SoCal Jet Boats
Tech Talk => Projects => Topic started by: che77y on June 14, 2015, 03:52:21 PM
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So I finished up the boat it took 6 mnths roughly and the engine runs great! There's some slop in the steering it feels like I guess I can adjust that out? 2 it's a 455 .030 over comp cam 290 and over the transom logs 's' pipe anyway I had 61 mph on gps and I was turning 4k I believe it's an A impeller. Does this sound right?
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Yes....ish
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Yes....ish
I sort of agree.
Sup buddy?
GT
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I sort of agree.
Sup buddy?
GT
Without knowing the condition of the bottom, water, pump, rigging, how the boat was loaded or what it was loaded with, that's not a bad number.
A better indicator would be running the motor till it falls on its face.
But he didn't do that and the Olds held together, so that's a feat in its self.
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Lol agreed it's a delta not so deep of a v I had 2 of my buddies w me as well and they were probably an extra 240 pounds and I'm 225 by myself
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Brand new pump berk jc w place divertor . Yea I ran it till I could not gain anymore rpm 4k was all I got
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Brand new pump berk jc w place divertor . Yea I ran it till I could not gain anymore rpm 4k was all I got
Not that the Olds will like it, but you need more rpm.
Unless the boat is doing exactly what you need, then I'd say your doing just fine.
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Brand new pump berk jc w place divertor . Yea I ran it till I could not gain anymore rpm 4k was all I got
What carburetor do you have on this deal?
You really need to be turning closer to 4,500 rpm. I feel you're lugging it down too hard. Unless of course your tachometer is wrong, then never mind.
Lol
GT
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That could be true it's an old hardin tach. I've got a 750 I just rebuilt and put the stock jet size for the carb number in the primary and secondary it's a double pumper w a 6.5 power valve. The timing is set where it seems to be loving the start w out being to advanced and I've barely set the dwell but it runs very strong through out the entire rpm band. I did install a loader and trimmed it flush w the keel.
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That could be true it's an old hardin tach. I've got a 750 I just rebuilt and put the stock jet size for the carb number in the primary and secondary it's a double pumper w a 6.5 power valve. The timing is set where it seems to be loving the start w out being to advanced and I've barely set the dwell but it runs very strong through out the entire rpm band. I did install a loader and trimmed it flush w the keel.
Dwell?
You have points?
Here's a short list.
I have not seen your boat, nor heard it run so "grain of salt" all of this that follows.
Convert to electronic ignition.
Replace the 6.5 PV with a 4.5
Get your timing assisted for top advance, base is irrelevant to a point.
The engine should be able to make 4,500 rpm without killing itself. Get a quality portable tach. to verify what you have.
GT
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Yes i have points. Ok bro will do. So you don't think it's the pump at this point that causing the limitations on rpms?
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Yes i have points. Ok bro will do. So you don't think it's the pump at this point that causing the limitations on rpms?
Not at 61mph.
GT
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Not at 61mph.
GT
10-4 I hope to bring it up a lil then thanks for taking the time I'll let u know how it all goes or doesn't lol