Anthrax Mike

I'm planning on buying an aeromotive external fuel pump, to place in-line. So my question be this, is the orginal intake pump retained to act as a sort of primer? Or do you just have a pick-up of sorts inside the tank with a sock filter on it? I'd been planning on purchasing this for a bit but have not given it any thought until now, just before I order it.

Something else the carb'ed fuel pump is in tank no?

I bring this up because I've heard people drop the term surge-tank around and it had me wondering if this was more complex than I'd first considered.

Danke.

Latin270

Nope. Fuel pump isnt in tank.

Anthrax Mike

That is best.

Oh, and thanks.

I've just been searching around and it seems like people have been griping about the aeromotive FP saying that their fuel pressure dips every now and then on a blow through set-up. The only thing is that the neglect to state at what amount of boost they're running. The pump is rated at 16psi, that should be enough for 10psi of boost, no?

trochoid

iTrader: (6)

Most guys that are boosting are using FI pumps and the Mallory 4309 fpr or an Aeromotive fpr.

If you have an SE tank, a surge tank is not needed. Some setups run a a high flow carb pre-pump in the stock location, then an FI pump right after the surge tank when equipped with the 12A tank.

Personally, when ever I get ahead in the funds dept. and some other projects done, I plan on taking my SE tank, removing the stock pickup and installing the bung and TII fuel pump in the tank. Tanks are the same depth and it should not be a difficult mod. This makes a bullet proof and proven fuel supply system, especially doing a TII install.

steve84GS TII

For EFI,you cant beat the intank pump mod.Theres a reason why almost every injected car around uses that system.Its safe,silent and reliable.
The SE tank swap is a cheaper,easier way to go.....if you can find a good SE tank that is.Itll allow the use of any external EFI pump,with little to no mods needed.The down side is pump noise and an exposed pump.

For a carb,you dont need to worry as much about fuel tank slosh since the pump pressure doesnt directly influence fuel delivery into the intake like EFI.You can bolt on just about any fuel pump you want with the stock tank and lines,then use a regulator to control the pressure at the carb.Just be sure if you do run a 45-50psi EFI pump,that its not going to be burnt up having its output pressure strangled down to 10-15psi all the time....

Surge tanks/swirl pots are a way to run high pressure EFI without modding the tank.A low pressure carb pump takes fuel from the tank and feeds it to a high pressure EFI pump thats inside its own little tank.The EFI pump then sends high pressure fuel to the injectors.Its a proven system and it does work well.....but I never understood why anyone would go for such a complicated and cumbersome setup when its easy enough to just switch to an intank EFI pump and call it done......

REVHED

I've never seen a surge tank where the EFI pump sits inside. Usually the pump is external.

IMHO, it's easier to setup a surge tank then it is to have to pull the fuel tank and modify/weld it for an internal pump.

Latin270

Steve I dont think that a little noise is ever an issue when it comes to performance. As far as reliabilty goes a fuel pump will last just as long in or out of the tank. You are correct with safety though. I believe all cars (if not already) will have to comply with a new federal safety standard...one being an internal fuel pump.