190 or 255 lph?

[mutant]

Could be. I'll measure the switch when I get home tonight. Would be simple to check, just unplug the switch and see if the car starts. If it starts then there is a resistance wire. If not then the resistor must be in the switch bundle.
-Dana

[Pat_in_L.A.]

On the 85.5-86 the car will start and run with the vacuum switch disconnected without jumping the switch. I believe it will default to the higher pressure setting. I think you'll find that the resistor goes to chassis ground under manifold vacuum conditions in order to lower the pump volume and noise during idle.

[svodad]

fuel switch amp rating

Well, in the ongoing dialog about pump size, the whole switch thing and wire capacity is a new one to me. Looking up the amp data on the Wabro 190-255 the range of power (12 volt to 13.5 volt) is 12.5 amp on the low end and 17 amp on the hightest point. I should point out that amp draw at expected pressure and flow would be about 8 amp for the 190 series pump and about 10 amp for the 255 series pump.

This puts the highest load at 13.5 x 17 or 229 watts.

Question is what is the stock pump draw and will this switch or any other part of the circuit have a problem with up to 17 amp draw and 10 amps normally? I understand the ground strap must be changed to larger gage to make sure the pump does not "brown out".

SVOdad

[Todd]

Originally posted by jayG
My stock one was bad and caused the fp to jump to 90psi under boost! And thats with a stock fuel pump! Caused all kinda havoc on the dyno...can I get an amen Todd?

AMEN... All kinds of things can cause havoc while on the dyno

[SvoTy]

In MMFF a couple of months ago they did a test on quite a few pumps from stock to T-Rex (a joke) at the pressures that we run.

If I remember right the 190 made a big nose dive around 60 pounds or so. Maybe someone can dig the artical up.

Ty

[svodad]

Final decision, HP 255lph

Just changed my order at Motion Dynamics from the 190lph pump to the HP255 lph pump based on everyones input (Walbro part # GSS340). Fortunately the other pump did not ship out yet. I might have settled for the HP 190lph pump, but it was only going to be the standard pressure one.

I also am getting a gage and the Kirban fuel pressure regulator that they sell. Anyone see any reason not to go that way vs using Acufab brand?

Want to do this job only once.

[luvtolean]

Re: Final decision, HP 255lph

Originally posted by svodad
Just changed my order at Motion Dynamics from the 190lph pump to the HP255 lph pump based on everyones input (Walbro part # GSS340). Fortunately the other pump did not ship out yet. I might have settled for the HP 190lph pump, but it was only going to be the standard pressure one.

I also am getting a gage and the Kirban fuel pressure regulator that they sell. Anyone see any reason not to go that way vs using Acufab brand?

Want to do this job only once.

I hope you're not in a hurry.

If you order the regulator from them, you will likely be charged shipping twice since they'll probably be drop shipping the pump from elsewhere. I ordered pump, regulator and gauge from them. I was charged more than $40 in shipping for a couple of pounds in parts, and it took over 6 weeks to finally get it all.

This adds a bunch of cost and frustration to what is already far from the cheapest price on the web. I wouldn't mind the cost if the service was even good. But in over 15 years of mail/web ordering, this was by far my worst experience.


My Kirban works fine, so does the paxton on my 5.0. (fyi, the 5.0 and the SVO use the same part) The only downfall I see to the Kirban is that it doesn't have a port for a fp gauge like the paxton. Dunno anything about the accufab FPR specifically, but they make nice stuff.

[Gyrhead]

Part numbers

After a lengthy search, I'm ressurecting this thread to get some information on the Walbro part numbers. Walbro has changed part numbers as often as some folks change their bloomers and a lot of online vendors disguise the Walbro part numbers keep you from comparison price shopping. We just picked up the Walbro line and Walbro has zero customer support for it's distributors. Now, I mean zero! They don't even have a catalog for crying-out-loud. Does anyone have the updated Walbro part numbers for the 190 and 255 high pressure pumps?

What I have so far:

190 LPH standard pressure pump was CGA-700-3, now???

255 LPH high pressure pump was CGA-759, then GSS340, now F20000169

Does Walbro even have a high pressure 190 LPH pump?

Any help would be appreciated.

[bendutro]

There is a switch on the '86, I think Eric is referring to the resistor on the pump ground wire in the early cars.

The switch occurs under vacuum, not pressure, you can hear it at idle just blipping the throttle, so there's no worries about it not switching fast enough to keep up with the turbo. The switch is also adjustable so if you feel like playing with the activation pressures, it's available.

I installed a 255HP two weeks ago and had a noticable improvement over the very tired 20 YO stock pump. Electrical load is definately something to keep in mind, especially since Ford's electricals are bare minimum as is, but with a 3G upgrade, stock wiring, I'm doing fine running 17 psi. I probed the entire fuel systems eletrical connections for voltage and resistance and was happy with the results.
IMHO, there's no reason not to get the 255. You can never have too much fuel supply at the rail.

[Gyrhead]

2 years ago, we did a 190 LPH swap on my original 86' car at the 04' Reunion. I bought the pump from APE and at the time thought it was a 190 LPH High Pressure pump. I've been having some problems with fuel pressure with that car lately as the fuel pressure won't go over 45 psi when boosting and have a feeling the wrong pump may have ended up in that car. I went to APE's sitre and I see they don't offer a 190 HP pump. Is it my imagination that they ever did? Are people running the regular 190 pump in their cars without problems? Yes Mike, I did reclamp the hoses this past weekend.

Paul

[XXXXXXXX]

I have an 84SVO. I will be going with the 255 pump in a few months. Do need to do something with that wire to get full power going to the pump? X

[Pat_in_L.A.]

2 years ago, we did a 190 LPH swap on my original 86' car at the 04' Reunion. I bought the pump from APE and at the time thought it was a 190 LPH High Pressure pump. I've been having some problems with fuel pressure with that car lately as the fuel pressure won't go over 45 psi when boosting and have a feeling the wrong pump may have ended up in that car. I went to APE's sitre and I see they don't offer a 190 HP pump. Is it my imagination that they ever did? Are people running the regular 190 pump in their cars without problems? Yes Mike, I did reclamp the hoses this past weekend.

Paul

I doubt that it's the pump. We made certain before the swap that you got the high pressure pump. One test to prove or disprove the pump's capacity is to deadhead (plug off) the return line while turning on the ignition switch to see the max pressure that it can attain. Those 350PSI hoses that I brought are pretty stout, aren't they? They held all that pressure without any hose clamp! Oh that was a fun weekend. Victor was afraid to get near me for fear of spontaneous combustion.

[Gyrhead]

Did the cup have a ciggarette in it?

[mutant]

I vaguely remember you coming into the hospitality room, where the gearbox was soon to be overhauled, with a styrofoam cup of that old petrol "to share the aroma" and then discovering that the cup was suddenly melting away form the petrol solvents and rushing towards the door - and dripping the "aroma" along the excape path...

Did the remains of the cup get put into your rental car gas tank too?

[fengler]

That may have been due to the fact that the stock pump may have been on its way out. They have a tendency to get "loud" when they get old and they start to "strain" ( if you will. )

But I will say that the 190 Motorsport pump that I had ( which is basically the Walbro pump with some sort of deadening material around it and a new cage. Its a complete "drop in.") was just as loud as my 255 Walbro.

I have done 292 to the wheels on the 190 and the lean condition was more than likely related to another component of the car.

Im just sayin for the couple extra bucks, ( for me )to have the ability to say "If I want more HP, at least I know I have the fuel for it. "

do you know if that motorsport 190lph is a "high pressure" pump?