So I was playing around on the Zeal compression calculator the other day, just to see what kind of compression I'd be making. And I inserted everything that I know of, and I'm just unsure of my connection rod length. I have a D15B block mated to a Y8 head, and I figured out that if my rods are 134mm long I'll be at around 10.3:1, but, those are the rods from a D15B7, I chose the D15B rod length and they were 137mm long and that bumped the compression up to 15.1:1. Which is amazing, but I don't wanna get it tuned for that high if it won't be haha. I know the D15B blocks are usually vuagly stamped from what I have read in other forums, but I would really like to know how I can figure out what my rod length is. When my cylinder 1 is at TDC it sits mayyyybe 1mm from the deck of the block. If that.

Hope I gave ya'll the info you need to help, just wondering before I go spend money without full knowledge lol

 

Here's a pic of the block stamp if it helps any.