Crysis450

Hey there i had a couple questions im planing on putting a turbo on my 5.3 i already have the complete turbo kit and and injectors but, am i going to need a fuel pump? mine is rated 55-60 and i was going for around 8lbs

FFDP

iTrader: (2)

A walbro 400 or 450 would support that power no problem on pump gas. Keep fuel pressure at or very close to 58psi and you are fine.

Crysis450

so wouldnt my fuel pump be ok its the stock colorado fuel pump
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FFDP

iTrader: (2)

I have no idea, you never said what you drive, what model, if it's flex fuel or not.

Any non flex fuel stock pump will not support a turbo setup that makes decent power.

Crysis450

Its just a 06 chevy colorado i look online and saw the fuel pump is rated at 55 psi, those wal 450 seems pretty solid and only around 100

FFDP

iTrader: (2)

Yeah GM normally runs 55-60 or often just 58psi for a 4 bar fuel system. Most injectors are also rated at 4 bar (58psi).

What you need to really know is how much the pump can flow. A stock pump that only flows 150-180lph of fuel can't flow enough when you double the power of an engine while running a richer fuel mixture. That's why going to something like a 400 or 450lph pump is wanted, so there is plenty of fuel flow. What I can't tell you is wether or not you need to purchase an aftermarket fuel pressure regulator for your vehicle/setup.

Crysis450

Oh ok makes sense, i am runing the corvette fuel filter regulator

turboal1

Was the truck an I4 or an I5 to begin with ?
Colly's are not Flex Fuel. I would deff change
the pump.

Crysis450

It was a i5

turboal1

You will deff need a diff pump, just changing
to a stock 5.3 requires a pump change in a
Colorado.