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

305 Fuel Injector question

Thread Tools
 
Search this Thread
 
Old 01-08-2009, 07:41 PM
  #1  
Member
Thread Starter
 
Droptop_Z's Avatar
 
Join Date: Jan 2004
Location: Arlington,Washington
Posts: 191
Likes: 0
Received 0 Likes on 0 Posts
Car: 88z
Engine: 305
Transmission: t-5
305 Fuel Injector question

So my intake gasket decided to go the other day, and I noticed a nice little pool of coolant that had seeped out on to the intake manifold. I start to unbolt the TPI and fuel rail and noticed I have two injectors that are pretty filthy. The engine is a stock 305. Do you recommend I get the stock 19lb injectors or has anyone upgraded to the 22lb? Anyone know the difference (besides price) of these 19lb injectors?

http://fuelinjectorconnection.com/sh...d&productId=60

http://cgi.ebay.com/ebaymotors/FIC-F...Q5fAccessories

Will these fit with no modifications?

If you recommend something different, please do not hesitate to share.
Old 01-09-2009, 07:33 AM
  #2  
Supreme Member

iTrader: (3)
 
jamon8's Avatar
 
Join Date: May 2005
Location: Southern IL
Posts: 1,942
Likes: 0
Received 0 Likes on 0 Posts
Car: 88 GTA "Cocaine"
Engine: 350 tpi
Transmission: 700r4
Axle/Gears: 3.27
Re: 305 Fuel Injector question

stock=stock

your computer will thank you
Old 01-09-2009, 08:04 AM
  #3  
Member
 
kozman's Avatar
 
Join Date: Feb 2007
Posts: 127
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 Trans Am
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73 Posi
Re: 305 Fuel Injector question

I believe the first set of Blue Demons are FIC's brand of injectors and the second set are Bosch II injectors(older version). Both will work fine and are direct fit.

Most people on this forum like the Bosch III's for $169, call Jon at FIC, he is graet and will gladly help you choose the right 19lb injector for your car.

For the record, I purchased a set of the Bosch II injectors last year for $124, my 305 car runs like an animal .....

I would maybe upgrade to the Bosch III's based on the rave reviews from this forum. I would check if the Bosch III's are 19lbs, if they are 22lbs, you may have to change your chip.

Again, call Jon at FIC, he will do you right...
Old 01-09-2009, 10:58 AM
  #4  
Senior Member
iTrader: (1)
 
Saculia's Avatar
 
Join Date: Feb 2007
Location: Minneapolis, MN
Posts: 730
Likes: 0
Received 0 Likes on 0 Posts
Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: 305 Fuel Injector question

Get the Bosch Design III from FIC. I have them in my 305 and it runs very well. Start right up. I got the 22 lbs injectors, but my computer has been programmed to run with them. Without prom tuning you will need to stick with the 19 lbs injectors. Call John at FIC, he will take care of you. With the intake runner gaskets and shipping my total cost was around $220. It's some of the best money I have spent on this car.
Old 01-09-2009, 12:45 PM
  #5  
Member

 
Rayvan's Avatar
 
Join Date: Jan 2007
Posts: 177
Likes: 0
Received 0 Likes on 0 Posts
Car: '89 Formula WS6 N10 No T-Tops
Engine: LB9 225HP
Transmission: T5
Axle/Gears: 3:45BW
Re: 305 Fuel Injector question

Originally Posted by Saculia
Get the Bosch Design III from FIC. I have them in my 305 and it runs very well. Start right up. I got the 22 lbs injectors, but my computer has been programmed to run with them. Without prom tuning you will need to stick with the 19 lbs injectors. Call John at FIC, he will take care of you. With the intake runner gaskets and shipping my total cost was around $220. It's some of the best money I have spent on this car.
+1
Old 01-09-2009, 12:59 PM
  #6  
Member
Thread Starter
 
Droptop_Z's Avatar
 
Join Date: Jan 2004
Location: Arlington,Washington
Posts: 191
Likes: 0
Received 0 Likes on 0 Posts
Car: 88z
Engine: 305
Transmission: t-5
Re: 305 Fuel Injector question

Thanks for the help guys! Bosch III is what I'll look for.
Old 01-11-2009, 09:20 PM
  #7  
Member
 
tshack's Avatar
 
Join Date: Jan 2008
Location: nor cal
Posts: 129
Likes: 0
Received 0 Likes on 0 Posts
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
Re: 305 Fuel Injector question

Whats the difference between the bosch 2's & the 3's. my bosch 2's came with the 4 hole plates. & are they as noisey as the stock injector.
Old 01-11-2009, 10:52 PM
  #8  
Senior Member
iTrader: (1)
 
Saculia's Avatar
 
Join Date: Feb 2007
Location: Minneapolis, MN
Posts: 730
Likes: 0
Received 0 Likes on 0 Posts
Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: 305 Fuel Injector question

Originally Posted by tshack
Whats the difference between the bosch 2's & the 3's. my bosch 2's came with the 4 hole plates. & are they as noisey as the stock injector.
I don't know about the bosch design IIs, but the IIIs are quieter than stock. My stock injectors were very noisy.
Old 01-12-2009, 05:25 AM
  #9  
Member
iTrader: (1)
 
89transam*pearl's Avatar
 
Join Date: Jun 2007
Location: Halifax, N.S.
Posts: 318
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 T/A
Engine: LB9
Transmission: W/C T-5
Axle/Gears: 10 bolt posi, 3.73 Richmond Gears
Re: 305 Fuel Injector question

Originally Posted by Saculia
Get the Bosch Design III from FIC. I have them in my 305 and it runs very well. Start right up. I got the 22 lbs injectors, but my computer has been programmed to run with them. Without prom tuning you will need to stick with the 19 lbs injectors. Call John at FIC, he will take care of you. With the intake runner gaskets and shipping my total cost was around $220. It's some of the best money I have spent on this car.
I ordered the 22 lb Bosch III's today.
Jon advised that the 22's will work with the stock LB9 ECU and when you do any engine upgrades down the road your good to go with the 22's.
Old 01-12-2009, 07:15 AM
  #10  
Member
 
tshack's Avatar
 
Join Date: Jan 2008
Location: nor cal
Posts: 129
Likes: 0
Received 0 Likes on 0 Posts
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
Re: 305 Fuel Injector question

I better call jon & talk with him.
Old 01-12-2009, 10:44 AM
  #11  
Senior Member
iTrader: (1)
 
Saculia's Avatar
 
Join Date: Feb 2007
Location: Minneapolis, MN
Posts: 730
Likes: 0
Received 0 Likes on 0 Posts
Car: currently a 91 G92.
Engine: 305TPI
Transmission: Borg Warner WC 5 speed
Axle/Gears: 3.42
Re: 305 Fuel Injector question

Originally Posted by 89transam*pearl
I ordered the 22 lb Bosch III's today.
Jon advised that the 22's will work with the stock LB9 ECU and when you do any engine upgrades down the road your good to go with the 22's.
Make sure to program your computer for them. You have to change the injector constant.
Old 01-12-2009, 12:41 PM
  #12  
Senior Member
 
irocuroc's Avatar
 
Join Date: Mar 2008
Location: nj
Posts: 428
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 iroc
Engine: l98
Transmission: tremec
Re: 305 Fuel Injector question

Originally Posted by Saculia
Make sure to program your computer for them. You have to change the injector constant.
NOT IF YOU JUST LOWER THE FUEL PRESSURE TO 38.. THATS WHAT I ALWAYS DO WORKS FINE. BUT YOU HAVE TO HAVE A AFPR. IF YOU DON'T THEN GET THE 19 AND THEN IF YOU DO MODS AND HAVE TO GO BIGGER THAN YOU HAVE TO BUY ANOTHER SET,
Old 01-12-2009, 01:06 PM
  #13  
Member
 
kozman's Avatar
 
Join Date: Feb 2007
Posts: 127
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 Trans Am
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 2.73 Posi
Re: 305 Fuel Injector question

As I said earlier, if you get the Bosch III's you will have to reprogram your chip. If you want to stay stock, go with the Bosch II's, this way you won't have the added expense of AFPR's and reprogramming chips. Jon will tell you the II's are good injectors, the only difference is Bosch III's spray with better atomization and are a newer version.

I have the Bosch II's and my 305 runs great...just my 2 cents.
Old 01-13-2009, 06:53 PM
  #14  
Junior Member
 
watman02's Avatar
 
Join Date: Nov 2006
Location: Cedar Rapids Ia
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Z28
Engine: LB9
Transmission: 5 speed
Axle/Gears: 3.73 limited slip stock
Re: 305 Fuel Injector question

ive purchased a set of type 3 injectors rated for the stock 19lb of my car do i still need to have my chip reprogrammed??
Old 01-13-2009, 06:57 PM
  #15  
Senior Member
 
irocuroc's Avatar
 
Join Date: Mar 2008
Location: nj
Posts: 428
Likes: 0
Received 0 Likes on 0 Posts
Car: 89 iroc
Engine: l98
Transmission: tremec
Re: 305 Fuel Injector question

Originally Posted by watman02
ive purchased a set of type 3 injectors rated for the stock 19lb of my car do i still need to have my chip reprogrammed??
NO THE ORIG IS 19 LBS.. THE CAR HAS NO IDEA WHAT INJECTORS YOU PUT IN. AS LONG AS THEY FLOW THE SAME AS STOCK YOU ARE FINE
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
bryan623
TPI
7
03-22-2021 06:43 PM
redmaroz
LTX and LSX
7
08-16-2015 11:40 PM
kyleb24
Camaros for Sale
2
08-15-2015 08:24 AM
Firechicken86
Engine/Drivetrain/Suspension Parts for Sale
0
08-12-2015 10:07 PM



Quick Reply: 305 Fuel Injector question



All times are GMT -5. The time now is 11:53 PM.