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06-20-2012, 03:23 PM
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#1 |
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Edelbrock Fuel Rails
Anyone else running Edelbrock fuel rails? All my AN fittings were great and not leaking apart from ALL four in the ends of the fuel rails - they say they are 3/8 NPT so I got a 3/8 NPT to -8AN straight adaptor for all four holes and all four leaked. I leaned on them and three stopped but one continued to leak so I backed it out and it had ripped two threads off the end of the fitting. I'm hoping I can save them with a NPT tap I've got coming.
When I tightened them all I can get them in is about 5/16 which is nowhere near the .408 that they are supposed to go in being that they are NPT. Maybe they are regular 3/8? Anyone have problems with their rails leaking?
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92 GT w/Stock Block 347 @ 10.2:1, Flat Top forged probes with forged eagle crank and H beam rods, Canfield 195's with Ed Curtis LS1 springs, Buddy Rawls custom hyd cam, Tmoss ported Victor 5.0, 42lb injectors, 75mm Edelbrock TB, 90mm SCT2400, QH |
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06-21-2012, 02:57 PM
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#2 |
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Stole this from another thread. There's no way NPT fittings should be like this.
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92 GT w/Stock Block 347 @ 10.2:1, Flat Top forged probes with forged eagle crank and H beam rods, Canfield 195's with Ed Curtis LS1 springs, Buddy Rawls custom hyd cam, Tmoss ported Victor 5.0, 42lb injectors, 75mm Edelbrock TB, 90mm SCT2400, QH |
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06-21-2012, 10:31 PM
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#3 |
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You sure its not supposed to be -8ORB?
I dont have Eddy rails, but on my rails i use -8AN to -8ORB fittings for the 4 ends. The ORB fitting seals with an o-ring instead of the AN flare.
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2011 SHO - Tuxedo Black - Livernois MyCal 4+ tune, K&N Typhoon, Magnaflow Tru-X mid-muffler/Dynomax UltraFlo's, 170* t-stat, H&R Sports 04 GT - Comp Orange - New setup coming! John Tymensky Boss Block/3.80 stroker, Foxlake TFS', Hellion kit w/ Comp CT5 8488 Turbo, MM cage, Team Z/MM suspension |
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Pumpkin|
06-22-2012, 04:49 PM
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#4 |
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My Edelbrock rails and 3/8"NPT fittings are fine. You may need to run a tap further into the rail to move the taper further up the fitting.
You are using the right fittings NPT/-an. Fitting brands very also with their NPT sizes that I have seen. By that I mean they may go in further or not as far as other like fittings from a different manufacture.
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642rwhp on a Dyno Dynamics at 14lbs of boost and shut down at 6,200rpms. Shooting for 7,000 and 800rwhp on 20lbs. Dart 4.125"ci, AFR185, Ed Curtis grind, Precission 76mm turbo, 120#injectors on E85, Viper spec'd 6spd, built rear and full Maximum Motorsports suspension. |
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06-22-2012, 05:23 PM
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#5 |
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Got the correct fittings (Russell) and ran a tap 3/18-18 NPT and it is actually the correct size - they now go in one thread deeper. Not much but I'm now only fighting one leak and not four. I used permaseal on them and it seems to be working. At least I didn't screw the entire rail up, but the one that I stripped a thread on now seems to go to the correct depth!?
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92 GT w/Stock Block 347 @ 10.2:1, Flat Top forged probes with forged eagle crank and H beam rods, Canfield 195's with Ed Curtis LS1 springs, Buddy Rawls custom hyd cam, Tmoss ported Victor 5.0, 42lb injectors, 75mm Edelbrock TB, 90mm SCT2400, QH |
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06-22-2012, 07:22 PM
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#6 | |
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Corral Elite Member
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Quote:
On NPT you can simply run the tap in further until you run out of cutting threads if you need/want the depth to seat the fitting further. On mine I used two wraps of teflon tape and cranked them down. Case in point of my first post. My Canton oil filter remote mount has 1/2"NPT ports (x4). I had a Earls and a Summit adapter 1/2"NPT/-8. My Earls fitting seats further in the mount. I even swapped the adapters to the other port and got the same results; Earls seated further.
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642rwhp on a Dyno Dynamics at 14lbs of boost and shut down at 6,200rpms. Shooting for 7,000 and 800rwhp on 20lbs. Dart 4.125"ci, AFR185, Ed Curtis grind, Precission 76mm turbo, 120#injectors on E85, Viper spec'd 6spd, built rear and full Maximum Motorsports suspension. |
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06-22-2012, 07:49 PM
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#7 |
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Mine fit fine too.
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Matt, 90' GT 347, 6037 heads, V1 S-trim, 11psi, B31, SV Intake, BE/Tweecer Tuned. 550rwhp 513tq Bonneville 130 club member. (139.993) 11.48@123 in the 1/4. 04' Marauder 268rwhp/295tq. 03' Sonic Blue Cobra 497rwhp 481tq |
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06-22-2012, 08:22 PM
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#8 |
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retap them
I have done that on every set of eldelbrock rails. They are deff not deep enough. Tim
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86 mustang 418 FTI LS3 Mast intake FTI hyd roller Holley EFI 275 MT Pump gas 93 oct. 9.53 140.73 1.33 60' 6.05 113.58 HR Drag Week 2007 SB-NA Runner Up with help from My wife and daughter's 2 www.flowtechinduction.com www.boozebrothersracing.com |
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