292 Engine specs

[TJ's Chevy]

So I actually figured out something...I think(Its dangerous when I do ;-)...Anyhow! 10:0:1 compression is 240 pounds I believe..so..7:6:1 or 8:0:1 would be at least 150-170 pounds of compression right? If so...MAN!!! My 292, which is down to 95 pounds mind you, only has like...5:0:1 or even less.

[Classic1965]

Yikes that sounds like trouble, well at least you have a spare engine in your parts truck.

[66Submarine]

You have a longer duration hot-rod cam in there, don't you TJ? That lowers the dynamic (or "cranking" or whatever) compression, because the intake valves are still open longer while the piston is coming back up. As a result, you effectively shorten the available stroke/cylinder volume you are compressing.

The gauge itself may also be reading a little low, and you do have some loss from advertised even in stock form from the pistons being down in the bores from spec (and from valve timing to some extent).

Here's an example of a dynamic comp. calculator: http://www.wallaceracing.com/dynamic-cr.php

[TJ's Chevy]

Originally Posted by 66Submarine

You have a longer duration hot-rod cam in there, don't you TJ? That lowers the dynamic (or "cranking" or whatever) compression, because the intake valves are still open longer while the piston is coming back up. As a result, you effectively shorten the available stroke/cylinder volume you are compressing.

The gauge itself may also be reading a little low, and you do have some loss from advertised even in stock form from the pistons being down in the bores from spec (and from valve timing to some extent).

Here's an example of a dynamic comp. calculator: http://www.wallaceracing.com/dynamic-cr.php

Nope..Stock cam far as I know..I haven't torn into the motor yet. The stock cam was 181 degrees duration at .50 lift and .401 lift intake and exhaust. I believe the oem cam is still in there.

[TJ's Chevy]

It appears the compression is down to about 5:7:1- 6:0:1..somewhere in there is 95 pounds. The 292 in my 64 shows 120 pounds in all cylinders..and it runs perfectly fine..as does my 66's. Both are stock internally...course...someone may have done something to the 292 in my 66 later on before I got a hold of it. Maybe new pistons or something that ended up lowering the compression..maybe I have a blown head gasket...not sure. On the calculator I used the correct 3.875 bore and 4.120 stroke..connecting rod length of 6.700 and what the heck is "Static compression"? Anyhow..I put that as the stock 8:0:1 ratio and it came out as 184 pounds(If I'm remembering correctly). Well...getting to be time for a rebuild! LOL!

[Classic1965]

You may want to try dumping a small amount of oil down each cylinder are retesting the compression. This will help you determine if it is head or block issue causing low compression.

[TJ's Chevy]

Originally Posted by Classic1965

You may want to try dumping a small amount of oil down each cylinder are retesting the compression. This will help you determine if it is head or block issue causing low compression.

Thanks..yeah I'll have to figure out something. lol

[Classic1965]

Good luck hope it's nothing seriously wrong with it. My back up motor is a 327 although it is worst off than the 292

[66Submarine]

Huh--interesting then. BTW, "static compression" is just that; the volume of the bore/stroke divided by the volume of the combustion chamber, etc.

[Classic1965]

By the way you make these 292 engines sound, I don't think I will even need to keep the 327 around as a spare. The 327 is actually a marine engine that I was thinking about converting over to road use, but now I may as well leave it alone.

[1Bad62Pro/Street]

Chevy Six Cylinder Casting Numbers
http://67-72chevytrucks.com/vboard/s...d.php?t=356268

Langdon's Stovebolt Engine Co. - Specializing in GM 6 Cylinder Engines
http://www.stoveboltengineco.com/

Hot Sixes - Chevy inline 6
http://www.hotsixes.com/chevy-inline-6/

Inliners International
http://www.inliners.org/
http://www.inliners.org/casting/numbers.html
http://www.inliners.org/tech/info.html

Clifford Performance :: Make 6 = 8
www.cliffordperformance.net/
http://www.cliffordperformance.net/M...gory_Code=C250

CHEVY 292 ENGINE 63-66 COMP ENGINE
http://www.powertrainproducts.net/CH...Fc1j7Aodt10AeA

Chevrolet Inline 6 Cylinder Power Manual 194 215 230 250 292 Engines 2nd Edition
http://www.faxonautoliterature.com/C...on-P24594.aspx

[Classic1965]

Just attempted removing 49 years of grease of of the 292 engine and 3 speed transmission today. I used an engine degreaser made by spray nine and then powerwashed it all off, I did this multiple times and there is still grease on the block. Anyone have any ideas of how to get this stuff off in one try.

[1Bad62Pro/Street]

Originally Posted by Classic1965

Just attempted removing 49 years of grease of of the 292 engine and 3 speed transmission today. I used an engine degreaser made by spray nine and then powerwashed it all off, I did this multiple times and there is still grease on the block. Anyone have any ideas of how to get this stuff off in one try.

Try gasoline.

[Classic1965]

I was thinking varsol, but gasoline would work too I guess.

[1Bad62Pro/Street]

Kerosene is good as well bud.

[Classic1965]

I think I may be missing a piece of my bell housing between my 3 speed tranny and the 292 on the bottom by the oil pan, the rest of the engine seems weathered except there. There are bolts holes and the steel is still shiny. Anyone have a picture of this area so I can compare it to mine?

[66Submarine]

Sounds like you are missing the dust cover for the clutch; I'd guess probably something like 5% of these trucks today have that piece still attached.

I wouldn't (and don't) think twice about the lack of that cover, personally. Others may chime in, but it seems to more or less have been a solution to a problem that doesn't exist IME/IMO.

[Classic1965]

I thought I was missing a part, I'll look for one and if I find one I'll bolt it on

[TJ's Chevy]

How we drive my 292. Not bad for being 48 years old huh?
https://www.youtube.com/watch?v=YoiM0nIA_7c

[AcampoDave]

Sounds good TJ. Are those his and her ratchets on the dash?

[Classic1965]

Sweet truck, sounds good

[WATSON403]

I just read the whole thread so far and I saw you guys getting exited about a 292 with 105k on it and I just picked mine up with 28k on it I'm pretty exited

[TJ's Chevy]

Originally Posted by AcampoDave

Sounds good TJ. Are those his and her ratchets on the dash?

Nope..those are mine...Dad was driving and I was recording. I forgot what I was using them for at the time. lol The smaller one was used to hook up the battery cable..and the bigger one I don't remember anymore. lol

Originally Posted by Classic1965

Sweet truck, sounds good

Thanks!

Originally Posted by WATSON403

I just read the whole thread so far and I saw you guys getting exited about a 292 with 105k on it and I just picked mine up with 28k on it I'm pretty exited

Mince has 140k. lol Yours isn't even broke in yet!