Looking for 400hp on 383's
any numbers yet Diego?
12-01-2012 | 01:44 AM
#272
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From: Between A Womans Leggs in IL
fixx
The builder's expectation of a 4000 RPM WOT limit is totally unrealistic. In my 40 years of boating with gasoline powered I/O watercraft I have never been on or operated a vessel that had a 4000 RPM limit. Having said that...I could understand a 5600 RPM limit but 4000 RPM....really?
12-01-2012 | 07:30 AM
#273
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From: Ocala, Fl
12-06-2012 | 05:50 PM
#275
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From: Sunny Isles Beach,Fl.
Finally some numbers !!! Goal achieved !!
here we go !!!
398hp @ 5200 rpm
459.8 lbs/tq @ 3080rpm
timing set only at 34 degrees (conservative)
Thanks everyone for the advices and support i am very happy with the results.
Now i need to think what to do with them
398hp @ 5200 rpm
459.8 lbs/tq @ 3080rpm
timing set only at 34 degrees (conservative)
Thanks everyone for the advices and support i am very happy with the results.
Now i need to think what to do with them
12-06-2012 | 06:34 PM
#276
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From: Ocala, Fl
Remember everybody...these engines are running only 5200 RPM Max!!
Frig the horsepower....give me torque numbers like this at those RPM levels all day....and I will run it ALL DAY without a whimper...Great Job!!!
Last edited by sprink58; 12-06-2012 at 06:36 PM.
12-06-2012 | 08:05 PM
#278
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From: Between A Womans Leggs in IL
fixx
edit,,look at cylinder 3 and pull a plug and make sure you dyno the other one for comparison.. also do a compression test on 3..
Last edited by FIXX; 12-06-2012 at 08:09 PM.
12-06-2012 | 08:24 PM
#279
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Sorry but,,those hp numbers are way off,,that thing should be putting out at least 75 hp more!!!! also your egt on cylinder # 3 is at 34? which is way to low..
edit,,look at cylinder 3 and pull a plug and make sure you dyno the other one for comparison.. also do a compression test on 3..
edit,,look at cylinder 3 and pull a plug and make sure you dyno the other one for comparison.. also do a compression test on 3..
I dont think a 383 is going to make 475 with the parts he described - especially at 5200 RPM.
Sprink is right - HP doesnt mean jack other than a bragging number and making sure you are in the ballpark. Torque rules the day in a boat.
The torque number looks great - too good to be fully off of one hole, but depending on weather the sensor may have a known issue i'd have to assume Laz would pull the plug and check it, but you are right something looks off on the chart.
How close is the other mill Diego? and how much time did it take to get to 398 - how many pulls? Im assuming if its one mill only it took all day.
Congrats!
Uncle Dave
12-06-2012 | 08:35 PM
#280
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From: Sunny Isles Beach,Fl.
Its something to look at.
I dont think a 383 is going to make 475 with the parts he described - especially at 5200 RPM.
Sprink is right - HP doesnt mean jack other than a bragging number and making sure you are in the ballpark. Torque rules the day in a boat.
The torque number looks great - too good to be fully off of one hole, but depending on weather the sensor may have a known issue i'd have to assume Laz would pull the plug and check it, but you are right something looks off on the chart.
How close is the other mill Diego? and how much time did it take to get to 398 - how many pulls? Im assuming if its one mill only it took all day.
Congrats!
Uncle Dave
I dont think a 383 is going to make 475 with the parts he described - especially at 5200 RPM.
Sprink is right - HP doesnt mean jack other than a bragging number and making sure you are in the ballpark. Torque rules the day in a boat.
The torque number looks great - too good to be fully off of one hole, but depending on weather the sensor may have a known issue i'd have to assume Laz would pull the plug and check it, but you are right something looks off on the chart.
How close is the other mill Diego? and how much time did it take to get to 398 - how many pulls? Im assuming if its one mill only it took all day.
Congrats!
Uncle Dave
Number 2 is going in tomorrow i will bring these up to Laz, he had runs wilth 402 hp @5200 , started engine this morning and by 1pm he was running these numbers .
I am happy with the numbers if it can run better than this i would be thrilled.
I will see Laz tomorrow am.
