FAST 102 and FAST fuel rail = fuel leak. Need better rail bracket
01-25-2014, 02:16 PM
#1
FAST 102 and FAST fuel rail = fuel leak. Need better rail bracket Anyone else having trouble with the fuel rail brackets (stanchions) that come with the FAST fuel rail kit and know of a bolt in bracket that cures the poor fit and fuel leak? The ones that came with the rails hold the rails up just a hair too high and the injectors are leaking.
After mounting the fuel rails on the manifold and building fuel pressure, we are seeing a leak on the driver side but not the passenger. During test fitting I noticed I was able to move the injector up and down a little bit with everything mounted and tightened.
Injectors and o-rings were installed correctly and o-rings were lubricated
All bolts and brackets were checked for proper fitment and torque
It appears the mount brackets are just junk, I found a couple threads where others said they had to make their own brackets. Anyone have a better idea? I would like to find some bolt in brackets that fit properly from the start, I don't want to put grinded up or rigged up brackets on this car.
Thank you!
After mounting the fuel rails on the manifold and building fuel pressure, we are seeing a leak on the driver side but not the passenger. During test fitting I noticed I was able to move the injector up and down a little bit with everything mounted and tightened.
Injectors and o-rings were installed correctly and o-rings were lubricated
All bolts and brackets were checked for proper fitment and torque
It appears the mount brackets are just junk, I found a couple threads where others said they had to make their own brackets. Anyone have a better idea? I would like to find some bolt in brackets that fit properly from the start, I don't want to put grinded up or rigged up brackets on this car.
Thank you!
01-25-2014, 05:03 PM
#3
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i also saw something about thicker o-rings in the external engine section . good luck with fixing it , im waiting on mine to get here and see what im gonna run into...
01-25-2014, 06:37 PM
#5
01-26-2014, 10:27 PM
#6
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I'm curious on this as well I've had some issues with my fuel injectors not "going all the way down" and even though I haven't tried flowing fuel to them yet I'm afraid they may leak as well due to the rails not mounted right and on mine looks like the injector body hits the intake? Not to Hi-jack the thread but has anyone else had a problem like this?
01-26-2014, 10:30 PM
#7
Question - you guys are aware that the 102 is an LS2 based system, correct? And that there are LS1 and LS2 style billet rails as well, correct? If you try to use the LS1 rails YOU WILL develop a leak. The reason is because the direction and shape of the injectors. The LS1 rails have a different angle and the 102 intake also has a different angle. Therefore, a leak. If you get a "stock style" rail from FAST, you'll be fine.
Just putting that out there incase some of you never heard of that. The 102 intake also requires the "skinny" style injectors, not the fatter LS1's.
There's an old FAST 102 thread that covers all of this. And fixes people made regarding everything about the 102's, even the shitty Godspeed TB's.
Just putting that out there incase some of you never heard of that. The 102 intake also requires the "skinny" style injectors, not the fatter LS1's.
There's an old FAST 102 thread that covers all of this. And fixes people made regarding everything about the 102's, even the shitty Godspeed TB's.
Last edited by Sommer86; 01-26-2014 at 10:38 PM.
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01-27-2014, 03:37 PM
#8
Question - you guys are aware that the 102 is an LS2 based system, correct? And that there are LS1 and LS2 style billet rails as well, correct? If you try to use the LS1 rails YOU WILL develop a leak. The reason is because the direction and shape of the injectors. The LS1 rails have a different angle and the 102 intake also has a different angle. Therefore, a leak. If you get a "stock style" rail from FAST, you'll be fine.
Just putting that out there incase some of you never heard of that. The 102 intake also requires the "skinny" style injectors, not the fatter LS1's.
There's an old FAST 102 thread that covers all of this. And fixes people made regarding everything about the 102's, even the shitty Godspeed TB's.
Just putting that out there incase some of you never heard of that. The 102 intake also requires the "skinny" style injectors, not the fatter LS1's.
There's an old FAST 102 thread that covers all of this. And fixes people made regarding everything about the 102's, even the shitty Godspeed TB's.
01-27-2014, 03:38 PM
#9
EDIT: WAS NOT FIXED read posts below
So I fixed it. Turns out it was my fault though. When I started this project there were no instructions with the manifold and the guy I am putting the car together for pre-fit the intake, rails and injectors... so I didn't know the fat o-rings had to be used, or where they were supposed to be used.
For anyone having this issue, if you are using LS1/LS6 style injectors (not LS2) you have to use the fat o-ring on the bottom of the injector. It states this in the instructions but not very clearly, it's actually a little confusing because it says to use those fat o-rings with "LS1/LS6 applications with factory fuel rail"
Thanks for the help everyone,
So I fixed it. Turns out it was my fault though. When I started this project there were no instructions with the manifold and the guy I am putting the car together for pre-fit the intake, rails and injectors... so I didn't know the fat o-rings had to be used, or where they were supposed to be used.
For anyone having this issue, if you are using LS1/LS6 style injectors (not LS2) you have to use the fat o-ring on the bottom of the injector. It states this in the instructions but not very clearly, it's actually a little confusing because it says to use those fat o-rings with "LS1/LS6 applications with factory fuel rail"
Thanks for the help everyone,
Last edited by 00pooterSS; 08-14-2018 at 12:49 PM.
01-27-2014, 08:42 PM
#10
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Question - you guys are aware that the 102 is an LS2 based system, correct? And that there are LS1 and LS2 style billet rails as well, correct? If you try to use the LS1 rails YOU WILL develop a leak. The reason is because the direction and shape of the injectors. The LS1 rails have a different angle and the 102 intake also has a different angle. Therefore, a leak. If you get a "stock style" rail from FAST, you'll be fine.
Just putting that out there incase some of you never heard of that. The 102 intake also requires the "skinny" style injectors, not the fatter LS1's.
There's an old FAST 102 thread that covers all of this. And fixes people made regarding everything about the 102's, even the shitty Godspeed TB's.
Just putting that out there incase some of you never heard of that. The 102 intake also requires the "skinny" style injectors, not the fatter LS1's.
There's an old FAST 102 thread that covers all of this. And fixes people made regarding everything about the 102's, even the shitty Godspeed TB's.
02-20-2014, 02:04 PM
#16
it sucks that we spend all this money on these fancy rails for them to not work properly. I had to open up the hole on the bracket so that i can push down on the rail and lock it in place with the supplied nut. You can also shave down the bottom of the bracket with a carbide burr to thin it out.
Opening up the hole worked, but i am not comfortable. I hate fuel leaks.
Opening up the hole worked, but i am not comfortable. I hate fuel leaks.
08-07-2014, 03:24 PM
#17
So after all this there was yet another fuel leak, after 20 or so phone calls to FAST we got someone on the line that knew what they are talking about, there is apparently a known issue if using 60# injectors, they are a hair shorter than others and need a small shim in the injector bore, you place them in the intake and then mount the injectors again.
After doing this the injectors fit better than ever and do not leak, I even tried my hardest to cause a leak my pushing, pulling, yanking, cussing the injectors and still no leak.
If you are having leak issues with a 102mm intake, call fast and ask them about the injector shim kit they are supposed to supply with the intake to prevent the injectors from leaking.
After doing this the injectors fit better than ever and do not leak, I even tried my hardest to cause a leak my pushing, pulling, yanking, cussing the injectors and still no leak.
If you are having leak issues with a 102mm intake, call fast and ask them about the injector shim kit they are supposed to supply with the intake to prevent the injectors from leaking.
08-11-2014, 02:32 PM
#20
I've sold my 402 build and I'm not going to need my Tony Mamo ported FAST 102 anymore. Anyone interested in a complete intake package?
-It's a ported 102 (the top shell is 100% new, the bottom has about 4-500 miles) that has been painted red
-FAST 102 TB - 100% new (powder coated black)
-FTP 104 Lid - New
-FAST 57lb. injectors (about 4-500 miles on them)
-FAST LS2 fuel rail
-FAST LS2 to LS1 harness adaptors (to run LS2 REQUIRED injectors on an LS1 wire harness)
-MAP sensor and extension to run the MAP in the front hole since it's tight in the back of an F-body.
I have more pics of it all as well.
-It's a ported 102 (the top shell is 100% new, the bottom has about 4-500 miles) that has been painted red
-FAST 102 TB - 100% new (powder coated black)
-FTP 104 Lid - New
-FAST 57lb. injectors (about 4-500 miles on them)
-FAST LS2 fuel rail
-FAST LS2 to LS1 harness adaptors (to run LS2 REQUIRED injectors on an LS1 wire harness)
-MAP sensor and extension to run the MAP in the front hole since it's tight in the back of an F-body.
I have more pics of it all as well.