i have put in over 3k into my engine but i might of bit off more than i can chew. I underestimated the amount of planning that goes into an engine rebuild. After purchasing Edelbrock performer heads, Intake, High compression flat-top pistons and Comp cam i keep running into different issues. Yes this is my first engine build. So my issue now is compression ratio... where can i find information on my "crank stroke", and "deck height"?

 

Welcome, what engine are you rebuilding? Part numbers for the pistons and cam will be needed also.

 

Thanks, its a 350 bored over .030
Pistons # L2320F30
Cam# SK42-224-4
and just in case...
Heads #60519
intake #7111

 

Stroke: Listed your Chassis Service Manual (it's 3.385").

Deck Height: measure with a depth gauge from head sealing surface to piston at TDC (do it on all four corners to be sure you get an accurate number).

Welcome to ClassicOlds.

- Eric

 

Don't we have a FAQ on this?

The volume just described is that above the piston at TDC, but within the block.

CR is defined as Volume at BDC : Volume at TDC

Volume at BDC = Volume at TDC + cylinder volume
I presume you can do the pi r^2 x stroke to get cylinder volume

So that leaves volume at TDC
you have to add up
-piston dish volume [piston mfgr or measure it yourself]
-volume within the block, above the piston, as discussed above
-head gasket volume- just like the cylinder volume calcs
-head combustion chamber volume- mfgr info or measure yourself.

A spreadsheet such as Excel is very handy for this sort of thing.

 

... Or the back of a napkin.

- Eric

 

this may help....


http://www.summitracing.com/popup/ca...ion-calculator

 

You know a note book and pen works too lol . I usually keep a file folder with all the part numbers from the boxes cut out, recipts and the sheets off that note book with all the specs written out. usually I also end up writing them on the file folder. 72 burning I'll tell you what I told one of my very close friends. I would not want to learn with expensive new parts. He is in the same boat as you building a 347 stroker ferd engine. I have had to bail him out a few times but now he is nervous as all hell to finish it up. Take notes pay attention to detail don't be discouraged when you feel you have a stupid question. I have built my share of engines. Usually junker swap meet affairs I build on a budget to race. With every engine I have gained knowledge I think I have made almost every mistake you can during assembly but have always caught it. Maybe you should build a practice engine at this point lol. Id hate to learn the hard way with that much money in parts.

 

Thanks for the info guys and the much needed motivation coppercutlass. Unfortunately im stationed in a military town where the mentality is always go big or go home, usually never ends well. Doesn't help that mechanics around here take advantage of military. But after some more research and youtube of course im feeling a little more confident. Thanks again guys these forums are really helpful.

 

Do yourself a favor and buy the mondello tech ref. Book and the high performace olds v8 book by SA design written by bill travato.

 

Get ready for more issues. The edelbrock heads are designed for big blocks, not small blocks. Your compression went out the window when you went from 65cc to 77cc combustion chambers.

Also, the stock style fuel pump will not fit now, and you either need to space accordingly, and modify the fuel pump actuator rod, or run an electric pump.