How can I convert a 1981 Chevy 305 to fuel injection?

[rs2k]

I need a new carb and intake for my 1981 Chevy 305 which is bolted up to an old OMC stringer drive. Instead of spending $500 and putting on old technology I was considering installing a TBI system from a donor Chevy engine. What do I need to do to do this? I found a great article where someone did this to a 4.3 powered boat and now I plan on doing this to my 305.

 

[achris]

Re: How can I convert a 1981 Chevy 305 to fuel injection?

Just be sure that ALL the donor components are marine certified. Fuel systems are potentially the most likely to cause fire and explosion issues.

Chris..........

 

[rs2k]

Re: How can I convert a 1981 Chevy 305 to fuel injection?

Thank you for that word of safety. I fully understand that the parts must be marine safe and "explosion proof". This is why I am replacing my unsafe intake and carburetor. It had me worried when I saw my marine certified carb catch on fire while adjusting the timing three days ago.

 

[WizeOne]

Re: How can I convert a 1981 Chevy 305 to fuel injection?

.... I was considering installing a TBI system from a donor Chevy engine. What do I need to do to do this? I found a great article where someone did this to a 4.3 powered boat and now I plan on doing this to my 305.

Why don't you post the article?

One big obstacle that I could forsee is the computer control. One for a car will not work due to the lack of an oxygen sensor and probably many other sensors including the transmission.

After market marine tbi systems, such as Holley, use mapped ECUs that can be a real pain to dial in. They usually have numerous set points, such as idle and various points along to wot. If you could even use an exhaust sniffer while setting up, it would be easy to get the ratios down, but you can't.

http://store.summitracing.com/partdetail.asp?part=hly-700-21

As for safety, I think that auto systems are as safe as anything with marine on the lable but they are not certified.