the difference between the b16 and the b18c is, the b18c block is 7mm taller than the b16. thats where it get the extra 0.2lt of displacement in the b18c.
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the difference between the b16 and the b18c is, the b18c block is 7mm taller than the b16. thats where it get the extra 0.2lt of displacement in the b18c.
Please explain...Quote:
Originally Posted by jimmeh
Displacement has nothing to do with the block height. It is derived purely from the bore and stroke.Quote:
Originally Posted by jimmeh
Ill try post up a spreadsheet i built detailing a few facts & calculations.
Should be helpful for everyone
You have to have a block tall enough to hold the stroke otherwise the pistons will stick out the top of the block at TDC and/or posibly fall out of the sleeves at BDC. If the B16 sleves/block is shorter, this could well happen with B18 parts.Quote:
Originally Posted by wynode
[ KNR ], you're gonna have to figure out if your stroke + pistons fit inside your sleves. To do this you'll need to measure:
a = Your piston height from top to bottom of the piston
b = At TDC, the overlap of the piston over the block
c = At BDC the distance from the top of the block to the top of the piston
d = The length of the sleves (you'll need to take your pistons out to measure this)
To work out stroke:
x = c+b
Then you'll need to add your piston height (they need to fit in the sleeve):
y = x + a
Now for the answers:
If (y) is less than or equal to (d) then your pistons will fit, the problem is your conrods are to long. Solution: Get new, shorter conrods
If (y) is greater than (d) then your stroke is to long. Solution: You need a new taller block (to hold everything) or smaller crank (reducing displacement)
There's a gray area here though, as the piston doesn't technicaly have to sit totaly within the sleeve, only the piston rings do. But I'd wanna be safe and keep the whole piston within the sleeve (or most of it anyway). I heard of someone who stroked a V8 out so that the rings almost came out of the bottom of the block. The piston rings wore out in no time and he had to pull it all apart again and lower his stroke.
I've never actualy pulled an engine appart myself, so I'm not 100% sure about how much of the piston is safe to come out of the sleeve. I'd guess not much.
Anyway, hope this helps.
the 'piston to deck height' on the B16 is also smaller than the B18's, at 0.02in and 0.03in respectively
so there is an easy 10 thou to play with ;)
ProECU - dont hold back on the s/sheet :D
i did a bit of reading and came across this.Quote:
Originally Posted by ProECU
http://b16a.honda-perf.org/extras.html
and u can check with adrian -todaAU
i agree with u but a taller block would mean u can get a longer stroke and therefore a larger displacement.Quote:
Originally Posted by wynode
what on earth does this have anything to do with anything?Quote:
Originally Posted by jimmeh
b18 crank and rods can be fitted into b16a block with hybrid TECH43 piston kit.
you can also use a Toda stroker kit to make the B16A 1.8l
http://www.todaracing.com.au/assets/...1800kit_sm.jpg