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Old 03-30-2013, 12:56 PM   #7201
manitou
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With the 1100's and a base of 55 psi at 85% IDC, you need a pump that can can flow 253 l/hr, at 100% IDC you need 298 l/hr. With 55 psi base plus 17 psi boost equals 77 psi, the 340 at 13.5 volts and will only flow around 225 l/hr. You'll either need a boost a pump, a bigger pump or lower your base and HP goals.
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Old 03-30-2013, 04:53 PM   #7202
amalgrover
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Like he said, the fuel pump is what is maxing out, not the injectors. You need a walbro 416 or a boost-a-pump...either one will bump your pump output up to well above 300lph.
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Old 03-30-2013, 08:07 PM   #7203
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Thank you. Picking up a walbro 465 on Monday and go from there
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Old 03-30-2013, 08:50 PM   #7204
manitou
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Quote:
Originally Posted by lil jon View Post
Thank you. Picking up a walbro 465 on Monday and go from there
Do the hard wire while you are at it!
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Old 03-30-2013, 08:52 PM   #7205
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Is base pressure measured with vac connected?


I tried to play with my base pressure vac connected, I have an aeromotive fpr and for some reason I can't get it to go above 43 psi once the car is warmed up?

If I start it up cold and change the fuel pressure I can get it higher. Then I'll do a few pulls and check it again and the gauge will only be at 43 again???
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Old 03-30-2013, 09:02 PM   #7206
manitou
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without vacuum!
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Old 03-30-2013, 09:32 PM   #7207
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I have a really low base pressure then haha.
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Old 03-30-2013, 09:44 PM   #7208
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Quote:
Originally Posted by manitou View Post
Do the hard wire while you are at it!
i have that done all ready thanks tho!!
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Old 03-30-2013, 09:50 PM   #7209
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Increasing the fuel press on an already maxed pump is just going to make it worse

Edit: nvm diff person lol
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Old 03-31-2013, 04:10 AM   #7210
breaksOFTEN
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What do DW1100side feeds like more? high base fuel pressure or low base fuel pressure? Any one played with a fpr to find that "sweet spot"?

I have a lot of adjustability in my fuel system and I want to turn my BAP down so I'm not working the pump so hard, and keep a safe IDC.
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Old 03-31-2013, 08:43 AM   #7211
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DW 1100s like being swapped out for ID1000s (or ID1300s here soon )
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Old 03-31-2013, 09:04 AM   #7212
manitou
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Quote:
Originally Posted by Layvon View Post
DW 1100s like being swapped out for ID1000s (or ID1300s here soon )
Hey I resemble that remark! Haha
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Old 03-31-2013, 09:26 AM   #7213
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Sorry - Had to

I was feeling Witty this morning
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Old 03-31-2013, 09:38 AM   #7214
manitou
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No worries, it's funny and its true!
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Old 03-31-2013, 09:55 AM   #7215
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Anyone running a hardwired Walbro 465 in the 08+ plastic housing? Are you able to get down to stock base pressure? I'm using the Fuelab 545 FPR and can't get below 55psi. Current theory is that the plastic housing is restricting the return and holding the pressure up. Anyone have experience with this before I start cutting up the plastic housing?
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Old 03-31-2013, 01:25 PM   #7216
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Quote:
Originally Posted by Layvon View Post
DW 1100s like being swapped out for ID1000s (or ID1300s here soon )
I'll swap when they come out with the 1300's but till then I just need to make what I have works a bit more efficient.

Last edited by breaksOFTEN; 03-31-2013 at 01:30 PM.
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Old 04-02-2013, 09:24 AM   #7217
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The walbro 465 solved my problem. Now to boost lol
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Old 04-02-2013, 09:37 AM   #7218
manitou
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Quote:
Originally Posted by lil jon View Post
The walbro 465 solved my problem. Now to boost lol
Good on ya! Keep your base at 50 psi or less if you can, it'll be easier on your pump.
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Old 04-02-2013, 01:21 PM   #7219
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Thanks for the tips!!! My tuner (mr slowbaru) will be tuning while I'm in Cali. Hope he races Evo day for me and wins lol. Just trying to have a uber fast ej205 went 11.6 on pump with less boost with bad 60ft. Hope this makes her rip now
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Old 04-02-2013, 06:04 PM   #7220
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phil from flat 4 motorsport is sending my modded pump hanger and walbro 400.

im gonna running it 12v and see the difference of running it 14v.

if i can make 25# of boost on e85 with walbro 400@ 12v @ less than 80% IDC with dw1300s...

im good.
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Old 04-02-2013, 06:25 PM   #7221
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According to the flow charts for the walbro 400@12V, you are going to have to run like 20psi up top to prevent your injectors from out-flowing your fuel pump. At 85% IDC, your walbro should max out close to 20psi...so...you might be able to run 25psi at peak, but then you are going to have to taper it down closer to 20psi by about 5500rpm.



...that is unless you don't care about turning your return style fuel system into a returnless one or about your fuel pressure once this happens...
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Old 04-03-2013, 02:17 AM   #7222
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Two questions:

1. Does anyone know why I can not turn my base fuel pressure up past ~43psi?

I crank the allen screw in on the Aeromotive FPR trying to raise the base pressure but it won't go any higher? I can drop it pretty low, but not any higher. Fuel pump is the Aeromotive 340 powered by the MSD BAP.

2. What's wrong with my fuel pump?

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Old 04-03-2013, 08:35 AM   #7223
manitou
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Quote:
Originally Posted by breaksOFTEN View Post
Two questions:

1. Does anyone know why I can not turn my base fuel pressure up past ~43psi?

I crank the allen screw in on the Aeromotive FPR trying to raise the base pressure but it won't go any higher? I can drop it pretty low, but not any higher. Fuel pump is the Aeromotive 340 powered by the MSD BAP.

2. What's wrong with my fuel pump?
How is your pump wired from battery etc....?

How is your fuel system plumbed? Do you have any photos of the fuel system plumbing?
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Old 04-03-2013, 09:40 AM   #7224
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Quote:
Originally Posted by breaksOFTEN View Post
Two questions:

1. Does anyone know why I can not turn my base fuel pressure up past ~43psi?

I crank the allen screw in on the Aeromotive FPR trying to raise the base pressure but it won't go any higher? I can drop it pretty low, but not any higher. Fuel pump is the Aeromotive 340 powered by the MSD BAP.

2. What's wrong with my fuel pump?

Video Link: http://youtu.be/8ZEjBSyebpo
Saw a car with the same issue and Sounded the same. He hooked the fpr backwards
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Old 04-03-2013, 09:45 AM   #7225
manitou
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Quote:
Originally Posted by wrxsubiemod View Post
Saw a car with the same issue and Sounded the same. He hooked the fpr backwards
That would explain it!
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