DO NOT UPGRADE YOUR INJECTORS!!!! <-----READ THIS!!! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 08-04-2004, 11:11 AM   #11
Senior Member
True Car Nut
 
95naSTA's Avatar
 
Join Date: Feb 2003
Location: Philly
Posts: 4,508
Thanks: 0
Thanked 0 Times in 0 Posts
95naSTA is on a distinguished road
Default

Quote:
Originally Posted by willwren
Quote:
Originally Posted by 95naSTA
Did you consider the ZZP mini afc?
That won't do anything for you if your fuel injectors are lean at 100% duty cycle.
Are you saying, if your injectors are working as hard as possible and your still lean, it won't help? If so , that makes sense.
Just trying to understand what your saying.
95naSTA is offline   Reply With Quote
Old 08-04-2004, 11:24 AM   #12
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

Yup, the aftermarket injectors can't keep up with even STOCK SSEi ones.

However they're rated higher then your N/A ones.
BonneMeMN is offline   Reply With Quote
Old 08-07-2004, 03:55 PM   #13
Senior Member
Posts like a Camaro
 
Join Date: Jan 2002
Location: Simi Valley, CA
Posts: 971
Thanks: 0
Thanked 1 Time in 1 Post
99BonnevilleSE is on a distinguished road
Default

Well it makes sense they are 36# injectors stock (sounds a bit high but close enough) because for example ZZP makes ~400WHP with the Eaton M90 blower (It'* max limit). 36# injectors are basically good up to ~400WHP, so it basically makes sense. When the factories do injectors, there really is not that much difference in injector designs. The only difference is the size of the holes to determine if its a 21# or a 36#. Not like the injector is actually bigger or something. GM put a bigger injector for saftey because when the injector gets older, it could get clogged a bit so it loses some of its spray capacity, by having a bigger injector can compensate for that and not have any worries about motor'* blowing up. Also have a bigger injector because the */C cars run richer in order to make sure it does not blow up since these engines dont have intercoolers so the */C. So the air inlet temps are very high so run a rich mixture to make sure does not detonate from the hot air inlet temps. Hope that kinda makes sense and put a little light bulb over everybody'* head.
99BonnevilleSE is offline   Reply With Quote
Old 08-09-2004, 12:09 AM   #14
Senior Member
Posts like a Turbo
 
Join Date: Apr 2003
Posts: 342
Thanks: 0
Thanked 1 Time in 1 Post
Steve LS is on a distinguished road
Default

I cant find the tech artical now but a few years back I read one on Thrashers site that stated larger injectors were not necessary, even for some pretty heavily modified cars.
Steve LS is offline   Reply With Quote
Old 08-09-2004, 12:11 AM   #15
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

I recall reading that same article.
willwren is offline   Reply With Quote
Old 08-09-2004, 01:18 AM   #16
Senior Member
True Car Nut
 
Join Date: Jul 2003
Location: Westerville, Ohio 2000 Black SSEi
Posts: 6,127
Thanks: 0
Thanked 0 Times in 0 Posts
Rogue is on a distinguished road
Default

Actually, I had to go to 42.5 lb injectors this weekend. Ran out of fuel in the upper rpms with 14lb of boost. Pegged the injectors at hi 21'*. The engine is moving a ton of air. I'm almost to the end of my MAF table limit. Pushing 1105 with an 1150 limit.
Rogue is offline   Reply With Quote
Old 08-09-2004, 01:25 AM   #17
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Freak.

You are an EXTREME example now for sure. Time to update the sig, too
willwren is offline   Reply With Quote
Old 09-09-2004, 06:08 PM   #18
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Here are the results of my injector servicing:

Approximate pound-per-hour flow: 29.76 30.45 30.79 30.1 29.76 30.79

So I got about 30 lb/hr on average.
J Wikoff is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
(1) Brake upgrade (2) Sway bar upgrade wrair 2000-2005 3 04-04-2012 01:12 PM
FE2 swaybars upgrade: springs upgrade optional or no? Bugsi Performance, Brainstorming & Tuning 7 11-20-2005 09:16 PM
DO NOT UPGRADE YOUR INJECTORS!!!! <-----READ THIS!!! DrJay 1992-1999 2 08-03-2004 11:32 PM
Strongly considering an upgrade...Upgrade complete! randman1 1992-1999 21 06-28-2004 01:14 AM
Nice "little" upgrade (turbo upgrade that is) Burgundy_Boat Lounge 6 09-07-2003 04:36 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:13 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.