Carb to Fuel injection conversion?

[JimN]

Originally Posted by JDK

....except for the damn fuel pump (the engine mounted one with the internal by-pass). I've looked and looked and looked for a 'generic replacement'.
Any ideas as to what other applications this pump may have been used in???

The first in-tank pumps were Carter, off the shelf.

[JimN]

Originally Posted by Credo

The only question that I have with using a car multiport injection system ona boat would be the 02 sensor. I know that Ford ECU's take their main readings from the MAF and O2 sensor wouldn't a wet exhaust system corrupt the reading from the 02 sensor? And make the engine think its running rich?

The newer boats (since about '05) have catalytic and O2 sensor and the people who used to do a lot of development for MC and Indmar were working on making it work when I was going to tech training, in 1999 and 2000.

[east tx skier]

In think the cat showed up on the MCX around 06.

[j.mccreight@hotmail.com]

No o2 required

http://www.edelbrock.com/automotive_...pf_intro.shtml

[CantRepeat]

Originally Posted by j.mccreight@hotmail.com

No o2 required

http://www.edelbrock.com/automotive_...pf_intro.shtml

Then why does it come with one?

A narrow band O2 sensor is included and is also wide-band 02 compatible (wide band O2 not included).

[CruisinGA]

As far as the fuel pump problem...

A relatively common practice in my "other" motorsport, rock crawling, is to use the mechanical engine mounted fuel pump to pull fuel from the tank and then have it fill a vertically oriented ~.25 gallon tank which the high pressure electric fuel injection pump draws from the bottom of.

This accomplishes several things- avoids having to run an in-tank fuel pump, uses the mechanical diaphragm pump which is better at "pulling" fuel than electric ones to bring the fuel from the tank, eases load on your expensive high pressure electric pump, and gives you a .25 gallon fuel supply that is available at almost any angle. The angle part is important in rock crawling, but not so much in boats.

[j.mccreight@hotmail.com]

^ sorry didnt read the discription just looked at the pretty ford picture

[Credo]

Ok so I have been doing alot of research on the "megasquirt II" system. Well I think it could be done with a Ford 2 bbl carb intake a $40 adapter plate from trans-dapt. And any GM TBI with a built in regulator, TPS, and injector set up. To take control of the ignition advance use a TFI Distributor and now they make marine wideband o2 sensors I think a junkyard TBI is like $100 and the TFI is $60 a boost-a-pump is like $100, Megasquirt II is $250 to $450 and you just need to figure out the tank situation. and you can swap that carb out for a GM TBI. I think you could do it all for about $1k Now the question is the cost benefit analysis. The million dollar question is it worth it?

[CantRepeat]

The wideband o2 you linked to is not a marine o2. I'm running that setup in my Suburban. I do not think there is an o2 sensor made that will work when wet. All of the MC motors use a dry exhaust system that doesn't introduce water until after the o2 sensor.

I'm pretty convinced the only way to convert an older 351 to efi is going to be a well tuned open loop system. Either that or making some sort of new exhaust system.

[1redTA]

holy thread resurrection! In my opinion! a TBI is not worth the hassle of retrofitting on to a boat that has a GOOD 4160 carb. the tbi is really nothing more than a 2V carb that keeps a wet manifold on the other hand, a multi port fuel injection even a TPI with its long runners and torque would be a worthwhile attempt.


I cant wait to get a 205 with a LT-1