always wondered myself if the in line with the stock in tank was enough for big cube, fi, n20 etc. or if you had to go with a better intake alone

 

what about the bosch intank replacements?

 

I use a Bosch 0580254984 pump (205lph at 43.5psi) converted to intank configuration, and a second same pump running outboard off a sump at the back/bottom of the stock tank. The outboard pump came as an inline booster with my NOS dry kit in 1995, and its still going strong after 11 years.

The shop that built my engine uses that pump almost exclusively.... each one is good for at least 500(flywheel)HP. Accel resells the same pump, relabeled as "Accel" and claims its good for 750HP, but it can't support that at 43.5psi.

I run NA off the intank pump, and the outboard pump comes on when I arm the 300-shot of dry nitrous. Running 78# injectors at 58psi.

The "984" is the only pump I'd use. The shop had one setup with a bank of 4 of them supplying a Porsche twin turbo setup running almost 30# of boost.

 

oh so it isn't an off the shelf replacement, but a conversion of types.

 

Correct, and I didn't do the plumbing, so I don't know the exact details. I know from the receipt that it took a Bosch 12C pump inlet seal ($0.50) and a Bosch 12C-AN6 adapter ($14.65). My entire fuel system is braided S/S, so its not going to be the same as trying to do it with the stock lines and fuel pump connections.