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Walbro 400LPH intank pump ? Anyone got any info

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Old Oct 11, 2011 | 12:52 PM
  #301  
norcalSRTrida's Avatar
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From: pleasanton, ca
im running a homemade parallel twin pump setup, and has worked fine for the past 3 yrs.

this 400lph setup intrigues me though. any adverse side effects if i were to run the 400lph intank, and fed it to a 255lph external, inline?
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Old Oct 11, 2011 | 08:11 PM
  #302  
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Originally Posted by norcalSRTrida
im running a homemade parallel twin pump setup, and has worked fine for the past 3 yrs.

this 400lph setup intrigues me though. any adverse side effects if i were to run the 400lph intank, and fed it to a 255lph external, inline?
I would use this as a lift pump only to something as serious as a pair of 044 pumps. Otherwise I would run that pump alone. I would like to see a 400lph inline as well to split the load between the two pumps for high fuel pressures.
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Old Oct 11, 2011 | 08:14 PM
  #303  
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A single 255 pump will flow a LOT more feeding a second pump than having to pump against a fuel pressure regulator. The second pump will practically pull the fuel out of the lift pump. Thats why a lift pump can be much smaller than a primary pump.
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Old Oct 13, 2011 | 08:21 AM
  #304  
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There is a picture of the complete plug and play harness I was talking about. It is the last one I have, I had it saved for myself. It's for sale, $120. Nothing nicer out there.
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Old Oct 13, 2011 | 10:07 AM
  #305  
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Been trying to keep up on this but I may have missed it.

Have we determined if two 400 can fit in the current Buschur DP?
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Old Oct 13, 2011 | 01:38 PM
  #306  
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We've determined it isn't needed in the double pumper.
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Old Oct 15, 2011 | 09:20 AM
  #307  
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Any updates? I'm trying to figure out if I would need to run an aftermarket FPR with one of these pumps and the mods in my signiture?
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Old Oct 15, 2011 | 10:59 AM
  #308  
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From: pleasanton, ca
Originally Posted by batty200
A single 255 pump will flow a LOT more feeding a second pump than having to pump against a fuel pressure regulator. The second pump will practically pull the fuel out of the lift pump. Thats why a lift pump can be much smaller than a primary pump.

from this post it seems it'd be beneficial for the 400lph pump to have the 255 in front of it, inline?

only reason i'm bringing this up is because my car is putting down anywhere from 600-670hp (no idea, i dont use dyno's, just shooting a realistic number from experience) depending on how much boost i run using e85 and 1680cc inj...so i'd be near the edge of maxing out the 400 by itself. but if the inline 255 would help even a little bit, i'd like to use it.
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Old Oct 15, 2011 | 11:50 AM
  #309  
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Originally Posted by drb
Any updates? I'm trying to figure out if I would need to run an aftermarket FPR with one of these pumps and the mods in my signiture?
Heres a how to for installation:

https://www.evolutionm.net/forums/ev...ification.html

Yes a FPR is recommended
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Old Oct 17, 2011 | 11:44 AM
  #310  
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I just got a phone call about the test we had performed on the EVO8-9 sending unit with the 400lph pump in it. I am shocked to say the difference in the pump by itself and installed is small. I expected to find the stock housing very restrictive with that pump in it, it is not.

I will post up some numbers when the actual sheets get back here in my hand, for now though, know that it flows well even in the stock housing.
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Old Oct 17, 2011 | 01:16 PM
  #311  
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in for results! thanks Buschur!
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Old Oct 17, 2011 | 01:20 PM
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Was there ever a doubt? STM proved this to be true a couple of weeks ago when they made 580whp on their Mustang dyno on E85 with this pump in the stock housing. It should be sufficient for nearly 650whp dynojet on E85. Anyone on 93oct only will be set for good with this pump.
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Old Oct 17, 2011 | 01:24 PM
  #313  
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Originally Posted by RyuEvoIX
Was there ever a doubt? STM proved this to be true a couple of weeks ago when they made 580whp on their Mustang dyno on E85 with this pump in the stock housing. It should be sufficient for nearly 650whp dynojet on E85. Anyone on 93oct only will be set for good with this pump.
At any point are you going to post any actual data you found yourself or are you just going to continue to either be critical about others or copy-paste from others?

Signal to noise. Think about it more.
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Old Oct 17, 2011 | 01:31 PM
  #314  
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Originally Posted by razorlab
At any point are you going to post any actual data you found yourself or are you just going to continue to either be critical about others or copy-paste from others?

Signal to noise. Think about it more.
One could say the same about your unhealthy infatuation with following all of my posts in this thread. I am referencing real world data. It doesn't matter the source, the data is real world and proven. Thanks.
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Old Oct 17, 2011 | 06:04 PM
  #315  
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Originally Posted by razorlab
At any point are you going to post any actual data you found yourself or are you just going to continue to either be critical about others or copy-paste from others?

Signal to noise. Think about it more.
Haha, you rock Bryan.
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