Author Topic: EFI fuel lines? (Read 12041 times)

crash340 · « **Reply #30 on:** October 27, 2015 - 04:16:59 PM »

Thanks Rob, re the access panel, makes good sense however, my car is a numbers matching un altered body in any way from the factory so, although Im changing stuff up to make it what I want it I have placed some limitations on myself for the car and that is to not modify the body so no trimming of fender lips and so on. So, same goes for the access panel. I do have 24 hour roadside assist in case of an issue, they simply pick you up on a tilt tray truck and drop you home so its kinda covered. Great idea and I typically would do it in a heart beat but not in this instance.

soundcontrol · « **Reply #31 on:** October 27, 2015 - 04:43:25 PM »

The access panel will be perfect for me though, a very good idea if something happens. With the tank I'm about to get I will get access to both the pump and the sending unit. Thanks!

crash340 · « **Reply #32 on:** October 27, 2015 - 05:44:30 PM »

Quote from: ShelbyDogg on October 27, 2015 - 07:25:53 AM

I would make a small raised access panel right above the pump hole inside the trunk. It will be hidden by your spare and allows you to change the pump without dropping or draining your tank. Many new cars have this.

Your pump may never go out, but think about everything that has to come off just to drop your tank when you are 800 miles from home and have limited tools.

When you install your TBI, move the new map sensor off of the throttle body. Plug the hole, then run a hose to it. Some have been having problems with reversion clogging maps. Read the FAST and other EFI forums to stay up on things.

Thanks Rob, I see on the FAST forum the issue some have had, im now to EFI so where would I mount the MAP sensor if i took it off the TB please

ShelbyDogg · « **Reply #33 on:** October 27, 2015 - 06:29:20 PM »

Use a 6" or longer hose and make a bracket to mount it on the manifold of firewall. The length of hose doesn't matter. The megasquirt EFI has the sensor mounted on the board and some run a 2.5' hose to under the dash. It has been shown not to change the vacuum signal.r

crash340 · « **Reply #34 on:** October 27, 2015 - 08:34:30 PM »

Ok, so what your saying is it simply needs a manifold vacum feed so that can simply come off one of the TBI base plate vacum barbs basically and remote mount the MAP anywhere provided it has a vacum reference from the manifold

ShelbyDogg · « **Reply #35 on:** October 27, 2015 - 09:17:36 PM »

Yes. Your map and pressure regulator both have to see manifold vacuum. Some are leaving the map in the tbi to plug the hole, and wiring in a new one remotely. Same reversion that turns the inside of your manifold black is plugging the sensors. Some engines get it some don't. Overlap or intake backfires, we don't know, but it is happening to some FAST tbi users.

soundcontrol · « **Reply #36 on:** October 28, 2015 - 07:30:51 PM »

How about the filter and regulator, any recommendations?

crash340 · « **Reply #37 on:** October 28, 2015 - 08:13:21 PM »

As far as lines and locations, I asked Rich the following questions pertaining to my particular install, see below for an FYI only
I have a couple of questions if you don�t mind please regarding install.

1.   Fuel feed line from tank
a.   What size? I�m seeing -6 should be enough - (FASTMAN I'd use -8 up and -6 back if it were me)
2.   Fuel return line to tank
a.   I�m seeing -6 is big enough - (FASTMAN YES)
b.   Does the return line need to be high pressure rated or can it be basic barbed fittings -(FASTMAN Barb is fine)
3.   Fuel filter location should be
a.   At the rear of the car near the pump - (FASTMAN Yes)
b.   In the engine bay
4.   Fuel pressure sensor location - (FASTMAN Anywhere)
a.   On the engine
b.   On the firewall
c.   On the inner fender
d.   Down low on the chassis rail where the fuel line is run
5.   Regulator location options - (FASTMAN Anywhere, just in the return)
a.   Mounted on the engine
b.   Mounted on the firewall
c.   Mounted on the inner fender
6.   Throttle body feed, what�s better - (FASTMAN either)
a.   Single feed into one side, return to regulator out of the other
b.   Alternate method

ShelbyDogg · « **Reply #38 on:** October 28, 2015 - 09:25:42 PM »

I use a 3/8 feed line and a 5/16 return behind my 440 and don't have any pressure problems. A #8 is equal to a 1/2" line. That's huge. A 5.7 hemi is a 345 small block. You decide. Most fuel pumps have a small 3/8" inlet and outlet, if they aren't 5/16". My fuel filters come right off of the autozone racks. The pre filter is just a basic straight through metal can, just like on your old Mopar now. The EFI filter is the one that lets a 3/8 brake line end screw on one end and has a 3/8 hose barb on the other end. Nothing fancy and easy to replace on the road. My pump is an external ford e150 van pump, mounted behind my right rear tire. Vacuum referenced Regulator came from jdm performance, it was a little over $20. Been running it for years now. You can see my rails, filters and regulator on YouTube if you search my channel for ez-EFI.

Here is a link to the regulator:
http://www.ebay.com/itm/JDM-Universal-0-140-PSI-Adjustable-Fuel-Pressure-Regulator-W-Gauge-Black-/181629198487?hash=item2a49f1a097:g:bYsAAOSwgNRV82fF&vxp=mtr

Here is a pic of one on a 440:

Pre-filter and pump:

soundcontrol · « **Reply #39 on:** October 29, 2015 - 07:53:35 AM »

Very cool 440 EFI setup Rob! Wow, 21 bucks for a regulator! They start at $130 here in Sweden... cheapest model, thats why I get my parts in the US. I'm gonna run 2 new 3/8 steel lines under the car.

soundcontrol · « **Reply #40 on:** October 31, 2015 - 08:58:04 PM »

What is the best location for the fuel filter? I was thinking near the tank so I just could use a hose from the tank to the filter and then go steel line forwards. I wanna minimize the connections back there in case of leaks. What about those Quick disconnect AN connections in the link? Something with "Quick disconnect" dosen't sound reliable to me....

http://www.tanksinc.com/index.cfm/page/ptype=product/product_id=432/category_id=61/mode=prod/prd432.htm

ShelbyDogg · « **Reply #41 on:** October 31, 2015 - 10:23:44 PM »

This is where I mounted my big block filter. Right on the firewall, where I can get to it easily. My new cars have them here so I copied them.

This is where I mounted the one on the Pace Car:

One of my other cars had the filter right next to the frame rail, in the raised floor section under the passenger seat, so that's where I mounted the one in the Cuda.
Those filters with the quick disconnects are used on many new cars. They seal very well. The filter in the pic above, has one end that a brake line screws on to and the other end has the hose barb or quick disconnect end, which I slide a hose over and clamp.

soundcontrol · « **Reply #42 on:** November 01, 2015 - 05:10:19 AM »

OK, thanks Rob, that filter with the brake line connection/hose end looks like a good one to put near the tank. Don't think I have a lot of space on the firewall, since my harness is gonna go in right there, and lower would be a lot of heat from headers.

Author Topic: EFI fuel lines? (Read 12041 times)

crash340

Re: EFI fuel lines?

soundcontrol

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crash340

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ShelbyDogg

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crash340

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ShelbyDogg

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soundcontrol

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crash340

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ShelbyDogg

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soundcontrol

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soundcontrol

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ShelbyDogg

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soundcontrol

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