10 Meter Stringer Progress

[RWS]

Paul,

You are absolutely correct, and that advice applies in nearly all applications, however in my case the numbers transferred directly over to NAPA numbers.

A mechanical fuel pump can be a dangerous animal in a gas boat. it can leak out into the bilge or into the crankcase.

Fuel lines must be USCG approved and labeled as such.

In the best interests of the forum, I will edit that post as it could be taken as a general statement.

RWS

[prowlersfish]

RWS , thank you nothing wrong with using NAPA parts as the carry a good line of marine parts . Just don't want someone sticking a car part on to save a buck as it could be a safety issue .


One nother safety note . Fuel lines if you have older fuel lines You should change them . The older line are not made for the new fuels . the newer marine fuel lines are made for the newer fuels .
I would also keep a eye on other fuel system parts . you could save your own neck .

[low944]

Todd,

There is a high likelihood that you will find a Y pipe in your exhaust system that connects the left and right sides together to a common tube to exit the boat. Take a look at yours and you may find that there is a diverter made into this piece (if memory serves me I think it may be cast iron)

Take these (one on each engine) to a machine shop and have that diverter plate cut out of there. It will reduce the exhaust back pressure.

Also take a look at the height of your flame arrestors and if they are less than 1.25 or so see if you can fit a taller flame arrestor into the vertical space you have available.

These two changes will afford your 454's less restriction and better breathing.

When I did mine I saw more than a 10% increase in fuel economy and actually documented his with flowscan/GPS/digital tach-synchronizer.

RWS

I gotta say, RWS is such a wealth of good knowledge on the 10 meters! Well and the crusaders. RWS, do you have any pictures of this diverter plate before and after the cut out? I will plan to do this along with the flame arrester and pics would be nice to know exactly what should be done. Also what flame arresters did you go with?

Thanks,
James