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  #11  
Old 02-25-2018, 04:30 PM
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CantRepeat CantRepeat is offline
 
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Quote:
Originally Posted by thatsmrmastercraft View Post
Open loop fuel injection will not meet the performance of a properly tuned carburetor. I could rebuild a carb five times for the price of fuel injection. That said, a good fuel injection system would be cool.


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I'm with Pete on this; even if you had to buy a brand new carb.

The performance gained is nill and with a correctly adjusted choke you really don't gain all that much. Save the 2k for gas and beer.

If you really want EFI sell your boat and get something 94/95 up or find that one off 92 efi test boat.
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  #12  
Old 02-27-2018, 02:26 PM
Roman Roman is offline
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Two solutions to O2 monitoring.

Ive looked into doing this, but to be honest I like my boat to be reliable and easy to fix. A carb and a distributor is just that. If you do your own system you will be the only one who really will be able to service it effectively. That will kill re-sale value.

Otherwise its pretty simple to convert to EFI. The O2 feedback is what stumps most people and those are your solutions right there. The rest has been done a million times already.
If you want to to be USGC approved though then that is a whole other matter.

Last edited by Roman; 02-27-2018 at 02:53 PM.
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  #13  
Old 02-27-2018, 02:32 PM
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thatsmrmastercraft thatsmrmastercraft is online now
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Originally Posted by Roman View Post


That is interesting.
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  #14  
Old 02-27-2018, 02:53 PM
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CantRepeat CantRepeat is offline
 
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I guess if you want something bad enough you'll get it.
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  #15  
Old 02-27-2018, 03:02 PM
Roman Roman is offline
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Originally Posted by CantRepeat View Post
I guess if you want something bad enough you'll get it. But, reading wide band AF from one cylinder is a pretty bad idea.
Well you have to understand how the system works. You could still have a lean cylinder and a rich cylinder and then have them even out to look ok if the O2 feedback is in the collector. You can still run into an issue where you try to ride the edge of the limits to get the most bang, but you forget the O2 feedback is an average and then you still have a cylinder that is over the edge waiting to fail.

The danger in what your talking about is you arbitrarily pick a cylinder and you picked the richest one, and you force the entire system leaner, causing a potential issue on a cylinder that seems to be lean by design.

There is lots of info out there as to which cylinders perform rich/lean/average . So you would have to go do your research and see which cylinders are the worst offending for being either way rich or lean and avoid the richest. Or pick the leanest one and monitor that. You typically don't blow a motor from running to rich.

OR you could sensor every single one individually and then tailor fueling individually to each cylinder. That's how we did things for formula sae. Max power and efficiency. Go big or go home! In this case though you need to have one injector for each cylinder to take advantage of all the extra knobs you can turn now with the feedback you have

Last edited by Roman; 02-27-2018 at 06:20 PM.
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  #16  
Old 02-27-2018, 07:08 PM
Roman Roman is offline
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This is cheap EFI
https://www.summitracing.com/parts/sum-240500

The price and name brand makes me wish I bought this instead of my quickfuel carb when I upgraded my fuel system.
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  #17  
Old 02-27-2018, 10:24 PM
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thatsmrmastercraft thatsmrmastercraft is online now
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Quick Fuel carbs have an attractive price but they are a too simplified 4160.

I would be concerned about a too simplified fuel injection system too.


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  #18  
Old 02-28-2018, 10:58 AM
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east tx skier east tx skier is offline
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Upgrading to fuel injection is easy.

1. Unscrew throttle knob from carbureted boat.
2. Sell carbureted boat.
3. Buy fuel injected boat.
4. Reinstall throttle knob.

In all seriousness, I thought about this a lot when I had my 93 MC. I now have a fuel injected boat and love it, but fuel injection is far from its best feature. But if I suddenly had my 93 back, I would keep the carb in good working order and not worry with trying to retrofit TBI system.
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