I'm looking for a drop in fuel system that has more capacity than the Racetronix/Lingenfelter pump but retains the factory jet siphon feature. Does this exist? Is it affordable? I don't need a 1000rwhp system but I would like more than the 600rwhp. I don't want to supplement with an external system. I would like a drop in pump with more capacity. Thanks for your help.

 

check this guy out, have his system for over 5 years with no problem
www.lonniesperformance.com/doublepumpers.htm

 

That setup looks good. It seems comparable to the Aeromotive system. I see that what I would like is a more powerful pump with the Racetronix harness. Has anyone installed the AEM or Aeromotive pumps and retained all factory features?

 

lonnies

 

I think chicago1 used an aem 340 pump and had problems with it... I have a racetronix 255 pump with their harness, 40a kenne bell bap, and meth supporting over 700rwhp so for only 600 I think that setup would do fine... I'm pretty much maxed where I am right now and about to add an aeromotive a1000 as a secondary pump that's only run under boost

 

I was hoping that someone had a good experience with either the AEM or Aeromotive drop in pumps. Have you considered the complete Aeromotive system instead of having all of those parts working together?

 

I don't want that big of a pump running all the time, from what I've gathered it can create more problems that is does good... there is no need for a big pump when driving normally so that's why I'm going to hook up the a1000 as a secondary pump running only under boost

 

I have Chicago1's AEM 320 and have a Caspers harness and am at 52 psi with no problems.

 

I was checking out his build as well. Have you experienced issues? I guess that I'll be around 560-580. The Lonnie's setup is nice but too much $. I'd really like a drop in pump and wiring harness upgrade for around $400-$500. I don't understand why the 97-03 C5 is overlooked for this. The Walbro 465 would be great! Thanks for everyone's help.

 

Nope pump works fine

 

I would ALWAYS recommend fuel system overkill.... it's just one of those things you don't wanna do twice, or 3 times(like myself)...buy a good system, whatever it is. You don't want fueling to be your restriction.

 

The Lonnies is a nice setup and I haven't heard any bad feedback from it in all the years I've been on these kind of forums.

 

What you want doesn't exist, you either have to make your own for cheap or pay the piper. I made a bracket with a 255/400 combo and so far everything works great. Run the constant pump (255 in my case) through the factory line and added a 2nd -6 outlet to the plate for the 400. They Y together at the fuel filter location and the 400 turns on with a 2 psi hobbs. I might try dual 450's next time, but they draw a lot of current for the factory wiring bulkhead if used full time.

 

love to see if 2 450s could be made to fit

I know I'd have to give up the slosh ring around the pumps, but do you think they will fit in the tank?

what can be done to fix the wiring. those pumps look really good and are affordable.

like to hear the best place to buy the fittings and line too. I was quoted 2100 for a fuel system, I think I can do better for less!

 

I thought if you can find the space one could add a 2nd factory wiring plug/terminal. What I and others have done in the past is ground the pump/s to the sending unit plate with a welded stud(bolt) on each side of the plate then to chassis ground outside the tank. That way you can use the factory pump power and ground as two separate power wires (one full time and one hobbs in my case). Since my 400 is only used over 2psi I don't worry about stressing the pins as it only runs from time to time as the factory pins are only rated to I believe 15A (just under what a 255 at 14v pulls at higher pressure).

If adding a 2nd factory wiring fitting would work you could double up the wiring to the pumps and split the current between two pins for each pump. Now this would get the power to them, but the other problem is space since the 400/450 have the larger base. I was able to stagger my 255/400 and make them fit both facing forward, but for two large base pumps one could simply turn one around facing the rear of the tank. It would require a little more in tank hose to be run, but no big deal.

Another thing for the guys that run a large external and want a 400/450/044 etc. in tank would be do what I did for wiring to just the one pump. The two pins on one 450 would be plenty and everything else is done outside the tank.

I used carbon impregnated PTFE from the plumbing monkey, but it's not listed on the site anymore so I called them and they still had stuff. Other AN sites sell similar hose and fittings. E85 and current pump gas is hard on the rubber lines so teflon is the only way to go IMHO for a long lasting solution. I put together my system for uber cheap except for the injectors of course. Just yesterday I filled up the car around 1/8-1/4 tank and it took 13 gallons so it appears the siphon system is working just fine.

 

[QUOTE=slow ride;1587898008]What you want doesn't exist, you either have to make your own for cheap or pay the piper.

This is what I see as well. I'd pay the piper but I don't like the songs I just ordered the LPE 350lph pump and I'm going to see what I can do with it. I will update as I dig in.

 

Does anyone that has experimented with fuel pressures know the approx fuel pressure the siphon system quits working or has poor performance? I know my smallish cam 383 is pulling ~16 in of vac at idle and it spends a lot of time in that area just putzing around. That puts my fuel pressure in the low 50 psi range a lot of the time and everything still seems to work well. I suppose I could test it more, but figured someone probably did that already.