Fuel Injection ??

[SUPRA_ALLEGRO_LANE]

Anybody thought about doing or have done a Fuel Injection upgrade to there boat?

I'm looking at doing this one on my Allegro.

http://www.jegs.com/i/Holley/510/550-511/10002/-1?CAWELAID=230006180004725304&CAGPSPN=pla&CAAGID=15769068431&CATCI=pla-208407112151&gclid=CLz1_4WC1M4CFVFsfgodlhQK2Q

[wotan2525]

That's really cool - I didn't know they had a package that was that inexpensive!

But.... it's not going to get you many gains over your carb. Do you have a problem that you're trying to solve or is this just a why-not-upgrade?

[4nryde]

How does this work? I would guess it needs a o2 sensor, tps sensor, etc.....


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[SUPRA_ALLEGRO_LANE]

Wotan2525, it's a why not upgrade. I figure I'm gonna get better fuel hours out of it too. Plus should relieve me of my load up on long idles and no wake areas. I was planning on upgrading the manifold and carb this winter anyways, and the fuel injection is little cheaper.

4nryde, is a full plug and play system. Install it, give it power, ground, spark from coil, and one other I can't remember, then go run it. It teaches it self from your dining.

[wotan2525]

Wotan2525, it's a why not upgrade. I'm gonna figure I'm gonna get better fuel hours out of it too. Plus should relieve me of my load up on long idles and no wake areas. I was planning on upgrading the manifold and carb this winter anyways, and the fuel injection is little cheaper.

4nryde, is a full plug and play system. Install it, give it power, ground, spark from coil, and one other I can't remember, then go run it. It shelf teaches it shelf from your dining.

The only rub on these systems is always the O2 sensor. It's not quite as easy to add one to a wet exhaust as it is to a traditional car exhaust.

[SquamInboards]

4nryde, is a full plug and play system. Install it, give it power, ground, spark from coil, and one other I can't remember, then go run it. It shelf teaches it shelf from your dining.

Fuel. That's the one haha.

On a serious note, this is a TBI system, yes?

[korey]

I've done a bunch of FI work with cars: aftermarket Haltech on a modern car (Scion FR-S), self-built megasquirt on a boosted miata, AEM on a honda (origonally carb) Honda CBR600 engine in a tubeframe road-race car...

That's got a Bosch 409 Wideband O2 Sensor. No-deal on marine applications. A wideband O2 sensor is the heart and soul of any of the "auto tuning" aftermarket fuel injection systems.

This accessory was developed for mercruiser I/Os to keep an O2 sensor dry in wet exhaust, but I;ve got no experience with it.
http://howellefi.com/general-motors/gm-tbi-products/parts-and-accessories/miscellaneous-accessories/adaptor-o2-sensor-for-marine-use/

Here is some more reading from Holley:
http://www.holleyinjection.com/holley-efi-university/converting-marine-engines-to-efi

[NorCalPR]

I'm not sold on them. My buddy had zero issues with his carb then he did fi. Ran without issues till we went on the Rubicon and I had to tow him out.

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[4nryde]

I have researched/considered this several times. Each time I end up with the same conclusion. For the money invested its not worth the hassle. Carbs are simple and easily rebuildable at home. A properly setup carb runs great and produces good power.


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[cadunkle]

Anybody thought about doing or have done a Fuel Injection upgrade to there boat?

I'm looking at doing this one on my Allegro.

http://www.jegs.com/i/Holley/510/550-511/10002/-1?CAWELAID=230006180004725304&CAGPSPN=pla&CAAGID=15769068431&CATCI=pla-208407112151&gclid=CLz1_4WC1M4CFVFsfgodlhQK2Q
It's not an upgrade, just a change. TBI is junk, a glorified expensive carb, if you're going to change at least do MPI. Either way the biggest challenge just getting it to work is keeping the I2 sensor dry. Look at manifolds on newer engines and see if they'll fit. You'll likely be in it for well over a grand for manifolds or headers that will bolt on and keep the sensor dry, and width may be an issue so consider the pain of widening the doghouse. All to get the same thing a carb does.

I say fix your carb problem with loading up at idle. Could be high float level, damaged idle mixture needles or metering blocks, dirty passages or air bleeds, or any number of things. Rebuild the carb and start tuning from scratch, you'll have it fixed for $50 and a little time.

[lively]

What about closed cooling ? Could that O2 stay dry ? I haven't seen closed cooling on Windsors , but I'm sure they have them .

My question is there a closed loop O2 for MPI ? Just a basic map for basic engine rpm ect ?


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[cadunkle]

What about closed cooling ? Could that O2 stay dry ? I haven't seen closed cooling on Windsors , but I'm sure they have them .

My question is there a closed loop O2 for MPI ? Just a basic map for basic engine rpm ect ?


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Closed cooling has nothing to do with the O2 sensor. In closed cooling the manifolds can be part of the closed part but the risers are not. This has no bearing on the sensor as typically you place it in the riser to get an average of one bank instead of tuning all cylinders mixture to the needs of just one. To run an I2 you need a riser that can accommodate one, some have modified factory parts to work, and you'll likely need to extend the point where exhaust and water meet. Reversion will wet an O2 sensor before it will kill an engine.

If you really want to go down this rabbit hole why not just buy either a factory EFI engine and bolt in or buy the EFI parts from someone converting a newer Mercruiser BBC to carb? EFI to carb is a common swap, gotta be parts out there.

[SUPRA_ALLEGRO_LANE]

I love to see everyone's thought on this. My feeling it is a upgrade for the engine. I just feel that Carbs are out dated, and with the technology out there today even the basic TBI is better than a Carb. The kit that I showed is super easy to install and doesn't require the 02 sensor that some do. Looks to me a very easy Plug and Play system. Just my 2 cents.

[cadunkle]

I love to see everyone's thought on this. My feeling it is a upgrade for the engine. I just feel that Carbs are out dated, and with the technology out there today even the basic TBI is better than a Carb. The kit that I showed is super easy to install and doesn't require the 02 sensor that some do. Looks to me a very easy Plug and Play system. Just my 2 cents.
You may feel it's an upgrade but the fact is it is fundamentally just a change. Perhaps an upgrade over a worn out and dirty 600 CFM 4160 but not over a 4150, just different. TBI does not and can not meter, mix, or distribute fuel any better than a carb. This is a limitation of whatever intake you are using.

The Holley Sniper system you linked requires an O2 sensor. Some systems can run without an O2 sensor but they are not "plug and play" in that you will be spending quite a bit of time tuning your maps, and without an O2 sensor you'll be doing a bunch of plug chops. I suspect it may require a temp sensor as well. You'll want to research if running a lower temp like in our boats is a problem. If you only operate in fresh water you can safely go to a >145* thermostat without significant additional buildup in the cooling passages.

[lively]

You may feel it's an upgrade but the fact is it is fundamentally just a change. Perhaps an upgrade over a worn out and dirty 600 CFM 4160 but not over a 4150, just different. TBI does not and can not meter, mix, or distribute fuel any better than a carb. This is a limitation of whatever intake you are using.

The Holley Sniper system you linked requires an O2 sensor. Some systems can run without an O2 sensor but they are not "plug and play" in that you will be spending quite a bit of time tuning your maps, and without an O2 sensor you'll be doing a bunch of plug chops. I suspect it may require a temp sensor as well. You'll want to research if running a lower temp like in our boats is a problem. If you only operate in fresh water you can safely go to a >145* thermostat without significant additional buildup in the cooling passages.

What temp tstat would be good to stay at ? Cadunkle ? Also I'm needing some insight on my engine build when you can shoot over to my thread . "Sorry to high jack "


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[Wulphie]

I love to see everyone's thought on this. My feeling it is a upgrade for the engine. I just feel that Carbs are out dated, and with the technology out there today even the basic TBI is better than a Carb. The kit that I showed is super easy to install and doesn't require the 02 sensor that some do. Looks to me a very easy Plug and Play system. Just my 2 cents.


https://www.youtube.com/watch?v=2sQJPZYSoUI

Fuel injection is great for turbos and such but not really needed for a old v8

[cadunkle]

What temp tstat would be good to stay at ? Cadunkle ? Also I'm needing some insight on my engine build when you can shoot over to my thread . "Sorry to high jack "


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If running in salt or brackish, 140-145. Somewhere between 145 and 160 salt will crystallize, coating all coolant passages with salt crystals which reduced flow and acts as an insulator between the hot block and heads and the coolant.

In fresh water 160-170 will result in less cylinder wall wear and theoretically a more efficient running engine. 180+ is pushing it in my opinion if you have raw water cooling as there is potential to boil the water under some conditions such as running it hard then coming to idle. Everything is very hot and suddenly coolant flow drops, potentially boiling.