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Discussion Starter · #1 ·
Hey all,

I have a basically stock 90 5.0 with a Paxton s/c 6psi novi 1000 kit on it...I think i'm starving for fuel causing detonation/pinging and hesitation up in highway gears/speed...I have an adjustable fuel pressure regulator coming but am thinking my stock pump is possibly just as big a problem (has been suggested on here that it is) even though I have an fmu...Question is how do I determine what to replace it with???...I go on Jegs but none of the pumps seem mustang specific and they all look different...What will fit in my car, what won't...how do I know????????...What volume pump should I get...Can I get as big/powerful pump as I want for future upgrades or do I need to stay with only what will pump enough for my setup...Is there any draw backs to going with what you need vs. something more powerful....I really want to know if all I need is say a 190lph pump, what would be the draw backs if any of getting something bigger like a 255lph??????...And of couse what I asked earlier how the heck do I know which pump will fit in my tank from websites like Jegs etc?????
Thanks,
Jason
 

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Go to 255 lph. No side effects and its only like $10 more than a 190 lph.
 

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Jason,

It can indeed be confusing! You are correct in that a stock pump is not up to the task. Your Mustang, and most cars with in tank pumps, are universal in fitment. Only the screens and hardware differ. I'd suggest finding a Walpro 255lph pump said to fit the Mustang. Look on Ebay or another parts site and pay attention to the price. Should run you loss than $100.
 

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Discussion Starter · #4 ·
Thanks guys...so any pump will fit then????...Why do they all look different?...I will get the 255lph...

Jason
 

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Many vendors use a generic pic. Some of the more expensive kits have the strainer, but if you are careful with the installation this is not needed.

The pump for a Metro, Accord, Ranger or Mustang would be very hard too distinguish when laid side by side. :smoke:
 

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Discussion Starter · #6 ·
Ok thanks...hey I found this pump on ebay...it is new from a reputable dealer...:
http://cgi.ebay.com/ebaymotors/ws/e...=8029376681&rd=1&sspagename=STRK:MEWA:IT&rd=1
Would this be a good one for me...It says ideal for s/c engines up to 550 hp...but damn I'd be lucky to be pushing 300 with my s/c on a stock 5.0..Is that ok...Ghost said there is no side effects....but the same company offers a 190lph and it said good to like 340hp or something like that...Why wouldn't that be better for me?????...They are the same price so I am all for the larger volume pump....But why is the 255lph so much better when all I am pushing is maybe in the 300hp area and that is only when I am on it at max power...Just want to understand....Thanks

Jason
 

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That's the one to get!

The 'lph' is liters per hour. Most Fords use a return style of fuel delivery. The excess pressurized fuel is just routed back to the tank. At low speeds more fuel goes back to the tank. At wide opent throttle less goes to the return so more volume is needed. With a poweradder the fuel requirements migh strain a 190 to the limit of it's delivery capacity. The 255 has the excess capacity to take care of the fuel requirements.
 
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