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Originally Posted by kennyo
(Post 2525606)
Your base pressure seems to high if you are using a boost referenced fmu. I fueled my last motor to death. I'm getting "in boat" tuning this time. It's the only way to go if you don't dyno it. Out of town remapping is a shot in the dark at best!
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Originally Posted by Griswald
(Post 2525547)
Does your fuel pressure rise and stay constant throughout the run?
Maybe your fuel plumbing is the issue. I run my main fuel line to an SX regulator then take the return from that to the FMU. The output of the FMU returns back to a T fitting at the inlet of the fuel pump. |
the anti siphon valves are in the fitting that your fuel line hooks to at the tank it might be a elbow or maybe straight. pull the hose off and unscrew the fitting from the tank and see if there is a check valve in it . if so the hole is only a 1/4 inch and has to lift the ball off the seat as well.
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So you have ECM tuning capabilities?
You have the mechanical ability to swap injectors? Why in the world would you be still running a FMU? This is not 1985. 14.5:1afr that motor is a ticking time bomb. Also at 11:1 at low rpm and no boost you are just putting fuel into the crank case. Wow! |
Originally Posted by Warlock28SXT
(Post 2525430)
the plugs looked ok I did do this last year. I'm hoping to make some more progress this week weather looks good for a couple of days Thanks for the reply
I went up to BBlades and tried a 28" stock Bravo 1 see above |
Thats whats fundimentaly wrong with procharger. Tuning the AFR by running the engine to different rpms and then shuting off and looking at the plugs. Thats seems so rediculess.
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Using the old ati regulator my plugs looked perfect but I was adding a QT. of gas to the Crankcase everytime I went out.
I think it normally takes 2-3 engines to figure out a procharger, Just ask me Jerry and Smitty! |
Originally Posted by Canada Jeff
(Post 2526170)
Thats whats fundimentaly wrong with procharger. Tuning the AFR by running the engine to different rpms and then shuting off and looking at the plugs. Thats seems so rediculess.
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Originally Posted by GPM
(Post 2526161)
What color is OK ? how much boost are you seeing? What throttle body are you running?
Jerry I just pulled the fuel lines off at the tank. no anti siphon valves. Kennyo This is my second motor. The first one died before I had a chance to dig into this. I'd love to get this resolved 80 MPH is just not cutting it. My last boat ran 100+ w/an OB. Thanks again to all for the input |
A 30 pitch prop and 1.36 drive is alot to pull,if your afr's are good at 60 psi (seems kinda low for a procharged motor) then a smaller prop is in order,Smitty
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