Tired of Carbs want injection, Have 74 1.8L dual webber going to injection Options

[ausDan]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

[saigon71]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

The only compatibility issues would be if a non FI camshaft was installed for those carbs. Any idea what camshaft is in your engine?

Stock FI is an excellent system for a stockish car. It may take some time to sort it out, but it's worth the effort in my opinion.

[ClayPerrine]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

I can help and I am in the DFW area. We are doing one for Rob-o in the near future, and you are welcome to join us.

[SirAndy]

Stock FI is an excellent system for a stockish car. It may take some time to sort it out, but it's worth the effort in my opinion.

(IMG:style_emoticons/default/agree.gif)

[tomrev]

Of course, the fuel pump will need to be changed to the high pre. injection pump; perhaps you have that with all the F.I. bits.

[ClayPerrine]

Of course, the fuel pump will need to be changed to the high pre. injection pump; perhaps you have that with all the F.I. bits.

Or just go to FLAPS and purchase an Airtex E8445 or equivalent. New pump for about 110.00, and it makes the same pressure and volume as the 350.00 stock pump.

[RohJay]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

Few months ago, I reverted to original L-jet FI on my '75 weber carbed engine: no regrets watsoever. You should not have any issues fitting a '75 J-Jet system on a '74, as long as ALL components are from a working '75 system. If the '75 has smog unit, you can very well ditch that AFAIK.

Plenty of resources here to guide you : http://bowlsby.net/914/Classic/TechNotebook.htm.

Also this post I made while I was trying to figure my way, might be of use:

http://www.914world.com/bbs2/index.php?sho...=260942&hl=

Good luck

[cgnj]

Ljet should be able to handle common carb cams. Measures the air going in, so no vacum signature issues.

[jcd914]

It does not take much cam to causes too much pulsation in the intake air flow and the air flow meter can't handle it.

jim

[saigon71]

Of course, the fuel pump will need to be changed to the high pre. injection pump; perhaps you have that with all the F.I. bits.

Or just go to FLAPS and purchase an Airtex E8445 or equivalent. New pump for about 110.00, and it makes the same pressure and volume as the 350.00 stock pump.

(IMG:style_emoticons/default/agree.gif)

+1 on the Airtex pump if you need a high pressure pump. Great unit!

[ausDan]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

I can help and I am in the DFW area. We are doing one for Rob-o in the near future, and you are welcome to join us.

Thanks for the response, I am interested in building some knowledge before jumping into it. Great to find someone close by - even at 200 miles. I am still trying to decide how to configure the car. I think I also have some issues with valves as they are noisy. My thought is to rebuild and ditch the carberators for FI. Once the engine is warmed up it runs pretty well and seems like it doesn't burn oil.

[ausDan]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

The only compatibility issues would be if a non FI camshaft was installed for those carbs. Any idea what camshaft is in your engine?

Stock FI is an excellent system for a stockish car. It may take some time to sort it out, but it's worth the effort in my opinion.

I don't know, but it feels as though it has a non-stock cam. As I go though it, I want to return it to stock. I think it has some ticking noise coming from the heads I suspect valve wear. I am getting some excellent as well as reassuring posts to this.

[r_towle]

A camshaft designed for carbs would have more overlap then a stock camshaft.
This creates flutter inside the plenum which can make the air fuel meter flapper door flutter and give you issues.

But, my thoughts
A) most people never change the camshafts, they just flipped to carbs
B) you can get away with a street camshaft for carbs, there are stronger springs if needed ( a rebuilder can help you, Google 944 afm)
C) you won't know till you try, and take the offer of local help, it will save you months of troubleshooting

[ngk007]

I bought a 74 1.8L that has dual Webbers, and it is really a pain starting it in cool weather, and it backfires after releasing the accelerator. I recently bought a "complete fuel injection taken from a running 1975 1.8", and I am interested in knowing if I will have compatibility issues. My desire is to return this car to its stock configuration as a casual driver.

Hi All,
I too am tired of Carb life on my '75 914 2.0 and am looking for a complete Fuel Injection kit, when I purchased my car a year ago, it came with Dellorto carbs and I do not have any of the stock injection parts including electronics. Anyone out there have a full system for sale or from a donor car?

[Bob L.]

First off... (IMG:style_emoticons/default/welcome.png)

There is a small but growing number of us in Austin. We have not gotten together yet
but I think we are interested in doing so.

I don't know much about L-jet but I can still help out.
Where in Austin are you? I am near the Arboretum, others in Georgetown and Pflugerville. LETS GET IT ON!

[ClayPerrine]

Betty and I will be in Austin for the PCA club race at COTA. We will be in her 914. How about we arrange a dinner for then?

[ausDan]

First off... (IMG:style_emoticons/default/welcome.png)

There is a small but growing number of us in Austin. We have not gotten together yet
but I think we are interested in doing so.

I don't know much about L-jet but I can still help out.
Where in Austin are you? I am near the Arboretum, others in Georgetown and Pflugerville. LETS GET IT ON!

Near Manchaca Road - would like to trade numbers/email.

[ausDan]

Betty and I will be in Austin for the PCA club race at COTA. We will be in her 914. How about we arrange a dinner for then?

Great, I would like to see if you think the box of L-Jet looks workable. When I bought it they said it came straight from a running car, and the parts are well sealed in plastic bags. Then I took an exploded diagram, and used that to see if anything was missing - I think it's about as complete as I expect. Who knows, I usually have to shop around for something. I am not a well trained mechanic - much less air cooled flat H-4. I have rebuilt one engine, and that was a Ford V6 SOHC (took a few months and a lot of advice and frustration) which at 40K miles still runs. Now I am interested in these air cooled engines.
We could meet when you are in town.

[ClayPerrine]

Betty and I will be in Austin for the PCA club race at COTA. We will be in her 914. How about we arrange a dinner for then?

Great, I would like to see if you think the box of L-Jet looks workable. When I bought it they said it came straight from a running car, and the parts are well sealed in plastic bags. Then I took an exploded diagram, and used that to see if anything was missing - I think it's about as complete as I expect. Who knows, I usually have to shop around for something. I am not a well trained mechanic - much less air cooled flat H-4. I have rebuilt one engine, and that was a Ford V6 SOHC (took a few months and a lot of advice and frustration) which at 40K miles still runs. Now I am interested in these air cooled engines.
We could meet when you are in town.

Dinner on Friday or Saturday night would be great. But you will have to come to us, because we are working grid for the race, and we are usually wiped out after that.

Any other Austin 914 owners want to join us?

[ChrisFoley]

This creates flutter inside the plenum which can make the air fuel meter flapper door flutter and give you issues.

Do you know this from experience?
My experience is that the AFM is not negatively affected by a fair amount of overlap.
It's harder to tune the engine because the programmed fuel curve isn't correct for the performance characteristics of a more aggressive camshaft.
Adjustments within the AFM to keep the metered fuel rate correct are limited so additional enrichment may be needed.