what would be the right injector for 89 5.7 liter iroc - Team Camaro Tech
Team Camaro Tech join team camaro
 



Registered users (free) do not see these large ads

Third Generation 1982-1992


Reply
 
LinkBack Thread Tools
Display Modes
Old Apr 7th, 08, 06:05 PM   #1 (permalink)
Tech Team
 
Join Date: Jun 2007
Location: ct
Posts: 62
what would be the right injector for 89 5.7 liter iroc

i was wondering if any one could tell me the right injector lb s,
for a 89 iroc 5.7 liter.
and is there a way to measure this ,
thanks
mjrad is offline   Reply With Quote Quick reply to this message
Old Apr 7th, 08, 07:32 PM   #2 (permalink)
Senior Tech
 
Join Date: Feb 2006
Location: Newfane, NY
Posts: 356
Re: what would be the right injector for 89 5.7 liter iroc

I believe it is 21lbs. Many run a 24lb injector since it's a common after market size. I think you need a special device to measure the output. A couple place will refurbish your originals as well. Check thirdgen.org

-Dan
__________________
================================================== =
http://www.thesherwoodgang.com/cars/
dsherw00d is offline   Reply With Quote Quick reply to this message
Old Apr 7th, 08, 08:29 PM   #3 (permalink)
 
Join Date: Jan 2008
Location: Indy
Posts: 12
Re: what would be the right injector for 89 5.7 liter iroc

They are 22lbs.I just replaced mine in my 88 5.7.I used bosch design III.But if you get those you have to grind down the intake manifold where the fuel rail bolts to.Check out fuelinjectorconnection.com They had the best prices on injectors.
dustpusher is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 05:21 AM   #4 (permalink)
Super Moderator
 
Everett#2390's Avatar
 
Join Date: Sep 2000
Location: Va Beach VA
Posts: 29,430
Re: what would be the right injector for 89 5.7 liter iroc

I used Accel's 24 lbs injector from Summit Racing for, at the time, $249/set and worked fine with OE ECM and was a direct replacement.
__________________
Give a man a rescued dog for the health of both their souls.
'With age comes wisdom, but then wisdom ages you even more.'Other Stuff' CUBS - 2016 World Series Champions
Everett#2390 is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 09:23 AM   #5 (permalink)
Senior Tech
 
Join Date: Feb 2002
Location: N.W. Washington
Posts: 7,833
Re: what would be the right injector for 89 5.7 liter iroc

Are the Irocs mass air or speed density controlled? If Mass air you will need a meter thats calibrated to the injectors you have, if other than factory. Something to consider.
__________________
Sean

1968 rs, with an old school, antiquated "junkyard, never even had the valve covers off" 354" SB2.2 pump gas motor........

"I aint never seen talking win me nothin'" -Marshawn Lynch
68rs406 is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 01:47 PM   #6 (permalink)
Tech Team
 
Join Date: Jun 2007
Location: ct
Posts: 62
Re: what would be the right injector for 89 5.7 liter iroc

meter?
what meter ,mine is mass air .
mjrad is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 03:29 PM   #7 (permalink)
Senior Tech
 
Join Date: Feb 2002
Location: N.W. Washington
Posts: 7,833
Re: what would be the right injector for 89 5.7 liter iroc

Quote:
Originally Posted by mjrad View Post
meter?
what meter ,mine is mass air .
Mass air meter. I have never worked on an Iroc, but my Mustang is mass air and the mass air "meter" has to be calibrated to injector size, I don't think it's just a Ford thing either, it's how the info is sent to the computer.The mass air meter reads air volume and adjust fuel accordingly, if it thinks its compensating for 19# injectors but there are 24# injectors installed it will run poorly, make sense?
__________________
Sean

1968 rs, with an old school, antiquated "junkyard, never even had the valve covers off" 354" SB2.2 pump gas motor........

"I aint never seen talking win me nothin'" -Marshawn Lynch
68rs406 is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 07:05 PM   #8 (permalink)
Tech Team
 
Join Date: Jun 2007
Location: ct
Posts: 62
Re: what would be the right injector for 89 5.7 liter iroc

so i would i have to have the prom re-flashed with new higher # injectors ,
there is only one type of maf sensor for my stock car ,i dont think taking the screens out or even getting an airfoil would have any effect on controlling the amount of air
that is needed ,so ya re-flash the prom ,right?
thanks
mjrad is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 07:45 PM   #9 (permalink)
Senior Tech
 
Join Date: Feb 2006
Location: Newfane, NY
Posts: 356
Re: what would be the right injector for 89 5.7 liter iroc

You won't have any problem running the 24lb injectors with a stock TPI setup. It may not have the best tune, but with the small increase and that being the only change, it won't be noticeable. I would not mess with the screens or the airfoil - neither are worth much (if any) power - lots of debate on both. The screen removal also makes the MAF unusable as a core should it fail - they have about a $200 core

If you increase airflow (headers/TB) and the injector size, then a change to the code will be needed.

You will find that once you start changing airflow, injectors, programming; it will snowball with little things happening as a result of the previous change. OK if you want to max out performance, but not good if you just want to drive it.

-Dan
__________________
================================================== =
http://www.thesherwoodgang.com/cars/
dsherw00d is offline   Reply With Quote Quick reply to this message
Old Apr 8th, 08, 11:20 PM   #10 (permalink)
Senior Tech
 
Join Date: Feb 2002
Location: N.W. Washington
Posts: 7,833
Re: what would be the right injector for 89 5.7 liter iroc

It's the opposite for my Mustang at least, Mass air makes it's own adjustments after the changes made increasing flow and tune is not affected at all, thats why it's better than speed density for modifications. Speed density has a set calibration and big changes on the intake or exhaust side makes the tune go south. Where mass air doesn't care about anything other than how much air flows through it and adjusts fuel signal accordingly. The problem arises when it's adjusting fuel signal for larger injectors than it's calibrated for. I've seen 5 liters running 10's with a stock type Mass air system and a meter calibrated to bigger injectors, no computer changes.
The only thing holding back a Mass air system is the injectors it's calibrated for. Thats another thing, with mass air (at least on my Mustang) you change the mass air meter calibration, not the computer.
Now I can't imagine they are much different, mass air from Ford to Chevy, but maybe, I know for sure thats how the Ford with the EEC IV computers work, like the 5 liter Mustangs.
__________________
Sean

1968 rs, with an old school, antiquated "junkyard, never even had the valve covers off" 354" SB2.2 pump gas motor........

"I aint never seen talking win me nothin'" -Marshawn Lynch
68rs406 is offline   Reply With Quote Quick reply to this message
Old Apr 9th, 08, 10:00 PM   #11 (permalink)
Gold Lifetime Member
 
Join Date: Mar 2006
Location: Chi-town's South Side
Posts: 2,408
Re: what would be the right injector for 89 5.7 liter iroc

There is a 1989 5.7L IROC-Z for sale not that far from me. The IROC has been for sale for a while. The car has had extensive intake manifold work done, cam headers and rund 30 lb injectors.

Question

1) What type of modification's would this car have needed to run 30 lb injectors?
2) Any issues w/ 30 lb injectors?
__________________
1) 1969 Camaro RS 396 TH 400, 12 bolt 3:73 sold 1994
2) 1984 Z28, 5.0 H.O. T-Tops, G92 3:73, sold 1994
3) 1988 5.7L IROC-Z, sold 1994
4) 1969 Camaro bought 2006, back on the road in 2010
South Side Goons & Hitmen is offline   Reply With Quote Quick reply to this message
Old Apr 13th, 08, 12:16 PM   #12 (permalink)
Senior Tech
 
Join Date: Jan 2007
Location: connecticut
Posts: 1,163
Re: what would be the right injector for 89 5.7 liter iroc

the mass air sensor is only telling the computer how much air is coming into the engine...not how much fuel to funnel into the injectors...the combination of the afm, coolant temp sensor, o2 sensor and so on adjust the injector pulse...if you have 24 lb injectors in place of 21 lb injectors, the o2 sensor will compensate for the larger injector, and shorten the injector pulse...this is true only to an extent,though...the fuel map in the ecm will only go so far...when changing a cam, compression, and soforth, you can easily go past the ecm`s capability to compensate for the increase in fuel and timing reqirements...it would have to be a really snotty rig to require 30 lb inj`s ssgh...those inj`s would prolly support 500 or so hp, i believe...(i think even more, but dont really want to call out numbers cus i`d prolly be wrong...lol)thats a pretty tough number to get with a stock tpi setup imo...
__________________
sometimes you`re the windshield and sometimes you`re the bug...
kustomwerker is offline   Reply With Quote Quick reply to this message
Reply
Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.

Email Address:
Location
Location
First Name
Rather than just Hot69, gotta real name?

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


» Recent Discussions
Engine Stamp Picture -...
Dec 1st, 16 10:51 AM
Last post by 68camarors
Yesterday 11:50 PM
28 Replies, 1,018 Views
Holley fast idle driving...
Yesterday 10:11 PM
Last post by anguilla1980
Yesterday 10:11 PM
0 Replies, 51 Views
Steering wheel loose....
Nov 30th, 16 08:05 PM
Last post by jkinder33
Yesterday 10:10 PM
4 Replies, 213 Views
Front Wheel Back Spacing?
Dec 1st, 16 05:46 PM
by Moonpie
Last post by 3d cad
Yesterday 09:09 PM
14 Replies, 528 Views
kick panel questions
Yesterday 09:02 PM
by 3d cad
Last post by 3d cad
Yesterday 09:02 PM
0 Replies, 56 Views
My 67
Mar 21st, 16 08:39 PM
by 3d cad
Last post by 3d cad
Yesterday 08:52 PM
43 Replies, 3,586 Views
COMP Cams 40th...
Jun 8th, 16 02:50 PM
by V8TV
Last post by V8TV
Yesterday 08:46 PM
24 Replies, 1,129 Views
Another slow 6 banger...
Dec 23rd, 15 07:38 AM
by Gbauer
Last post by Vega$69
Yesterday 08:38 PM
33 Replies, 2,626 Views
LM1 and G31
Dec 3rd, 16 08:41 AM
by fsc66
Last post by davidpozzi
Yesterday 08:27 PM
1 Replies, 135 Views
1968 Silver Camaro
Yesterday 02:51 PM
Last post by bigblockragtop
Yesterday 08:10 PM
7 Replies, 189 Views
Powered by vBadvanced CMPS v3.2.3

All times are GMT -7. The time now is 01:08 AM.



Camaros.net - 2009 AutoForums.com
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.