aftermarket fuel injection

todd brinkerhoff · Post by **todd brinkerhoff** » Thu Oct 21, 2010 5:32 pm

Anyone install an aftermarket fuel injection system on their crusader or mercruiser 454. I have a buddy that installed a FAST fuel injection system on his '67 Chevelle with a chevy 454, which was installed on the original manifold. The project took about 3 hours, and required the installation of a fuel return. Very dummy proof. The technology and ease of installation has come a long way.

Anyway, he's had the system on for about 2 months and says that it was the best money he ever spent. The reliability and power increase are incredible. The motor starts right up and it has no hesitation even when cold. The system continues to adjust to the motor.

Just wondering if anyone has installed one on a boat application and what the results have been.

My motors have about 700 hours, so it may be a bit before I repower with something cool like a turbo diesel or a new shiny 8.1 gasser.

prowlersfish · Post by **prowlersfish** » Thu Oct 21, 2010 5:49 pm

Having seen several done I can tell you DON"T . they don't seem to work that well .

Stripermann2 · Post by **Stripermann2** » Thu Oct 21, 2010 5:57 pm

I'm with Paul, you will not reap enough benefit from the amount of money you put out.

k9th · Post by **k9th** » Thu Oct 21, 2010 6:06 pm

prowlersfish wrote:Having seen several done I can tell you DON"T . they don't seem to work that well .

Paul -

Can you give us some specifics of what you are referring to? I am interested to know what the problems are since I have considered it myself.

prowlersfish · Post by **prowlersfish** » Thu Oct 21, 2010 6:13 pm

Loss of power not reliable incresed fuel burn , Now a factory set up that comes on a new marine engine works well .

todd brinkerhoff · Post by **todd brinkerhoff** » Thu Oct 21, 2010 6:40 pm

Could that be from improper installation? The technology has come a long way, and you no longer have to have a computer engineering degree to hook them up. Its hard for me to believe a properly set up and calibrated fuel injection system would produce less power and less efficient fuel burn than a 20 year old carb, I wonder if a marine application, with weight and rpm makes the difference. My friend with his BB 454 couldn't be happier. Of course, it in a car.

prowlersfish · Post by **prowlersfish** » Thu Oct 21, 2010 7:14 pm

"properly set up and calibrated fuel" yes thats a key , I the people I know that tried and where not happy knew what they where doing ( Pros). A good FI system will use 02 sensors to control fuel . not to easy to set up with a marine exhaust , also marine FI engine may have cams that are set up for FI . the fuel has to be right on a marine engine to rich you burn fuel too lean you burn valves and pistons . Many of these kits are kind of fit all and that means it sort of fitts '

todd brinkerhoff · Post by **todd brinkerhoff** » Thu Oct 21, 2010 7:27 pm

good points

k9th · Post by **k9th** » Thu Oct 21, 2010 7:44 pm

Thanks Paul. As usual your insight into these issues is of great value.

rossjo · Post by **rossjo** » Sat Oct 30, 2010 8:07 am

Call JDDEN - he wants to get rid of 2 working TBFI units!

prowlersfish · Post by **prowlersfish** » Sat Oct 30, 2010 8:46 am

Being a factor setup that would be the way to go

todd brinkerhoff · Post by **todd brinkerhoff** » Sat Oct 30, 2010 12:43 pm

Do you have a way to contact him?

rossjo · Post by **rossjo** » Sat Oct 30, 2010 3:33 pm

See the "Am I Crazy" thread - JDDENS wants to get rid of his Mercruiser TBFI ... right up your alley!

RWS · Post by **RWS** » Sat Oct 30, 2010 8:15 pm

Stripermann2 wrote:I'm with Paul, you will not reap enough benefit from the amount of money you put out.

====================================

DITTO THAT

keep the quadrajets !

Make them right and you'll be fine

SERIOUSLY!

RWS

todd brinkerhoff · Post by **todd brinkerhoff** » Sun Oct 31, 2010 5:50 am

Alright...Alright...I will keep the quads. This just means I have to repower sooner.