Berkley jet question.
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Berkley jet question.

  1. #1
    Senior Member Dominator Scott's Avatar
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    Default Berkley jet question.

    So I am currently running a stock 460 Ford motor with a tunnel ram,dual 600 Holleys and OT headers in my Sanger SuperJet.
    It has a Berkley 12JG pump with an aluminum A Impellar and a loader grate. I am currently spinning about 4700-4800RPM's at WOT.

    My question is what is the RPM efficiency rating of my A impellar because I am thinking I want more horsepower out of my motor with a cam and head upgrade come this winter. Ultimately I would like to throw a blower on her but I don't see that in the cards at this time.


    What are your thoughts.

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    Senior Member jet pilot's Avatar
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    Here is a pump curve chart I found, the purple line is for a AAA impeller.

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    Depending on your pump condition your engine is making around 350Hp. Rough rule of thumb the aluminum impellor is good to about 500 Hp. I am sure there or those on the forum who have run more Hp and had pump live but like I said it is rough rule of thumb.
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    Senior Member DonnyLe's Avatar
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    Quote Originally Posted by fastmarlene View Post
    Depending on your pump condition your engine is making around 350Hp. Rough rule of thumb the aluminum impellor is good to about 500 Hp. I am sure there or those on the forum who have run more Hp and had pump live but like I said it is rough rule of thumb.
    I had a 78 Sanger Jet Hydro back in the day and spun an B Aluminum up to 6300 with Nitrous on a 480 ci Ford. I never had and impeller problem. If you keep it loaded and don't "fly" the boat I think you will be fine with what you are doing. Just my 2 cents.

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    Senior Member Dominator Scott's Avatar
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    Quote Originally Posted by fastmarlene View Post
    Depending on your pump condition your engine is making around 350Hp. Rough rule of thumb the aluminum impellor is good to about 500 Hp. I am sure there or those on the forum who have run more Hp and had pump live but like I said it is rough rule of thumb.
    500 HP to 550HP would probably make me happy as long as it put the boat into the 80+mph bracket. Now the question is would a cam and a set of CobraJet heads get me there? A moster blower motor would be awesome but I don't think triple digits in the Sanger would be a wise idea.

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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by Dominator Scott View Post
    My question is what is the RPM efficiency rating of my A impellar because I am thinking I want more horsepower out of my motor with a cam and head upgrade come this winter. Ultimately I would like to throw a blower on her but I don't see that in the cards at this time.

    Scott your numbers currently are pretty close for a mild BBF "A" impeller deal ,According to literature, 500 Hp 4700 rpms are considered the upper HP limits for an OEM Berk aluminum impeller ( not sure I agree ) More HP or forced induction will likley have you looking at a Bronze or Stainless Impeller and perhaps a stronger pump shaft etc

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    Senior Member Dominator Scott's Avatar
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    Quote Originally Posted by jetboatperformance View Post
    Scott your numbers currently are pretty close for a mild BBF "A" impeller deal ,According to literature, 500 Hp 4700 rpms are considered the upper HP limits for an OEM Berk aluminum impeller ( not sure I agree ) more HP or forced induction will likley have you looking at a Bronze or Stainless Impeller and perhaps a stronger pump shaft etc


    I imagine a new impellar would be a good idea if I pull the motor. I have no complaints with how she runs. I just wanted a snotty sounding cam and some better heads so she could generate some more HP. The motor has never been redone and internally is all original. Right now at WOT she runs about 65-67mph at 4700-4800RPM's

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    Senior Member Widetrack's Avatar
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    Quote Originally Posted by Dominator Scott View Post
    500 HP to 550HP would probably make me happy as long as it put the boat into the 80+mph bracket. Now the question is would a cam and a set of CobraJet heads get me there? A moster blower motor would be awesome but I don't think triple digits in the Sanger would be a wise idea.
    I think that I would talk to Lakes Only here on the boards! He is a Ford guru and can point you in the right direction! AKA, best bang for your buck! Ford SJ heads are good but I think they are to much for a mild build as you are asking for! JMO! But the right cam and heads will get you past the 500 HP mark easy! And you may have some good heads to work with already!


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    Senior Member Dominator Scott's Avatar
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    Quote Originally Posted by Widetrack View Post
    I think that I would talk to Lakes Only here on the boards! He is a Ford guru and can point you in the right direction! AKA, best bang for your buck! Ford SJ heads are good but I think they are to much for a mild build as you are asking for! JMO! But the right cam and heads will get you past the 500 HP mark easy! And you may have some good heads to work with already!

    From what I am told they are small port heads and nothing to brag about. One of our techs here at the dealership nis a Ford nut as well and he suggested the CobraJet heads and said they would be about the same money as having my existing heads all ported and redone.

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    I had a Sanger Super Jet with the same set-up. Built the 460 to just under 500hp and had pump work done. The Sanger is a heavy lay-up boat and you should be very happy with 67mph. The best I got was 74mph with built motor and pump, droop, and place diverter. If your going to do the same up grade, flip the boat over and blueprint the bottom. Mine had a lot of rocker in it that produced a porpoise at top speed which was due to the bottom. I put the same motor in my CP and GPS 84mph, spinning a tight pump, with SS AB impeller to 5300rpm.

    I loved that Sanger. Its a great boat. But it is going to take you a lot of work and money to get it in the 80's.

    Talk with LakesOnly. He can be a great help.

  13. #11
    Senior Member Dominator Scott's Avatar
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    Quote Originally Posted by cp562 View Post
    I had a Sanger Super Jet with the same set-up. Built the 460 to just under 500hp and had pump work done. The Sanger is a heavy lay-up boat and you should be very happy with 67mph. The best I got was 74mph with built motor and pump, droop, and place diverter. If your going to do the same up grade, flip the boat over and blueprint the bottom. Mine had a lot of rocker in it that produced a porpoise at top speed which was due to the bottom. I put the same motor in my CP and GPS 84mph, spinning a tight pump, with SS AB impeller to 5300rpm.

    I loved that Sanger. Its a great boat. But it is going to take you a lot of work and money to get it in the 80's.

    Talk with LakesOnly. He can be a great help.

    I will never sell the Sanger since it used to be my dad's boat and he absolutely loved it. When he passed away 18 months ago it was handed down to me so there is a lot of sentimental attachment to the boat.
    It already has the droop,place diverter and loader grate and it does run strong for what it is. I might just freshen up the motor and get the HP to around 500HP and be happy with whatever I get. Or I may just throw a bigger cam and lifters in it and call it a day. If I want the 100MPH ride I just have to hook on to my 32 Sunsation with twin 700SC's and head for the the big water.

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