the name or style of the fitting inlet and outlet on the tbi's? i know it's one of GM's custom bubbleflare/o-ring/voodoo fittings, just can't remember what it's called.. similar to an inverted flare, but not...
CK5
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anyone remember..
- Thread starter ryoken
- Start date
1BEATK5
1/2 ton status
Tell yourself thank you. Then tell yourself, your welcome. That keeps the family drama down
My TBI kit came with some adapters that convert that to a regular flared tube to slip a line on. Funky stuff for sure, not sure why GM did what they did sometimes. 
Stomis
Professional Amateur
My TBI kit came with some adapters that convert that to a regular flared tube to slip a line on. Funky stuff for sure, not sure why GM did what they did sometimes.
I dont understand why GM bother using fittings at all. TBI psi range is well within standard hose clamp area.
63chevyll
1/2 ton status
Yeah no kidding.
And some of the imports even today use high pressure rubber line with clamps on MPFI systems
heck, the whole back 1/2 of the system in my CC is clamped...
I'm running a tpi pump now.. it's probably pushing 40 psi thru there now if it was deadheaded... giving that return line a work out...
keeps the fuel polished! 
I'm running a tpi pump now.. it's probably pushing 40 psi thru there now if it was deadheaded... giving that return line a work out...
keeps the fuel polished! 
454Sub
5/8 ton status
If I had to guess, it was that GM figured the fittings and hardline/stainless braided would last longer than hose clamps. Just a guess though
I believe it was a safety thing. (whether real or perceived)
All fittings under the cab/engine compartment were steel/braided. Fittings at the tanks (under bed) were clamp.
Except if it was a K5 or Suburban, then all lines were steel/braided. I believe it was something to do with the passenger compartment. No other reason for the added expense IMO.
All fittings under the cab/engine compartment were steel/braided. Fittings at the tanks (under bed) were clamp.
Except if it was a K5 or Suburban, then all lines were steel/braided. I believe it was something to do with the passenger compartment. No other reason for the added expense IMO.
454Sub
5/8 ton status
I swore against fittings for years. Hated them. Then I got my Suburban and love them to death. I'm about to switch my tranny lines over to braided and fitted. I trust it 10 times more than hose clamps. And I think it just looks much cleaner.
the nuisance is the adapting from the "appease the world, dabble in metric" fitting they ran... if it was NPT or AN, easy peezy right to AN.. and that was the obvious cause of this post, the metric TBI to AN adapter... I'm going to standard reusable ends, steelbraided, yada..
As far as I can tell GM never officially called those fittings anything. They are referred to as Saginaw fittings sometimes, and GM fuel line fittings at others.
The only tool available that (apparently) makes them is about $3-400 http://www.mastercool.com/pages/flaring_tools.html
I don't like the adapter option, as it's an additional connection, and it's aluminum up against steel which is never a good idea IMO. That's personal, they must work ok, they still sell them, and have from years. Adapting multiple fittings on one vehicle starts getting pricey.
The only tool available that (apparently) makes them is about $3-400 http://www.mastercool.com/pages/flaring_tools.html
I don't like the adapter option, as it's an additional connection, and it's aluminum up against steel which is never a good idea IMO. That's personal, they must work ok, they still sell them, and have from years. Adapting multiple fittings on one vehicle starts getting pricey.
I know the 80's steering boxes have "saginaw" fittings to em, similar... I've got the killer Mastercool crimper...
and yeah, it's an additional fail point, but for ease of construction on the whole rest of the fuel system, filter, etc, it's well worth running one of these imo...
and yeah, it's an additional fail point, but for ease of construction on the whole rest of the fuel system, filter, etc, it's well worth running one of these imo...
If you have to run one it's good, if adapting multiple lines it adds up quick...4 of those to a stock system assuming TBI and the Fuel sender.
I've got a couple of rigs that will need fuel lines, "might as well" buy the tool ($56 is close to $400, right?), that way I can route the lines the way I want, instead of trying to make stock lines fit where they don't want to. Which is the way the truck is now.
I've got a couple of rigs that will need fuel lines, "might as well" buy the tool ($56 is close to $400, right?), that way I can route the lines the way I want, instead of trying to make stock lines fit where they don't want to. Which is the way the truck is now.
the Mastercool kills it... one of those "pffft, why didn't I buy this 20's yrs ago" moments...
yeah, I'm going custom tank, filters, so NPT and AN from the TB adapter back..
yeah, I'm going custom tank, filters, so NPT and AN from the TB adapter back..
Have you tried actually making those flares? They apparently aren't exactly how GM made them, but I haven't heard anyone say the flares don't work.
I think you can get the tool that won't do as many fittings, but as soon as you buy the less capable one, you'll need something it won't make.
I think you can get the tool that won't do as many fittings, but as soon as you buy the less capable one, you'll need something it won't make.
no, not yet, only double flares to this point..
GM's got that one newer "push on" hose end for the EFI supply.. requires that goofy clip wrench to take apart.. I just don't like having o-rings in the mix...
I'll stick with NPT and AN whenever I can..
GM's got that one newer "push on" hose end for the EFI supply.. requires that goofy clip wrench to take apart.. I just don't like having o-rings in the mix...
I'll stick with NPT and AN whenever I can..
