You're entitled to your opinion and we know you definitely have one. Look all I was saying were facts of big blocks over small blocks. If you want to call bs I suggest less talking and we can meet at the lake and ill show you. I'm not one to get caught up in key board racing or arguing on these forums. Just thought I'd bring up valid points on this question that was asked. If you don't think my motor produced enough power to push a "healthy" A impeller pump to 6400 then I guess you must be right and I obviously don't know what I'm doing... But hey I'm not loosing sleep over your opinions...


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Anyways the only reason I even brought it up was I saw this Riva that has twin v12's in it built for the founder of Lamborghini. Pretty sick looking boat.


Life is uncertain. Don't sip.

You're entitled to your opinion and we know you definitely have one. Look all I was saying were facts of big blocks over small blocks. If you want to call bs I suggest less talking and we can meet at the lake and ill show you. I'm not one to get caught up in key board racing or arguing on these forums. Just thought I'd bring up valid points on this question that was asked. If you don't think my motor produced enough power to push a "healthy" A impeller pump to 6400 then I guess you must be right and I obviously don't know what I'm doing... But hey I'm not loosing sleep over your opinions...


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I appreciate you allowing me to have my opinion.   

I just cannot get my head wrapped around the fact that you have probably the one and only bored out 454 on the planet that makes 1000HP at just under 800 ft/lbs. of torque without a blower, nitrous, E85....

If you have a set up that spins an A impeller at 6400 RPM with no cavitation or slippage, that boat better go in excess of 100MPH....

Don't mean to be cynical, but there is just no way.

Not trying to be a douche, just attempting to keep it real.   

GT

Anyways the only reason I even brought it up was I saw this Riva that has twin v12's in it built for the founder of Lamborghini. Pretty sick looking boat.


Life is uncertain. Don't sip.

I saw a boat several years ago that had a Viper V-10 in it, but that was as close as I have seen to what you speak of. If memory serves, the performance was lack luster, I think they missed the pump set up by a long ways.

GT

That's a lot of side drafts to sync


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You're entitled to your opinion and we know you definitely have one. Look all I was saying were facts of big blocks over small blocks. If you want to call bs I suggest less talking and we can meet at the lake and ill show you. I'm not one to get caught up in key board racing or arguing on these forums. Just thought I'd bring up valid points on this question that was asked. If you don't think my motor produced enough power to push a "healthy" A impeller pump to 6400 then I guess you must be right and I obviously don't know what I'm doing... But hey I'm not loosing sleep over your opinions...


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everything boat related comes down to numbers.  sure theres that one hull that changes the rules, etc but for the most part (a)rpm + (b)impeller + (c)hull = some result. 

all he's saying is that at 6400 with that impeller the numbers just dont add up with a NA bbc.



to turn that impeller to 6400 would require almost 1000hp.  And to get 1000hp out of a NA bbc isnt exactly "common"

id love to see a gps shot or a video.  sounds like you have a gem of a boat.

I make 625 with 10.2 to 1 461, i turn a B1 detailed B- to 6400.
I was told once you start adding loaders, inducers, shoes ect... The impeller chart goes out the window.
I've got data to back that up as well. According to the chart i should be spinning 6200 to 6100.

This totally reinforces what have previously stated... Slippage.

You can call it slip, cavitation, bypass, blowout.

But the long and skinny is, loss of impeller efficiency. Not necessarily a bad thing, but if you could get it to hook up harder, you would be out of your rpm range needed to make the power you are..

In short meaning you would need more torque to get the same revs.

Without extensive data acquisition and plotting information into formulas, there us really no perfect answer.

GT



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everything boat related comes down to numbers.  sure theres that one hull that changes the rules, etc but for the most part (a)rpm + (b)impeller + (c)hull = some result. 

all he's saying is that at 6400 with that impeller the numbers just dont add up with a NA bbc.



to turn that impeller to 6400 would require almost 1000hp.  And to get 1000hp out of a NA bbc isnt exactly "common"

id love to see a gps shot or a video.  sounds like you have a gem of a boat.

so according to this chart if I'm running a A impeller and spending 5'500 rpm I'm around 600 hp am I understanding this right


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I was beginning to think I was all alone on this.

GT

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Your definitely not alone, I didn't want to pile on.  You looked like you had it covered.  There's definitely something in the math that doesn't add up.  My dyno sheet says I make 825 HP and I'm spinning a bronze A 61-6200 rpm.  Loader, shoe, ride plate.  Looks like that chart fits my set damn close.

Your definitely not alone, I didn't want to pile on.  You looked like you had it covered.  There's definitely something in the math that doesn't add up.  My dyno sheet says I make 825 HP and I'm spinning a bronze A 61-6200 rpm.  Loader, shoe, ride plate.  Looks like that chart fits my set damn close.

i have an aluminum A bronze A and aluminum A are completely different.


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Care to expand on this?

Curious as hell where this goes.

curious of what? The difference between aluminum and bronze? I'm confused.


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Do you care to expand on how a Mag/bronze and an aluminum impeller of the same cut are, as you say "completely different", because they are NOT.

I would describe them as "extremely similar"....

GT

so in your opinion an alluminum Berkeley A. Impeller spins the same rpm as say a bronze aggressor impeller? Same application...


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so in your opinion an alluminum Berkeley A. Impeller spins the same rpm as say a bronze aggressor impeller? Same application...


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Who said Berkeley?, Not me... And yes they do.

Bc they do NOT.... That is my point


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Anytime two pieces of equipment are compared you have to go apple for apple, not pineapple to summer squash....

The similarities of the two, even a Berkeley are strikingly similar, the difference is literally much less than 100 RPM cut for cut.

My first race pump, while this was quite some time ago, had an Aggressor 9 vane bowl and an Aggressor Mag/Bronze A cut, when we broke the living snot out of the impeller because of eating a MLB regulation sized piece of cobble, I installed a detailed A cut Berkeley aluminum and was back in the water later the same day, the boats performance was nearly identical, there was a slight rise in WOT RPM (negligible), but that could have been due to a loader that was slightly different because we broke the previous one clean off. Speed was within a mile or two.

You have some bad info IMHO.

GT

y try 200-400 harder with an aggressor over the alluminum A


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your opinions are your opinions. Certainly not facts. I do happen to have quite a bit of knowledge on this. In fact enough to know when it's not even worth posting anymore on the subject. This isn't even what the thread was about anyways... So it is what it is. But not worth even going back and forth over anymore bc it's all talk at this point.


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