walbro 450lph

[BigM460]

Anyone installed or know anyone who has?
I'm wondering about installing one on my car. Just about maxed with the 340 pump.
Don't really want to go with dual pump if possible.
Thoughts?

[MOTOWN]

Im running two Walbro 400lph pumps , the difference besides more volume is that the 450 is E85 compatible , and these pumps will not work in a returnless fuel setup.

[BigM460]

Im running two Walbro 400lph pumps , the difference besides more volume is that the 450 is E85 compatible , and these pumps will not work in a returnless fuel setup.

Why is that? I heard that the 340lph couldn't either, but have had it for a while now.

[MOTOWN]

Why is that? I heard that the 340lph couldn't either, but have had it for a while now.

The 400 series pumps push way too much fuel for a returnless setup (one is good for 600rwhp) , you would never be able to regulate the pressure on a returnless setup , and it will blow the diaphragm out of the oem regulator , and run extremely rich.

Not to mention the stock wiring would never support the amperage demands of a 400 series pump!

[massacre]

Return style isn't hard to do, some parts of it can be kind of expensive.

[BigM460]

Guess I'm just having trouble understanding why you can run 2 pumps returnless, but not one large pump? 2 pumps would move more fuel.

[Vortech347]

Guess I'm just having trouble understanding why you can run 2 pumps returnless, but not one large pump? 2 pumps would move more fuel.

Return style systems have a regulator that flows un-needed fuel back to the tank (Just maintain's a set pressure). Returnless systems have a fuel pump driver module that delivers fast pulses of power to the pumps. It has an electric sensor to determine fuel pressure. Problem with big pumps is that they aren't designed for this type of operation, and their pressure spikes so fast they are hard to control.

In a friend's car he has 2 400's in a Fore Hat (Mustang) and the first pump is on all the time and the second comes on with a boost activated hobs switch. That way both pumps aren't on all the time. It made the regulator sound like a washing machine. :banana2:

[BigM460]

Return style systems have a regulator that flows un-needed fuel back to the tank (Just maintain's a set pressure). Returnless systems have a fuel pump driver module that delivers fast pulses of power to the pumps. It has an electric sensor to determine fuel pressure. Problem with big pumps is that they aren't designed for this type of operation, and their pressure spikes so fast they are hard to control.

In a friend's car he has 2 400's in a Fore Hat (Mustang) and the first pump is on all the time and the second comes on with a boost activated hobs switch. That way both pumps aren't on all the time. It made the regulator sound like a washing machine. :banana2:

I understand that. F.A.S.T. even uses the 450lph pump for their returnless system, and this pump was designed by TI automotive for returnless use. So..........
Really thinking i will give it a shot if I need more fuel after the headers are installed. If folks can run 2 each aem 320's, seems 1 450lph should be do able.

[Zack]

I understand that. F.A.S.T. even uses the 450lph pump for their returnless system, and this pump was designed by TI automotive for returnless use. So..........
Really thinking i will give it a shot if I need more fuel after the headers are installed. If folks can run 2 each aem 320's, seems 1 450lph should be do able.

Its not doable man.
Ask Mike M, who has done it! He had to remove it immediately because the fuel pressure was above 60psi at idle.
Listen to us before you waste time and money.

[MOTOWN]

I understand that. F.A.S.T. even uses the 450lph pump for their returnless system, and this pump was designed by TI automotive for returnless use. So..........
Really thinking i will give it a shot if I need more fuel after the headers are installed. If folks can run 2 each aem 320's, seems 1 450lph should be do able.

Chris just go return style! you already have a -8 feed line , all you would need to do is add a return line , plumb the hat for the return line , add aeromotive regulator , wire pump directly to the battery with in line fuse , and relays and you have a return style setup.

[Zack]

Chris just go return style! you already have a -8 feed line , all you would need to do is add a return line , plumb the hat for the return line , add aeromotive regulator , wire pump directly to the battery with in line fuse , and relays and you have a return style setup.

You can use the stock feed line as the return line. Thats what I do.

[MOTOWN]

You can use the stock feed line as the return line. Thats what I do.

I guess that would be an option also.

[BigM460]

Ya'll are killing me!!:cool:
It's looking like I could have $2000 or more invested just to put headers on the car.
Really starting to rethink this whole idea! :(
I mean how much more power could it even make?
Even if I do, I'll still have the second most powerful Marauder in Rome! :shake::bigcry::P

[BigM460]

You can use the stock feed line as the return line. Thats what I do.

Would that work with the larger pump?

[CWright]

Ya'll are killing me!!:cool:
It's looking like I could have $2000 or more invested just to put headers on the car.
Really starting to rethink this whole idea! :(
I mean how much more power could it even make?
Even if I do, I'll still have the second most powerful Marauder in Rome! :shake::bigcry::P


:lol: You are faster than me............... at the moment! :D



http://i1342.photobucket.com/albums/o776/CDUBMERC/Mobile%20Uploads/image_zps48eaded7.jpg (http://s1342.photobucket.com/user/CDUBMERC/media/Mobile%20Uploads/image_zps48eaded7.jpg.html)

[MOTOWN]

Ya'll are killing me!!:cool:
It's looking like I could have $2000 or more invested just to put headers on the car.
Really starting to rethink this whole idea! :(
I mean how much more power could it even make?
Even if I do, I'll still have the second most powerful Marauder in Rome! :shake::bigcry::P

If you want to run with the BIG DAWGS you cant sleep!:nono::snoopy:

[BigM460]

:lol: You are faster than me............... at the moment! :D



http://i1342.photobucket.com/albums/o776/CDUBMERC/Mobile%20Uploads/image_zps48eaded7.jpg (http://s1342.photobucket.com/user/CDUBMERC/media/Mobile%20Uploads/image_zps48eaded7.jpg.html)

Ya, but seriously, how much more power could it make? :fishing:

[CWright]

Ya, but seriously, how much more power could it make? :fishing:


Will know soon............:coolman:

[BigM460]

If you want to run with the BIG DAWGS you cant sleep!:nono::snoopy:

I don't like running! Do like to sleep! :D

[MOTOWN]

I don't like running! Do like to sleep! :D

:mad:No RWHP for you!:eek: LOL

[Zack]

Would that work with the larger pump?

I run two AEM 320's with the stock feed as the return.
No issues.