The Silver Buick's well Silver Buick!

[std]

Re: The Silver Buick's well Silver Buick!

I don't know you....I never heard of you....Why are you on my computer....

[Scott Liggett]

Re: The Silver Buick's well Silver Buick!

I don't know you....I never heard of you....Why are you on my computer....

Nice way of not being charged under the Rico Act. Why didn't I think of that? Oh yeah, Randal, I don't know you.

[DanStokes]

Re: The Silver Buick's well Silver Buick!

What's a Randal?

BUT - to work effectively you'll need to glue a piece of twine on one cap or the other. I suppose you might re-fuse.

Dan

[TC]

Re: The Silver Buick's well Silver Buick!

Don't mean to hi-jack, but what's the purpose of the surge tank.

[TheSilverBuick]

Re: The Silver Buick's well Silver Buick!

Don't mean to hi-jack, but what's the purpose of the surge tank.

In an EFI application if the fuel pick up becomes exposed to air the fuel pump sucks the air and there is a drop in fuel pressure. As you know the injectors require a specific pressure to work properly and that drop will cause a mis-fire. OEM efi cars have the surge container built around the fuel pump (that's why the pump/sending units are so big). Lots of people who do efi conversions weld a sump on the bottom of the gas tank and put the pick up in the sump to keep the pick up under gas during cornering. Carb's are more forgiving with their float bowl resevoirs.

When I had the TBI on the T-bird (and it'll be going back on soon!) I did notice when I was down to a 1/4 tank or less that the engine would stumble around corners, as I don't have any kind of sump or surge can to keep the TBI pickup under gas.

[squirrel]

Re: The Silver Buick's well Silver Buick!

The surge tank lets the high pressure fuel pump have a continous supply of fuel. With a carb the float bowl will hold some fuel even if the pump starves because you stop/corner/whatever when the tank is low. EFI will not tolerate air ingestion by the pump...so the surge tank makes sure it never happens. Fuel tanks designed for EFI have built in reservoirs, or it's on the pump on newer models.

[squirrel]

Re: The Silver Buick's well Silver Buick!

hey get back to work Randal

[Mr4Speed]

Re: The Silver Buick's well Silver Buick!

I remember from years ago when Buttera built that sweet 69 Camaro with mechanical injection for the street he had an underhood surge tank on it. It looked like a Corvette radiator overflow tank with a Holley fuel bowl mounted on the side of it. He used the inlet/needle and seat and float to keep the surge tank full.

[jays67]

Re: The Silver Buick's well Silver Buick!

my buddys 69 camaro had mech fuel injected blown big block and that kinda how his was done too, tank with two holley float bowls on it. worked good for him!

[squirrel]

Re: The Silver Buick's well Silver Buick!

A float bowl is not needed for efi.

[jays67]

Re: The Silver Buick's well Silver Buick!

A float bowl is not needed for efi.

see learn something new everyday .

[TheSilverBuick]

Re: The Silver Buick's well Silver Buick!

A float bowl is not needed for efi.

I think Jim using a float bowl method means not having to run a return line back to the tank. The regulator return goes to the surge tank, then the float bowl just adds enough fuel to keep it topped off.

[squirrel]

Re: The Silver Buick's well Silver Buick!

That makes sense. Seems a return line is the simple way to do it..no moving parts

[SuperBuickGuy]

Re: The Silver Buick's well Silver Buick!

why not put a backflow preventing valve on the supply line at the fuel tank? with 3/8" or 1/2" fuel line you'd have quite a bit of reserve without the need for a pipe bomb, ahem, I mean tank.

Dan, you are a punny man.

[TheSilverBuick]

Re: The Silver Buick's well Silver Buick!

why not put a backflow preventing valve on the supply line at the fuel tank? with 3/8" or 1/2" fuel line you'd have quite a bit of reserve without the need for a pipe bomb, ahem, I mean tank.

Dan, you are a punny man.

I don't think it's a back flow issue, it's when the pump sucks an airbubble in. Or do you mean like a float ball that when air hit's it it plugs the inlet? That seems like it'd load up the pump and still drop pressure on the pressure side as it can't pull any fluid from the inlet side.