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

Injector Question

Thread Tools
 
Search this Thread
 
Old Feb 23, 2009 | 11:35 AM
  #1  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default Injector Question

Buddy of mine has a 383 lt1 with 30 lb injectors. It feels like the car falls off on the big end, are the 30 lb injectors big enough or should he go bigger? He is also running a 175 shot of n2o
Reply
Old Feb 23, 2009 | 12:04 PM
  #2  
Formula-95's Avatar
Teching In
 
Joined: Mar 2007
Posts: 37
Likes: 0
From: Texass
Default

personally i'd go with something a little bigger
Reply
Old Feb 23, 2009 | 12:06 PM
  #3  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default

any suggestions on size??
Reply
Old Feb 23, 2009 | 12:32 PM
  #4  
DAVE00's Avatar
TECH Fanatic
15 Year Member
iTrader: (10)
 
Joined: Jul 2007
Posts: 1,739
Likes: 2
From: Houston, TX
Default

When I spoke to Lloyd Elliot about my cam swap he said that 30 SVO's are typically good upto 425 RWHP. But as most will tell you there is now way to tell unless you scan it and see what the Inj Duty Cycle are at and if you are peaking past 95+%. Might want to look at 37# if you are set on getting new injectors.
Reply
Old Feb 23, 2009 | 01:31 PM
  #5  
lifeisgood's Avatar
11 Second Club
iTrader: (4)
 
Joined: Oct 2006
Posts: 1,029
Likes: 0
From: ky
Default

42's. they give you some breathing room
Reply
Old Feb 23, 2009 | 01:36 PM
  #6  
wrd1972's Avatar
TECH Veteran
20 Year Member
Photogenic
Photoriffic
iTrader: (12)
 
Joined: Mar 2006
Posts: 4,668
Likes: 5
From: Central Kentucky
Default

My 30# SVO's were hitting 91% DC at 412 RWHP. I now have racetronix 37# (untuned) and I dont yet know the new DC's.
Reply
Old Feb 23, 2009 | 01:40 PM
  #7  
JB_97ws6TA's Avatar
TECH Fanatic
iTrader: (6)
 
Joined: Oct 2007
Posts: 1,118
Likes: 0
From: Central Valley, CA
Default

^^^did you notice your car running rich from switching to the larger injectors with no tune??
Reply
Old Feb 23, 2009 | 01:52 PM
  #8  
fergymoto's Avatar
12 Second Club
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (129)
 
Joined: Aug 2005
Posts: 2,810
Likes: 3
From: Rock Hill, SC
Default

30lb injectors are probably on the small side. My 383 wouldn't cut it on 30lb SVOs. I had to step up to some 42lb Racetronix. 37lb would probably be fine too. I had room to grow with the 42s.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-1

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-2

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-3

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-4

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-5

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-6

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-7

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-8

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-9

10 Camaros You Should Never Buy

 
Old Feb 23, 2009 | 02:27 PM
  #9  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default

would the 42's be enough to handle a 300 shot?
Reply
Old Feb 23, 2009 | 02:29 PM
  #10  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

A 300 shot is no joke. Injector selection will likely be the least of your worries with a shot that big.

OTOH, chances are good 42# injectors won't be enough.
Reply
Old Feb 23, 2009 | 02:37 PM
  #11  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default

it will be a while before he gets the 300 shot in there. what is the best injector for around $300?
Reply
Old Feb 23, 2009 | 02:43 PM
  #12  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default

just did a search in the threads and found a set that i think we will go with. thanks for the help from all of ya'll
Reply
Old Feb 23, 2009 | 02:43 PM
  #13  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Delphi/SVOs are good choices. I'm using Delphi 42#s.
Reply
Old Feb 23, 2009 | 03:05 PM
  #14  
1badzee's Avatar
TECH Junkie
iTrader: (12)
 
Joined: Sep 2007
Posts: 3,011
Likes: 0
From: SFL
Default

Delphi 42s
Reply
Old Feb 23, 2009 | 03:12 PM
  #15  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default

http://fuelinjectorconnection.com/sh...&productId=179

these are one set that was recommended to me?
Reply
Old Feb 23, 2009 | 03:19 PM
  #16  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

I don't like the fact that they've been "modified" and that they provide a range of flow rates. Delphi or SVO, hands down.
Reply
Old Feb 23, 2009 | 03:33 PM
  #17  
wrd1972's Avatar
TECH Veteran
20 Year Member
Photogenic
Photoriffic
iTrader: (12)
 
Joined: Mar 2006
Posts: 4,668
Likes: 5
From: Central Kentucky
Default

Originally Posted by JB_97ws6TA
^^^did you notice your car running rich from switching to the larger injectors with no tune??
Without any tweak to the tune, YES.
Reply
Old Feb 23, 2009 | 03:35 PM
  #18  
95greenmaro's Avatar
Thread Starter
12 Second Club
iTrader: (3)
 
Joined: May 2004
Posts: 265
Likes: 1
From: houston, tx
Default

ok, i will let him now not to go with those.

Last edited by 95greenmaro; Feb 23, 2009 at 04:48 PM.
Reply
Old Feb 23, 2009 | 03:55 PM
  #19  
96capricemgr's Avatar
11 Second Club
iTrader: (1)
 
Joined: Sep 2004
Posts: 11,975
Likes: 15
Default

Many 383s are fine on 30lbs injectors IF the fuel system is up to snuff. I would not assume they are too small just yet.

MANY high rpm power losses are caused by improper or worn out springs but everyone wants to change everything else first.

When folks reccommend an injector ask WHY, the answers will usually center around MARKETING though the person doing the recommending wont realize that is what swayed them.
Reply
Old Feb 23, 2009 | 04:17 PM
  #20  
moehorsepower's Avatar
TECH Addict
iTrader: (3)
 
Joined: Feb 2003
Posts: 2,334
Likes: 17
From: Texas
Default

When you purchase injectors make sure you get the correct impedance or you will need and injector driver...
Reply



All times are GMT -5. The time now is 09:09 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-9
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE