Alright. i have a 1967 camaro ss. i know u can't just tell my the ratio. but i want to know how to figure it out. its a 350. bored .030 over to a 355.
i have keith black forged pistons. 2.02 heads. and a the rest is stock as far as i know. i dont know anything about the engine. i got it 2 years ago. just pulled the heads off this year. found out it was bored .030 over

I want to know the compression because i wanna toss in a new cam.

How do i measure how close my pistons are to my head at tdc? and please explain this to me like i know nothing.

i know a bit but im only 17 so im tryin to learn as i go.

thankyou any advice would be greatly appreciated.

 

Well first of all find out everything you can about your pistons like how many CC's are you valve recesses, or is it a flat top? flat top is easiest, bring the piston to TDC, dont worry about backlash on this, just bring it to TDC & use a feeler guage to measure the distance between the surface of the block(where head bolts onto) & piston at TDC (volume above piston) thing is if your motor is tottally rebuilt you might want to CC the volume above piston, then find out your head gasket bore, head gasket thickness, head chamber volume(you will have to CC the head with valves in).

There is some more stuff but if you know those numbers & all the other data from a stock motor, aslong as your rods are the same & such just bring the new pistons into the equesion & email me I'll try to figure it out, its so hard to explain bahh.. I dunno why I even posted this, maybe someone with more experience with freshly built motors can use this information not to forget what they are gonna post but email me with all that info I might find out for you.

 

like I said if they are flat top, then its really easy.

 

Go to https://www.camaroz28.com/calcs/index.shtml
Clicky 'Compression Ratio Calculation' and fill in the blanks.

Also this belongs in a Normal Tech forum. Moving to Classic Tech, thanks.

 

how do i check the cc at tdc without taking my heads off?

and how do i calculate the fact that i have forged pistons in their?

 

how do i figure out the gasket hieght and deck height?

 

welp, i'll take a stab at it, since i'm right in the middle of ripping the 2nd head off my 350... TDC usually is = to the timing mark being at 0 on the timing points... so your passenger side front cyl will be at TDC.. the place you purchased should be able to tell you what cc the pistons would be if you can give them bore, stroke, deck height and if you'v bored the cyl's
the heads on my 350 are
1979-85 "350 CID" Intake=1.94 Exhaust=1.5 66cc
and the block is
1976 model 350 motor 4 bolt main (CMJ)
bore 4.001
stroke 3.48
if it's stock...
which i don't have any tools to check bore... and i'm not ripping the bottom end out of it.. i'm just doing the upper...
i don't know how to tell deck height yet, i'd guess you'd measure the bore size of the gasket and the thickness and use a forumula to find the cc of the gasket..
one question though, is there any way to tell which pistons i have without taking them out? their flat on top and have reliefs cut for the valves.. stockers?
~J