Help with fuel system design for LS1 install

[JNJchev77]

For us dudes with return style fuel rails, what filter is being used?

Is there is WIX filter being used? I'd prefer that, and can I use -6AN fittings with it, push connect possibly?

If so, anyone know if they're 3/8 or 5/16??

Also, does the filter go between the tank and pump, or between the pump and fuel rail?

[BR3W CITY]

I'm using a fuel injection compatible in line filter, iirc its an Earl's. It uses regular -6 AN, no need for PTC except for at the rail. Feed is 3/8, return is 5/16.

pump->filter->engine. You can run a pre-filter, but it needs to have high enough flow to not cause issues with suction. I personally don't/.

[JNJchev77]

Thanks Br3W! I've got the PTC fittings for the fuel rail and was running my braided line and it occurred to me that I forgot about the filter lol. I will check Earl's!

Something like this?? http://www.summitracing.com/parts/TFS-23000/

[mcmlxix]

I bought some 3/8 compression to -6 AN fittings off eBay.... I just had an OEM plastic clip fail on my 04 Impala at the fuel filter. Granted mine are 8 years old, but my suggestion is to pick up a few extras...



For my fuel pump I chose a factory pump for a 2005 Silverado/Sierra that is internally regulated. I am building an oversized tank, 13" deep and will be perfect for the fuel pump assembly. www.vaporworx.com makes a ring (or a kit) out of stainless or aluminum to mount the pump using the factory o-ring and cam lock. If you need a tank thats not as deep (lowered trucks,) they designed the system to use the Gen5 Camaro or CTS-V pumps...

[Bulldog88]

So I have an ls1 with no return and im going to use the stock tank along with a walbro exxternal pump, do I need to also use a wix filter or not? Also can I use braided black hose and just slide it over the sending tube and clamp it?
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[brossow]

Originally Posted by Bulldog88

So I have an ls1 with no return and im going to use the stock tank along with a walbro exxternal pump, do I need to also use a wix filter or not? Also can I use braided black hose and just slide it over the sending tube and clamp it?
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The Wix filter for the Corvette is also a fuel pressure regulator, which you will need. Clamping high-pressure fuel injection hose like you'd do with low-pressure fuel lines is A Bad Idea™.

Refer to this post to see what I did with my LS1.

[Bulldog88]

How do I do a return port if im using the stock tank from a 67 how do I return the fuel back
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[laynrockers]

Ok hoping to bring this thread back to life..

I have a shopping list of the following (see attached picture)

Now what fittings do i need to connect to the SS hose? and How do i make that connection??

[JNJchev77]

laynrockers....

Summit Racing SUM-220690 - Summit Racing® Hose Ends- -6AN hose connector with female 6AN female threads

Make sure to get braided line cutters so the ends don't "fray" or you'll never get the fitting to slide on....

[laynrockers]

Originally Posted by JNJchev77

laynrockers....

Summit Racing SUM-220690 - Summit Racing® Hose Ends- -6AN hose connector with female 6AN female threads

Make sure to get braided line cutters so the ends don't "fray" or you'll never get the fitting to slide on....

Thanks

[JNJchev77]

And if you have the "return style" fuel rails, you don't need that WIX fuel filter. You would want an inline filter for fuel injection.

The fuel filter is for the "returnless" rails.

[laynrockers]

Originally Posted by JNJchev77

And if you have the "return style" fuel rails, you don't need that WIX fuel filter. You would want an inline filter for fuel injection.

The fuel filter is for the "returnless" rails.

I made another thread about that as i had questioned it myself. From what i found out i have a return-less. ( 07 LY5 5.3 )

I had two fuel line going up to rails. One connects to fuel rail, the other left open right by back of block.

[brossow]

Originally Posted by JNJchev77

laynrockers....

Summit Racing SUM-220690 - Summit Racing® Hose Ends- -6AN hose connector with female 6AN female threads

Make sure to get braided line cutters so the ends don't "fray" or you'll never get the fitting to slide on....

Braided line cutter or a Dremel with a cutoff wheel and fiberglass-impregnated packaging tape. I used the latter and it worked beautifully. Wrap the reinforced tape around the area you want to cut, then slice through it with the cutoff wheel. Unwrap the tape and install the AN connector. No fraying, no investment in a tool you'll use rarely if ever again.

Something you SHOULD invest in is AN wrenches so you don't mar the anodized finish. Definitely worth the few bucks extra if you're ordering from Summit anyway.

[laynrockers]

Originally Posted by brossow

Braided line cutter or a Dremel with a cutoff wheel and fiberglass-impregnated packaging tape. I used the latter and it worked beautifully. Wrap the reinforced tape around the area you want to cut, then slice through it with the cutoff wheel. Unwrap the tape and install the AN connector. No fraying, no investment in a tool you'll use rarely if ever again.

Something you SHOULD invest in is AN wrenches so you don't mar the anodized finish. Definitely worth the few bucks extra if you're ordering from Summit anyway.

Got a dremel and will pursue that route. I always wondered why AN fittings have specialty wrenches??

[brossow]

Originally Posted by laynrockers

Got a dremel and will pursue that route. I always wondered why AN fittings have specialty wrenches??

Because they're anodized aluminum and if you try to tighten them with regular steel wrenches you'll mar the finish. DAMHIKT. Buy the Summit brand; they're cheap and well worth the money.

[dman1982]

Originally Posted by laynrockers

Ok hoping to bring this thread back to life..

I have a shopping list of the following (see attached picture)

Now what fittings do i need to connect to the SS hose? and How do i make that connection??

so this is what i need for a return less system right? and what are the qty i need for each? and the braided fuel line size? 3/8?

[mooseknuckles]

you can use your old lines from the tank to the regulator/filter and connect it with fuel injection hose, dual clamp it to be sure.. I then ran a -6an line form reg. to fuel rail...all the proper fittings are available, do a search...there are tons of threads on this.

[68GMCCustom]

yes....get the wrenches...with 2 of the -6 and -8 AN or whatever fittings you use most. Had to install and remove some AN fittings several times and only had 1 set of AN wrenches, so if I needed two -8AN wrenches to put something together I had to use a small crescent for one side. You'd be amazed at how fast those fittings scar up when using the wrong wrench.

[brossow]

Originally Posted by 68GMCCustom

yes....get the wrenches...with 2 of the -6 and -8 AN or whatever fittings you use most. Had to install and remove some AN fittings several times and only had 1 set of AN wrenches, so if I needed two -8AN wrenches to put something together I had to use a small crescent for one side. You'd be amazed at how fast those fittings scar up when using the wrong wrench.

^^ This.

[laynrockers]

Thanks for the info guys

[hector93888]

i got one question i got my set up used the adpters on fuel rail and filter all to 6an fittings my question is i got a some black braided hoses at work it say 5/16 on it is that the same thing a s 6an hose would i be able to use this hose or would i need to buy a 6an hose would hate to do that got free 20 feet of this hose.lol

[brossow]

Originally Posted by hector93888

i got one question i got my set up used the adpters on fuel rail and filter all to 6an fittings my question is i got a some black braided hoses at work it say 5/16 on it is that the same thing a s 6an hose would i be able to use this hose or would i need to buy a 6an hose would hate to do that got free 20 feet of this hose.lol

Just because it has a "braided" outer cover on it doesn't mean that it's pressure rated for fuel injection. Be sure to find out what pressure it can handle before you just assume that it's up to the task. It could be low-pressure rubber fuel line with a fancy braided cover for show. A burst fuel line could destroy your project in seconds -- not worth the risk just to save a few bucks, so check it out before you make a decision.

[68GMCCustom]

that kit should do it with 20'...I would think...with a few more fittings for more terminations. There would be 3 or 4 sections depending on design.

Maybe this has been asked.....but I see some pics of systems with and some without a fuel filter before the pump. I'd be afraid of pump damage due to debris w/o a filter before the pump...then to the vette reg/filter (or just reg. or filter, or nothing) behind the pump. With a new tank one might get lucky, but with an old fuel tank...look out!

Thoughts?

[BR3W CITY]

Maybe this has been asked.....but I see some pics of systems with and some without a fuel filter before the pump. I'd be afraid of pump damage due to debris w/o a filter before the pump...then to the vette reg/filter (or just reg. or filter, or nothing) behind the pump. With a new tank one might get lucky, but with an old fuel tank...look out!

Running a pre-filter is fine, but because of the amount of pressure we run (pressure actually being suction when before the pump) there is a tendency for pre-filters not to have a large enough pass-through and cause restrictions. You can get a large-mesh pre filter to keep rust or in-tank garbage from getting to your pump, although most fine debris that would get in a tank would pass through the impellers on the pump and do no real damage.

You'd have to have something the size of a BB or so to actually damage the impeller.

[High ho silverado]

I'm curious about the sender attachment that was asked earlier, on the older senders how are the hoses being attached, I was thinking of flaring the lines and using an fittings to braided hose, haven't seen any picks of this and was jus curious, ill b using a factory sending unit for an 87 tank with my pump, jus curious how others are doing this, glock didn't cover that in his section, jus that he used 87 tanks, also curious what pumps he used in that set up too. Thanks for any help.
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