how much hp can you make with a cummins 8.3 with mech fi?
03-27-2014 | 09:39 PM
#13
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From: medellin colombia, pablo escobar's lil town
03-28-2014 | 08:26 AM
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From: Freehold, NJ
Thanks for the nice words BUT you build me up way too much; I know old school ways and technology NOT what’s going on today! But the principles remain the same regardless of the times.
Ratman’s question was he wanted to know if he brought a pair of 6.7L truck take outs how would he marinize them and I'll give my opinions but first the throttling question.
Throttling the old mechanical fuel pumps went like this and I would assume electronic engines have to work the same – when you pull the throttles back after the props break loose of the water, boost will drop to ZERO. The governor senses you want the RPM to drop and it senses no load so the rack pulls back to idle position. You need to maintain boost so when you re-enter the water and props load up they don’t bring the engine rpms way down.
To achieve this (watch the Cowes race 1988, 1989 with Buzzi throttling Gancia and see his hand pumping hard) you pump the throttles very fast all the way to full speed, back and forth. What that does is the governor is being told you need to accelerate and the load is increasing. That will send the rack to wide open for a split second and dump fuel into the cylinders causing some heat to keep some boost until the governor realizes there is no load present, that is why you have to repeat that many times.
I would have to assume that newer electronic engines would work the same way, I would also guess that the newer engines have much more advanced pollution controls (LOL) than just an android valve that you could disable – the pollution controls could hurt you if you really needed to “throttle” the boat
Let’s be real - unless they brought back old school open ocean racing throttling like I described would never be need on today’s course simply because the amount of air time is just not there anymore.
In a pleasure boat out in the ocean in swells as ratman described that’s how it was done.
Ratman’s question was he wanted to know if he brought a pair of 6.7L truck take outs how would he marinize them and I'll give my opinions but first the throttling question.
Throttling the old mechanical fuel pumps went like this and I would assume electronic engines have to work the same – when you pull the throttles back after the props break loose of the water, boost will drop to ZERO. The governor senses you want the RPM to drop and it senses no load so the rack pulls back to idle position. You need to maintain boost so when you re-enter the water and props load up they don’t bring the engine rpms way down.
To achieve this (watch the Cowes race 1988, 1989 with Buzzi throttling Gancia and see his hand pumping hard) you pump the throttles very fast all the way to full speed, back and forth. What that does is the governor is being told you need to accelerate and the load is increasing. That will send the rack to wide open for a split second and dump fuel into the cylinders causing some heat to keep some boost until the governor realizes there is no load present, that is why you have to repeat that many times.
I would have to assume that newer electronic engines would work the same way, I would also guess that the newer engines have much more advanced pollution controls (LOL) than just an android valve that you could disable – the pollution controls could hurt you if you really needed to “throttle” the boat
Let’s be real - unless they brought back old school open ocean racing throttling like I described would never be need on today’s course simply because the amount of air time is just not there anymore.
In a pleasure boat out in the ocean in swells as ratman described that’s how it was done.
03-28-2014 | 08:37 PM
#16
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From: medellin colombia, pablo escobar's lil town
Thanks for the nice words BUT you build me up way too much; I know old school ways and technology NOT what’s going on today! But the principles remain the same regardless of the times.
Ratman’s question was he wanted to know if he brought a pair of 6.7L truck take outs how would he marinize them and I'll give my opinions but first the throttling question.
Throttling the old mechanical fuel pumps went like this and I would assume electronic engines have to work the same – when you pull the throttles back after the props break loose of the water, boost will drop to ZERO. The governor senses you want the RPM to drop and it senses no load so the rack pulls back to idle position. You need to maintain boost so when you re-enter the water and props load up they don’t bring the engine rpms way down.
To achieve this (watch the Cowes race 1988, 1989 with Buzzi throttling Gancia and see his hand pumping hard) you pump the throttles very fast all the way to full speed, back and forth. What that does is the governor is being told you need to accelerate and the load is increasing. That will send the rack to wide open for a split second and dump fuel into the cylinders causing some heat to keep some boost until the governor realizes there is no load present, that is why you have to repeat that many times.
I would have to assume that newer electronic engines would work the same way, I would also guess that the newer engines have much more advanced pollution controls (LOL) than just an android valve that you could disable – the pollution controls could hurt you if you really needed to “throttle” the boat
Let’s be real - unless they brought back old school open ocean racing throttling like I described would never be need on today’s course simply because the amount of air time is just not there anymore.
In a pleasure boat out in the ocean in swells as ratman described that’s how it was done.
Ratman’s question was he wanted to know if he brought a pair of 6.7L truck take outs how would he marinize them and I'll give my opinions but first the throttling question.
Throttling the old mechanical fuel pumps went like this and I would assume electronic engines have to work the same – when you pull the throttles back after the props break loose of the water, boost will drop to ZERO. The governor senses you want the RPM to drop and it senses no load so the rack pulls back to idle position. You need to maintain boost so when you re-enter the water and props load up they don’t bring the engine rpms way down.
To achieve this (watch the Cowes race 1988, 1989 with Buzzi throttling Gancia and see his hand pumping hard) you pump the throttles very fast all the way to full speed, back and forth. What that does is the governor is being told you need to accelerate and the load is increasing. That will send the rack to wide open for a split second and dump fuel into the cylinders causing some heat to keep some boost until the governor realizes there is no load present, that is why you have to repeat that many times.
I would have to assume that newer electronic engines would work the same way, I would also guess that the newer engines have much more advanced pollution controls (LOL) than just an android valve that you could disable – the pollution controls could hurt you if you really needed to “throttle” the boat
Let’s be real - unless they brought back old school open ocean racing throttling like I described would never be need on today’s course simply because the amount of air time is just not there anymore.
In a pleasure boat out in the ocean in swells as ratman described that’s how it was done.
03-28-2014 | 08:52 PM
#17
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From: 29°50'49.74"N 95° 5'17.55"W.......TEXAS
If you really want to go slow and hit the big water, buy this http://www.sunmachinery.com/tug_boats_for_sale.html
I prefer the ones with dual EMD's, cant find one for sale though
03-28-2014 | 09:48 PM
#18
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From: medellin colombia, pablo escobar's lil town
If you really want to go slow and hit the big water, buy this http://www.sunmachinery.com/tug_boats_for_sale.html
I prefer the ones with dual EMD's, cant find one for sale though
I prefer the ones with dual EMD's, cant find one for sale though
03-29-2014 | 05:02 PM
#20
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From: medellin colombia, pablo escobar's lil town
