stock s197 4.6 fuel pump + 39# injectors

[ZR]

Before the Shelby upgrade was available, some were adding a second pump to the stock hat. Problem is, wire and FPDM is sufficient for one pump, never intended or up to the task of two. Funny part about it, most get away with it for a very long time while others don't.

[Uncle Buck]

Nice to see a kit that address's the small factory wiring. No upside to installing a pump that requires more amps to properly run vs what the wiring can supply. How did that compare in cost to the FMS dual pump kit?

The wiring upgrade was only $40 and I lucked out and found a used Wabro upgraded hat for $150. I think S&H will do them for around $265. All USD of course.

No experience with it yet. We'll see how it does when Matt has it on the dyno. If I'm short on fuel at all I'll bite the bullet get a GT500 set up.

[Uncle Buck]

What do they suggest Nick?

I think this is the thread Nick was referencing. Looks like solid 3v fuel info here

http://www.s197forum.com/forum/showt...ghlight=Walbro

In a nutshell GT pump is done at 375-400

BAP is a temp solution at best

Supply wire upgrades are highly recommended

GT500 setups are a great choice to 650

Plenty of good upgrade options using a GT hat if using AEM, DW or Walbro pumps

I noticed not much love for OP's injector choice on a 3v.

[ZR]

Keep getting a data base error message over there.
Anywho, set up you've gone with should be well up to the task and serve you well.
By 39lb, take that to mean stock Cobra injector, not sure about the lack of love for them, been solid n reliable performers into the 460rwhp (and for some even into the 500 range).

[Uncle Buck]

Looks like the site's down

[ZR]

Cool, thanks UB.

[Speedtospare]

A Single automotive 340 lph topped out at 580 whp on a stock fuel lined 4V on the dyno last summer. I personally run one pump with 39 lb injectors and I make 460 whp and I have had 2 years of no issues other than a pump failure. On that note, the chev boys state one single Walboro 400 lph will support 600 HP. I would agree with this.

No offense to anyone here but I find for guys go so overkill on fuel systems its crazy. LS Mullet men cobble junk together and go 8's while Ford guys put fuel systems on there car that cost $1500 and can support 1000HP but only go 12's. Dual pump are great some say if one pump dies you have a second. I would rather have the car die on one pump than get 1/2 the amount of required fuel with 2 pumps under full boost while holding it to the floor. SO many varying opinions.

[js197]

from what everyone posted it just sounds like they would rather have a healthy margin of error rather than a blown motor. Never seen a $1500 fuel system on a 12 second car? maybe they have big plans for down the road?

Im from the world of being a cheapskate and enjoying $250 replacement engines as well (ford escort tuning broomstick shifters, engine mounts made from fence poles, arc welded everything etc. ). similar I would imagine to some of the cheaper "LS mullet men".

the "old me" would have a fit hearing about expensive fuel pumps.

BUT if you drive a car that isnt running $250 junkyard engines and need the car to get to work everyday and if you can afford a overkill fuel system there is nothing really wrong with overkill.

cheapest 4.6 3v ive seen in ontario on car-part.com is $2500 + shipping from Ameliasburgh. so the argument of spending a couple hundred on a pump seems pretty valid the more that I think about it.

[Monera3v]

from what everyone posted it just sounds like they would rather have a healthy margin of error rather than a blown motor. Never seen a $1500 fuel system on a 12 second car? maybe they have big plans for down the road?

Im from the world of being a cheapskate and enjoying $250 replacement engines as well (ford escort tuning broomstick shifters, engine mounts made from fence poles, arc welded piping etc. ). similar I would imagine to LS mullet men.

the "old me" would have a fit hearing about expensive fuel pumps.

BUT if you drive a car that isnt running $250 junkyard engines and need the car to get to work everyday and if you can afford a overkill fuel system there is nothing really wrong with overkill.

cheapest 4.6 3v ive seen in ontario on car-part.com is $2500 + shipping from Ameliasburgh. so the argument of spending a couple hundred on a pump seems pretty valid the more that I think about it.

Yea pretty much

I just got my 3v replaced with a hyper low mile engine... the price is not pretty for 3v replacement.