SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: muffbro on April 25, 2014, 07:38:29 PM
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pulling the motor in the AM.
I am going to check the bottom end and RR the freeze plugs....it will give me a chance to see what's in the motor.
Hopefully nothing is hurt and I can clean it up repaint it as well as put a
new timing cover on it ( the current one leaks a little)
The pump is going to ship to Central Texas Jet-boat for a rebuild.
mobile
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The pan was clean.... no sludge... no metal. I may not have needed to disassemble it...but I had it out and wanted to make sure.
I'm going to have the motor hot tanked and tested ..... heads will be pressure tested and checked, I'll pull the cam tomorrow and find out what it is
I knew the intake was old.....but it's nearly as old as me LOL.......
dated 11-65....
mobile
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here's where the questions start.
I have identified most of the internals
it's a 4 bolt with a steel crank, 3521 (that from what I have read online is a good one). slightly domed .30 over pistons / 990 heads and a 3885069 GM intake manifold dated 11-2-65;
Carb is a 3310-1 - 780 Holly
I'll have cam specs in a day or two ..
I am looking for direction on the intake.
I was thinking about selling the current intake and replacing it with something newer...... I see a lot of mention of Vic Jr's......
opinions????
I ask only since this
manifold is almost 50 years old, and newer ones must have better flow characteristics right?
mobile
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I was thinking about selling the current intake and replacing it with something newer...... I see a lot of mention of Vic Jr's......
opinions????
I ask only since this manifold is almost 50 years old, and newer ones must have better flow characteristics right?
You definitely won’t go wrong with a Vic Jr. and a single-plane intake could add a few HP at WOT without the need for low-RPM torque of a dual-plane in a jet boat. You might take a look at some of the new offerings from Edelbrock, not that the Vic Jr. is a bad intake, but it is now a 30+ year old design also.
Weiand Team G is also a good manifold if you can get a good deal on one.
Realistically, if you are not spinning your engine above 5500, you may never notice a difference between a single-plane and a dual-plane. You might also consider an AirGap RPM.
You should be able to find some good deals on some used Vic Jr. and Team G intakes, or even a trade plus some cash from a resto guy for your current intake.
Cheers,
Joe
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I like the weiand stealth as well.
A really good performing dual plane.
-beerjet-
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Being as this deal pushed a plug and you're going to pull it down anyway, have it Magnafluxed....
GT
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The bearings looked good, as does everything else.
I've never built an engine, but I'm stoked about doing it.
I now know what I have so far as the components. I'm hoping to sell the intake I have and get a Wieand Stealth intake and a different cam.
The one I just pulled is a Clay Smith unit; I called them to find out the specs and the girl that answered the phone had me talk to a guy named George....we talked about jetboats ( he said he has one) and what I wanted for my boat, he was very cool and we spoke for about 30 -40 minutes. he told me he used to "race a little" both cars and jetboats and had to stop after he had a bad wreck.....he gave me a recommendation for a little hotter cam and told me to call him back after I had the heads tested and checked the springs.
I didn't realize until after I had hung up and went online and did some reading about Clay Smith cams that it was the owner George Striegal I had spoken to!
I was surprised at the time he spent with me, he acted like we were old friends. very cool..... very classy.
I'm taking the heads and block tomorrow for hot tank, magnaflux, and pressure test.....New freeze plugs etc.
Also to pressure test the heads, check the springs as well. I'll be able to have a fresh motor and after I get the pump back I'm hoping to get it up and running before the end is the season.
I want to thank everyone here for the suggestions and help that has been given. I've learned a lot and appreciate it. Perhaps next year a trip out west will be in order.
mobile
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George is the man! I just picked my heads up from them....
And wow! Such good customer service.
I wonder if your who he was talking to when I left. Of course I went in rocking the SCJB hat.. Got some conversation with them out of it. Glad yours is coming together good dude! I'll stay tuned
Sent with my Fingers
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George will do you right, he specd out my valve train and cam and it's running pretty good :)
Sent from my SAMSUNG-SGH-I337 using SoCal Jet Boats mobile app
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My first motor had a Clay Smith 304b mechanical cam and a stealth intake.
There is very little in this world I miss more than that motor....
-beerjet-
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I'm leaning toward that same intake....
mobile
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I am looking at replacing my current set up for roller gear..... anyone familiar with this???
mobile
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roller gear will
have to wait until next year... I'd have to retro-fit everything and it's about a grand..... soooooo I bought new valve springs/ lifters & rockers and a little hotter Comp cam.... gonna try and get it done by next Tue/ Wed. of. course it's going to be perfect weather this weekend.... mid 90's
mobile