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mach1mama
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So I am considering switching out my carburetor for a fuel injection system. I was wondering if anyone has done that.

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Yes and love it. It does take some work but starts easier and runs better. The Professional Products unit we used controls timing as well but I think we would go with the Holley or MSD next time. I think there are several on here that have made the swap

[button=http://www.7173mustangs.com/ezgallery.php?action=myimages&u=3961]My Mach[/button] [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=3961]Check out My Garage[/button]

 

 

 

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Yeah, I installed the MSD Atomic EFI that is also controlling timing. I can start the car and drive off without it hesitating even when the temps are in the 30's. I normally let it idle a few minutes before starting off though.

-john

(jbojo)

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

 

Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]

 

 

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Well I guess it is okay[WINKING FACE] But regarding this issue, I am still on to the karburator. Because of regulation of it here in Denmark. Which means that you have to keep it as originally as possible. You can only do 2 things with the car. Because of Veteran status. This means that you can't get it to a low cost price at in my case 670 x 2 Danish kroner. Which means I have true my insurance company right to drive from March 15- Oktober 30. But only drive it 6000 km a year. Which I will keep it in [WINKING FACE] Because if I would do too much to it. The price of my Mustang would drop. But I Like the idea of the those [WINKING FACE][THUMBS UP SIGN] Regards Lars

 

Sendt fra min E2303 med Tapatalk

So I'm a proud owner of one Mach 1 73! Regards Lars DK73:whistling:

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Yeah, I installed the MSD Atomic EFI that is also controlling timing. I can start the car and drive off without it hesitating even when the temps are in the 30's. I normally let it idle a few minutes before starting off though.

 

Does this upgrade make a differance to fuel consumption? Not looking to change my set up in my present car but would consider doing it to the next one.

Steve

1971 Grande

 

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Yeah, I installed the MSD Atomic EFI that is also controlling timing. I can start the car and drive off without it hesitating even when the temps are in the 30's. I normally let it idle a few minutes before starting off though.

 

Does this upgrade make a differance to fuel consumption? Not looking to change my set up in my present car but would consider doing it to the next one.

 

I made a lot of changes so hard to tell what made the difference but this is what I saw:

 

Original in 1973

351C 4V with headers only mod.

C6

3.25 non posi

Fuel avg 10/12 mpg

 

Today

351C with EFI, 10.5 : 1 compression and performance Cam, Blue Thunder Intake and headers.

C6 with Gear Vendors

3.89 posi rear

Fuel avg 14/18 mpg

 

This is in the first 1200 miles of driving since rebuild.

-john

(jbojo)

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

 

Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]

 

 

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jbojo, it's the GV that got you the gas milage. I went from 7mpg to 10mpg with the GV change.

 

A long time ago I put a holley analog projection on and it was okay. The newer systems are much more sophisticated.

 

Pegleg - Jbojo and I have similar setups. He has a bigger cam and 3.89 instead of 3.50 but otherwise pretty close except for the air/fuel system. He gets better gas milage than I do. He's probably spent more time fine tuning it since he drives it more. Of course, having three carbs on my car doesn't help.

'Mike'

73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

 

Pics of modifications included in: [button=http://www.7173mustangs.com/thread-1973-convertible--3335]My Garage[/button]

 

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I just can't see doing that to my 351C - might as well get a LSX and put in it.

Thanks

 

Tim

Tucson, Az

1973 SportsRoof

351C bored .040

Crank .020  and Stock cam

Flattop pistons

Edelbrock 4bbl CARB 800 CFM ELEC CHOKE

Edelbrock Performer 2750 Intake Manifold

 

NewPrimedHood_zpsw2jaj0cu.jpg

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I just can't see doing that to my 351C - might as well get a LSX and put in it.

 

The only thing I would have done differently would be to put the ignition box (6AL) and the Atomic controller in the glove box like I did with the GV controller. I may do this down the road.

IMG_0426.thumb.JPG.59e2c9cdd70ae3521e9e0cce1f36f013.JPG

-john

(jbojo)

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

 

Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]

 

 

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jbojo, it's the GV that got you the gas milage. I went from 7mpg to 10mpg with the GV change.

 

A long time ago I put a holley analog projection on and it was okay. The newer systems are much more sophisticated.

 

Pegleg - Jbojo and I have similar setups. He has a bigger cam and 3.89 instead of 3.50 but otherwise pretty close except for the air/fuel system. He gets better gas milage than I do. He's probably spent more time fine tuning it since he drives it more. Of course, having three carbs on my car doesn't help.

 

Damn!!!! 7-10mpg Thats unreal when you consider what modern soulless cars get mpg. Still, i would rather have a Mustang with soul & character

Steve

1971 Grande

 

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jbojo, it's the GV that got you the gas milage. I went from 7mpg to 10mpg with the GV change.

 

A long time ago I put a holley analog projection on and it was okay. The newer systems are much more sophisticated.

 

Pegleg - Jbojo and I have similar setups. He has a bigger cam and 3.89 instead of 3.50 but otherwise pretty close except for the air/fuel system. He gets better gas milage than I do. He's probably spent more time fine tuning it since he drives it more. Of course, having three carbs on my car doesn't help.

 

Damn!!!! 7-10mpg Thats unreal when you consider what modern soulless cars get mpg. Still, i would rather have a Mustang with soul & character

 

Haha, yeah. The 'lower' rear endgearing will kill gas milage. The GV overdrive really helped but probably won't pay for itself in saved fuel since I don't drive it more than a couple thousand miles a year (if that). But the OD also really makes it more pleasureable to drive, especially on the highways.

 

The tripower doesn't help either. I am actually 'over carbureted' and I haven't had the time to tune it. I could probably squeeze another mile or two out of it.

 

DSC05464_zps66b9b53d.jpg

 

 

If I went fuel injection I would have to make it sexy. Something like this:

 

Ford-351-Cleveland-V8-Stack-Injection-Kit_3495.jpg

 

or this

 

crossram3.jpg

'Mike'

73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

 

Pics of modifications included in: [button=http://www.7173mustangs.com/thread-1973-convertible--3335]My Garage[/button]

 

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I just can't see doing that to my 351C - might as well get a LSX and put in it.

 

The only thing I would have done differently would be to put the ignition box (6AL) and the Atomic controller in the glove box like I did with the GV controller. I may do this down the road.

 

Well...it does look pretty!!!!!::thumb::

Thanks

 

Tim

Tucson, Az

1973 SportsRoof

351C bored .040

Crank .020  and Stock cam

Flattop pistons

Edelbrock 4bbl CARB 800 CFM ELEC CHOKE

Edelbrock Performer 2750 Intake Manifold

 

NewPrimedHood_zpsw2jaj0cu.jpg

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I made a lot of changes so hard to tell what made the difference but this is what I saw:

 

Original in 1973

351C 4V with headers only mod.

C6

3.25 non posi

Fuel avg 10/12 mpg

 

Today

351C with EFI, 10.5 : 1 compression and performance Cam, Blue Thunder Intake and headers.

C6 with Gear Vendors

3.89 posi rear

Fuel avg 14/18 mpg

 

This is in the first 1200 miles of driving since rebuild.

 

What duration is your cam, if you don't mind my asking? It seems that some systems are better equipped to handle long duration/higher overlap cams than others. On the ranchero forum, one guy was unable to get the FiTech system to work with his ~290/300 deg cam.... I gathered it wasn't able to correctly set the a/f ratio at low speed due to the unburned fuel resulting from a lot of overlap/duration in the cam.

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Will-e/Tim,

 

Being that both of you are in AZ, do either of you have problems with your carbs hot soaking and flooding out in the summer heat?

 

I don't drive it a lot in the summer now but I never had this problem back when it was my daily driver. At the time I was running a 3310 holley and then a projection unit.

'Mike'

73 Convertible - 351C/4V CC heads/4bolt/forged flat tops/comp 270/rhodes/mallory unilite/tri-power/hookers/glasspacks/c6/3.50 limited slip/Gear Vendors/Global West sub frames, strut rods and shelby style traction bars/ Rear sway bar/tilt steering (not original)

 

Pics of modifications included in: [button=http://www.7173mustangs.com/thread-1973-convertible--3335]My Garage[/button]

 

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I'm with Mike, I haven't had that issue either.

 

Tim

Thanks

 

Tim

Tucson, Az

1973 SportsRoof

351C bored .040

Crank .020  and Stock cam

Flattop pistons

Edelbrock 4bbl CARB 800 CFM ELEC CHOKE

Edelbrock Performer 2750 Intake Manifold

 

NewPrimedHood_zpsw2jaj0cu.jpg

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My Fitech unit should be here in the next week or two and then I can give you some insight. I've heard nothing but good things about it though. I'm running a 429, 5 speed and 3.25 gears at the moment which is netting me 21-22 mpgs on the highway. Practically every review I've seen on the Fitech has gained another 2 to 4 mpg for the owner so I expect the same. Of course when I drop in the 521, who knows what will happen lol.

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I made a lot of changes so hard to tell what made the difference but this is what I saw:

 

Original in 1973

351C 4V with headers only mod.

C6

3.25 non posi

Fuel avg 10/12 mpg

 

Today

351C with EFI, 10.5 : 1 compression and performance Cam, Blue Thunder Intake and headers.

C6 with Gear Vendors

3.89 posi rear

Fuel avg 14/18 mpg

 

This is in the first 1200 miles of driving since rebuild.

 

What duration is your cam, if you don't mind my asking? It seems that some systems are better equipped to handle long duration/higher overlap cams than others. On the ranchero forum, one guy was unable to get the FiTech system to work with his ~290/300 deg cam.... I gathered it wasn't able to correctly set the a/f ratio at low speed due to the unburned fuel resulting from a lot of overlap/duration in the cam.

 

RPM Range: 2500-6800

 

Advertised Duration: 290/290

 

Duration @ .050: 225/235

 

Lift: .530/.550

 

Lobe Center: 110

 

MSD EFI does not like durations greater than 250* @ .050, probably the same for FiTech.

-john

(jbojo)

351C 4V cc heads, 10.5 : 1 CR, 290 Herbert cam, Flat top forged pistons, forged connecting rods, Atomic efi,

C6 with Gear Vendor overdrive, 3.89 Tru Trac, Hooker Super Comp with 2 1/2" Pypes Exhaust.        

 

Some Mod pictures can be seen at: [button=http://www.7173mustangs.com/forum-garage?filterxt_uid=2026]Bojo's Garage[/button]

 

 

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My Fitech unit should be here in the next week or two and then I can give you some insight. I've heard nothing but good things about it though. I'm running a 429, 5 speed and 3.25 gears at the moment which is netting me 21-22 mpgs on the highway. Practically every review I've seen on the Fitech has gained another 2 to 4 mpg for the owner so I expect the same. Of course when I drop in the 521, who knows what will happen lol.

 

The FITECH unit is the one I am the most interested in. You will have to let me know how the installation goes. Did you choose to change your fuel pump as well, or are you going to use the adapter that goes in engine campartment?

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I'm going to run a Walboro in-tank unit. I need a new tank anyway and this was the excuse I needed to go ahead and replace it. I thought about using their "fuel command center" that mounts under the hood so you can use your existing mechanical fuel pump, but it's already cluttered under there as it is. I'll also be using the Fitech to control my timing and bought the 1200hp version.

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jbojo, it's the GV that got you the gas milage. I went from 7mpg to 10mpg with the GV change.

 

A long time ago I put a holley analog projection on and it was okay. The newer systems are much more sophisticated.

 

Pegleg - Jbojo and I have similar setups. He has a bigger cam and 3.89 instead of 3.50 but otherwise pretty close except for the air/fuel system. He gets better gas milage than I do. He's probably spent more time fine tuning it since he drives it more. Of course, having three carbs on my car doesn't help.

 

Damn!!!! 7-10mpg Thats unreal when you consider what modern soulless cars get mpg. Still, i would rather have a Mustang with soul & character

 

Haha, yeah. The 'lower' rear endgearing will kill gas milage. The GV overdrive really helped but probably won't pay for itself in saved fuel since I don't drive it more than a couple thousand miles a year (if that). But the OD also really makes it more pleasureable to drive, especially on the highways.

 

The tripower doesn't help either. I am actually 'over carbureted' and I haven't had the time to tune it. I could probably squeeze another mile or two out of it.

 

DSC05464_zps66b9b53d.jpg

 

 

If I went fuel injection I would have to make it sexy. Something like this:

 

Ford-351-Cleveland-V8-Stack-Injection-Kit_3495.jpg

 

or this

 

crossram3.jpg

 

 

If this isn't car porn I don't know what is!

 

 

Sent from my iPhone using Tapatalk

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jbojo, it's the GV that got you the gas milage. I went from 7mpg to 10mpg with the GV change.

 

A long time ago I put a holley analog projection on and it was okay. The newer systems are much more sophisticated.

 

Pegleg - Jbojo and I have similar setups. He has a bigger cam and 3.89 instead of 3.50 but otherwise pretty close except for the air/fuel system. He gets better gas milage than I do. He's probably spent more time fine tuning it since he drives it more. Of course, having three carbs on my car doesn't help.

 

Damn!!!! 7-10mpg Thats unreal when you consider what modern soulless cars get mpg. Still, i would rather have a Mustang with soul & character

 

Haha, yeah. The 'lower' rear endgearing will kill gas milage. The GV overdrive really helped but probably won't pay for itself in saved fuel since I don't drive it more than a couple thousand miles a year (if that). But the OD also really makes it more pleasureable to drive, especially on the highways.

 

The tripower doesn't help either. I am actually 'over carbureted' and I haven't had the time to tune it. I could probably squeeze another mile or two out of it.

 

DSC05464_zps66b9b53d.jpg

 

 

If I went fuel injection I would have to make it sexy. Something like this:

 

Ford-351-Cleveland-V8-Stack-Injection-Kit_3495.jpg

 

or this

 

crossram3.jpg

 

Well, If you going restomod That fuel injection is very sexy. If i were going down that route, which i'm not, i would definately fit that sexy shapely Fuel Injection and run around with no hood :coolphotos: :bravo:

Steve

1971 Grande

 

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I'm with Mike, I haven't had that issue either.

 

Tim

 

Thanks for the input, guys. I've had that issue in the past. The predator carb was a guarantee to heat soak and flood and the 3310 would do it on occasion too. Ceramic coating on the headers probably would have helped a lot. A 1" phenolic spacer would probably have done wonders for it as well.

 

My intent is to completely eliminate the above issue via EFI.

 

RPM Range: 2500-6800

 

Advertised Duration: 290/290

 

Duration @ .050: 225/235

 

Lift: .530/.550

 

Lobe Center: 110

 

MSD EFI does not like durations greater than 250* @ .050, probably the same for FiTech.

 

Good to know the MSD handles it OK. I went back and looked at the ranchero thread again....this guy's cam is 290/300 advertised and 232/242@.050 with a 106* LSA (83* of overlap). Yours comes out to 70*.

 

One more question...this in reference to FiTech's explanation given to the guy on ranchero forum, do you have a single or dual plane intake? FiTech claims his single plane intake is responsible for the unburned hydro-carbons making it to the O2 sensor. I've read that EFI systems like wide LSA's...but I think that applies to the port injected EFI using the long, torque efficient intake designs. I think that came about from guys putting a narrow LSA cam in an engine using long intake runner EFI and getting poor low end response. If you mismatch a carbed engine this way, you'll still get poor low end response.

 

Here's the post (#152) if anyone wants to read: http://www.ranchero.us/forum/index.php?threads/1967-500-buster-main-restoration-thread.3688/page-8

 

I'm going to run a Walboro in-tank unit. I need a new tank anyway and this was the excuse I needed to go ahead and replace it. I thought about using their "fuel command center" that mounts under the hood so you can use your existing mechanical fuel pump, but it's already cluttered under there as it is. I'll also be using the Fitech to control my timing and bought the 1200hp version.

 

I'm also very interested in the FiTech unit. I think TonyMuscle is also going to install this system on his stang. I look forward to reading about the install & results from you guys.

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I've read that EFI systems like wide LSA's...but I think that applies to the port injected EFI using the long, torque efficient intake designs. I think that came about from guys putting a narrow LSA cam in an engine using long intake runner EFI and getting poor low end response. If you mismatch a carbed engine this way, you'll still get poor low end response.

 

 

Your comment about long runners and poor response reminded me of these things:

370835162_crossramintake.jpg.351ecbfa38cd18a72f3552d589784038.jpg

 

 

“If you can't explain it simply, you don't understand it well enough.”

--Albert Einstein

 

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