283 w/305 compression?

Not to hijack but my 57 283 is a stock 57 2BBL, with 8.5:1 stock CR, non PP heads.

I have a set of those 601's from that mob in Fla. Real niceheads for the money.

My engine appears to be real healthy as far as my vac gauge tells me, but still want to do a leakdown and if all is OK then my plan is to install the pocket ported 601's, add a Eddy Performer, a Summit 1102 or 1103 cam (have both) and a 600 vac sec Holley. The trans is currently a PG (will go to a T350 or 200R4 later) and has a 3.36 rear. Ive already added an elec ign and plan on keeping the ram's horns with the dual 2" system I put in.

I've calculated it will wake her up and CR would be around 9.6:1 with .020" steel shim gaskets and a .020" overbore, perfect for what im after.

Im going this was as Im reluctant to swap out an engine that is in good shape, I prefer to just maximise her potential with a little more pep/sound as shes just my street cruiser/daily driver.

Rat

 

"Blueprinting" is a relative term, but basically, it means pushing all of the clearances inside the engine to the maximum factory tollerance.

For example, let's say that Chevy "advertises" the stroke to be 4 inches. But because of the slop ***ociated with mas-production, a given 350 chevy will have a slightly different stroke for each piston... Just fractions of an inch. One piston might be 3.994 inches, and the piston right next to it might be moving 4.006 inches.

Chevy understands the "slop", so they say the variance might be between 3.990 and 4.010. This "window" is the tollerance.

When the builder blueprints the engine, he will grind the crank in such a way to make sure that every piston moves the maximum [4.010] within factory tollerance.

Keep in mind that every single part inside the engine has these factory tollerances... So when the builder blueprints all the parts to push the maximum tollerances on every single one of them, the compression can rise dramatically.

The block's deck height, the pistons pin height, the CC's of the heads combustion chambers, etc, etc, etc. When it's all said and done, 11:1 becomes a reality, even tho the engine is only advertised as 10:1.

[this is just a generalized description]