Is a T-Rex pump really needed?

KasperG

New Member

May 20, 2005

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Dec 8, 2005

#1

• Dec 8, 2005

• #1

If you replace your main fuel pump with a 255 unit; are you still in the need of a t-rex. Assuming you are running a Vortech or any other supercharger. This might be a dumb question, but I think that a 255 per hour pump should provide enough fuel. Please prove me right or wrong

 

OrangeMustangGt

Founding Member

Mar 7, 2002

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Cape Cod, MA

Dec 8, 2005

#2

• Dec 8, 2005

• #2

yeah, i was actually told at my tuner that i should get an inline pump in addition to my 255 hp. I guess its a good idea, but i dont know the specific horsepower that a 255 can support, if i actually need one. Same question as you i guess lol.

 

a50sn95

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Oct 12, 2001

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Elk Grove, CA

Dec 9, 2005

#3

• Dec 9, 2005

• #3

It's my understanding that the T-rex is actually a restriction if you have the 255, because it's only a 190. I'm hoping that someone that really knows will chime in, because I HAVE a T-Rex and a 255 in-tank.....

 

KasperG

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May 20, 2005

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Dec 10, 2005

#4

• Dec 10, 2005

• #4

anybody???

 

KasperG

New Member

May 20, 2005

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Dec 10, 2005

#5

• Dec 10, 2005

• #5

41. Can I use a 190 liter per hour fuel pump by itself and eliminate the T-Rex?
It is not suggested that the 190 LPH fuel pump be used without the T-Rex fuel pump. The biggest single contributing factor to engine damage is inadequate fuel delivery. Supercharged applications should have excess capacity rather than inadequate capacity as the damage that can be incurred is far more expensive to repair than the cost of the fuel pump.
I Got this off the vortech website.... so i quess that if they are not sure that a 190 would supply it, then a 255 should be fine.:SNSign:

 

B

blown&stroked

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Jul 30, 2005

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Dec 10, 2005

#6

• Dec 10, 2005

• #6

I have a 255 and a 190 and when I had my last tune at HPP Manny told me that I needed more fuel and suggested that I go with a Waldon pump,but it will have alot to do with your engine combo.

 

4Jenna

Founding Member

Sep 12, 2001

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AZ

Dec 10, 2005

#7

• Dec 10, 2005

• #7

Yes you need a inline pump..I recc a 255

 

FlyBy763

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Apr 23, 2004

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Palm Bay, FL

Dec 10, 2005

#8

• Dec 10, 2005

• #8

I actually just got back from the dyno today. With my combo I made 325/348 and I was on the verge of going lean almost every pull at the top end. I only have a 255 in tank. If that gives you any idea of what is required. They finally got it to a safe air fuel on the last pull.

 

final5-0

Mustang Master

Apr 6, 2003

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DFW Texas

Dec 10, 2005

#9

• Dec 10, 2005

• #9

FlyBy763 said:

I actually just got back from the dyno today. With my combo I made 325/348 and I was on the verge of going lean almost every pull at the top end. I only have a 255 in tank. If that gives you any idea of what is required. They finally got it to a safe air fuel on the last pull.

Click to expand...

Are you still using stock tb, cam, & heads?

If so, I would think with the 255 pump and 42's, you would not be working that fuel system so hard to go lean like that.

Was your fuel pressure really elevated?

Think your fuel filter might have some kind of issue that may be causing a restriction?

Not sure why ...... but that just don't seem right to me

Grady

 

FlyBy763

Member

Apr 23, 2004

439

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Palm Bay, FL

Dec 10, 2005

#10

• Dec 10, 2005

• #10

final5-0 said:

Are you still using stock tb, cam, & heads?

If so, I would think with the 255 pump and 42's, you would not be working that fuel system so hard to go lean like that.

Was your fuel pressure really elevated?

Think your fuel filter might have some kind of issue that may be causing a restriction?

Not sure why ...... but that just don't seem right to me

Grady

Click to expand...

Yep, Stock Heads, Cam, Throttle body...

Fuel pressure is like 36 with the vacuum line off I believe...I forget what they told me they left it at...34 or 36. The fuel filter is only a year old so I wouldnt think its really that bad, I could be wrong though.

 

OrangeMustangGt

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Mar 7, 2002

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Dec 10, 2005

#11

• Dec 10, 2005

• #11

sorry to hijack the thread, but i also have the 255 high press. intank, and i guess my next question would be, what is a good inline pump that wont restrict the intank?

 

4Jenna

Founding Member

Sep 12, 2001

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AZ

Dec 11, 2005

#12

• Dec 11, 2005

• #12

On 42s, 255 intank/inline on a S-trim @13psi i ran outta fuel at 580rw...the inline helps a TON.