PCM Diagnostics & Tuning HP Tuners | Holley | Diablo
Sponsored by:
Sponsored by:

Injectors pegging at 99%

Thread Tools
 
Search this Thread
 
Old 05-05-2005, 10:07 PM
  #1  
8 SEC SLOPPY SHOT!!!
Thread Starter
iTrader: (15)
 
tuff's Avatar
 
Join Date: Oct 2002
Location: lombard,IL
Posts: 1,862
Likes: 0
Received 0 Likes on 0 Posts

Default Injectors pegging at 99%

I have 30 psi svo injecters in my 346 and at wot there at 99% is this normal? I thought there to be at 80% or less.Need some input please.
Old 05-05-2005, 10:09 PM
  #2  
TECH Enthusiast
 
DanO's Avatar
 
Join Date: Apr 2005
Posts: 540
Likes: 0
Received 0 Likes on 0 Posts
Default

you mean 30lb/hr?

and if you really are running 99% it sounds like your fuel pressure is low or your injectors are too small for the power your running
Old 05-05-2005, 10:20 PM
  #3  
8 SEC SLOPPY SHOT!!!
Thread Starter
iTrader: (15)
 
tuff's Avatar
 
Join Date: Oct 2002
Location: lombard,IL
Posts: 1,862
Likes: 0
Received 0 Likes on 0 Posts

Default

Its just a heads and cam car.Im wondering if the injectors were scaled right with my last tune last year.Any other ideas
Old 05-05-2005, 10:22 PM
  #4  
TECH Enthusiast
 
DanO's Avatar
 
Join Date: Apr 2005
Posts: 540
Likes: 0
Received 0 Likes on 0 Posts
Default

i would just check your fuel pressure, make sure your pump hasnt let you down.

Also.. what are you looking at that tells you your hitting 99%?
Old 05-05-2005, 10:30 PM
  #5  
8 SEC SLOPPY SHOT!!!
Thread Starter
iTrader: (15)
 
tuff's Avatar
 
Join Date: Oct 2002
Location: lombard,IL
Posts: 1,862
Likes: 0
Received 0 Likes on 0 Posts

Default

Efi live scan.Ill check in to it to see what the psi is.Im thinking its the scaling on my last tune that could be wrong.
Old 05-05-2005, 10:34 PM
  #6  
TECH Enthusiast
iTrader: (1)
 
Stroker 1500's Avatar
 
Join Date: Mar 2003
Location: fresno, ca
Posts: 613
Likes: 0
Received 0 Likes on 0 Posts
Default

30lb injectors are supposed to support over 500hp on a n/a engine i think i remember reading 550 and thats at like 80% duty cylce. don't know if that was crank or wheel though. Just thought i would throw that in, don't know if its relivant or usefull information
Old 05-05-2005, 10:37 PM
  #7  
8 SEC SLOPPY SHOT!!!
Thread Starter
iTrader: (15)
 
tuff's Avatar
 
Join Date: Oct 2002
Location: lombard,IL
Posts: 1,862
Likes: 0
Received 0 Likes on 0 Posts

Default

Maybe i have more than 500hp Seriously i need to figure this problem out.
Old 05-06-2005, 08:46 AM
  #8  
TECH Fanatic
iTrader: (12)
 
txhorns281's Avatar
 
Join Date: Jan 2004
Location: Houston, TX
Posts: 1,869
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by rcfast
30lb injectors are supposed to support over 500hp on a n/a engine i think i remember reading 550 and thats at like 80% duty cylce. don't know if that was crank or wheel though. Just thought i would throw that in, don't know if its relivant or usefull information
crank
Old 05-06-2005, 08:49 AM
  #9  
TECH Fanatic
iTrader: (12)
 
txhorns281's Avatar
 
Join Date: Jan 2004
Location: Houston, TX
Posts: 1,869
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by tuff
Maybe i have more than 500hp Seriously i need to figure this problem out.
like said, check your fuel pressure at the rail, and rework your IFR table to see if that is correct. No reason why SVO 30#ers should not be able to support your setup, if you need the scalar formula it's in many a post on here.
Old 05-06-2005, 10:08 AM
  #10  
TECH Fanatic
iTrader: (1)
 
RedHardSupra's Avatar
 
Join Date: Sep 2003
Location: Laurel, MD
Posts: 1,904
Likes: 0
Received 1 Like on 1 Post

Default

if you're in lombard, we might wanna talk, i'm in naperville and i just had a similar problem.
aim/yahoo is best to get a hold of them, then email. in the meantime, read the end of this: https://ls1tech.com/forums/showthrea...4&page=4&pp=20

and this http://www.transamws6.net/HPTuners/injectors.xls is your spreadsheet to play with. there's more to this though, gimme a holler and we'll talk.
Old 05-06-2005, 11:37 AM
  #11  
LS1TECH Sponsor
iTrader: (2)
 
foff667's Avatar
 
Join Date: Jul 2003
Location: Clermont, FL
Posts: 7,986
Likes: 0
Received 3 Likes on 3 Posts

Default

i would double check your ifr/pe tables as well as your actual afr via a wideband...i know it made about a 20% change in my ipw's once i finally got my afr where i wanted from where it was stock.
Old 05-07-2005, 12:44 AM
  #12  
8 SEC SLOPPY SHOT!!!
Thread Starter
iTrader: (15)
 
tuff's Avatar
 
Join Date: Oct 2002
Location: lombard,IL
Posts: 1,862
Likes: 0
Received 0 Likes on 0 Posts

Default

Out of injectors need to install bigger ones




All times are GMT -5. The time now is 05:39 AM.