Too many diameter changes in fuel lines?
Thread Starter
On The Tree
Joined: Aug 2016
Posts: 130
Likes: 9
Too many diameter changes in fuel lines? Long and short of it is I'm planning my fuel system and I'm wondering if there's such a thing as too many step-ups and step-downs?
I was planning on going with all Holley equipment and my cell is an ATL. I want to feed with 8an and use a 6an return. Here's the perceived problem: The line out of the cell is 8an to a 3/8 inlet pre-filter, then out a 3/8 outlet to a 10an inlet on the pump. The pump outlet is 8an going into another 3/8 inlet post filter, out a 3/8 outlet and stepped back up to 8an. 8an through the FPR and into the fuel rail.
Equipment I'm looking at is an 80 gph billet pump and 100 gph filters on either side. The FPR is 8an in and out with 6an return so that's easy enough. I was hoping using all Holley equipment would make it as easy as 8an inlets/outlets across the board, but they don't show any filters in that size. Am I doing this the hard way or overthinking it?
I was planning on going with all Holley equipment and my cell is an ATL. I want to feed with 8an and use a 6an return. Here's the perceived problem: The line out of the cell is 8an to a 3/8 inlet pre-filter, then out a 3/8 outlet to a 10an inlet on the pump. The pump outlet is 8an going into another 3/8 inlet post filter, out a 3/8 outlet and stepped back up to 8an. 8an through the FPR and into the fuel rail.
Equipment I'm looking at is an 80 gph billet pump and 100 gph filters on either side. The FPR is 8an in and out with 6an return so that's easy enough. I was hoping using all Holley equipment would make it as easy as 8an inlets/outlets across the board, but they don't show any filters in that size. Am I doing this the hard way or overthinking it?
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Long and short of it is I'm planning my fuel system and I'm wondering if there's such a thing as too many step-ups and step-downs?
I was planning on going with all Holley equipment and my cell is an ATL. I want to feed with 8an and use a 6an return. Here's the perceived problem: The line out of the cell is 8an to a 3/8 inlet pre-filter, then out a 3/8 outlet to a 10an inlet on the pump. The pump outlet is 8an going into another 3/8 inlet post filter, out a 3/8 outlet and stepped back up to 8an. 8an through the FPR and into the fuel rail.
Equipment I'm looking at is an 80 gph billet pump and 100 gph filters on either side. The FPR is 8an in and out with 6an return so that's easy enough. I was hoping using all Holley equipment would make it as easy as 8an inlets/outlets across the board, but they don't show any filters in that size. Am I doing this the hard way or overthinking it?
I was planning on going with all Holley equipment and my cell is an ATL. I want to feed with 8an and use a 6an return. Here's the perceived problem: The line out of the cell is 8an to a 3/8 inlet pre-filter, then out a 3/8 outlet to a 10an inlet on the pump. The pump outlet is 8an going into another 3/8 inlet post filter, out a 3/8 outlet and stepped back up to 8an. 8an through the FPR and into the fuel rail.
Equipment I'm looking at is an 80 gph billet pump and 100 gph filters on either side. The FPR is 8an in and out with 6an return so that's easy enough. I was hoping using all Holley equipment would make it as easy as 8an inlets/outlets across the board, but they don't show any filters in that size. Am I doing this the hard way or overthinking it?
Personally I would just buy those with -12 as they have larger filter elements inside and will cope with higher flow more easily before any restriction ( they rate them at 260gph )...then just adapt them down to whatever hose fitting you need.
And your filters will only be 3/8, if you choose to buy them with 3/8...but I would avoid using NPT fittings unless it was absolutely necessary...which of course it isnt.
Thread Starter
On The Tree
Joined: Aug 2016
Posts: 130
Likes: 9
I guess I was trying to match the pump flow rate too closely and overlooked the fact that a higher rated GPH filter won't hurt anything. Seems Holley's 175 GPH filters are -8 in and out for both 10 and 100 micron. Looks like that'll work. Or just get started on the "go big or go home" game...
There is are always size changes because of the filters, so no need to worry there. And yes, if your filter flows just enough clean then it wouldn't take much dirt to make if flow to little. The larger filters will give you a longer service life between changes or cleanings.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
And most of the "bigger" filters are only bigger internally most use the same size outer shell anyway so it's not like they take up more room
Get the -12 260gph filters then you'll always be covered. You need male/male adaptors for them anyway, so buying them with a small -8 just seems pointless and of no real benefit.
You may never need larger.....but if you buy -8 you cannot go larger.
Buy -12 from the outset and you can step down to any size you want
Get the -12 260gph filters then you'll always be covered. You need male/male adaptors for them anyway, so buying them with a small -8 just seems pointless and of no real benefit.
You may never need larger.....but if you buy -8 you cannot go larger.
Buy -12 from the outset and you can step down to any size you want
Trending Topics
Thread Starter
On The Tree
Joined: Aug 2016
Posts: 130
Likes: 9
And most of the "bigger" filters are only bigger internally most use the same size outer shell anyway so it's not like they take up more room
Get the -12 260gph filters then you'll always be covered. You need male/male adaptors for them anyway, so buying them with a small -8 just seems pointless and of no real benefit.
You may never need larger.....but if you buy -8 you cannot go larger.
Buy -12 from the outset and you can step down to any size you want
Get the -12 260gph filters then you'll always be covered. You need male/male adaptors for them anyway, so buying them with a small -8 just seems pointless and of no real benefit.
You may never need larger.....but if you buy -8 you cannot go larger.
Buy -12 from the outset and you can step down to any size you want
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
