Nissan 370Z Forum - View Single Post

phunk · 03-19-2012, 04:18 PM

external surge cans do not work out very well in cars like the Z that have return fuel pressure powered venturis. the fuel spent from the OEM regulator pressurizes 2 venturis, one to promote refill of the factory intank pump assembly and one to transfer fuel over the gas tank from side to side. i have helped out a few people with 350z's to get that configuration to work out, it can be a little bit of a hassle. it can be done, but it needs to be configured by someone that understands what is happening in detail with this cars fuel system.

The 370z fuel pump assembly has some benefits to it where i can think of much better ways to plumb an external surge can without any side effects.

it could be done well, and its crossed my mind a few times as its pretty simple. there are 2 things i dont like about it... i dont like depending on 2 pumps when the engines fuel comsumption is within the capacity of a single... and one large concern is, where do you want to put this surge can? i would never build a product that places fuel lines or containers inside the cabin. There is some room to use under the hatch, but where that space is available is different depending on which exhaust system everyone has. this setup also requires lots of extra fuel plumbing around the vehicle... i wanted to keep it all inside the fuel tank or like our current model, 100% stock plumbing. To keep all fuel storage inside the fuel tank is by far the safest solution in terms of collisions/accidents/road debris, etc.

it is my opinion that the best possible way to solve the problem is to just build an all new fuel pump assembly that doesnt have the inherent attribute of poor fluid containment. the next best thing is a band-aid, like an external surge can.

if you can think of a good and safe place to put an external surge can on this car, with adequate displacement, and proper shape (a tall cylinder is most ideal, the smaller the "floor plan" the better it will control fuel placement in turns), i have ways to plumb it to this vehicles fuel system.

03-19-2012, 04:18 PM	#420 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	external surge cans do not work out very well in cars like the Z that have return fuel pressure powered venturis. the fuel spent from the OEM regulator pressurizes 2 venturis, one to promote refill of the factory intank pump assembly and one to transfer fuel over the gas tank from side to side. i have helped out a few people with 350z's to get that configuration to work out, it can be a little bit of a hassle. it can be done, but it needs to be configured by someone that understands what is happening in detail with this cars fuel system. The 370z fuel pump assembly has some benefits to it where i can think of much better ways to plumb an external surge can without any side effects. it could be done well, and its crossed my mind a few times as its pretty simple. there are 2 things i dont like about it... i dont like depending on 2 pumps when the engines fuel comsumption is within the capacity of a single... and one large concern is, where do you want to put this surge can? i would never build a product that places fuel lines or containers inside the cabin. There is some room to use under the hatch, but where that space is available is different depending on which exhaust system everyone has. this setup also requires lots of extra fuel plumbing around the vehicle... i wanted to keep it all inside the fuel tank or like our current model, 100% stock plumbing. To keep all fuel storage inside the fuel tank is by far the safest solution in terms of collisions/accidents/road debris, etc. it is my opinion that the best possible way to solve the problem is to just build an all new fuel pump assembly that doesnt have the inherent attribute of poor fluid containment. the next best thing is a band-aid, like an external surge can. if you can think of a good and safe place to put an external surge can on this car, with adequate displacement, and proper shape (a tall cylinder is most ideal, the smaller the "floor plan" the better it will control fuel placement in turns), i have ways to plumb it to this vehicles fuel system. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph Last edited by phunk; 03-19-2012 at 04:20 PM.