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coors909

  • Karma: +6/-0
BBC heads
« on: November 08, 2015, 08:56:28 PM »
I wanted to know which number tells me what heads I have?  These are the numbers I found gm11T or A2170


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GT Jets

  • Karma: +192/-0
Re: BBC heads
« Reply #1 on: November 08, 2015, 10:42:49 PM »
Quote from: coors909 on November 08, 2015, 08:56:28 PM
I wanted to know which number tells me what heads I have?  These are the numbers I found gm11T or A2170


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Probably foundry and a date.

The number you want to use for identification is the casting number. Typically cast into the head under the valve cover.

GT
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Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

coors909

  • Karma: +6/-0
Re: BBC heads
« Reply #2 on: November 09, 2015, 06:38:32 AM »

Quote from: GT Jets on November 08, 2015, 10:42:49 PM
Probably foundry and a date.

The number you want to use for identification is the casting number. Typically cast into the head under the valve cover.

GT

Ok. Those were the two numbers on the head under the valve cover. Maybe there is another one under there somewhere


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GT Jets

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Re: BBC heads
« Reply #3 on: November 09, 2015, 07:03:52 AM »
Are they GM heads?

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Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

crewchief22

  • Karma: +66/-0
Re: BBC heads
« Reply #4 on: November 09, 2015, 06:32:38 PM »
Going to be a 6 or 7 digit number.  Two very common cylinder heads found on Jet boats are 353049 oval port and 6272990 rectangle port.
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coors909

  • Karma: +6/-0
Re: BBC heads
« Reply #5 on: November 09, 2015, 07:00:00 PM »
3964290 is what I have


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GT Jets

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Re: BBC heads
« Reply #6 on: November 09, 2015, 07:25:18 PM »
Quote from: coors909 on November 09, 2015, 07:00:00 PM
3964290 is what I have


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3964290....69-70...oval..CLOSED..396, 402, 427, 454, 101cc chamber
Large or small hex spark plugs used.
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Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

brian777

  • Karma: +3/-0
Re: BBC heads
« Reply #7 on: November 09, 2015, 08:47:50 PM »
What are 6272292?


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GT Jets

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Re: BBC heads
« Reply #8 on: November 09, 2015, 09:10:07 PM »
Quote from: brian777 on November 09, 2015, 08:47:50 PM
What are 6272292?


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Lol


6272292....70-78...oval...OPEN...402, 454
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Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

brian777

  • Karma: +3/-0
Re: BBC heads
« Reply #9 on: November 09, 2015, 09:18:33 PM »

Quote from: GT Jets on November 09, 2015, 09:10:07 PM
Lol


6272292....70-78...oval...OPEN...402, 454
thanks gt so are these worthless like the rest of my motor?😭


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GT Jets

  • Karma: +192/-0
Re: BBC heads
« Reply #10 on: November 09, 2015, 09:50:36 PM »
Quote from: brian777 on November 09, 2015, 09:18:33 PM
thanks gt so are these worthless like the rest of my motor?😭


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Not necessarily worthless.

Good heads for low rpm range horsepower. Would respond well to a good RV grind cam if your compression ratio was high enough (thinking 9.5:1).

For the demands of a jet pump, probably not the right head. Work good in an I/O.

GT
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Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

brian777

  • Karma: +3/-0
Re: BBC heads
« Reply #11 on: November 09, 2015, 09:52:32 PM »

Quote from: GT Jets on November 09, 2015, 09:50:36 PM
Not necessarily worthless.

Good heads for low rpm range horsepower. Would respond well to a good RV grind cam if your compression ratio was high enough (thinking 9.5:1).

For the demands of a jet pump, probably not the right head. Work good in an I/O.

GT
ok I'll toss them in the scrap pile too!


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69kona

  • Karma: +13/-0
Re: BBC heads
« Reply #12 on: November 10, 2015, 06:58:14 AM »
I'll take them ..lol


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Six-Oh-Nine

  • Karma: +28/-0
Re: BBC heads
« Reply #13 on: November 10, 2015, 09:17:40 AM »
Quote from: brian777 on November 09, 2015, 09:52:32 PM
ok I'll toss them in the scrap pile too!


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Well since you're gonna scrap them out because they are "worthless"... I'll take your junk and make it a little treasure for someone else... Thanks for the donation! Where can I pick them up? :thumbup: :thumbup:
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The Bostick ®

Some people play hard to get, I play hard to want.

69kona

  • Karma: +13/-0
Re: BBC heads
« Reply #14 on: November 10, 2015, 12:30:07 PM »

Quote from: Six-Oh-Nine on November 10, 2015, 09:17:40 AM
Well since you're gonna scrap them out because they are "worthless"... I'll take your junk and make it a little treasure for someone else... Thanks for the donation! Where can I pick them up? :thumbup: :thumbup:

That's what I'm saying I take them "worthless " heads lol


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Six-Oh-Nine

  • Karma: +28/-0
Re: BBC heads
« Reply #15 on: November 10, 2015, 05:12:35 PM »

Quote from: 69kona on November 10, 2015, 12:30:07 PM

That's what I'm saying I take them "worthless " heads lol


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I've made some decent power on jet boat motors with those "worthless" heads... So I'll take all of them out of everyone's trash barrel! Lol!


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The Bostick ®

Some people play hard to get, I play hard to want.

rush1

  • Karma: +18/-0
Re: BBC heads
« Reply #16 on: November 10, 2015, 06:59:49 PM »
I'm looking for a set of those heads
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brian777

  • Karma: +3/-0
Re: BBC heads
« Reply #17 on: November 10, 2015, 07:26:43 PM »
Well these r pretty good heads if matched with the right Pistons to create higher compression they cc at 110 just not big enough for the power I want might be up for sale soon


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Towtruk69

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Re: BBC heads
« Reply #18 on: November 10, 2015, 07:27:20 PM »
I have a pair of 049 heads that need to be rebuilt if anyone is interested. $50
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coors909

  • Karma: +6/-0
Re: BBC heads
« Reply #19 on: November 10, 2015, 09:21:44 PM »

Quote from: Towtruk69 on November 10, 2015, 07:27:20 PM
I have a pair of 049 heads that need to be rebuilt if anyone is interested. $50

Where are you located?


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Towtruk69

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Re: BBC heads
« Reply #20 on: November 10, 2015, 09:32:27 PM »
Fontana
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