Why dont pople run 2 FD pumps? Does anyone know the flow rate of the stock FD fuel pump? Seems like it would be a cheaper fuel set up that "Should" support 600+ whp

any thoughts

 

Because half the time the FD one has high mileage and it is less expencive and a better piece of mind to get to walbaros.

 

I am going to be running dual FD pumps with my new GT3574 setup. It should be more than enough for my goals (no more than 450whp).

And yes, it is very inexpensive compared to some other options.

Denso pumps are more reliable than walbros, IMO. Even with higher miles.

 

the only problem is when one pump fail unde high load... not so good right?
I hade 2 walbros hooked but never liked the feeling if one would fail. Right now I am installing the Weldon 2035 kit on my car.
Just lite silvr94r2 did a few years ago... you can find his tread just search for weldon 2035.

This is an expensive alternative, but so is a rebuild...

 

the only problem with a dual fuel pump set up is if you have one pump for each ral will be catastrofic if one fail cause it will have 0 fuel press in 1 rail, but if you Y them up it will be the same if 1 fails that why you should get a fuel press gauge or a wideband or just not wot at full if the car is exploding for the exhaust, if you do a good job it will be fine. but that its just my opinion.

 

I know the issues with a dual pump setup but many people run twin walbros, supra, and other aftermarket pumps my question is WHY NOT RUN 2 FD PUMPS

 

why run two FD pumps when you can run two Supra pumps? they are both Denso pumps, but the Supra flows more. Even a Supra pump with a Kenne Belle boost-a-pump can flow 600whp on a piston engine.

 

Because you can buy an fd pump for $25-$40 add it to your stock pump and have enough for 600whp
or
go your route spend $200 on a supra pump and another $200 on the boost a pump and still only flow enough for 600 (I have yet to see anyone do this anyways)

I understand why you would choose other pumps when going over 600 but to me it seems that most members on this board are not even making 500 so why spend all this money on fuel pumps and add ons when 2 fd pumps can be combined and flow plenty of fuel for alot less $$$

Not trying to be a D**K just looking for a better solution or some constructive criticism on why it wont work

 

I cant see any reason why it *wouldnt* work. I honestly cant even see any downside to it, other than the fact that you have a chance of them failing, but i dont see that as being higher than the risk of any fuel pump failing. Interesting idea, very cheap alternative for alot of fuel.

 

You wont find any criticism on why it wont work, it would work fine.

If you can make your power with a single bosch or walbro or supra that is what you need to do. Running 2 old stock pumps to make your power is risky if you could have made it with just one aftermarket pump.

 

If you are running a fpr were you tee the two fuel rails ,1 pump will pressure both rails equally if one pump fails you will just loose the volume that both pumps provided but not the pressure. And a hobs pressure saftey switch wired to the computer can cut power if you want a safe pressure method.

 

I fail to see why people think stock FD pumps are 'risky'. I hear of walbros and aeromotive pumps failing all the time. I can't even remember the last time I heard someone post that their stock pump died.

 

the risk isnt in the fact that its a stock FD pump, the risk is in the theory of running 2 pumps if you could simply run one inexpensive one to do the job. Dual pumps should be reserved for cars that actually need to have dual pumps because they have extreme power, not because the owners are willing to take risks for the sake of the least expensive route (read, respectively; being cheap)

 

Ive already maxed the supra pump hence the reason for this post I dont want to spend another 150 for another supra pump or boost a pump if i can buy an FD pump for 40 bucks and put my stock pump back in and make more power (and money if i sell the supra pump)

 

ah, understood. yes if you already maxed a supra pump then adding another pump is the next step.

 

well yeah, once you are over 400whp you are close to maxing out any affordable single in tank pump. I needed to do something more than my RP denso pump. I also didn't want to deal with an external pump.

IMO, dual FD pumps (or any other similar denso pump) should be one of the most reliable setups when wired correctly (possibly including upgraded wires and relay). These pumps are rock solid.

This is not 'being cheap'.

 

Check out cj-motorsports they have a FD dual walboro carrier that drops right into the tank, easy install. Here is a picture but this one is pictured with dual bosch 044 pumps, more than enough fuel.



There color has changed since then and the anodizing comes up MUCH better.

Just run dual feed -6 to a single -8, if one pump fails you still have fuel and you wont run completely dry.

 

if you are making that kind of power, why be cheap on fuel pumps? Supra TT and Cosmo pumps are Denso, and they're better. If you've already dropped $10-15k overall and probably around $1000 or more for the rest of your complete fuel system, it just seems stupid to use a pump that flows less and even though it's the same quality (but probably older).

I could've run two T2 pumps for like $25 instead of 1 Supra TT for $100. Guess what I picked.

 

Because 2 supra pumps are overkill for my goal and 1 is not enough! Im not saying one will last longer then the other, I just want to know why people dont use the FD pumps when they will flow more then enough for most peoples hp goals on this board, it seems like frivoulis spending to buy 2 supra pumps for $300when 2 FD pumps willl work just as well

 

I have walbros and love em..never a issue.

 

I'm doing that as my pump set up. They going to be taking that picture down sometime. Someone discovered that the two shafts for the pump bracket is 1.5 inches too long. I think this product will work very well =)

 

there is more wrong with that assembly than the length at the moment.

We are taking the bosch option out of the equation for now as we have to do a partial redesign to shift things around. the pumps are so big its just a clearance nightmare.

we believe that we can resolve the clearance issues on the bosch kit by redesigning the plastic pump locator brackets and shortening the rods 1.5 - 2.0"

those who have ordered this assembly will be individually notified of the expected 10 day delay in shipping, and recall for adjustment on the very very few that has already shipped

 

Don't even think Charles knows it yet but the install problem has been rectified. He came up with an idea today and we tried it on a car we have in the shop and it worked. The idea is pretty simple to implement and will be easy for CJ Motorsports to produce a parts to retro-fit all the kits currently on the market. In the end the install is TIGHT!!!! But everything does fit.

 

It's actually a good idea. Actually considering doing it myself now.

the only drawbacks i can see is the increased complexity of wiring two pumps in plus mounting them.. the above product looks like it might cost a bit, but im sure there is a way to do it with the stock carrier.

Probably T-ing them in rather then running to separate rails would be simpler.

The only other thing is in the unlikely event that one pump does fail how would you even know until you actually just run out of fuel and possibly detonate? Course that could be said with any dual pump setup. If you have one pump and it fails the car usually dies or wont start... know what i mean?