Re: Pace performance fitech fuel injection
 

You will need to:
-Provide the unit 12v+ constant power, I wired it to the alternator.

-Provide the unit 12v+ switched ignition power, I used the electronic choke wire from my aftermarket EZ wiring harness.

- Install the temp sensor in the head or intake manifold, I used the 3/8npt port in the front of my edlebrock intake manifold because I could not get the plug out of my vortec head and didnt want the wire near my headers.

-Drill a hole 2-4 inches from your exhaust manifold collector for the o2 sensor bung plate which either gets clamped with hose clamps or welded. I used clamps because plan on getting new exhaust in the future.

- Install either the $395 FiTech Fuel Command Center(no fuel return required) or $245 Inline Fuel Pump Kit(return line required) and supply it 12V+ power from the EFI harness.

-Hook up you transmission kick down cable. The FiTech throttle bracket is just like a Holley so it is definatly compatible with you TH350. You may need a bracket or lever depending on your current setup but it is definatly an option.

-Optional: Drive like a complete jerk and smoke tires all over the place with a ear to ear smile.

Re: Pace performance fitech fuel injection
 

I've been reading about this non stop since yesterday now and am pretty sure I'm going to pull the trigger on the 600hp power adder version ($1,200) plus the Fuel Command Center ($400).

My truck is basically stock (350) with a 650 edelbrock carb that is definitely out of tune.

The pros for me seem to be:
- Flexible to use with basically any future engine swap.
- Easy to setup. Subtle looking.
- The Fuel Command Center lets me keep my in-cab fuel tank, and will pressure up the fuel coming from the mechanical pump to the EFI unit. I like the fact that the Fuel Command Center will keep the built in electric fuel pump cooler (submersed) and will be quieter then an in-line electric pump which I believe would also require a return line. Although it looks like most ppl install the Fuel Command Center in the engine bay, I may look at putting it out of sight attached to the frame somewhere, and running an extended fuel line into the EFI unit. We'll see.
- Save time and money not needing to get the carb tuned.
- Fuel economy increase. I read a fellow with a C3 Corvette increased from 200miles per tank to 300 miles per tank!
- Adding the included 02 Sensor into the stock exhaust will be easy with something like this: Amazon.com: AEM 30-2355-250 2.5" No-Weld O2...

I'll be calling them before ordering to make sure I have everything I'll need for parts to complete the install.

Here's a few more links:
C10 member installing and reviewing it here (square body).
http://67-72chevytrucks.com/vboard/s...fitech&page=16

Here’s a C3 Vette install.
http://www.corvetteforum.com/forums/...fi-review.html

And a built LS7. Carb vs this kit
http://forums.maxperformanceinc.com/...ghlight=Fitech

Re: Pace performance fitech fuel injection
 

Ekliptix,
The kit comes with everything you need to install the o2 sensor and it is very simple to install. Like mentioned it can be clamped or welded to the exhaust. The instructions state not to install the o2 sensor before connecting it to the functioning EFI harness because it can damage the sensor. So if you want it welded and can't weld it at home you should clamp it and then take it to a shop to be welded. Mine is completly sealed with the clamps.

Absolutly everything you need is included except for whatever bracket you may need to connect your transmission & throttle cable.

Re: Pace performance fitech fuel injection
 

Merry Christmas to me! I just pulled the trigger on the black basic with the command center. Jegs had the soonest ship out date at 12/30/15. I truly doubt it ships out then because fitech told me they would have some in stock around 1/15/15 but we will see.

Re: Pace performance fitech fuel injection
 

has anyone used the command center with the stock tank? I have a 72 tank with the passenger side vent on it that runs with the feed line up the passenger side frame. Heres my concern! the vent off my tank is just unhooked on my frame, no charcoal canister. I am afraid if I connect the vent from the command center to it my tank will no longer have an over pressure vent. The gas cap lets air in but not out. Meaning if the truck sits in the sun my tank may expand. From my research there is no such thing as a two way vented fuel cap for a 72 tank. Fitech says NOT to vent the command center under the hood but hell thats the way my truck has been for years. Whats the issue if I just put a T in the tank vent line and still leave it vented by the frame under the hood? I can see this being an issue if the command center puts out a ton of fumes but I dont know if it does yet.

Anyone ran into this issue yet or know of a 72 locking tank cap that vents both ways but wont spill fuel out in a hard right hand turn?

Re: Pace performance fitech fuel injection
 

I've been researching these for a while, and have been talking to FITech a little.

I want to use the Command Center fuel pump setup so I can keep my in-cab tank and not worry about burning up fuel pumps. The only thing I can't figure out what to do with is the vent on the Command Center. Its supposed to be vented back to the tank. My truck is a 1970, so no vent exists. I don't see an easy way to add one without welding on the tank, which just isn't going to happen since it has had fuel in it. FITech was no help with this, they actually gave me a smartass reply about "Remove the BOMB and put a tank under the bed".

Anybody have any good ideas on what to do with that vent?

Re: Pace performance fitech fuel injection
 

Above the filler neck on your truck should be a hose inside the cab T into it here. This should not be a problem with your truck as LONG as you have the correct 2 way vented fuel cap. You can still get them for a 67-71 tank because the filler neck is smaller.

This is where I am having an issue, I cant find a two way vented gas cap for a 72 that has ever existed.

have you ever open your cap and it had pressure or spewed fuel back upon an open? If so your cap is not two way vented or its faulty.

Re: Pace performance fitech fuel injection
 

The vent didn't exist until 1971. 70 and earlier don't have anything there. Its just a filler neck.

Re: Pace performance fitech fuel injection
 

No, I usually have a very slight vacuum. Mine is a correct aftermarket vented cap for 1970 and earlier trucks. I had to modify the seal quite a bit to get it not to leak gas on corners, but now it works well.

Re: Pace performance fitech fuel injection
 

My tank looks like item 1 in this diagram: http://www.lmctruck.com/icatalog/cb/full.aspx?Page=54


The tank is only 2 years old and I don't want to mess around replacing it.

Re: Pace performance fitech fuel injection
 

Can't you swap in a sending unit from a 72 auto truck that has an extra port?

Re: Pace performance fitech fuel injection
 

Pull the filler neck out. Brass or weld a 3/8 nipple in it. Make sure your fuel cap is a two way and release pressure. Thats the only thing that I would know to do short of leaving it vented under the truck. we are in the same boat with different setups..

I am going to make mine work I am just not sure how yet, I think my first attempt will be to T my original vent line to the command center vent and leave one side open under the hood. If I never smell gas guess what its going to stay like!!!!! If it does produce more vapors than the factory vent line under the truck I will back up and punt. My dilemma is if I run another line back to the tank and leave the original vent line and it does pressurize my tank it will push even worse vapors from the 25 gallon tank under the hood through the original vent line than the command center vent would alone.

Re: Pace performance fitech fuel injection
 

Good point nitis in his case as long as he has a two way vented fuel cap. in my case i already have that line, its just on the passenger side of the tank. If I do put in a 2 port sending unit and plumb my vent back to it wouldnt it just push more vapors back under the hood through my original vapor vent? Dang it why didn't the make a two way vented cap for a 72. Thats all I need then I could just hook it to my original vent line

Re: Pace performance fitech fuel injection
 

Well I'm not sure about everything but sit back and stew for second. Were all 72 caps the same? Only autos had dual ports. And did auto 4x4 have dual ports? Is there a simple break down of all the differences between fuel tanks between 67-72. I was only aware of the one sending unit.

Re: Pace performance fitech fuel injection
 

72 gained the passenger side vent that ran to the charcoal canister and the filler neck extra tube. My 72 tank has a single inlet on the sender but its a manual. 72 is also when the cap size changed and the fuel cap got smaller and only vented in. No longer venting out to the atmosphere

Re: Pace performance fitech fuel injection
 

Filler neck is one piece with the tank.

Re: Pace performance fitech fuel injection
 

I thought about that but the return line in the sender would be below the fuel level when the tank is full. I don't know if that would be ok or not. FITech sounded like they didn't approve of that.

I could drill my existing sender and put in a bulkhead fitting if that would work.

I just don't know if that is adequate or not.

Re: Pace performance fitech fuel injection
 

Well damn I am striking out all over the place. Sounds like if you want it back to the tank you gotta pull the tank either way to weld a nipple in, make sure cap is vented both ways still!!! or run it under the truck which they advise against.

Re: Pace performance fitech fuel injection
 

I don't want it under the truck, it could puke fuel and cause a fire. I wouldn't dare weld on a used tank without a nitrogen purge, and I don't have the setup for that.

Re: Pace performance fitech fuel injection
 

Piss on it I am going to install mine as a closed loop and see what it does, as long as the command center doesnt build pressure mine will be perfect. Meaning run the command center vent to my original tank vent with the factory only vent in cap! I will keep yall posted lol. If you don't hear back from me the results were not in my favor

Re: Pace performance fitech fuel injection
 

fitech said it has a check ball valve in it to prevent rollover flow of puke back when I spoke to them on the phone the other day.

Re: Pace performance fitech fuel injection
 

Where are you putting the command center?

Re: Pace performance fitech fuel injection
 

I'm struggling with a visual at the moment but couldn't you turn it upwards or something? Maybe I'm reaching

Re: Pace performance fitech fuel injection
 

They told me the concern with the vent was if the float ever hung up you could have flow out of the vent. So vent under the truck (or anywhere other than the tank) could spray fuel if something fails.

I went back and forth with them for quite a while on Facebook the other day on this stuff.

What I really need is a fitting I can add to the filler neck without causing sparks or heat.

Re: Pace performance fitech fuel injection
 

I don't know.


When the tank is full, I have fuel up into the bottom of the file neck, maybe by 2". The return on the sender would then be 3-4" below the fuel level. Even with a tube turned up its still 2" below the fuel level.

I could put a check valve in the vent line to keep fuel from flowing back down the vent, but any venting would have to bubble through the fuel while the tank is full.

I just don't have enough faith that it would work to invest $1200 and have it fail.

Re: Pace performance fitech fuel injection
 

Aaaaahhhhhh. They told me there was no way fuel could come out of it. Only vapors. But I see your point clearly👀

Re: Pace performance fitech fuel injection
 

1390 to be exact. It will work.

I am going to locate mine on the drivers side radiator support. And use a drivers side inlet port on the throttle body.

Re: Pace performance fitech fuel injection
 

Are you going in front of the engine with the line from the mechanical pump?


Love to see pics once you do it.

Re: Pace performance fitech fuel injection
 

I am going in front of it right under the radiator. There is a low spot on the support that has factory holes I will use to fasten too.

Re: Pace performance fitech fuel injection
 

Gotcha

Re: Pace performance fitech fuel injection
 

Guys,
My buddy Diceman, built a surge tank that functions just like the command center. We mounted it behind the right headlight and battery. Here's a link to my build thread which starting in post #10 you'll get a pretty good idea on what we did. We probably would have use the FiTech Command center had it been available at the time. Anyway, the one Diceman built works great and we've now run it over 7000 miles with no issues. I will be using all FiTech on my Camaro.

http://67-72chevytrucks.com/vboard/s...d.php?t=603726

:gmc2:

Re: Pace performance fitech fuel injection
 

I just spent 30 minutes staring at my tank wondering what to do with that damn vent line. I just don't see a way to add it to the filler neck at all.

I was looking at bulkhead fittings for fuel cells, but I think that will protrude too far into the neck and make filling a pain. And drilling the hole is kind of scary. I'd have to pull the tank, drain it, and let it air out for a while. Even then......those fumes hang around for a long time.

Re: Pace performance fitech fuel injection
 

Pull it fill it with water and drill a hole on top. Look at a 72 tank for reference on the passenger side. I cut propane tanks every week. Fill it with water and you will be fine.

Re: Pace performance fitech fuel injection
 

That worries me because then I have to get all the water back out or the truck will run like $hit.

Starting to seem like way more than I really want to bite off for a truck that runs just fine already.

Re: Pace performance fitech fuel injection
 

Pour it out and sit it in the sun for a day. It will evaporate quick. Just pour it out the filler neck.

Re: Pace performance fitech fuel injection
 

You fellas know about the fuel lines being different diameters don't you? The 6 cylinder has a 5/16" single line only and a later V8 has a 3/8" feed line and a 1/4" return line from the sending unit to the fuel pump. And as far as I know each sending unit will fit in either eec tank or non eec tank. Just an FYI when planning your fuel system.

Re: Pace performance fitech fuel injection
 

Yup.

My truck was originally a 6-cylinder, but everything has been replaced. i did custom fuel lines tank to carb, new tank, and new sending unit.

I agree, sending units all fit any of the tanks. You can use the one with a return pretty easily to add a return to the in cab tank. You can get sending units with 5/16 or 3/8, and 3/8 ones with or without returns. The sending unit that was in my truck when I got it was 3/8 and had a capped off return. When it died I replaced it with a 3/8 without the return. That was after I had replaced the tank.

If I had known then what I know now I would have bought an EEC tank and made all of this easier.

Re: Pace performance fitech fuel injection
 

With the cost of other brand units, I figured I'd wait until my carb started giving me issues, but for this price I might just bite now.
Although, I may just wait and see about the new 400hp unit.

Re: Pace performance fitech fuel injection
 

Ok guys I just ran a test. I hooked my return line up to my shop air and put 10 psi of pressure to it and as it was filling the tank I heard it start hissing. So I crimped the hose off to hold pressure to find the hiss. Sure enough my one way vented cap will also vent high pressure out. Needless to say it takes a good amount of volume and pressure but it will vent. This is good news to me for not having to do another vent line. Another good thing is if it builds that much pressure I will surely hear it. I am going to run the command center vent to my factory tank passenger side vent that's already under the hood and run it as a vent IN only system and only out if it exceeds over 5 psi. I feel like it will be good

Re: Pace performance fitech fuel injection
 

Let us know how it works out!