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Single 450 + E85 - 650rwhp doable?

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Old Jul 2, 2019 | 11:55 AM
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Default Single 450 + E85 - 650rwhp doable?

Single 450 running E85 with 80lb injectors. Think it be okay for 630-650rwhp through a 6 speed?
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Old Jul 2, 2019 | 04:40 PM
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450 What?
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Old Jul 2, 2019 | 07:57 PM
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Originally Posted by Kfxguy
450 What?
Walbro
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Old Jul 2, 2019 | 09:17 PM
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Originally Posted by 30th t/a
Walbro

Lol. I’m an idiot.
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Old Jul 3, 2019 | 08:50 AM
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in my opinion i always get a bit bigger system in case i wanna go bigger power down the road.

for example. im doing 142lbs injectors with dual 450s thru a th350 just to make sure i dont run out of pump or injectors and i just want 700 750
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Old Jul 3, 2019 | 12:09 PM
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Message sent
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Old Jul 4, 2019 | 12:40 AM
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I was getting 620hp single Walbro 450 with BAP and e85. I have to lower base fuel pressure 4->3 bar to get more flow to pump. Then FIC 1000cc injectors almost 100% IDC
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Old Jul 4, 2019 | 05:46 AM
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Originally Posted by KimmoT
I was getting 620hp single Walbro 450 with BAP and e85. I have to lower base fuel pressure 4->3 bar to get more flow to pump. Then FIC 1000cc injectors almost 100% IDC
What transmission were you running when you made 620rwhp?
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Old Jul 4, 2019 | 06:13 AM
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Originally Posted by 30th t/a
What transmission were you running when you made 620rwhp?
Stock Corvette C5 T56 with spec clutch.
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Old Jul 4, 2019 | 08:29 AM
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Anyone have experience with the Walbro 525? I searched on this site but theres very little info on it.
Is it a drop in replacement like the 450?

Last edited by 30th t/a; Aug 6, 2019 at 10:06 AM.
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Old Aug 6, 2019 | 10:07 AM
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Walbro 525??...Anyone with experience with this pump?
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Old Aug 6, 2019 | 10:28 AM
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The 525 is a stock Hellcat fuel pump. There shouldn't be any concerns with an OEM pump.
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Old Aug 6, 2019 | 12:09 PM
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Originally Posted by JoeNova
The 525 is a stock Hellcat fuel pump. There shouldn't be any concerns with an OEM pump.
Do you know if I can run this Walbro 525 in my 02 WS6? Is it a drop in (like the walbro 450)?
Im hoping this will fit in the bucket and I can hook up a hot wire kit and be done and be good for 630-650 on e85.
They say the pump supports 700+ on e85.
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Old Aug 6, 2019 | 02:19 PM
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Originally Posted by 30th t/a
Do you know if I can run this Walbro 525 in my 02 WS6? Is it a drop in (like the walbro 450)?
Im hoping this will fit in the bucket and I can hook up a hot wire kit and be done and be good for 630-650 on e85.
They say the pump supports 700+ on e85.
It's same size and direct swap for a walbro 450. Make sure you have 10ga wires and proper size fuse
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Old Aug 11, 2019 | 10:10 PM
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Originally Posted by KimmoT
I was getting 620hp single Walbro 450 with BAP and e85. I have to lower base fuel pressure 4->3 bar to get more flow to pump. Then FIC 1000cc injectors almost 100% IDC
Was that with stock lines?
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Old Aug 12, 2019 | 11:22 AM
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Originally Posted by dumetre
Was that with stock lines?
Yes i had stock lines from tank to engine bay. When add adjustable fuel pressure regulator, then only change fuel rails and those short fuel lines.
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Old Aug 12, 2019 | 05:14 PM
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Maybe these will help.

Walbro 450lph pump flow chart


and the Hellcat pump
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Old Aug 14, 2019 | 06:12 AM
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Originally Posted by dumetre
Was that with stock lines?
The outlet line on a 525 is larger than a 450. I was going to go with one, but most of the modular fuel pump assemblies do not have a large enough line. They went from a 10mm to an 11 mm outlet. Doesn't seem like much until you try cramming that rubber fuel line over the outlet and realize it isn't going to fit.
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