Compression ratio (am I correct?)

[gachax]

I used this calculator to determine CR:
http://www.zealautowerks.com/

I've got over sized JE pistons, eagle rods and total amount taken from head and block decks together is 0.5mm (0.0197").

Could someone check if I entered correct numbers (in attachments)? And which one of HG thickness (CR) would be the best if my future goal would be from 350-400rwhp? Is it safe to go with 8.98:1 while using 98 octane (93 in USA) fuel? I've seen someone here driving with 9.1:1...

 

[sneakypete]

if im looking at this correctly... isnt that calculator for honda engines?
-pete

 

[IJ.]

Also keep in mind that at TDC our pistons are 20 thou out of the hole already.

 

[gachax]

hmm... yes, it seems to be calculator for Honda engines... it wouldn't matter if Piston-to-deck Height wasn't calculated as -0.010 (don't know mm or in) for my engine (as IJ said it's already 20 thou out).

Ok, tried another one:
http://www.csgnetwork.com/compcalc.html

If I'm right, the results are different...
I entered -015 mm as piston-deck clearance (0.05 mm (20 thou) + decked amount from block: 0.1 mm).
Entered gasket thickness of 1.0 mm corresponds to actual 1.4 mm because of material milled from the head (0.4 mm (it's the second time for that head)) and 1.6 to actual 2 mm.

Does this sound feasible?

 

[gachax]

could somebody confirm/correct that ^ ?

 

[nosman4]

Um, something is wrong with your first calculator or a value is wrong. For some reason the calculator thinks you have a 2.0L engine. We have 3.0L. Don't know what's going on.

 

[gachax]

Um, something is wrong with your first calculator or a value is wrong. For some reason the calculator thinks you have a 2.0L engine. We have 3.0L. Don't know what's going on.

Yeah, I already realized the first one is not for our engines . (actually I don't think it's wrong because of that, but probably the deck clearance).
I'm more interested if everything's fine in my last post.