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

Question about 42lb injectors?

Thread Tools
 
Search this Thread
 
Old Dec 29, 2009 | 02:22 PM
  #1  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default Question about 42lb injectors?

I bought my car a couple years ago, and the kid I bought it from gave me the old build sheet with it. It says it has Lucas 42lb injectors. That seems huge to me. Its a mostly stock engine, mild cam, CAI etc. Should I swap to something smaller?
Reply
Old Dec 29, 2009 | 02:24 PM
  #2  
1 Craz28's Avatar
Banned
 
Joined: Nov 2009
Posts: 255
Likes: 0
Default

Maybe some tuners on here can help. But mine suggested 36lb'ers for my build for stock cubes and heads with a honken cam!
Reply
Old Dec 29, 2009 | 02:30 PM
  #3  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

As long as the PCM is tuned for it you're fine. 42# are large, but likely not 'overkill'. Now if you were up in the 60#+ range, that'd be a different story.

How large is the cam, and what type of porting was done?
Reply
Old Dec 29, 2009 | 02:34 PM
  #4  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

Not sure what type of porting was done, he told me they "took a lot of meat out" but didnt really have much more info than that. As far as the cam, I have no idea how to read the specs sheet, but here's a link to the scanned copy of it. Sorry its fuzzy, it's all I've got

http://www5.snapfish.com/slideshow/A...935_108571935/
Reply
Old Dec 29, 2009 | 02:35 PM
  #5  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Yeah, I can't read that - don't have a Snapfish account.
Reply
Old Dec 29, 2009 | 02:36 PM
  #6  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

Oh, didnt realize you had to have an account. Frickin hell.
Reply
Old Dec 29, 2009 | 02:37 PM
  #7  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

Sheet
Attached Thumbnails Question about 42lb injectors?-comp.jpg  
Reply
Old Dec 29, 2009 | 02:37 PM
  #8  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

Hey neat it worked, its never let me post pics before
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

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

 Verdad Gallardo
story-1

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

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Dec 29, 2009 | 02:40 PM
  #9  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

That's the CC503 - a very common and well-liked LT1 cam.

I think the 42#s should be fine for you. How does it idle?
Reply
Old Dec 29, 2009 | 02:42 PM
  #10  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

Originally Posted by RamAir95TA
That's the CC503 - a very common and well-liked LT1 cam.

I think the 42#s should be fine for you. How does it idle?
Like crap. I've had nothing but problems with the car, and it runs a slower E/T than my buddy's mostly stock LT1 car
Reply
Old Dec 29, 2009 | 02:45 PM
  #11  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Hm. I see "aftermarket computer," but who did the tuning? Perhaps it's time for an update.

You could also try swapping in a stock set of 24# injectors picked up for cheap and see if that helps (along with a tune, of course).
Reply
Old Dec 29, 2009 | 02:47 PM
  #12  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

The tune was done by PCMforless.com I believe. I've been searching for info on the company on here, and see quite a few people arent happy with the tune. Quite a few mentioned running rich, which I think I may be as well.
Reply
Old Dec 29, 2009 | 02:54 PM
  #13  
1 Craz28's Avatar
Banned
 
Joined: Nov 2009
Posts: 255
Likes: 0
Default

Do you still have AIR and EGR? An adjustable fuelpressure regulator would help you dial it in! I wish there was a way to run in Power Enrichment mode all the time!
Reply
Old Dec 29, 2009 | 02:56 PM
  #14  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

Yup, still have both unfortunately. Still learning as I go, and a bit worried about chopping stuff up! My boyfriend has offered to help me with that though, I may take him up on it.
Reply
Old Dec 29, 2009 | 03:00 PM
  #15  
1 Craz28's Avatar
Banned
 
Joined: Nov 2009
Posts: 255
Likes: 0
Default

Yes, you know I just found out my AIR check valves and EGR were bad and they did not throw a code. Talk about an exhaust leak! It's all about keeping it cool at idle, that's when things get HOT.
Reply
Old Dec 29, 2009 | 04:25 PM
  #16  
RamAir95TA's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: May 2005
Posts: 9,467
Likes: 8
From: South Jersey
Default

Don't listen to 1 Craz28...please.

An adjustable fuel pressure regulator, at your power level, will not do you any good. Any change you make in fuel pressure will be corrected by injector pulsewidth.

AIR and EGR should have no effect on how the car idles.

Bryan @ PCMforless always tunes slightly to the rich side. You may want to consider getting a good dyno-tune. Where are you located?
Reply
Old Dec 29, 2009 | 04:35 PM
  #17  
LadyDriven's Avatar
Thread Starter
TECH Regular
 
Joined: Jun 2009
Posts: 428
Likes: 0
From: Victoria - Vancouver Island, BC, Canada
Default

I'm in Victoria, BC, Canada, on a god forsaken island in the Pacific Northwest


There's 2 dynos on the island. One is owned by the porsche club, and you can't use it unless you're a member. The other is in a "tuner shop" that specializes in severely ******* up every honda engine they get their hands on - Needless to say, they won't be touching my baby! Vancouver is a 1.5 hour ferry ride from here, there's a few decent shops over there that can dyno tune it, but I'd have to take a full day off work, plus pay over $100 for the ferry trip
Reply
Old Dec 29, 2009 | 06:01 PM
  #18  
James Montigny's Avatar
11 Second Club
iTrader: (13)
 
Joined: May 2006
Posts: 2,843
Likes: 0
Default

42# injectors are fine for they setup as long as the tune is set up for them.

It might be a good idea to do a little troubleshooting and datalogging and determine why it's running so rich.
It's entirely possible that you have a leaky header gasket causing the car to run rich
or an issue with the ignition not firing properly.
Reply
Old Dec 29, 2009 | 11:40 PM
  #19  
Camaro350z2897's Avatar
On The Tree
iTrader: (2)
 
Joined: Oct 2009
Posts: 152
Likes: 0
From: Vancouver, WA
Default

i got some 28's plus cash ill trade ya for the 42's... hehe

the 42's should be perfect for a nice heads/cam motor. as long as the tune is for them.

just get a good tune and im sure it will be a lot nicer. its probably got a bad tune. pcmforless usually does good stuff. perhaps it really was not by them? is there any way you can pull the tune off with a laptop and let someone look at it?
Reply
Old Dec 29, 2009 | 11:46 PM
  #20  
Camaro350z2897's Avatar
On The Tree
iTrader: (2)
 
Joined: Oct 2009
Posts: 152
Likes: 0
From: Vancouver, WA
Default

also, i didnt ask... how exactly is it running? whats it doing thats making it run slow? its throwing no codes?
Reply



All times are GMT -5. The time now is 09:20 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE