Projects Mid Life Crisis 62 Vette

WOW. I'll follow along intently. I've got a couple of 327's that need freshened up and this is what I would like to do. What are the cam specs? thanks.

 

some specs

 

We're building a 360 hp engine. Now I have to go back some pages and see how this started. Looks good Jim.

 

That's a healthy cam.

 

Preposterous! Heresy!

Everyone knows that all SBC parts are interchangeable with any other SBC . . .

 

With 66 degrees overlap at advertised duration and 10 deg at .050, that cam should be a little lumpy around town. Should do well with the heads and intake I'd think. With decent compression it should be a runner.

 

Surprised u do not have one of those tools to determine push rod length needed. Forgot what I paid for mine but change heads, rocker arms, whatever, easy tool to use. Basically an adjustable push rod to get correct length. Measure what you end up with & order the right ones. Believe SNC intake & exhaust same length. Big blocks need different length.

 

I have one….an old push rod cut 1/2” out and taped for a piece of all thread….locking nuts optional

 

I had a length tool for the Hemi, but that went with the car. I ordered another one....should be here soon. I just put in another order for more parts today. And I expect there will be a couple more before I'm done.

 

I have always relied on one of these cheap things...

 

0 deck that 327 if you can.

 

I'm not taking the pistons out this go round...and they do sit down a bit...

 

We did have better gas back in those days.

 

Just speculating here, but with those head's and steel shim gasket's, compression should be in the upper 10's, correct? That combo of part's should wake that puppy right up!

 

Are those the TrikFlo heads or the Speedway heads and what cc are they ?

 

Trick Flow 175

 

Checking pushrod length....first of course, I have to understand how it works. From what I can tell, the pushrod wants to be long enough so that the line between the rocker pivot center and the roller tip center (or the center of the radius if it's a solid tip) is perpendicular to the valve stem, at half valve travel. This will minimize the motion of the rocker tip on the valve tip, and minimize side loading of the valve stem, as well as maximizing lift.

A couple pictures, at zero lift and full lift




The wiping of the rocker on the valve stem can be checked with prussian blue



this is the setup, with checking springs and an adjustable checking pushrod set to 7.40 inches.



The lifters are hydraulic rollers, and they have not been run, and have some travel...so things aren't quite as exact as they should be. The instructions for them call for .075 to .125" preload...a bit more than I'm used to, but that's what they want. Checking them with hand pressure I get about that much travel of the plunger with the force of the light checking spring on the valve, so I think my results are going to be close enough. Of course the pushrods I have are a bit too short...so more parts to wait for.

On a positive note, the heads are not quite the size of the originals. I think the valve stems are longer, and the cover rail is raised. My testing with a stamped steel original valve cover shows that it clears the rocker arm at all positions, without the gasket in place. I ordered some fancy 5/16" thick gaskets, just in case.

This is the first set of roller pivot rockers I've used on any of my engines. Pretty strange and modern!

 

Pretty soon, you'll switch from mechanical to electrical tach!

 

I have an electric tach in my old truck, been in there about 45 years now. But I like playing with the mechanical ones when I can

 

Jim, are you building this for a specific event, like the next Drag Week or just general purpose fun?

Devin

 

Yes.

I'm signed up for Sick 66, a drag week type event this October. And I want to make it go faster, becuase, well, that's how I am.

 

Go Squirrel Go !!!

 

thanks!

Slow progress. I got the new damper on, pan on, heads bolted down. No pushrods till probably Wednesday, so I'm not in a rush. I'm working on the intake now....and sorting out a few things that are changing that I need to make sure I have parts for.



Fun fact: I'm gonna paint it all orange! even the aluminum bits.

 

Sneaky squirrel. So would I!

 

NICE!!! Make it look like a 300hp 327! I gotta look through my stash of useless shit, I might have a pair of '62 style valve cover's for 'ya. No promise's though, my memory ain't THAT good.
Or pawn it off as a 340 horse version, leave the intake aluminum and add some Corvette script valve cover's. Only the Purist's will really know the difference...

 

Not to hijack thread but where did you get that tool MCjim? Thanks

 

Heads look a little long as well.

 

I was concerned about the head sticking out too far, but it's flush with the face of the block, so the mount will clear it by the thickness of a water pump gasket. The intake is off a 62 Corvette, so it should clear the mount also, but I'll double check before bolting it on, thanks.

 

Hope the rear end can keep up to the new engine.