Fuel pump upgrade

D

dkrupp79

Member

May 31, 2025

4

2

13

Georgia

Jul 7, 2025

#1

• Jul 7, 2025

• #1

I have a stock bottom end 1991 with the following,

Ported Windsor Jr heads
B303 cam
GT40 upper and lower intakes
24 lb injectors
BBK 75mm throttle body, mass air sensor and cold air intake
BBK shorty headers, X pipe and Flowmasters

My question is, should I upgrade my fuel pump?

I plan on putting a 100 shot of nitrous and getting it tuned by a local speed shop.

 

AeroCoupe

lube between the nut and the face. I know my lubes

Founding Member

Oct 28, 2001

5,796

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Claremore, OK

Jul 7, 2025

#2

• Jul 7, 2025

• #2

Well if it is the stock pump then it is 34 years old and you want to risk your motor on that with a nitrous setup? Do yourself a favor and put a Walbro 255 lph pump in it.

 

D

dkrupp79

Member

May 31, 2025

4

2

13

Georgia

Jul 7, 2025

#3

• Jul 7, 2025

• #3

Thanks, should I replace the ecu with a Megasquirt, since it's 34 years old as well?

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

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Box behind Walmart

Jul 7, 2025

#4

• Jul 7, 2025

• #4

There's a pretty good chance that you will run out of fuel with a significant hit.

dkrupp79 said:

Thanks, should I replace the ecu with a Megasquirt, since it's 34 years old as well?

Click to expand...

Not necessarily. I would, however, send it in to https://www.theecuexchange.com/ for a comprehensive check and refit.

 

Reactions: AeroCoupe

Scrapla347

Active Member

Apr 23, 2020

200

67

38

Florida

Jul 10, 2025

#5

• Jul 10, 2025

• #5

Get a 255 lph and call it a day.