Why the dual Walbro craze?

[Winnipegman]

Why does everyone or almost everyone use dual or tripple walbro pumps. I have had nothing but problems with them. That is why I sumped the tank and went with an external gear driven pump. No more fuel issues after that one. Magnafuel EFI625

[Supralative]

I have ran twin factory pumps in my old Supra and currently running twin walbros in a customer Supra with no issues.

Our Eclipse runs twin walbros with no issues either so far.

[KenHenderson]

Originally Posted by Winnipegman

Why does everyone or almost everyone use dual or tripple walbro pumps. I have had nothing but problems with them.

Because they are fixing something that's not broken. The Walbros are physically smaller than the OEM Densos and draw less current which some consider an advantage. I don't. When it comes to the actual task of pumping fuel, the Densos demonstrably outperform the Walbros and are significantly more reliable. I've seen too many of my personal friends have Walbro-based problems with their fuel system and I do not believe the Walbros are worth the risk. When it comes to 1000 + whp cars, twin HKS/Densos (like I have), triple Walbros or a big Weldon are pretty much required. If a guy's power goals do not exceed the capacity of dual OEM Denso pumps, I can't, for the life of me, figure out why he would go with Walbros or any other non-OEM fuel pump.

Ken.

[slither]

What kinda issues are some people having with walbro's?

[Wreckless]

Originally Posted by slither

What kinda issues are some people having with walbro's?

They just up an fail randomly. They start functioning intermittently when stressed. Some just never work right.
I think that when you get a 'good' Walbro, its a good pump. The flipside is that the quality control seems to suck and I'm not the kinda guy who wants to weed out the bad pumps from the good pumps when the fate of my engine hangs in the balance.

If I can spend $350 a tire on good tires, thousands on a turbo kit, hundreds on a steering wheel or seat, etc... I can afford to spend a couple hundred bucks on a truly trustworthy fuel pump and never have the worry of a pump dropping on me at 1.7 bar.

[HotSoup]

AEM must make Walbro pumps.....or vise versa LOL...

Jason

[KenHenderson]

Originally Posted by Wreckless

They just up an fail randomly. They start functioning intermittently when stressed. Some just never work right.
I think that when you get a 'good' Walbro, its a good pump. The flipside is that the quality control seems to suck and I'm not the kinda guy who wants to weed out the bad pumps from the good pumps when the fate of my engine hangs in the balance.

This is true. Only one of my buddies has been truly unfortunate....popped a motor while racing another buddy's ZX-12R (pre-turbo). No warning whatsoever. The pump had been functioning as envisioned until it went....in a big way. Two others noticed the intermittent operation operation of at least one of two pumps before it became truly costly. Far too many, IMO, are bad right out of the box but, as Wreckless said, if you get a good one, you should be alright, assuming you want to run that risk in the first place.

Ken.

[Smokey1226]

Originally Posted by HotSoup

AEM must make Walbro pumps.....or vise versa LOL...

Jason

LOLOLOL i couldnt of said it any better myself

[scottinhawaii]

Originally Posted by Wreckless

They just up an fail randomly. They start functioning intermittently when stressed. Some just never work right.
I think that when you get a 'good' Walbro, its a good pump. The flipside is that the quality control seems to suck and I'm not the kinda guy who wants to weed out the bad pumps from the good pumps when the fate of my engine hangs in the balance.

If I can spend $350 a tire on good tires, thousands on a turbo kit, hundreds on a steering wheel or seat, etc... I can afford to spend a couple hundred bucks on a truly trustworthy fuel pump and never have the worry of a pump dropping on me at 1.7 bar.

I couldn't have said it better myself. I can't believe anyone still buys Walbros for our cars. Leave them for the Eclipse guys.

[Prodigy]

make it sticky?? i have countless friends and my self that have run into fuel problems and turn out to be the pumps. even you know the dual denso takes more power i just add a 160amp alt. volts never drop lower then 14v...

[damianhindley]

walbro in my supra, 3 years no probs. Walbro in my civic, I went through 2 in a year. I plan on going stock but the walbro came in the supra.

[TooJayZee]

Originally Posted by HotSoup

AEM must make Walbro pumps.....or vise versa LOL...

Jason

Originally Posted by Smokey1226

LOLOLOL i couldnt of said it any better myself

Who are you guys to laugh. Aems work 100% perfect......80% of the time

[Winnipegman]

The thing is I spent say 20 grand on an engine, why cheap out on the pumps? Who first decided to use dual walbros to begin with? Why not just get one big pump. I suppose it's because they are intank pumps and it saves a little hassel then having to run an external. But if you build your engine up to need that much fuel then you can spend the hundred bucks to sump the tank and run an external. I dunno any more thoughts on this?

[LexISpooled]

Originally Posted by Winnipegman

The thing is I spent say 20 grand on an engine, why cheap out on the pumps? Who first decided to use dual walbros to begin with? Why not just get one big pump. I suppose it's because they are intank pumps and it saves a little hassel then having to run an external. But if you build your engine up to need that much fuel then you can spend the hundred bucks to sump the tank and run an external. I dunno any more thoughts on this?

If you spent $20k just on your engine then your first problem is finding out who ripped you off..

Why do so many run dual walbros its very simple, for the most part they work perfectly fine (personally I do not know of a failure other then the internet stories), cost less than half of the OEM denso's and need half of the power denso's require..not rocket science that most will go that route..

Why dont people run one huge pump, simple thay sound horrible and loud..for me no thanks..

With that said I have one inline and one intank walbro, at one time I had the denso pumps but decided with the amount of people running twin walbros w/o issues I decided stick with them..

I know ray at pfs here in md got a single walbro to fuel 600rwhp, and honestly I run that power level or less 95% of the time for pump gas so even if I had one fail I'm still ok..

If I did it all over again I would probably have gone with the denso's just because I want the best of the best and OEM toyota parts for the most are just that..

[Winnipegman]

I did hit 676hp on a single walbro but the fuel pressure actually started dropping at 520hp. But if you're running over 700 hp and need more than one pump or a bigger pump then what's a little extra noise?

[2JayZCres]

What are some alternative fuel pump options, i am looking to make about 700WHP and was going to go with dual walbros but the more i read about failures the more i gets antsy about trusting my engine to them.

suggestions?

[Morefaster]

Originally Posted by 2JayZCres

What are some alternative fuel pump options, i am looking to make about 700WHP and was going to go with dual walbros but the more i read about failures the more i gets antsy about trusting my engine to them.

suggestions?

dual oem denso's

[Griffon]

Reading this has me a bit worried as my car is in the shop being worked on right now... Fuel system wise I have HKS fuel rail 780cc injectors, Greddy E-managment and a 255 LPH pump running a T60 single at no more then 18psi at the most... Is this safe, or should I be looking at different pumps?? (Its a 95 NA-T)

[StokerSix]

Running a 67 turbo using 2 walbros on stock wiring for 6 years +...zero problems. Well, I did use 12awg for the bracket wiring.

Running off the stock fuel ECU instead of ghetto rigging it to the battery is what sold me on the walbros. Many advantages to running off the stock fuel ECU.

[SupraHULK]

Last time i got on the dyno,Sept,14th 2007, i was running twin Denso pumps,one was brand new,the other was the orginal pump the car came with. well the orginal took a shit on me on the dyno.
and the shop i was at had Walbros in stock,so i bought 2 brand new walbros installed them,everything went fine.
But the other day im driving,and i get on my car get into boost,and start leaning out,im like WTF
check my fuel pressure on my adj.FPR gauge, only at 20psi
turns out one of my Brand New Walbros already took a shit,with less than 500 miles on it.
So now im pulling my motor,and building it. looking to hit 1000whp, but not sure of which fuel system set up to go with???
any ideas? no more Walbros!

[Cordeez]

I had a 255 in my 240sx, ran perfectly for 1+ year and 4K miles.
Put one in my supra, and it started sputtering after about 250 miles, then it finally went out at 255 miles.
Replaced it with another walbro and has been going good for about 1 year and 5K miles. Looks like its hit or miss.

[KenHenderson]

Originally Posted by virgogasm

Last time i got on the dyno,Sept,14th 2007, i was running twin Denso pumps,one was brand new,the other was the orginal pump the car came with. well the orginal took a shit on me on the dyno.
and the shop i was at had Walbros in stock,so i bought 2 brand new walbros installed them,everything went fine.
But the other day im driving,and i get on my car get into boost,and start leaning out,im like WTF
check my fuel pressure on my adj.FPR gauge, only at 20psi
turns out one of my Brand New Walbros already took a shit,with less than 500 miles on it.
So now im pulling my motor,and building it. looking to hit 1000whp, but not sure of which fuel system set up to go with???
any ideas? no more Walbros!

Your Denso pump failing is an extreme rarity in my experience but, obviously, it can happen. Twin Densos can get you 1000 whp, but it will be close. Twin HKS Densos (much more expensive) can do it all night long (1110 whp on my black car). Triple Walbros are necessary at this power level because they do not flow as much as the Densos and as Mark Conte said, they do not necessarily handle stress that well. Look at all the hit and miss Walbro stories in this thread alone. Talk to anyone associated with a top-notch Supra race team, as Conte was, and you'll hear a lot more. Guys should go into this deal with their eyes wide open. It is a SF myth that Walbros are superior to OEM or HKS Densos. (My assumption is that most of you are building high-powered street cars as opposed to purpose-built race cars).

Ken.

[Tony the Tiger]

I just spend the money on a nice fuel pressure gauge with warning light. When pumps go, at least the direct result is fuel pressure drop. It's easy to pay attention to a nice red light on your dash notifying any fuel pressure drop (just like oil pressure drop w/ oil pressure light!).

On the other hand, injectors for example are far more important. When injectors fail, it barely registers on the wideband (esp when using one wideband for all 6 cyl's), and it easily pops one cylinder. Enough to kill the motor.

When running dual walbros, just install a trusty fuel pressure gauge if you are afraid of bad pumps. If pressure is dropping, it means that the fuel pump isn't keeping up for whatever reason. Bad wiring, loose electrical connections, fuel pump physically failing, etc.. You can install two Denso pumps but can still run into a risk from bad wiring for example. I'd personally go with dual Denso pumps if I were to max out dual Walbros. Even up to today, I don't trust my Walbros if I were to use them up to 80% of its capacity.

[StokerSix]

Originally Posted by Tony the Tiger

I just spend the money on a nice fuel pressure gauge with warning light. When pumps go, at least the direct result is fuel pressure drop. It's easy to pay attention to a nice red light on your dash notifying any fuel pressure drop (just like oil pressure drop w/ oil pressure light!).

Ding ding!

Exactly. All modifed cars with a fuel system should have a fuel pressure gauge.

My FP red light will catch my attention immediately as it's right in front of my face on the A-pillar.

[Speed King]

Originally Posted by KenHenderson

Your Denso pump failing is an extreme rarity in my experience but, obviously, it can happen. Twin Densos can get you 1000 whp, but it will be close. Twin HKS Densos (much more expensive) can do it all night long (1110 whp on my black car). Triple Walbros are necessary at this power level because they do not flow as much as the Densos and as Mark Conte said, they do not necessarily handle stress that well. Look at all the hit and miss Walbro stories in this thread alone. Talk to anyone associated with a top-notch Supra race team, as Conte was, and you'll hear a lot more. Guys should go into this deal with their eyes wide open. It is a SF myth that Walbros are superior to OEM or HKS Densos. (My assumption is that most of you are building high-powered street cars as opposed to purpose-built race cars).

Ken.

Triple Walbros are required on 1000rwhp?