switch to injection

[Buzzmobile]

Hey Keith,

I was thinking about switching my TP manifold and twin 4 barrels to a stack injection. I have original "high performance" heads...what ever that means. Can you give me an idea of what is involved? I have a pic of the engine in the gallery and you did the build...not sure if you remember it. Can you use the same heads with a different manifold or is that a new set of heads as well as manifold/injection set up? How much is involved with the computer part of it? I am not the best carb mechanic on the planet and honestly would like to not have to worry about tuning this thing all the time. Would you be interested in a parts trade?


Buzz

[Murphy]

Keith built a fantastic motor for me with the Mass Flo Fuel Injection system and it works great, no tuning or adjustments needed. That's why I picked it, the computer does the work. PS, Chris at Mass Flo is a superstar when it comes to customer support.

[Buzzmobile]

that is good to know! thanks
Buzz

[bobcowan]

You can bolt it on to any set of heads, doesn't matter.

You'll have to find a place to mount the computer inside the passenger compartment or the trunk. You can't put it in the engine bay.

Some computers have a wide band O2 sensor for closed loop operation; and that's a good thing. But some only use a narrow band - don't buy one of those.

You need a lot more fuel pressure than a carb, like 40-45 psi. You'll also need a return line. This part is probably the most work.

Programming the computer can be a real pain in the neck. It has a lot more adjustability than a carb, and it's much more precise. Therefore, it's a lot easier to get lost during the tune. Whoever you buy it from, make sure they have a good reputation for customer service - like www.verycoolparts.com or Gordon Levy.

You need to invest in a wide band O2 sensor (like the LM-1), and learn how to use it. You'll get lost without it.

[Buzzmobile]

well, I guess what I was asking, is there a manifold that fits my heads?

[bobcowan]

Yes, there is one available for you. This comes from www.verycoolparts.com

[pmfranke]

Bob ,does the edelbrock system have a wide band o2 sensor?

[Ken Oikawa]

Originally Posted by Buzzmobile

Hey Keith,

I was thinking about switching my TP manifold and twin 4 barrels to a stack injection. I have original "high performance" heads...what ever that means. Can you give me an idea of what is involved? I have a pic of the engine in the gallery and you did the build...not sure if you remember it. Can you use the same heads with a different manifold or is that a new set of heads as well as manifold/injection set up? How much is involved with the computer part of it? I am not the best carb mechanic on the planet and honestly would like to not have to worry about tuning this thing all the time. Would you be interested in a parts trade?


Buzz

If you're using TP heads, you'll need TP intake with stack injections which you'll have to fabricate. There is none available for TP heads. I used TP intake with mechanical Hilborn FI which I then converted to EFI. I have not installed this system yet, but plan on it in the future.

[Buzzmobile]

that is what I was afraid of...no intake for TP.

Buzz

[bobcowan]

No, the edelbrock system uses a narrow band sensor.

What am I missing? You have an FE motor with "original performance heads". Exactly what kind of heads to do have?

[Buzzmobile]

tunnel port....keith craft called them some type of specific high performance heads and said it had been a long time since he had seen a set of them...? picks in the gallery

[bobcowan]

I see. The tunnel ports are predominantly a race part. A huge almost round port with a big obstruction in the middle. I doubt you'll ever find a weber styl manifold to fit that.

However, I do recall seeing an adapter that allowed the use of a side draft or pair of side draft carbs on a standard 4 barrel manifold. Hood clearance could be an issue, though.

[Rwillia4]

I would call TWM Induction (http://www.twminduction.com/v8_kits/v8_kits-FR.html) they have kits that are not listed on the web site and have been very helpful. I selected a TWM for two reasons: not a carb (ease of maintance), has the most similar look to webers (fuel rails on the inside). I am happy with the product, the machine work is incredible. This is the same setup that Roush is using for his FI engines. The one thing I don't like about it is the limited air cleaners offered.

For electronics I decided to go with FAST because of the capabilities it offered.

[Keithc8]

Buzz the problem with the Tunnel Port heads would to be finding an intake. If we could come up with a single four intake I could weld the bungs into it for the fuel injectors. The Edelbrock Victor EFI comes with the bungs already in the intake and works with most of the other FE heads. There are a couple of ways to go but the least expensive and I believe the less hassle would be the Mass Flow system. I do not have a good place to go with your intake since it fits the Tunnel port heads. Your best bet is to sell the heads, intake and carbs as a package and go to the Edelbrock heads. Maybe we can talk at Tulsa Shelby show if you make it. Thanks, Keith Craft

[Suomien]

Wouldn't the pushrod tubes running through the intake ports be an issue with port injection? First, you'd have to mount the injectors farther away, up the runner. Second, the injector would be pointed right at the pushrod tube. Pointed otherwise would send the fuel against one side wall or the other trying to avoid hitting the tubes.