C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Walbro 400LPH

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Old Mar 5, 2013 | 08:23 PM
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Default Walbro 400LPH

Anyone in the forum install a Walbro 400 in their 90/91 corvette?
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Old Mar 5, 2013 | 10:17 PM
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That is a large pump, what is your goal.
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Old Mar 6, 2013 | 12:54 AM
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A big pump?
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Old Mar 11, 2013 | 12:07 AM
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Thank you for the questions, goal is to be around 600hp to the rear. first dyno pulls are at 524hp and 550 tq at the rear @5300rpm with the current 255 fuel pump. Starving for fuel so I am having bigger rails made with 8an fittings to the pump. Would like to know if anyone has used this particular Walbro 400 fuel pump. I was considering using the 340 stealth, but it would be running at the max.
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Old Mar 12, 2013 | 06:53 PM
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Originally Posted by 666Vette91
Thank you for the questions, goal is to be around 600hp to the rear. first dyno pulls are at 524hp and 550 tq at the rear @5300rpm with the current 255 fuel pump. Starving for fuel so I am having bigger rails made with 8an fittings to the pump. Would like to know if anyone has used this particular Walbro 400 fuel pump. I was considering using the 340 stealth, but it would be running at the max.
I'd like to hear more about this build. Just me throwing spaghetti at the wall but have you considered duel Walboros? I guess depending on how much the 400 cost. What kind of build you got?
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Old Mar 12, 2013 | 08:36 PM
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Yes, was considering two pumps however it looks like the tank will be modified to put in a A1000 efi pump (aeromotive)(over kill,yes) AN8 lines, regulator and bigger rails. Gil Navarez is my tuner @ Shelby American in Vegas. The ingredients are as follows...
383 4 bolt main Block bored to .30 over, decked, line honed

Eagle stroker crank Forged balanced (from HBR)

Eagle H rods Forged

JE Pistons Forged, weighted balanced

AFR 227 (1067) heads 75cc combustion chambers

Harland 1.6 rocker arms .50 off set w/girdle

Lunati Solid lifters

Lunati solid lifter cam 50121LUN - lift .600 in .618 ex
duration 308in/318ex lobe sep 106

Accel/Lingenfelter Super Ram ported/polished to match AFR Heads

Accel 1000 cfm throttle body

42lb green top fuel injectors - each flow checked

Methanol injection Snow Performance

P600 Procharger 5lb boost w/innercooler

MSD Ignition

Still would like to know if anyone has had a 400 Walbro pump put in their 90/91 vette though.
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