SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: 2savage4you on October 08, 2008, 08:42:33 AM

Title: Marine clearances
Post by: 2savage4you on October 08, 2008, 08:42:33 AM
For a stock BB chevy with cast pistons.

 I need to know what the piston to wall should be and the main and rod journal clearances..

And ring end gap . Thanks.   Ok here's another one. When adding a new balancer and HD flexplate , do you have to rebalance the rotating assembly ?



Soooooooo give me some tech advice first , and then talk your shit  ;)
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 08:56:24 AM
Whoops, just realized i posted in the wrong section.Sorry
Title: Re: Marine clearances
Post by: Brad @ SCJB on October 08, 2008, 09:33:45 AM
Whoops, just realized i posted in the wrong section.Sorry

youre in the right place now  ;)
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 09:39:47 AM
youre in the right place now  ;)

Thanks Brad...... :-*



 :D
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 09:50:12 AM
rule of thumb .001 for every inch of journal. piston and ring should be whatever the manufacture wants
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 09:52:12 AM
rule of thumb .001 for every inch of journal. piston and ring should be whatever the manufacture wants

How can i find out what the manufacture recommends on stock cast used pistons

I checked piston to wall clearance with a feeler guage and it showed .oo5 - .006 I know its not very accrurate but its all i had :D
Title: Re: Marine clearances
Post by: beerjet on October 08, 2008, 11:01:37 AM
Those used cast piston life expectancy wont be very long in a "marine" application . I really dont think they are up to the task .

-beerjet-
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 11:05:53 AM
Those used cast piston life expectancy wont be very long in a "marine" application . I really dont think they are up to the task .

-beerjet-
x2
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 11:41:32 AM
Those used cast piston life expectancy wont be very long in a "marine" application . I really dont think they are up to the task .

-beerjet-

Well unless i find a decent used engine...........

I got to do , what i got to do
Title: Re: Marine clearances
Post by: beerjet on October 08, 2008, 12:07:35 PM
I think better money spent would be to buy forged pistons on the stock rotating assembly . (https://www.socaljetboats.com/cpg/albums/userpics/10034/twocents.gif)

-beerjet-
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 12:30:08 PM
I think better money spent would be to buy forged pistons on the stock rotating assembly . (https://www.socaljetboats.com/cpg/albums/userpics/10034/twocents.gif)

-beerjet-

And that means more money spent on machine work..

I can't explain my situation , but its not good at this point..... and i might have to take the easy way out :mad:
Title: Re: Marine clearances
Post by: beerjet on October 08, 2008, 12:54:44 PM
You know what , your plan doesnt sound wrong . Your motor is not going to explode and level Bullhead . As long as your nice to it and try not to hot rod it too much , it'll hold up a while . At least until you get some money for some better pistons and get your ducks in a row so to speak . Of course we dont know your situation and if this is what your have to do , this is what you have to do .

With the cast pistons , they will expand more than a forged will . Try and get a recomondation for the piston and ring clearances from the manufacture , and remember to be nice to it  ;D

-beerjet-
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 02:15:56 PM
Yeah, thats the hard part . Be nice to it...... I know i will run it hard and treat it like my G/F :banghead:
Title: Re: Marine clearances
Post by: blackbeard on October 08, 2008, 02:48:42 PM
easy way to remember to be nice to it. don`t treat it like your girlfriend, treat it like your mother. lol.
Title: Re: Marine clearances
Post by: HDriderTH on October 08, 2008, 02:55:32 PM
Here ya go 2sav:


http://lasvegas.craigslist.org/pts/871705844.html
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 03:21:40 PM
Here ya go 2sav:


http://lasvegas.craigslist.org/pts/871705844.html

Terry call that MO fo  :D



Seriously :sly:
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 03:48:28 PM
no money this time, but always money to do it rite the 2nd :banghead:
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 04:04:51 PM
no money this time, but always money to do it rite the 2nd :banghead:

Ralph are you saying that its not a good idea to buy that set up ???
Title: Re: Marine clearances
Post by: HDriderTH on October 08, 2008, 05:16:50 PM
Whatchu wanna know?
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 05:23:58 PM
Ralph are you saying that its not a good idea to buy that set up ???


How about this one.
http://www.cnc-motorsports.com/cart.asp
sorry didn't even click the link till now, looks good to me but what i know is you still have to check all parts used/new. then go to the machine shop and have them fixed. :-\ come on sav new pistons are what 500 bucks ???
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 05:25:00 PM
depending on the deal, omars engine took a beating and never stopped
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 05:25:13 PM
Whatchu wanna know?

YOU KNOW THE QUESTIONS TO ASK BETTER THAN I DO........ AND GET IT DOWN LOW.......


YES IM YELLING......HE'S A HUNDRED MILES AWAY  :D
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 05:26:56 PM
depending on the deal, omars engine took a beating and never stopped

Yeah i tried to buy it but no way to get it
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 05:32:49 PM
Yeah i tried to buy it but no way to get it
come on brother :'( some body from out this way is always going to the river :-*
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 05:37:32 PM
come on brother :'( some body from out this way is always going to the river :-*

Well then lets find that person , and get me a engine.........


Then i will leave you guys alone ::)


 :sly:
Title: Re: Marine clearances
Post by: OC2Vegas on October 08, 2008, 06:06:36 PM
Well then lets find that person , and get me a engine.........


Then i will leave you guys alone ::)


 :sly:

People are going that way for the Enduro's in Parker
Title: Re: Marine clearances
Post by: HDriderTH on October 08, 2008, 06:06:50 PM
Here ya go:

http://lasvegas.craigslist.org/pts/871965516.html
Title: Re: Marine clearances
Post by: Ralph Brunt on October 08, 2008, 06:23:31 PM
People are going that way for the Enduro's in Parker
thats what im saying ;)

Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 06:23:52 PM
Terry , check yo pm  ;)
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 06:24:44 PM
People are going that way for the Enduro's in Parker

Called on the craiglist deal....................


It might be the one for me :D
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 06:28:39 PM
Im gonna need some 049 heads  or run e85 ???

With my heads i will be at 13:1 approx
Title: Re: Marine clearances
Post by: HDriderTH on October 08, 2008, 06:41:12 PM
SWEET
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 07:03:42 PM
SWEET

Yeah and i want it.......................... ;D
Title: Re: Marine clearances
Post by: OC2Vegas on October 08, 2008, 07:29:41 PM
Im gonna need some 049 heads  or run e85 ???

With my heads i will be at 13:1 approx

E85 is under 3 bucks a gallon in Vegas!
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 07:31:33 PM
E85 is under 3 bucks a gallon in Vegas!

Here too  ;D
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 07:52:46 PM
People are going that way for the Enduro's in Parker

When is the Enduro ?
Title: Re: Marine clearances
Post by: OC2Vegas on October 08, 2008, 07:56:56 PM
When is the Enduro ?

http://www.socaljetboats.com/index.php?topic=5169.0 (http://www.socaljetboats.com/index.php?topic=5169.0)
Title: Re: Marine clearances
Post by: 2savage4you on October 08, 2008, 08:01:12 PM
http://www.socaljetboats.com/index.php?topic=5169.0 (http://www.socaljetboats.com/index.php?topic=5169.0)

Thanks ;)
Title: Re: Marine clearances
Post by: HDriderTH on October 08, 2008, 08:37:59 PM
Here too  ;D

Ya gotta run 20-30% more of it tho...good octane i hear
Title: Re: Marine clearances
Post by: 2savage4you on October 13, 2008, 06:30:18 PM
 ::) ::) ::) ::) ::) ::) ::) ::)






 :D


Can you guys figure it out :sly:


















i didn't think so O0
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