area in the cordory bottom of the runner where is starts to bend downward.  This is a real pinch point and can be radiused for smoother flow. Also Charlie polished the bores as they go down from the carb base but didn't radius them into the runner.  This radius would help flow turn the corner from downward to horizontal.

A 1/8" Dremil tool must be awfully slow there is quite a bit of cast iron to chew through.  I like a 1/4" electric die grinder with carbide tools. 

 There is a case to be made against polishing which is that a rougher surface provides more area to evaporate fuel and therefore less liquid fuel gets into the cyl.  I subscribe to this idea and do not polish intake systems.  My guess is that a sandblast rough is about optimal.

Doug T

The Highlands, Louisville, Ky.

64,

      Read what doug said, this is the classically accepted method, and it seems to work pretty well. The Blue Thunder is of course, lighter and flows somewhat better. But the iron intake works pretty good. Maybe better on the street.

Frank/Rebop

Bristol, In ( by Elkhart)