Re: '87 tank/fuel pump supplier
 

LS1Nova, since its a returnless system, what do I do with the return fitting or portion of the corvette filter/regulator?

Re: '87 tank/fuel pump supplier
 

You run the return line back to the tank.

Re: '87 tank/fuel pump supplier
 

There you go!
This brings up another question then? What did the factory vehicle use and why aren't they being used? Sorry that's 2 questions!;):chevy:

Re: '87 tank/fuel pump supplier
 

The factory regulator was built into the fuel pump/sender assembly. You can use them, but it requires fuel tank mods that are past a lot of peoples abilities and/or desires since the corvette filterwith the regulator built in is so easy to use. Price probably adds into the equation too as fuel pump modules are not the cheapest.

Re: '87 tank/fuel pump supplier
 

LS1Nova,

Is there anything out there that regulates while in-tank or in the sending unit/assembly that is a direct fit?

Re: '87 tank/fuel pump supplier
 

For an '87 tank? Unfortunatly, no. The newer senders take a completely different type of lock ring and are bigger. I would just use the '87 tank and sender, get a Walbro255 pump or something similar and use the Vette filter.

Re: '87 tank/fuel pump supplier
 

Do you have the part number for that 87 Blazer tank? Or have the dimensions?

I'm trying to find a tank for my 72 Blazer.

Re: '87 tank/fuel pump supplier
 

ls1nova71, you very well at answering question. im still waiting on that blazer build thread mr. ls1nova71. also, i know the weather has been bad all across the united states, so for now you can play with your freeze pops. but when spring hits, let the thread begin.

Re: '87 tank/fuel pump supplier
 

James Jones,

I was taking a closer look at your 87 sending unit. Did make those fittings on top? For feed and return?

Re: '87 tank/fuel pump supplier
 

It's not mine, it's Classic Steel's. It looks like the stock sending unit though.

Re: '87 tank/fuel pump supplier
 

Oh damn my fault. I was wondering how he got those fitting on it. I think mine will only have the slip on type. The one you use with good ole stainless clamps. Will I have to cut them, slip on a fitting and then use a flaring tool?

Re: '87 tank/fuel pump supplier
 

The tank is a Spectra GM15C and the sending unit is a FG12K. This is the setup for the 25 gallon tank. It is 1" shallower then the 31 gal. The sending unit is unmodified, with the exception of some upgraded wiring necessary to run the bugger pump.

Re: '87 tank/fuel pump supplier
 

Awesome, thanks man. You might have just solved the fuel dilemma on my 72 Blazer LQ4 swap.

Re: '87 tank/fuel pump supplier
 

No problem! Hopefully I can add a small contribution to wealth of knowledge on this board.

Re: '87 tank/fuel pump supplier
 

Boy do I need help!! This is a head scratcher for someone with my skill, or lack thereof. I finally got the 87 sending unit, tank, etc.... I hope someone can help.

So my understanding is that LSx engines use high pressure fuel systems(58psi), so what do I do with the sending unit's feed/return/evap lines? I mean it looks like it only takes the good ol' slip fitting that use the traditional hose clamps, isnt this NOT HIGH PRESSURE COMPATIBLE? wont they burst right off at the first moment the pump turns on?
http://i1341.photobucket.com/albums/...pse5c04772.jpg

All your help is very appreciated, hell if you guys lived in Tucson, I'd buy you guys a round of cold beverages.

Re: '87 tank/fuel pump supplier
 

87's were fuel injected, but it was throttle body injection which only runs at around 17-20 psi that's why they were just clamped. The barb on the end of the line will keep the hose on under pressure provided you use fuel injection hose and fuel injection clamps, I like to put two clamps on them with the screw parts opposite of each other. Many have been done this way, a couple of my cars included. If you don't feel comfortable with it you could braze on AN fittings, or if you're good with a flaring tool, you could cut the barb off the end and double flare it.You also could use nylon line with compression fittings as long as you can find the right fittings. Keep in mind you will need some kind of flexible hose, rubber, steel braided, nylon ect. so you can drop the tank if the need ever arises. If you hard line it to the frame, you won't be able to move it and trying to drop the tank will probably damage the lines going into the sender.

Re: '87 tank/fuel pump supplier
 

LS1NOVA,

I have already bought about 20ft of stainless braided TEFLON line with a bunch of hose ends for that stainless line. would the FI clamps work with the stainless line?

Double Flaring seems to be a safer bet, but I dont think I have enough line coming out of the sending unit to work with, unless you believe its enought to double flare. Also, will those double flare fittings directly bolt on to the stainless hose ends?

Re: '87 tank/fuel pump supplier
 

I used some 37* steel fittings, but I had to enlarge the ID to fit the sending unit pipe, then I silver soldered them to the sending unit.
I found the fittings over at the Parker Store in the area of Ajo and Palo Verde.
He also has the female fitting,s BUT after you get the lines to the right length he will need to crimp them. Done Deal !!

Re: '87 tank/fuel pump supplier
 

I wouldn't try to clamp that kind of hose. You will need some kind of fittings to adapt the hose.

Re: '87 tank/fuel pump supplier
 

i cut the ends off my sender and used compression fittings to -6 an on the sender havent leaked yet

Re: '87 tank/fuel pump supplier
 

X2 here...Cut the bead off the end of the tube, use a Parker or Swagelock compression fitting to male AN adapter for the give OD of the steel line coming off the sending unit. The supply tube should be 3/8" od and the return should be 5/16" od.

3/8" Tube: Swagelock fitting:
http://www.swagelok.com/search/find_...7-a5d3fd3672c3
5/16" Tube: Swagelock takes 2 fittings:
http://www.swagelok.com/search/find_...7-a5d3fd3672c3'
And:
http://www.swagelok.com/search/find_...t=SS-600-6-6AN

Hope this helps you find what you need. If you have a Parker Store, they can get you what you need too.

Re: '87 tank/fuel pump supplier
 

What brand of sending unit is that? My spectra one had metric o ring fittings on it. The barbed style of this one makes me wonder if its a carbureted one...?

Re: '87 tank/fuel pump supplier
 

I got this from classic parts #23-546 "gas tank sending unit W/FI, 87-91" is what it reads on the box.

Re: '87 tank/fuel pump supplier
 

Can you tell me what size the fittings are on the sender? I want to order the connections from Summit.

Re: '87 tank/fuel pump supplier
 

I believe its M16x1.5 but I'll double check