The Pontiac OHC Six

[squirrel]

Re: The Pontiac OHC Six

neat, were the rods and caps stamped with the cylinder number? The rods look like typical chevy rods. The rod bores have normal hone marks from when they were made (although resizing them gets the same type of hone marks again, but the grinding on the parting line would look different)

Nice to see that big crank fits in the block, at least

[ls7gto]

Re: The Pontiac OHC Six

Valve train is very similar to a 2.3 ford ie. pinto, turbo t-bird mustang.

[William Wilson]

Re: The Pontiac OHC Six

This is such a cool thread.

If only we had one of these for every engine.

[milner351]

Re: The Pontiac OHC Six

Nice work Randal!

When are you going to try the rod / piston on the 292 crank?

You know we must know!

you could at least see if it's going to take "a little" grinding or "monomental amounts of grinding" to make it work.

if it's "a little" grinding then the temptation to find a piston / rod combination that works will become "monumental".

;D

[TheSilverBuick]

Re: The Pontiac OHC Six

When are you going to try the rod / piston on the 292 crank?

I think this picture shows why I can't use my rods/pistons, the piston skirt will certainly hit the counter weights on the 292 crank with .6" more stroke :-\




Jim, nothing was stamped, hence why I used a sharpy to write each cylinder number on the piston and cap for the time being. I'll have to look up the 2.3 valve train set up. Kindalas, think it's time I pick up a service manual with this engine in it? :P

[milner351]

Re: The Pontiac OHC Six

yea - for sure you'll need to sacrifice a piston - maybe one of the two odd balls... or just take the piston off the rod and see what the crank end of the rod will do as far as interference with the deep skirt block.

If it's going to take major block machining, then also major bucks for custom pistons, as stated earlier - I'd keep it a 250.

[squirrel]

Re: The Pontiac OHC Six

First thing I do when taking apart an engine is to stamp the rods and caps if they're not already, and make sure the mains are stamped or cast with a number.

I forget, is the rod journal size the same? or .1" bigger on the 292?

[TheSilverBuick]

Re: The Pontiac OHC Six

Yeah, I need to pick up a set of stamps. I think I've seen them for sale at NAPA.

I don't know about the rod journals, I had heard that the mains were the same, and it appears to be true.

[squirrel]

Re: The Pontiac OHC Six

http://www.rockauto.com/catalog/x,carcode,1249253,parttype,5212

http://www.rockauto.com/catalog/x,carcode,1321861,parttype,5212

Using the handy rockauto resource, looks like the 292 has 2.1" journals, while the 250 OHC has 2.0" journals. bummer

[BBR]

Re: The Pontiac OHC Six

When are you going to try the rod / piston on the 292 crank?

I think this picture shows why I can't use my rods/pistons, the piston skirt will certainly hit the counter weights on the 292 crank with .6" more stroke :-\

But the main reason would be because your piston would be 0.30" in the hole at TDC. :D

Just need a 6" rod to put in it, eh?

[c6matt]

Re: The Pontiac OHC Six

neat project! there is a 69 firebird with one of these locally, very cool engine..

[6 Grrrs]

Re: The Pontiac OHC Six

Super cool build. Someone posted a link to your Buick site thread and then I saw the link to here.

Since I'm a member here, I've subscribed here. Looking forward to more posts.

The OHC-6 has always been an intriguing engine to me.

[TheSilverBuick]

Re: The Pontiac OHC Six

Cool deal! Where did you see the Buick link?


Don't ask where I dredged this up, but check out the date stamp on it. Don't loose sight of your goals! haha

I'd like to build a roller lifter and rocker arm Buick 455 with all the bells and whistles. Maybe with a supercharger or turbo.... Multiport Fuel Injecting it is Step one ;)

The other engine I had thought about when I owned a Firebird was an OHC I6, and build it for all the rpm I could get out of it.

[Tazracing]

Re: The Pontiac OHC Six

is this a 66 engine? those pistons look like the mess that was in my 66 tempest.. 2 where not the same as the other 4

[TheSilverBuick]

Re: The Pontiac OHC Six

is this a 66 engine? those pistons look like the mess that was in my 66 tempest.. 2 where not the same as the other 4

First post of the thread says the numbers are a '69 block. The same post with the pistons say the numbers on the head confirm it's a '69 head.