WTF is this ?

« **on:** September 17, 2008, 08:18:32 PM »

First time I've ever seen this

-beerjet-

« **Reply #1 on:** September 17, 2008, 08:25:03 PM »

Them be straight cut gears. No timing chain, just gear to gear mesh, keeps your timing in check.

« **Reply #2 on:** September 17, 2008, 08:26:32 PM »

arent these the gears that make some random kind of 'whine' when on the throttle?

Reid

« **Reply #3 on:** September 17, 2008, 08:27:48 PM »

Quote from: Luckie Stiff on September 17, 2008, 08:25:03 PM

Them be straight cut gears. No timing chain, just gear to gear mesh, keeps your timing in check.

Actually angle cut gears and the top gear has GM casting numbers .

-beerjet-

« **Reply #4 on:** September 17, 2008, 08:32:38 PM »

Right ~~Left~~ hand rotation engine.....

Cam goes same direction, crank, she go backwards...Common in older twin engine boats, one is counter-rotating..

Edit, I mean right........

« **Reply #5 on:** September 17, 2008, 08:33:30 PM »

Nice gear drive, what kind of other goodies are you going to find in that motor.

« **Reply #6 on:** September 17, 2008, 08:33:48 PM »

Where the hell did you find that?

« **Reply #7 on:** September 17, 2008, 08:35:46 PM »

In 76 bonnevilles new block

-beerjet-

« **Reply #8 on:** September 17, 2008, 08:52:22 PM »

The way things are looking, maybe you should sell me the complete short block.

« **Reply #9 on:** September 17, 2008, 09:02:06 PM »

You could mount it in your jetboat, but will need to run the power through a vee drive...

Here is what you gots...

Good motor, just don't use the rear main, starter, front seal, timing set, otherwise your golden

http://www.ebasicpower.com/c/MER6Y/Timing+Kits+for+Mercruiser

« **Reply #10 on:** September 17, 2008, 09:09:51 PM »

GT, are you saying this motor came out of a twin engine v-drive, and this is the counter rotating motor?

« **Reply #11 on:** September 17, 2008, 09:25:36 PM »

Quote from: 76 Bonneville on September 17, 2008, 09:09:51 PM

GT, are you saying this motor came out of a twin engine v-drive, and this is the counter rotating motor?

Reverse rotation engine from an inboard...

« **Reply #12 on:** September 17, 2008, 09:54:35 PM »

Quote from: 76 Bonneville on September 17, 2008, 08:52:22 PM

The way things are looking, maybe you should sell me the complete short block.

Asking price is getting harder and harder to come up with . I dont know if this makes it worth anymore but it sure is going to make performance parts alittle harder to come I think .

-beerjet-

« **Reply #13 on:** September 17, 2008, 10:03:42 PM »

Do you have any history on this engine?

I thought I remember GM using a reverse rotation cam (gear to gear) in a tall deck 366/427 big block truck motor in the late 70's, early 80's.

Let me see if I can find anything to verify it.

« **Reply #14 on:** September 17, 2008, 10:20:53 PM »

Looking at the gears on that motor, that does look like a lefty, still not sure though the helical cut gears look wrong for a revers rotation motor, then again, I had three drinks with my tri-tip and taters...

GT

« **Reply #15 on:** September 17, 2008, 10:25:42 PM »

beerjet, do you have the timing cover/pointer and balancer from that motor ? If its a reverse rotation motor the timing marks/numbers will be backwards from a standard motor, right guys ? Might just have a reverse rotating cam grind

.

« **Reply #16 on:** September 17, 2008, 10:29:48 PM »

Thats a tall deck, just found it, the gears are cut to draw the cam to the block, look at the angle of the gears, also, all of the right hand engines had bolts in the cam to the gear.

Good call crewechief!

Killer motor if you know how to get stuff for it without going broke....Intake, distributor, pistons, etc....

« **Reply #17 on:** September 17, 2008, 10:59:18 PM »

Quote from: propless on September 17, 2008, 10:25:42 PM

beerjet, do you have the timing cover/pointer and balancer from that motor ? If its a reverse rotation motor the timing marks/numbers will be backwards from a standard motor, right guys ? Might just have a reverse rotating cam grind .

There you go again proppy, using common sense

Its more fun to play "name that part", your just cheating

Sooo when we gonna see that boat of yours running?, am I going to beat you to the water?

I'm shooting for the second week in October, if its not snowing (cooled off quik up here).

« **Reply #18 on:** September 17, 2008, 11:24:16 PM »

I ran the number on the norcal marine site and it didnt say anything about a tall deck . It does say that it is a 454 . The mortec site says they are either 2 or 4 bolts . This one is a 4 bolt . 3999289 is the best I can read the numbers on the back . This is getting interesting .

-beerjet-

« **Reply #19 on:** September 17, 2008, 11:57:33 PM »

What is the part number on the timing gear (cam) I'm using a laptop and can't read it.

GT

« **Reply #20 on:** September 18, 2008, 12:11:20 AM »

Quote from: GT Jets on September 17, 2008, 11:57:33 PM

What is the part number on the timing gear (cam) I'm using a laptop and can't read it.

GT

Since I didnt take a good picture , I cant even read it from the full size image . I'll get them tommorrow .

-beerjet-

« **Reply #21 on:** September 18, 2008, 05:45:10 AM »

After doing some searching on the computer, supposedly the easy way to tell a tall block is at the water pump mounts. The tall block has a .400 taller deck height and extra height is not raised at the water pump surface (the standard block water pump surface meets the deck surface).

So with this new found knowledge that block doesn't look like a tall block.

Back to you GT

« **Reply #22 on:** September 18, 2008, 09:25:44 AM »

Quote from: crewchief22 on September 18, 2008, 05:45:10 AM

After doing some searching on the computer, supposedly the easy way to tell a tall block is at the water pump mounts. The tall block has a .400 taller deck height and extra height is not raised at the water pump surface (the standard block water pump surface meets the deck surface).

So with this new found knowledge that block doesn't look like a tall block.

Back to you GT

I thought the deck highth was measured from crank center to cam center

-beerjet-

« **Reply #23 on:** September 18, 2008, 12:26:32 PM »

I think what you are thinking is a raised cam block (I haven't done any research on that one), but a tall deck block is .400 taller at the cylinder head deck surfice. The pistons were much thicker above the wrist pin and used 3 compression rings.

I read that one of the reasons was because the small bore on the 366 caused excessive heat in the combustion chamber and would melt holes in the pistons.

« **Reply #24 on:** September 18, 2008, 04:51:58 PM »

3856351

-beerjet-

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76 Bonneville

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