Rkreigh

I like the looks of the magnafuel as a hobbs switch activated secondary pump

my current pump does fine for up to 600 rwhp and I have a meth injection so I can get up to around 700 at the tire without stressing the system too much

going to the 127 fic bosch injectors now so I can step up my game a bit

like some advice on shopping for the braided lines and fittings, fuel pressure regulator, ect... to plumb an upgraded fuel system to go with the big injectors

shooting for around 900 rwhp and like to be able to run E85 too

the high cost of the upgrade is killing me, need to save a few bucks on the fuel system if I can and still flow plenty

if you have another recommendation for this level of rwhp bring it please!!

thanks.

Shoaf85

I am using a magnafuel pump as my secondary pump and so far it is working great. I am running the pump off of a 2psi hobbs switch. The layout is as follows. The factory feed line is still in place all the way to the fuel rail where I have a GM fuel adapter block which has a -8 fitting built into it, this is where I tie the secondary system into the equation. Much like the A&A kit or others similar to it. The magnafuel pump gets its source from a bulkhead fitting in the back of the tank and plumbed as follows -8 to prefilter which is mounted directly to pump then to post filter mounted to the pump via 45* -8 an fitting and then a check valve is mounted after the post filter. Then of course the -8 line is ran to the front of the car where it ties into the fuel rails via the adapter fitting I mentioned earlier. A -6 line runs off of the fuel rails to a boost reference magnafuel regulator and then I ran a -6 line out of the regulator to the original return port on the fuel tank hat. I replaced the factory fuel filter/regulator with a 98' fuel filter which eliminated the factory regulator allowing me to use an aftermarket regulator and also allowed me a port on the fuel tank to plumb the return converting the car to a full return style fuel setup.

JoeyG

I use an ECS fuel ring and run my 4303 in parallel with my Racetronix 255. Boost activated at 2lbs and no issues to speak of. Both pumps merge above drive tank (2* 8an lines) to a Y adapter and -10AN to fuel rails. Racetronix pump uses 97-98 Vette filter and Magnafuel uses pre-filter, both pumps then feed -10an line with 40 micron filter before rails. I run the rails in series then end at an Aeromotive 13101 regulator with -8AN return line to tank FIC 96LB at 3 bar injectors.

Shoaf85

Joey what base fuel pressure are you running? Just curious I am at 60 right now.

I'm thinking of raising mine up to 65-70 ish as I am on E85 and my duty cycle is getting high. I'm using deatschwerks injectors 105lb@60 psi. I'm starting to think the duty cycle calculation isn't very accurate cause I still have complete control over my injectors. I can richen or lean when I'm over 100% duty cycle.

Sorry op for getting off topic lol
You can pm if you'd like Joey.

Smoove

How I ran it on a C6..




and I ran it into a block like this(it's a Y block) with a check valve so it can't back feed...I run a stock Z06 pump with a PTFE line(replaces factory feed) and into this Y..4303 runs off a hobbs switch...




My C5... runs a 4303 by itself currently.



however,...I think I may need either bigger injectors, or a second pump for what I am asking it to do by itself on E85.

JoeyG

I went the other way. I got better throttle and idle response by running 48psi base pressure. My base pulses are right at 2mSec and it purrs like a kitten. Of course im on pump gas, so theres the huge difference. My duty cycle at 14#'s is in the mid 60% range, with a Snow 60ml and 100ml nozzle also.

Rkreigh

thanks for all the pics, the systems look great and it's good to hear the feedback on the magnafuel and activation.

I'm running a haltech s2000 computer and I can trigger the pump on 2 psi boost from there

where's the best place to buy the fittings I really like the material black braid lines (lighter) but i believe I need teflon lines to run the E85 I want to do a nice clean out of whats there now

I believe I have a racetronix and a bap on the primary side but I haven't found where the bap is stashed yet

car also has an alchy control system that will be run off the haltech

Shoaf85

...

Shoaf85

My fittings and lines all came from vibrant performance. Their's E85 compatible

turbotuner20v

A few setups have some pretty elevated pump inlet positions

Shoaf85

Magnafuel told me when I called that mounting the pump on any angle is acceptable...

inspector12

Yeah I'm sure it will work, but not the most optimal. I like the mounting position, I would have just used there MP4701 pump as it puts out more and you can adjust the position of the pump etc...

BLOWNBLUEZ06

True that angle doesn't matter so much, but what I think he might be saying is that you want keep the pump inlet low relative to the fluid in the tank. This helps the system in a couple of ways that I can think of. The pumps aren't good suckers and if the pump is elevated, the fluid can bleed back into the tank and create a situation where the pump cavitates, creating a delay in fuel supply when you need it.

BLOWNBLUEZ06

Custom made fuel sock for the input side of the system, mounted inside the tank.


-12AN input line for volume to create a little mini-sump+ mounted with the head low to help keep the pump from cavitating.
6 micron filter with integrated check valve to protect the injectors and keep fuel from flowing back.

turbotuner20v

Yup, I want to say Magnafuel had a specific recommendation on distance from the tank fitting and the hieght of the pump inlet above the fitting.

This is a C6, but similar.

Stock pump feeds the Y block, magnafuel turns on over 2psi and feeds it also. -08AN from the Y block to the rails. Stock feed line as the return w/ a hose to the tank return fitting. Pump pick up is mounted close enough and low enough to meet what magnafuel recommends.