Compression question

[STREETREBEL]

My engine has zero deck pistons and 516 heads.
Could someone give me a close guess what my compression would be.
Hope to run 91 octane!

 

[beanhead]

Based on the information given, somewhere between 7.5 and 11 to 1.

 

[Nate S]

Huge lack of info here but enough to say probably no to 91 octane. 10:1 plus on a 361 or 383. 11:1 on a 413-440

 

[1968rt]

Zero Deck .030 over, 7cc notch pistons, .020 steel head gasket...10.5 .039 head gasket 10.1. thats with no milling on the heads

 

[WileE]

You may have an idea what your static compression ration is, but the dynamic compression ratio is more important. What cam are you using, how is it timed, etc,etc...

 

[Curiousyellow71]

https://www.summitracing.com/newsandevents/calcsandtools/compression-calculator

 

[BSB67]

My engine has zero deck pistons and 516 heads.
Could someone give me a close guess what my compression would be.
Hope to run 91 octane!

What is your engine?

Probably the only possible zero deck would be a 383

 

[STREETREBEL]

I'll use the calculator from Summit.
Thanks everyone.

 

[1968rt]

https://uempistons.com/p-27-compression-ratio-calculator.html