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The highest I've seen it so far is right around 170, but then as soon as I run full throttle (or as close to full as it will get now) it goes down to 120 in a matter of a few seconds.
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At 3800 rpms you could be getting detonation which would cause this and possibly your fuel fluctuation. I run a t-stat without the guts and mine runes around 110-120.
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kennyo, I think you are onto something here. My guts says its getting detonation. On an efi, how do I correct this? I ran it would thermostat at first and running at 110 has the same cutout at 3800. I wants to run faster I can tell and plenty of power it wants to make...it just can't.
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Stock or aftermarket injectors? Same for fuel pump?
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Believe the injectors would be stock, but the fuel pump seems to be upgraded. I unfortunately know nothing about this area. the fuel system runs though a red canister looking thing which appears to me aftermarket. My concern here is its not my dream boat and am at the point were I don't want to put much more into it so looking for the cost effective solution to get me through the next year or two till I upgrade.
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Originally Posted by lilwigs
(Post 2538102)
Believe the injectors would be stock, but the fuel pump seems to be upgraded. I unfortunately know nothing about this area. the fuel system runs though a red canister looking thing which appears to me aftermarket. My concern here is its not my dream boat and am at the point were I don't want to put much more into it so looking for the cost effective solution to get me through the next year or two till I upgrade.
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Be very careful with a blower on a non-Mag 454, you will cook a cast piston sooner or later unless your uber careful and have a perfetcly tuned setup.. I did it without a blower on my Chappy
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I couldn't agree more on the fact it's not a peformance boat. I'd of never put a charger on it myself to begin with. If anyone has any other ideas, I'll keep playing around and paying my mechanic for a little longer then, the charger may just come off. Never running this boat without the charger...would I notice a big difference (its a 5lb boost), other than my hole shot?
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Originally Posted by lilwigs
(Post 2538148)
I couldn't agree more on the fact it's not a peformance boat. I'd of never put a charger on it myself to begin with. If anyone has any other ideas, I'll keep playing around and paying my mechanic for a little longer then, the charger may just come off. Never running this boat without the charger...would I notice a big difference (its a 5lb boost), other than my hole shot?
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Originally Posted by lilwigs
(Post 2537344)
Thanks all! One more...
The mechanic just called and it doesn't appear to be pulling water in from the ports on the lower unit? I had it out two nights ago and it was moving water as I could see it coming out of the exhaust, plus I could see the water temp go up and down based on how I was running so I know it was getting water. could there be a blockage in the water movement to the engine causing it not to suck water? I'm sure the impeller was ok the other night. Presume it's an Alpha outdrive - sounds like the impeller, as the highr temps until you goose it - exactly what mine does every 5 yrs or so. As soon as new impeller, much more stable temp. When did this start, or has it always done this cut out thing at 3800 rpm, I mean since you owned it? |
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