Converting a Weber carb into a TB - Ferrari Life
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post #1 of 26 Old 07-19-2011, 03:58 AM Thread Starter
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Converting a Weber carb into a TB

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I will keep tabs on him doing that. Many thanks for the advice there!
One more to keep tabs on is Hans. He claims he's ready to enter the 21st century and was thinking ITBs.....but I think I've got him talked into just gutting his webers and bolting shower injectors on top of them.

so...you might as well install a real ECU to do your ignition so you're ready when he starts posting things like "why did I spend all these years resisting EFI?" and "this thing runs SOOOO much better now"

On a performance engine there really is no comparison between EFI and carbs....I know you'll come around.
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post #2 of 26 Old 07-19-2011, 01:46 PM
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The Marelli shower injectors are indeed awesome. I don't believe am quite handy enough to fab the install on my own. Once they're installed, no prob I can handle everything easily enough though.
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post #3 of 26 Old 07-19-2011, 01:50 PM
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The setup is pretty basic like this right.
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post #4 of 26 Old 07-19-2011, 02:31 PM Thread Starter
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The Marelli shower injectors are indeed awesome. I don't believe am quite handy enough to fab the install on my own. Once they're installed, no prob I can handle everything easily enough though.
Tell Hans to make 2 then
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post #5 of 26 Old 07-19-2011, 02:32 PM Thread Starter
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The setup is pretty basic like this right.
Slick, where did you find it?
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post #6 of 26 Old 07-19-2011, 03:40 PM
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It was on another forum, can't recall which...... I just entered a few search parameters and this is what popped up
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post #7 of 26 Old 07-19-2011, 03:52 PM
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Mark, I was being retarded. Shower injector setups are way easier than I thought. So, a fuel rail, and a mounting bracket for each bank of webers.

Not a Ferrari or a car for that matter, but I certainly get the idea

http://www.youtube.com/watch?v=dGYST...eature=related
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post #8 of 26 Old 07-19-2011, 04:05 PM
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wow! Borla bought TWM. sorry for being too off-topic, but I thought it was interesting
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post #9 of 26 Old 07-20-2011, 03:37 AM Thread Starter
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Quote:
Originally Posted by ferraripilot View Post
Mark, I was being retarded. Shower injector setups are way easier than I thought. So, a fuel rail, and a mounting bracket for each bank of webers.

Not a Ferrari or a car for that matter, but I certainly get the idea

‪RSV FACTORY INIETTORI A DOCCIA BY IGINO!!!‬‏ - YouTube
Yes, it should be very easy which is why I keep trying to talk you into it .

The injectors I have (which look like the same ones in the video) have a groove for a retaining clip on the top so I'm thinking I'll set the rail up so it uses the groove to retain the injectors and nothing else is need.

Very cool video and it seems to idle/off idle just fine which is the one weakness of a shower set-up.....has me also most wondering way I'm even thinking about Hi/low injection on my engine.
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post #10 of 26 Old 07-20-2011, 04:04 AM Thread Starter
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wow! Borla bought TWM. sorry for being too off-topic, but I thought it was interesting
It is interesting.

They now have a lot of hi/low injection set-ups shown, when I last looked a year or so ago they had 1.

it also says they do custom....they are talking about the whole TB set-up but I'm sure they could fit injectors to your webers. Hell, I could make something for you while I'm set-up to make mine, it's exactly the same as I need but 2 cylinders shorter...I wonder where they get that injector rail, I've never seen that type.

Borla-TWM Induction - Throttle Bodies (423) 979-4045

You and Hans need to get together and start a project thread
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post #11 of 26 Old 07-20-2011, 05:59 AM
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That's interesting you posting that link as that is precisely the pic I was inspecting on their site. I don't recall them advertising such custom projects before.
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post #12 of 26 Old 07-20-2011, 06:36 AM
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My setup thus far. Tested it with coils and of course it provides one nasty zap. Mounting the 36-1 wheel was no prob.

As I am looking at the carb tops, I see the 4 studs on each carb as perfect mounting points for the injectors. That or a pair of aluminum legs holding the injector and welded to each carb trumpet and points straight down of course. That's probably easier......
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post #13 of 26 Old 07-20-2011, 06:55 AM
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Or of course Ducati's setups. The one uses the idea I had in mind which is to essentially attach/weld legs to a carb trumpet and mount the injector in the center. The other design has the injector pointing straight down but is attached to a different plate altogether.
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post #14 of 26 Old 07-20-2011, 07:19 AM Thread Starter
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Ducati rubber mounts their TBs, but uses a common linkage so they need a rigid connection between them…..the cast beam looking thing in the top pic or the stamped plate in the bottom pic.

I have a bunch of the black plastic stack/injector mounts that I’m probably not going to use but they are probably a bit big to fit to a weber….although a sleeve of some kind might do it. If you want a couple to look at let me know.

My current plan is to do something more like the TWM set-up. It’s less parts and easier to make I think
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post #15 of 26 Old 07-20-2011, 07:33 AM Thread Starter
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Mounting the 36-1 wheel was no prob.
What is that trigger wheel from?

it looks like you just machined away a bit of the damper to install it? Was that easier than just machining the tooth pattern directly into the damper?

You will get a bit of error because you're on rubber but I know lot of the 308 guys go this way and it works fine for them....I'm probably too OCD
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post #16 of 26 Old 07-20-2011, 07:42 AM Thread Starter
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Converting a Weber carb into a TB

This is a place holder for John and Hans who are both thinking of doing carb to EFI conversions and like the idea I gave them to gut their webers and bolt shower injectors on top
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post #17 of 26 Old 07-20-2011, 08:53 AM
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Yup. I should have done this other than pollute your excellent ecu thread lol. Moderator, if you would grab my posts and pics and shove them in here, that would be great.

The trigger wheel is from a Ford......escort or fiesta from the 90s (I think). Not worried about it being on rubber, should be fine and plenty accurate.
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post #18 of 26 Old 07-20-2011, 09:42 AM Thread Starter
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I just started the new thread because I didn't want all the cool stuff you were finding/doing to get lost/buried is all.
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post #19 of 26 Old 07-20-2011, 10:43 AM
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Quote:
Originally Posted by mk e View Post
One more to keep tabs on is Hans. He claims he's ready to enter the 21st century and was thinking ITBs.....but I think I've got him talked into just gutting his webers and bolting shower injectors on top of them.

so...you might as well install a real ECU to do your ignition so you're ready when he starts posting things like "why did I spend all these years resisting EFI?" and "this thing runs SOOOO much better now"

On a performance engine there really is no comparison between EFI and carbs....I know you'll come around.

I'm already running digital on the ignition Mark, so I've been with one foot in the 21st century for some time now...

(Got one of those Black Stallion ignition modules with distributor, for utter stealth look)

This is going to be a fun project! Need to finish the new Subaru engine on my airplane first (with EFI), and then this winter...
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post #20 of 26 Old 07-20-2011, 10:58 AM
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Interesting tigger wheel John! How much machining did you have to do to make it fit? I got a quote from Nick Scianna at NickForzaFerrari for

Wheel $ 249.00
Sensor bracket $49.00
Sensor $ 79.00

The Ford wheel will be a lot cheaper I'm sure!
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