Updated 3100 specs for compression calc

[SappySE107]

3.5" bore
3.31" stroke
3.622" gasket bore
.060" thick
28.6cc head
25.5cc piston dish
3137 cc
9.54:1

The piston dish I guessed on. The head is the same as the 3400 and the piston dish can't be the same volume as the 3400 due to the bore size. The stroke is the same as the 3400 so I made it 3.31. When I tear apart a 3100 here in a week or so, I will get more accurate specs.

[robertisaar]

The piston dish I guessed on.

the sign of a winner

it seems to make everything else correct though, so it can't be far off...

[bszopi]

Guess I need to update the database now, huh?

[SappySE107]

Sometime:P

[bszopi]

Done. Although I come up with 3130cc instead of 3137cc. Lemme go back to 3 decimal places for bore and stroke....

That give me 3134cc and 9.55:1 CR...

[SappySE107]

why is it 3.307 stroke for a 3100 and 3.310 for a 3400?

[bszopi]

Who knows...

[SappySE107]

we are all teh winnarz! Im the captain of this ship...

[bszopi]

The CR Calculator is now available in pop-up form! Look at the bottom left of the screen, on the facebook-like bar. There is a piston icon () that, when clicked, will bring up the CR Calc in a window above the rest of the forum. Let me know how it works for everyone.

If you don't see the icon, you may need to hover over the bar, right click and refresh.

[robertisaar]

i needed to do the right-click refresh thing, but it works for me.

[geldartb]

oh yeah

pretty cool. i saw the icons the other day down the bottom. never really looked there before.