LT1-LT4 Modifications 1993-97 Gen II Small Block V8

fuel pressure question

Thread Tools
 
Search this Thread
 
Old Sep 4, 2003 | 07:34 PM
  #1  
yellowpontiac's Avatar
Thread Starter
Teching In
 
Joined: Aug 2002
Posts: 38
Likes: 0
From: texas
Default fuel pressure question

how much would fuel pressure regulator help out as far as et's? i have a 94 lt1 with some bolt-ons and looking to add a fpr. thanks
Reply
Old Sep 4, 2003 | 09:42 PM
  #2  
I8AFORD's Avatar
11 Second Club
iTrader: (4)
 
Joined: Dec 2001
Posts: 1,086
Likes: 1
From: Indiana
Default Re: fuel pressure question

it may help a little ,depends how rich your car is running most LT1s run rich

stock PSI I had 43lbs
the car ran best @39lbs with all boltons

Reply
Old Sep 5, 2003 | 11:37 AM
  #3  
GreekZ's Avatar
Staging Lane
 
Joined: Aug 2003
Posts: 59
Likes: 0
Default Re: fuel pressure question

I have one on my 93 but it's speed density. Won't
the computer on 94-up LT1's set the fuel pressure
back to stock if you do adjust it with a AFPR?
Reply
Old Sep 6, 2003 | 11:03 AM
  #4  
blackcat's Avatar
On The Tree
 
Joined: Jun 2003
Posts: 143
Likes: 0
Default Re: fuel pressure question

GreekZ. How much pressure do you run on your 93?
Reply
Old Sep 7, 2003 | 12:30 AM
  #5  
Gofast's Avatar
On The Tree
 
Joined: Feb 2003
Posts: 179
Likes: 0
From: Grand Rapids, MI
Default Re: fuel pressure question

That is correct the fuel psi will reset to factory 43.5 unless you make some changes in the ECM.
Reply
Old Sep 8, 2003 | 03:33 PM
  #6  
GreekZ's Avatar
Staging Lane
 
Joined: Aug 2003
Posts: 59
Likes: 0
Default Re: fuel pressure question

GreekZ. How much pressure do you run on your 93?
My car was running rich with the custom tune, so I dropped
the FP to 40psi
Reply
Old Sep 17, 2003 | 03:07 AM
  #7  
1LEThumper's Avatar
TECH Apprentice
 
Joined: Jan 2002
Posts: 313
Likes: 0
From: TEXAS
Default Re: fuel pressure question

No the car will not reset itself to stock pressure, it can't but it will change its fuel maps according to the fuel that is being delievered at the new pressure so it can change pulse widths and fuel curves a bit. So weither or not its going to affect things for very long its hard to say. Most people say leave the stocker on there until you need to get a bigger regulator to bypass more fuel...at that point you are going to bigger lines as well.

Save the $100 or so unless your stocker took a dump on you then why not go for an adjustible one at least then you can make sure its where it is suppose to be. But I wouldn't change it just to be changing it.
Reply




All times are GMT -5. The time now is 03:56 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE