Fuel Pump Upgrade

[atriller]

Looking for help...
I just installed a 2.9 whipple with a 3.25 pulley, I have stock fuel pumps with a boost a pump. I just had the car at Mike Posts and it made 589 with only 15lbs of boost (belt slipping) at 5200 rpms. He said the stock pumps were at their limit due to low voltage (alternator) and fuel delivery. I'm going to install the DeatschWerks 340lph kit. 180amp alternator and shorter belt, will i need a retune or can I drive as is?



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[olympic]

New fuel pumps = new tune, no way around it. Also, do your research on alternators! Anything from the local auto parts store or even Ford will not last. Two highly recommended choices are:

Nations - external regulator (runs cooler, last longer) with adjustable voltage. 200 Amp High Output Externally Regulated Alternator for 2003-2004 Ford Mustang Terminator Cobra 4.6L DOHC Supercharger

Ken Miley Junior - a little more budget friendly, lifetime warranty. https://kmjalts.com/

 

[01yellercobra]

Are you running a BAP? If not were you thinking your stock pumps were going to be enough?

Just wondering.

 

[atriller]

Are you running a BAP? If not were you thinking your stock pumps were going to be enough?

Just wondering.

Kenne bells website says stock pumps and a bap is good to 650 I know that's not ideal but it must be ok uf they say it.

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[01yellercobra]

Kenne bells website says stock pumps and a bap is good to 650 I know that's not ideal but it must be ok uf they say it.

Sent from my VS996 using the svtperformance.com mobile app

Personally I'm not a fan of the BAP. Over driving pumps that are already maxed out is bad to me. Along with adding another component to fail. Step up the fuel system to match the blower IMO.

Not to mention that of course a manufacturer is going to say their parts are awesome.