SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: jetjunky101 on May 23, 2016, 04:55:36 PM
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I was under my trailer re wiring my lights that seem to go out all the time so upgrading to double insulated wire . So I was under the intake and I see this . Is this a loader and if so is it a good one bad one . And luckily I took a look because 2 bolts are completely gone and 2 are on there way out . Next what should I do to fix this . I know it's probably been said before but I am not sure if it's through bolted or not . I'll have to take a better look on the inside.
Thanks in advance for any help .
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Genuine Berkeley issue rock grate.
They are not through bolted from Berkeley. The 'pad' where it bolts to, is where a loader would bolt.
It is recommended to through bolt loaders, and replace the stainless bolts with larger grade 8 black oxide bolts and lock nuts.
And check grates and loaders before every trip out.
Through bolting the rock grate is a good idea, but oil pan clearance might make it difficult with the engine still in the boat.
Dan'l
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Awesome .. thanks for the info . Just glad I caught it before it made for a bad day on the water .
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I still run a rock grate but have a preloader, stuffer, 9 vane, diverter an plate/shoe.
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what are the advantages of the loader?
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what are the advantages of the loader?
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Keeping the pump loaded
You asked :screwy:
Dan'l
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what are the advantages of the loader?
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Well, look at it this way.
The rock grate is literally designed to keep things out.
The impeller is designed to pull in and expel water, so do the math.
The loader helps feed the eye of the impeller making it capable of moving that much more water. More water out, more performance realized.
GT
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Well, look at it this way.
The rock grate is literally designed to keep things out.
The impeller is designed to pull in and expel water, so do the math.
The loader helps feed the eye of the impeller making it capable of moving that much more water. More water out, more performance realized.
GT
So I can just keep my rock gate and do the bolt repair and I should be fine .
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So I can just keep my rock gate and do the bolt repair and I should be fine .
Hmmmmmm. Sure.
Let me back up a little.
What hull, how much power, what to you want from the boat, is performance gain even a concern?
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Should I have this one cleaned up or is it time to pitch it ? I'm not sure . The welds look bad to me ...
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Hmmmmmm. Sure.
Let me back up a little.
What hull, how much power, what to you want from the boat, is performance gain even a concern?
I'll bring it too you this weekend. .. stock BBC 12 jg a aluminum impeller ... 19' 86 commander.
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This is it
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Should I have this one cleaned up or is it time to pitch it ? I'm not sure . The welds look bad to me ...
My answer will virtually always be the same.
If you are going to dick with repairing bolts, pulling the grate and question what's already under there, buy a loader, through bolt it with hardened hardware and have fun.
In most cases, the added performance can be felt just by the seat of the board shorts.
Remember it needs to be trimmed to fit properly and must be through bolted.
JMHO.
GT
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Hmmmmmm. Sure.
Let me back up a little.
What hull, how much power, what to you want from the boat, is performance gain even a concern?
no .performance gain is not a issue at this point
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I found it before it became a problem. .
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hardened bolts vs grade 8?
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If two bolts were missing and two were on their way out, I'd say that more likely than not the threads in the intake have been compromised. Your best best is to drill and tap the holes to 5/16 and through bolt a loader on. Not only is it the safest option but u get a performance gain out of the deal 🤘🏼🤘🏼🤘🏼
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hardened bolts vs grade 8?
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Black oxide Allen is what I use. ASTM F835 is the rating.
Where are you finding grade 8 flat headed Allen bolts?
Virtually all Allen bolts are hardened and heat treated.
GT
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I could just grab grade 8 hex heads, not allens. didn't know if there's a huge difference or if I could use them
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I could just grab grade 8 hex heads, not allens. didn't know if there's a huge difference or if I could use them
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The loader has tapered holes. Hmmmm, wonder why?
Lol
GT
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Gt sorry if it's a stupid question but ..
Do Allen bolts have tapered threads?
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Gt sorry if it's a stupid question but ..
Do Allen bolts have tapered threads?
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The holes in the loader are countersunk- or tapered
Allen bolt treads are not tapered
Dan'l
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The holes in the loader are countersunk- or tapered
Allen bolt treads are not tapered
Dan'l
8)
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Ok cool thank you.
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So what type of loader should I be looking for . What would be the best for a stock BBC 19 ft cruiser ?
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Either a Super Sport (CP, B1 Racing, Berkeley Pump) or if you can find one, a GTH.
GT
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MPD makes loaders as well. 👍🏻👍🏻👍🏻
Sent from McIntyre Park
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MPD makes loaders as well. 👍🏻👍🏻👍🏻
Sent from McIntyre Park
8)
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Sheet rock screws it is ... done deal...
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Ok .. so say a fella had an issue with his stock berkeley rock gate and didn't want to spend 200 + on a loader and the hardware.
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In your situation I would drill the rock grate mounting holes out to 5/16 and recountersink the holes to accept the larger counter sunk bolts and drill and tap the intake to 5/16 as well.
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A loader is probably one of the biggest bang for your buck performance parts. I wouldn't waste my time with the rock grate, but the above option is the best way to fix what u have though.
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A loader is probably one of the biggest bang for your buck performance parts. I wouldn't waste my time with the rock grate, but the above option is the best way to fix what u have though.
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Well said sir.
Rock grates are to keep 100% of the potatoes out of the pump, unfortunately, they also keep out about 20% of the water.
GT
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Hi Folks. Long time no post. No boats anymore but getting the itch. I do however fix some stuff here and there. I did this to an intake when it was out of the boat. You can do it however on your back and be careful with the drill and tap. Yes 5/16-18 black oxides work well. I do however wonder if the "bumps" can be spot faced a little to gain more clearance for the oil pan. This will also allow you to put a captured safety nut on the top. I do not use nylock nuts for this situation. I use nuts that utilize deformation to utilize the locking set up. McMaster has these nuts.
Ok so getting anything flat and square on these intakes is a joke.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.tjsperformance.com%2Fimages%2Fberk_intake_16.jpg&hash=b10730d83fb9a6a216b11cabafaae04304a04c47)
I tap on my mill and finish by hand with these drivers
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.tjsperformance.com%2Fimages%2Fberk_intake_17.jpg&hash=6a0273aaed6bf797bdd5413c55b8d87f04df0657)
Here is what I am talking about maybe spot facing these "bumps" down a litte and putting a lock nut on top for added security.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.tjsperformance.com%2Fimages%2Fberk_intake_18.jpg&hash=bb41e48aabd9650264a0282eb76ef417521d7c56)
These are the bolts that I use.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.tjsperformance.com%2Fimages%2Fberk_intake_19.jpg&hash=ee469858f05867e868bab74a12951ad598260356)
Here is my jet pump intake Jig.
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.tjsperformance.com%2Fimages%2Fberk_intake_20.jpg&hash=d3bbc9d8b0fae9b5bab8b35017941a586c30707c)