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Messages - GT Jets

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1
I'm new to this forum and i have an unstoppable passion for my Jet boat... Currently i have a nasty vibration which i think is coming from the drive shaft which is only 6.5" long (hopefully not the motor).  It doesn't have a PTO on the 460, it's mounted directly to the flywheel/crank shaft.  I've replaced the u joints multiple times and i still have a slight mechanical bind of some sort.  I think the yoke is messed up somehow.  I've replaced the thrust bearing and impeller/sleeve already which didn't help.  I've even removed the bowl and impeller to help trouble shoot and eliminate that part of the drive line. I have the splicer kit 1310 on order with the adapter plate for the 460 bolt pattern, but that makes the drive shaft 2" longer at 8.5" total.  How can i support the rear part of the motor now? it was mounted on the bearing block assembly before.  Also I've had a hard time trying to get the motor mounted at the correct angle.  My understanding is that the engine should be about 1 to 2 degrees off not straight on.  With that said, the oil pan drain plug area hits the bottom of the boat.  I've had this boat for about 1.5 years now and I've replaced the stringers, floor and interior last winter.  It ran great for the first month then i noticed a slight vibration which turned really bad really quick.  Any guidance would be appreciated thanks. (Ford 460 big block with a Berkeley 12JE)
Your information is flawed?

The engine should be nearly dead nuts with only a slight parallel offset. ANY difference in final angle will play havoc with harmonics and driveline vibration.
The parallel offset should not net more that a degree of joint deflection, but not less than 1/2 a degree for joint bearing lubrication and dynamic tightening.



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2
Random Boat Parts For Sale / Re: FOR SALE!!
« on: October 04, 2019, 06:11:32 PM »
Anyone need these, all you need is the switch. Make offer

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$100?

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3
Engine Mechanical / Electrical / Re: Oil pressure gauge
« on: August 25, 2019, 10:02:44 PM »
If its a short between the gauge and sender what exactly does that mean? A broken wire? I hate electrical  :banghead:
Grab a length of wire and run it from the sender to the gauge bypassing the existing wire.

Sounds like the existing wire is pinched or shorted to another wire.

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4
Engine Mechanical / Electrical / Re: Oil pressure gauge
« on: August 25, 2019, 05:34:12 PM »
What gauge and what does the sender look like?

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5
Interior / Re: Marine plywood?
« on: April 07, 2019, 01:16:18 AM »
Interior question...if im going to resin coat the plywood for my seat bases doni need marine plywood?

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No sir. Use CDX.

The difference is that every single ply has the knot holes filled so there are no voids through the whole thickness.

Same exterior glue as CDX.

If you are going to coat it with resin, do a hot coat first, simply thin the resin with MEK or acetone to make it watery. Then do a normal viscosity coat on that. It soaks in much further and lasts forever.

I like to buy sanded one side of I want it to be pretty...

Good luck brother.

GT

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6
The No Wake Zone / Re: GoPro Hero4 Silver
« on: January 10, 2019, 12:42:59 AM »
Interested if it's still available.

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Sorry brother. I picked it up....

GT

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7
WTB / Re: Bbc headers
« on: January 09, 2019, 09:21:00 PM »
Does anyone have a old set of bbc headers? They can  be dented, rusted. Totally something someone would never put back on a boat. Im looking for a pair to run on a test stand. So they might get used 1 or 2 times a year. If so let me know what u got. Thanks steve

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I have a set for cheap, where are you located?

GT

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8
WarZone / Hate mail.
« on: January 09, 2019, 05:36:37 PM »
I'll let you determine whom it came from... Lol

GT

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9
Jet Pumps / Re: What impeller ?
« on: January 06, 2019, 08:29:26 AM »
Well... My dream was to run 90..i know Ive probably lost my mind.. Thats what i hear for other half anyway.. Im beginning to realize its not gonna happen with this motor.. Ugh
I like the old school v8 sound/ trying to stay away from buying a weed wacker.
Ill have to search for someone running same boat/bottom and start over i guess.. Know anyone running 85-90 with one... Thanks
90 isn't at all unrealistic. It did however depend on how far you want to run 90.

Touching 90mph and driving for miles at 90mph are two different animals.

My Renegade ran 85mph for a long as you had your foot in the gas, but was a bit sketchy to drive when compared to the aluminum tunnel hull or our deep V cruiser.

If you just want to run it for a half a mile, I think your platform is a good one.

If you look at your dyno sheet you can see where your carburetor held you back.

Put it into a graph and it will be obvious.

The horsepower curve tapers off.

GT

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10
The No Wake Zone / Re: GoPro Hero4 Silver
« on: January 05, 2019, 11:44:49 AM »
Yes sir. Paypal and Venmo. We can PM our info

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Done.

GT


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11
The No Wake Zone / Re: GoPro Hero4 Silver
« on: January 05, 2019, 10:53:00 AM »
Forgot about this thing.....80 bucks plus shipping or just call it 90 total with shipping

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I figured you sold it (been in and out of surgery three times).

Do you PayPal, pal? Lol

LMK..

GT

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12
Jet Pumps / Re: What impeller ?
« on: January 05, 2019, 10:21:42 AM »
When i have them dyno with bigger carb, wonder if it would be worth changing cam to 106lsa or 108 to bring peek down, my other 514 peaks at 5500 but cant find that cam card.
Im keeping this boat,  selling southwind some day. Id like to push this one as hard as i can. Limits to delta bottom speed?has port matched victor. ..took me awhile to figure out how to reply.. Lol ...waiting to sell the existing 460 with 5hrs on it before pulling for new
You could swap the cam, but to what end? Your carburetor likely starved the engine for air at about the 5,000 rpm mark. A carburetor is rated at .5" vacuum at the plate. You are shooting for much closer to atmospheric pressure.

In all honesty, the member you need to message is Joe (flusher). He could probably get you headed down a logical path that will be both fiscally and mechanically sound...

GT

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13
Jet Pumps / Re: What impeller ?
« on: January 04, 2019, 11:53:26 PM »
You're too easy.  ;D


He's sort of loose that way... It's a Ford thing.

GT


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14
Jet Pumps / Re: What impeller ?
« on: January 04, 2019, 04:05:53 PM »
Newbie,  sorry if i have posted in wrong place... My first post/cherry popped ect.. . Ive lurked and read almost every post for months. Butt.. Figured id just join and ask.. I will not be building my own pump- itll be ss but should i shoot for 9.5 and hope to pull 4700 or b/c and hope for 6500
Eliminator, bubble, 18'full stringer, no floor..530 bbf engine was tested exactly like it will be in boat..engine guy thought it was for prop boat :banghead:.should i have cam changed to shoot for max tq/lower rpm ..solid roller now
carb was only 750,  if cam change ill take dom carb off other boat and test.
Didnt want to call a pro shop yet and get stuck with salesman- not a tech ect
Whew that took me forever to type,  thanks

Any chance you can dyno with a bigger carburetor? The 750 is stupid short. You are deep into 950HP territory.

With the numbers you currently have, I would go with a stainless A and keep the RPMS down in the 5,300 RPM range, but I feel there is more left in that deal with more air. It is very difficult to over carburate a jet boat engine...


JMHO, if stuck with an as is, I would run an A, you simply don't have the torque numbers to pull a 9.5"

GT

15
Engine Mechanical / Electrical / Re: 496 Eddie Built
« on: January 03, 2019, 11:57:02 AM »
She made 741hp thank your Eddie


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Holy chit....

GT

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16
Engine Mechanical / Electrical / Re: Petcocks
« on: December 31, 2018, 02:02:04 PM »
Do you guys have petcocks in place on your motors? I'm replacing a 454 with a another and the original motor has them installed. I've never had them on previous boats and would appreciate your thoughts.

I live in Mohave Valley, AZ and the boat will be stored inside in a climate controlled environment.

Thanks for your help
I feel they plug up much to easily.

I just use hex headed brass plugs.

JMO

GT

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17
Engine Mechanical / Electrical / Re: 496 Eddie Built
« on: December 30, 2018, 07:27:44 AM »
Touch 700...

GT

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18
Hulls / Re: Bahner hulls
« on: December 28, 2018, 05:55:13 PM »
Which hull?

Their boats were much better than their business practices...

As good as anything else out there in my opinion, I've owned two.

GT

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19
The No Wake Zone / Merry Christmas and Happy New Year!
« on: December 24, 2018, 02:03:43 PM »
I want to take a moment and wish all my boat loving brethren a very joyous Holiday Season.

I'm actually counting down the days until 2018 ends. One hell of a year it's been, the roughest in my life thus far.

I hope you all find yourselves looking forward to 2019, are healthy, happy and most important with the ones you love.

Cherish every moment, your life can change at the click of a switch.

See you guys and gals on the other side.

GT

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20
WarZone / Re: Just smack talk
« on: December 23, 2018, 03:08:16 PM »
Lmfao GT , good to have u back bro hope ur on the mend


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Thank you brother, getting a little better every day.... Be back to doing shit wrong very soon.

GT

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21
WarZone / Re: Just smack talk
« on: December 23, 2018, 08:36:49 AM »
Hmmmmm ok lover , call me aqua on 1-800-Chevy-guy lol


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So I called the number, I got some dude with a heavy lisp asking about couples massage with a special on happy endings.... Weird... 


Lol...

GT

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22
Project Boats For Sale / Re: Marine Craft “sprint splash”
« on: December 22, 2018, 06:28:54 PM »
Do you know if it had the thing to turn on the rooster?


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It do indeed.

GT

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23
Project Boats For Sale / Re: Marine Craft “sprint splash”
« on: December 21, 2018, 02:29:49 PM »
$3,500 I believe

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Funny, I see it now, but I'll be dammed if it was there before... Lol

GT

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24
Project Boats For Sale / Re: Marine Craft “sprint splash”
« on: December 21, 2018, 01:53:26 PM »
Very nice boat, I would like to purchase this bad ass float it everyone else is to blind to see the amazing deal here!!!!


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A little difficult to make that determination without knowing the price... If I'm not being too obtuse.

GT

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25
Test / Re: Transom wash over guard
« on: December 20, 2018, 08:20:01 PM »
I've owned at least a dozen jet boats. Never had a wash over issue on any of them.

To answer your question, most acrylic and plastic shops can help you with this. It's quite a simple process. I've made several windshields.

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