Walbro 255 vs DW301 on factory fuel pump wiring
Dec 11, 2011, 05:53 PM
#16
Mrfred, Myles here...
If it means anything, i went from an intank 255 feeding an inline 255 with stock wiring, made 644whp/406tq @ 26psi with a 13.0 AFR out the top... did a rewire and put a 340 intank still feeding the inline 255 and made 660whp/417tq @ 26psi 13.0 AFR out the top... forgot to mention it's on E85
Not quite as good of a test as you though... In the end in my car it was worth about 20whp....
My car is at its extreme though, trying to pull 800hp worth of fuel through 1 fuel pump isnt helping..
If it means anything, i went from an intank 255 feeding an inline 255 with stock wiring, made 644whp/406tq @ 26psi with a 13.0 AFR out the top... did a rewire and put a 340 intank still feeding the inline 255 and made 660whp/417tq @ 26psi 13.0 AFR out the top... forgot to mention it's on E85
Not quite as good of a test as you though... In the end in my car it was worth about 20whp....
My car is at its extreme though, trying to pull 800hp worth of fuel through 1 fuel pump isnt helping..
Dec 11, 2011, 07:14 PM
#18
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I would defiantly rewire the pumps and see how it goes. The Aeromotive draws alot of amps...
Dec 12, 2011, 08:35 AM
#22
Cool let me know what you do. One thing about relays if you have 12v from antoher source in line with the feed to the pump it will cause the relay to stick on.
I was thinking maybe BR pressure switch since it can handle 10amp ran back an just splice into the factory wiring. I feel like a 12v back feed into a pressure switch would not have the same problem that a relay has.
Also another thing we have done that the GM guys to is run the power wire right off the alt. It will be the most voltage you can do. I think they call it hot wiring.
I was thinking maybe BR pressure switch since it can handle 10amp ran back an just splice into the factory wiring. I feel like a 12v back feed into a pressure switch would not have the same problem that a relay has.
Also another thing we have done that the GM guys to is run the power wire right off the alt. It will be the most voltage you can do. I think they call it hot wiring.
Dec 12, 2011, 09:11 AM
#24
Cool let me know what you do. One thing about relays if you have 12v from antoher source in line with the feed to the pump it will cause the relay to stick on.
I was thinking maybe BR pressure switch since it can handle 10amp ran back an just splice into the factory wiring. I feel like a 12v back feed into a pressure switch would not have the same problem that a relay has.
Also another thing we have done that the GM guys to is run the power wire right off the alt. It will be the most voltage you can do. I think they call it hot wiring.
I was thinking maybe BR pressure switch since it can handle 10amp ran back an just splice into the factory wiring. I feel like a 12v back feed into a pressure switch would not have the same problem that a relay has.
Also another thing we have done that the GM guys to is run the power wire right off the alt. It will be the most voltage you can do. I think they call it hot wiring.
Dec 12, 2011, 02:42 PM
#26
All I know is a normal fog style relay if it has any voltage fed back through it will stay on till the other power source is tuned off.
So it will be normal low volt on Start up but ones it switches high volt and the the low volt is fed back it will then stay locked on. Your relay is probably cooler.
So it will be normal low volt on Start up but ones it switches high volt and the the low volt is fed back it will then stay locked on. Your relay is probably cooler.
Last edited by Lucas English; Dec 12, 2011 at 02:44 PM.
Dec 12, 2011, 04:04 PM
#27
All I know is a normal fog style relay if it has any voltage fed back through it will stay on till the other power source is tuned off.
So it will be normal low volt on Start up but ones it switches high volt and the the low volt is fed back it will then stay locked on. Your relay is probably cooler.
So it will be normal low volt on Start up but ones it switches high volt and the the low volt is fed back it will then stay locked on. Your relay is probably cooler.
Dec 17, 2011, 03:05 PM
#30
BTW - I gotta give kudos to STM for their rewire kit. Very nice high current wire, and it has most everything I need.