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

modified fuel rail?

Thread Tools
 
Search this Thread
 
Old Mar 20, 2006 | 02:45 PM
  #1  
ericoo1's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2002
Posts: 83
Likes: 1
From: Fort Worth, TX
Car: 89 silverado,02 s10 blazer
modified fuel rail?

does anyone know what fittings would need to be purchased and how to go about removing the fuel line from the front of the fuel rail in order to convert a factory fuel rail into a rear enter/exit like the one in the picture? I belive I got the picture from Street & Performance's website about a year ago, but can't find any info on it on their website or in the catalog I have from them. Thanks for any help
Attached Thumbnails modified fuel rail?-tpi-rear-exit.jpg  
Reply
Old Mar 22, 2006 | 01:09 PM
  #2  
ericoo1's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2002
Posts: 83
Likes: 1
From: Fort Worth, TX
Car: 89 silverado,02 s10 blazer
has anyone even tried to remove the fuel line from the front passenger side fuel rail? Is it pressed in, threaded? I'm just trying to avoid ruining a good fuel rail by finding out the hard way.
Reply
Old Mar 23, 2006 | 07:23 PM
  #3  
Dave87IROCZ's Avatar
Junior Member
 
Joined: Jun 2005
Posts: 41
Likes: 0
I was wondering the same thing about the fuel line because Im polishing the rails and painting the lines. I think there is a special tool needed to take it apart.
Reply
Old Mar 23, 2006 | 07:36 PM
  #4  
Dokken10's Avatar
Senior Member
20 Year Member
iTrader: (18)
 
Joined: Aug 2005
Posts: 847
Likes: 1
From: Brunswick, Ga.
Car: 91 Formula
Engine: 350 L98 SD TPI
Transmission: 700R4
Axle/Gears: 10 bolt PBR 3:23 disc posi
I just looked at mine and I would say its pressed in. I looks like the line is pressed into a sleeve and then pressed into the rail. I would guess you would have to cut it off, drill whats left out and tap it to fit AN fitting.
Reply
Old Mar 24, 2006 | 10:17 AM
  #5  
ericoo1's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2002
Posts: 83
Likes: 1
From: Fort Worth, TX
Car: 89 silverado,02 s10 blazer
I wonder if I heated the rail with a heat gun if it would expand just enough to pull the line and/or sleeve out? I guess it all else fails I'll just drill it all out, tap it, and plug it off. I'm with Dokken10 on this one, that has been the most obvious thing I've come up with too. When I do, I'll take a couple pictures to either show some one how to do it or how to destroy a good fuel rail . All I know is that when I get this thing put together, those fuel lines will not be in the front of the motor! I'm kind of suprised no one has information on this, I've searched and searched on the web. It seems like it would be something people would want to do.
Reply
Old Mar 24, 2006 | 10:52 AM
  #6  
CreepingDeath94's Avatar
Senior Member
iTrader: (4)
 
Joined: Mar 2006
Posts: 683
Likes: 2
From: Florida
Car: '87 Trans-Am
Engine: LB9 (305 TPI)
Transmission: 700R4
Axle/Gears: 3.42 or 3.73..figuring it out still
I think what most people do is get the fuel rail setup off the corvette or something so they are in a different location...not 100% sure on this though as I dont know exactly where the corvette TPI fuel lines come in.
Reply
Old Mar 24, 2006 | 10:57 AM
  #7  
ericoo1's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2002
Posts: 83
Likes: 1
From: Fort Worth, TX
Car: 89 silverado,02 s10 blazer
from what I've seen, they just enter on the driver's side instead of the passenger side like the F-body.
Reply
Old Mar 27, 2006 | 01:26 PM
  #8  
ericoo1's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2002
Posts: 83
Likes: 1
From: Fort Worth, TX
Car: 89 silverado,02 s10 blazer
well, heating it doesn't work!!!! I heated it with a propane torch and it still never budged. So, I took a cut off wheel to it and just cut it off. I've already encountered my first problem. The sleeve inside the rail has an inside diameter of .300", however, right past the spot where the cross over tube is it narrows to .100", I wonder if I need to drilll this all the way out or if fuel flow will not be effected if I leave it in. I'll post pics tonight.
Reply
Old Mar 27, 2006 | 10:30 PM
  #9  
ericoo1's Avatar
Thread Starter
Junior Member
 
Joined: Oct 2002
Posts: 83
Likes: 1
From: Fort Worth, TX
Car: 89 silverado,02 s10 blazer
It doesn't seem that anyone really cares, but maybe someone will be looking for this information on how to do this some other day. Here's the opening, hard line cut, and cleaned up with a 1/2" drill bit. I'm thinking about drilling the .100" hole to match the .300" opening, taping the hole and plugging it.
Attached Thumbnails modified fuel rail?-factory-inlet-opening-dimensions.jpg   modified fuel rail?-hardline-cut-fuel-rail.jpg  
Reply
Old Apr 20, 2006 | 09:31 PM
  #10  
PETE's Avatar
Supreme Member
iTrader: (1)
 
Joined: Mar 2001
Posts: 1,100
Likes: 0
From: In the corner of my mind!
Car: 1989 TTA #1240
Engine: 3.8 SFI turbo
Transmission: 2004r
Axle/Gears: 3.27
that seems to be a hell of a restriction......


Anyone know if the lt1 lines are like this.(if I use that manifold)
Reply
Old Jan 31, 2023 | 03:29 PM
  #11  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by ericoo1
It doesn't seem that anyone really cares, but maybe someone will be looking for this information on how to do this some other day. Here's the opening, hard line cut, and cleaned up with a 1/2" drill bit. I'm thinking about drilling the .100" hole to match the .300" opening, taping the hole and plugging it.
What did you ever find out many years ago with regards to the center hole in the fuel rail? I'm about to drill it out completely, lol.
Reply
Old Jan 31, 2023 | 04:56 PM
  #12  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

I’ve drilled and taped the restrictor out. Once taped you can use a bolt and heat the rail and remove the restrictor. Actually putting an appropriate socket between the bolt and tighten it will pull the restrictor into the socket opening. Hope that makes sense.
Reply
Old Jan 31, 2023 | 05:19 PM
  #13  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by Tuned Performance
I’ve drilled and taped the restrictor out. Once taped you can use a bolt and heat the rail and remove the restrictor. Actually putting an appropriate socket between the bolt and tighten it will pull the restrictor into the socket opening. Hope that makes sense.
So basically once that restrictor is removed it open just like the rear drivers side where the cold start injector feeds from? I know that restrictor has a hole in the center as well as two holes on each side. You saw no issues?
Reply
Old Jan 31, 2023 | 05:19 PM
  #14  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

Here’s a picture of it. Saw no issues tapping you can’t tap to deep but I got to deal with npt.

https://www.thirdgen.org/forums/tpi/...uel-rails.html
Reply
Old Jan 31, 2023 | 05:29 PM
  #15  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by Tuned Performance
Here’s a picture of it. Saw no issues tapping you can’t tap to deep but I got to deal with npt.

https://www.thirdgen.org/forums/tpi/...uel-rails.html
ok awesome. So this circle is the restrictor ?

Reply
Old Jan 31, 2023 | 05:36 PM
  #16  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

I’m not sure , the feeds on the rails I’ve seen have a slightly crimped piece raised up.
was this filed down and tapped too ?
Reply
Old Jan 31, 2023 | 05:41 PM
  #17  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by Tuned Performance
I’m not sure , the feeds on the rails I’ve seen have a slightly crimped piece raised up.
was this filed down and tapped too ?

yes. I put it on the mill and shaved it flush. Then I drilled it out with 1/2” drill bit I had it tapped at first with 1/4npt but my fitting wouldn’t go in as far as it should have so then I drilled it out to 1/2” and I’m going to tap it for M14x1.5 fitting to -6AN
Reply
Old Jan 31, 2023 | 05:43 PM
  #18  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?


Looks like it’s steel. The round part sits inside the aluminum rail. When that’s pulled out it looks like it will leave a 3/4” hole. Is that correct ?
Reply
Old Jan 31, 2023 | 05:45 PM
  #19  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?


Here is what it looks like from bottom
Reply
Old Jan 31, 2023 | 05:47 PM
  #20  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

Yes that’s the restrictor. You might try removing. The crip and press fit should hold under pressure but now the crimp is gone not sure I’d trust it. I’ve always heated it up and removed.
Reply
Old Jan 31, 2023 | 05:50 PM
  #21  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

[QUOTE=dctrumpet;6491933]

if I recall it will be a 3/4 hole it’s not real deep it has a stop if I recall so when I did npt I hit the lip and I could only thread in a npt plug a turn or so.
Reply
Old Jan 31, 2023 | 05:50 PM
  #22  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by Tuned Performance
Yes that’s the restrictor. You might try removing. The crip and press fit should hold under pressure but now the crimp is gone not sure I’d trust it. I’ve always heated it up and removed.
so in a nutshell I can just remove that entire metal ring which is the restrictor body ? That will leave 3/4” hole which I can use an adapter to fit my -6AN
Reply
Old Jan 31, 2023 | 06:00 PM
  #23  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

I believe so, I can’t recall the restrictor depth it yeas could drill it out. I’ve see people leave it in and tap like yours and be fine too.
Reply
Old Jan 31, 2023 | 06:04 PM
  #24  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by Tuned Performance
I believe so, I can’t recall the restrictor depth it yeas could drill it out. I’ve see people leave it in and tap like yours and be fine too.
Ok awesome! Do you have anymore photos of your finished work with fitting installed?
Reply
Old Jan 31, 2023 | 06:11 PM
  #25  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?


Just this, I bought a eBay ninth injector hole feed to an6 drilled the regulator body deeper and tapped to 1/4npt I think I’ve done a few for costumers but it’s been along time ago so don’t remember.
Reply
Old Jan 31, 2023 | 06:13 PM
  #26  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,774
Likes: 1,002
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: modified fuel rail?

https://www.ebay.com/itm/31178453580...mis&media=COPY
Reply
Old Jan 31, 2023 | 06:20 PM
  #27  
dctrumpet's Avatar
Senior Member
20 Year Member
iTrader: (10)
 
Joined: Feb 2006
Posts: 767
Likes: 10
From: USA
Engine: 350 TBI W/all Ultimate TBI Mods
Transmission: 700R4 Stage 4
Axle/Gears: 9 Bolt 3.27
Re: modified fuel rail?

Originally Posted by Tuned Performance

Just this, I bought a eBay ninth injector hole feed to an6 drilled the regulator body deeper and tapped to 1/4npt I think I’ve done a few for costumers but it’s been along time ago so don’t remember.
that fitting looks large. The OD looks at 3/4”.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Evilokc
TPI
8
Jan 29, 2022 06:52 PM
GTA1990
Alternative Port EFI Intakes
3
Jan 6, 2019 01:48 PM
emerald91fbird
V6
1
Jan 19, 2012 01:57 PM
Omega
LTX and LSX
14
Dec 23, 2008 03:58 AM
69TPI383
TPI
4
Dec 30, 2001 10:25 PM




All times are GMT -5. The time now is 11:09 AM.