TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

doing injectors on 90 iroc 5.7 tpi

Thread Tools
 
Search this Thread
 
Old May 19, 2008 | 10:24 PM
  #1  
karlisdad2005's Avatar
Thread Starter
Junior Member
 
Joined: May 2008
Posts: 24
Likes: 0
Car: 1990 Iroc Z
Engine: TPI 350
Transmission: 700R4
Axle/Gears: Stock Posi 32?
doing injectors on 90 iroc 5.7 tpi

looking for step by step instructions kindof like the fuel pump thread on here to help me get threw this job...also is it just an upper intake gasket kit i need or do i need both?thanx!
Reply
Old May 19, 2008 | 11:05 PM
  #2  
Ward's Avatar
Supreme Member
iTrader: (1)
 
Joined: Aug 1999
Posts: 2,842
Likes: 6
From: Rowlett, TX
Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Re: doing injectors on 90 iroc 5.7 tpi

Fel-pro makes an intake gasket kit that comes with pretty much everything. It doesn't come with an EGR gasket, or throttle body gaskets. I just did mine, I got the fel-pro kit for something like $30 from autozone, TB gasket set for like $7, and EGR gasket was a couple bucks. You can choose not to pull off the EGR, and not to pull apart the throttle body if you want. I went ahead and pulled the lower intake off, and cleaned up everything while it was apart. Also, there's a tech article on replacing the injectors. It's pretty straightforward, just tedious:

https://www.thirdgen.org/injectorswap
Reply
Old Mar 23, 2011 | 12:42 AM
  #3  
Rockin87's Avatar
Junior Member
 
Joined: Mar 2011
Posts: 16
Likes: 0
Re: doing injectors on 90 iroc 5.7 tpi

What size of injectors did you guys end up putting in? Cuz I'm doing an edelbrock intake and I was thinking while I'm in there I may aswell do injectors.
Reply
Old Mar 23, 2011 | 05:04 AM
  #4  
red rock's Avatar
Supreme Member
iTrader: (2)
 
Joined: Sep 2009
Posts: 1,591
Likes: 5
From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: doing injectors on 90 iroc 5.7 tpi

Originally Posted by Rockin87
What size of injectors did you guys end up putting in? Cuz I'm doing an edelbrock intake and I was thinking while I'm in there I may aswell do injectors.
Just remember, if you change the size of the injector (go bigger), you will need to have your ECM chip programmed for a different size injector.
Reply
Old Mar 23, 2011 | 08:33 AM
  #5  
JustCruzin's Avatar
Junior Member
 
Joined: Nov 2010
Posts: 73
Likes: 0
Re: doing injectors on 90 iroc 5.7 tpi

Originally Posted by Rockin87
What size of injectors did you guys end up putting in? Cuz I'm doing an edelbrock intake and I was thinking while I'm in there I may aswell do injectors.

If you plan on new injectors your probably talking Bosch 3's 22lb,ers with just minor mods. Remember to inform your seller that you have an edelbrock intake as the injector mod,s are a little different then the stock TPI
Reply
Old Mar 23, 2011 | 08:43 AM
  #6  
Rockin87's Avatar
Junior Member
 
Joined: Mar 2011
Posts: 16
Likes: 0
Re: doing injectors on 90 iroc 5.7 tpi

K cool thanks. And " red rock" I see you say you have the 52 throttle body. Did you do bbl and did you have to tune your computer to it? And " just cruzin" if you know you can tell me to ha, the guys at the local parts shop seem to think that for either a 52 or 58 mm you don't have to tune anything which I find hard to believe
Reply
Old Mar 23, 2011 | 09:30 AM
  #7  
JustCruzin's Avatar
Junior Member
 
Joined: Nov 2010
Posts: 73
Likes: 0
Re: doing injectors on 90 iroc 5.7 tpi

Originally Posted by JustCruzin
If you plan on new injectors your probably talking Bosch 3's 22lb,ers with just minor mods. Remember to inform your seller that you have an edelbrock intake as the injector mod,s are a little different then the stock TPI

My mistake, stock on a 305 is 19LB 22lb on a 350
Reply
Old Mar 23, 2011 | 09:18 PM
  #8  
red rock's Avatar
Supreme Member
iTrader: (2)
 
Joined: Sep 2009
Posts: 1,591
Likes: 5
From: WI.
Car: 1987 iroc
Engine: 383 TPIS intake, Dyno Don headers
Transmission: 700R4 w/Pro-built Auto/transgo 2-3
Axle/Gears: 3.27/3.70 borg warner 9 bolt
Re: doing injectors on 90 iroc 5.7 tpi

Originally Posted by Rockin87
K cool thanks. And " red rock" I see you say you have the 52 throttle body. Did you do bbl and did you have to tune your computer to it? And " just cruzin" if you know you can tell me to ha, the guys at the local parts shop seem to think that for either a 52 or 58 mm you don't have to tune anything which I find hard to believe
I'm guessing you mean "BBK", if you did, yes i have a BBK 52mm. And no you don't have to reprogram your chip for that. All a throttle body does is allow air to enter the plenum and motor. My plenum and SLP runners and Edelbrock intake have all been ported. I did this in increments, so when i replace my heads and cam, i will have the intake done. I do have a stage 2 chip already in with some other bolt on mods done already done. Any time you get into the motor with cams and heads you should have a dyno tune done for peak performance. Basically if you have a stock motor, a bigger throttle body is a waste of money. I just did a little at a time to save a big chunk of money later down the road. I hope i answered you question correctly.
Reply
Old Mar 23, 2011 | 10:43 PM
  #9  
Rockin87's Avatar
Junior Member
 
Joined: Mar 2011
Posts: 16
Likes: 0
Re: doing injectors on 90 iroc 5.7 tpi

Ya man thanks. And I did mean bbk. I have aftermarket pistons, it's cammed up and has edelbrock heads and runners and intake are on their way. Buy they way that beotch of an intake cost 840 bucks. K I'll grab a 52 bbk from the shop and throw it on a get it tuned. It's tough to find guys to tune these cars up in canada eh, everyones got their stupid speed3s and gti's sitting on the dynos. Thanks for the help man, huge help
Reply
Old Mar 23, 2011 | 10:45 PM
  #10  
Rockin87's Avatar
Junior Member
 
Joined: Mar 2011
Posts: 16
Likes: 0
Re: doing injectors on 90 iroc 5.7 tpi

Oh ya and the reason I don't know all the specs on the upgrade is cuz I bought it from a guy that sent the car away for a rebuild and I never got the exact specs, ha only what parts where done but not the particulars. Ha makes me look like a real dud when people ask what I have done to it
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Steve78LT
Tech / General Engine
4
Feb 24, 2016 12:15 AM
jharrison5
Engine Swap
5
Aug 19, 2015 05:53 PM
wruiz
TPI
15
Aug 13, 2015 09:07 PM
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 12, 2015 03:41 PM
mustangman65_79
Body
3
Aug 11, 2015 03:17 PM




All times are GMT -5. The time now is 09:03 AM.