[1971455HO]

How do you know how thick your head gasket will be after you torque it? Should I have asked for a specific thickness, cc's, volume, etc? I just wanted to calculate my C.R. I cc'd my heads and they are 105 (originally 111cc's, cut .030"). Just guessing that my gasket squeezed to .035" I calculated my C.R. to be 8.9:1 based on the following: 4.18" bore, 4.21" stroke, 105 cc's heads, .001" deck (almost zero deck), 6 cc's (estimate) valve reliefs and head gasket at .035".Thanks, Eddie

[GonicGM]

Originally Posted by 1971455HO

How do you know how thick your head gasket will be after you torque it?

Often, there are voids where the gasket doesn't exist between the machined surfaces of the head and the deck. You can use feeler gauges to measure.

[1971455HO]

Thanks a lot Mike and Gregg for the responses. I really felt dumb after seeing what Gregg was talking about with the nooks and crannies where you can put a feeler or a wire gauge between the head and the block. Why didn't I think of that? I went back out to the garage and checked it.....040"...not .035", back to the drawing board. Thanks a lot Gregg, I learned something. That's always a plus. Thanks again to both of you. Mike, I'll PM ya just to see what it should be according to part number.

[2manyT/A'S]

If you haven't got the (new) July HPP yet,you better hustle & pick one up.(before they are sold out)

It's gotta be one of the most interesting issues of late.

FIRST on the "must read" list is a VERY INFORMATIVE article on the PURE STOCK MUSCLECAR DRAGS,written by Mark Weymouth ,forum member & contributor to this (455 HO) thread.
Photography by 455 HO "Hot Shoe" Dan Jensen.

VERY informative article outlining the concept,history & rules of the Pure Stock Drags.

SECOND on the list is a "Shootout",featuring FOUR Pure Stock RAM AIR Pontiacs(including Jim Mino's NOTORIOUS first gen Bird & a Lucerne Blue 4 speed 70 T/A)

THIRD is a 7 page article on a 63 Catalina 421 SD written by Forum member Rocky Rotella.

GREAT stuff here if you like reading about "stock" Pontiacs & what they can do on the track.

ENJOY!

[threefidee]

Great issue, and the next several issues will show different engine combos and more to come in the Pure Stock Prep School series.

Jody

[keith k]

Originally Posted by 2manyT/A'S

If you haven't got the (new) July HPP yet,you better hustle & pick one up.(before they are sold out)

It's gotta be one of the most interesting issues of late.

FIRST on the "must read" list is a VERY INFORMATIVE article on the PURE STOCK MUSCLECAR DRAGS,written by Mark Weymouth ,forum member & contributor to this (455 HO) thread.
Photography by 455 HO "Hot Shoe" Dan Jensen.

Definitely a great issue.

I was just reading the Pure Stock article this morning. The intro to it was great, and a good sales pitch for Pure Stock, too. Mark should be a novel writer!

More motivation for me to go this route with my RAIII Formula when I restore it. I think the Formula has the potential to be slightly quicker than a comparably built RAIII T/A because it's a bit lighter and has probably a more effective "ram air" system. This would be true of the '71/'72 455 HO cars as well (gratuitous comment to keep the thread on topic...).

But alas, it will be several years before I even start on it
Have to keep this issue near the top of the stack...