downstrocking a b16


Could always start off with a D14A4 and stick a D16A8/9 dohc head on it, just an idea, pretty sure you could do that.
 
its the d14 and d16 the same block meaning pistons size if soo used vitara pistons and tubo the d14 you may also be able to swap a vtec single head in there or just the inlet manifold
some people sleep on the d series i had seen some craizy ones
 
I'll have a shot at a better explanation of de-stroking a B16.

First off, there are to my knowledge, no factory Honda crankshafts that will fit. You'll be looking at around a 68mm crank, which will most likely need to be a custom job.

To put the pistons in the right place on a B16B, you'll need to lengthen the rods from 142mm to 147mm. More custom parts.

Due to the lowered capacity, even the B16B pistons at the correct height are only going to give you a 9.6:1 compression ratio. Add some custom pistons.

Based on that bottom end geometry, and providing you can get the pistons down from 327g on the B16B to around 250g, you'll be good to run to around 11500rpm.

Based on 11k and the stock head flow, you'll be needing cams in the region of 260° and 12mm on the intake.

Based on those specs at stock valve timing, you'll be needing around a 12.3:1 CR to produce a cranking pressure of 245psi. (Stock 247) To generate that compression you'll need an 18cc dome on your pistons. At those sorts of speeds you may well find running a dome that size will hinder flow through the head on overlap as the intake charge effectively hits a brick wall, in which case I would be looking at reshaping the combustion chamber to use as flat a piston as I can get away with. More custom work.

After all this there is still all the intake/exhaust/ECU tweaking to sort.

It would make good power, but it would be a horrendous project to undertake financially. Is there not a 1600cc class you could run in instead?
 
As far as i'm aware Custom crank is your only option as it is the only way to change the stroke, undersized liners would cause the valves to hit the liners, changing the length of pistons or rods would not affect the length of stroke, only where the piston changes direction
 
Hadn't thought about the valves hitting the liners.

There are tried and tested engines for big power at 1.4L, I know a 1.4 Corsa rally-car which has a £40,000 engine and keeps up with all the big-boys in their world rally cars and often comes in with an overall place let alone a class win. The 1.6 class is the better class by far as there are always more entrants and more diverse cars.
 
D14A4 Block, D16Z6 Head, D15b import cam in the head, D15b Gearbox with LSD,

These setups up breathing mods and a mapped ECU can often see around 140-150bhp and it's pretty cheap incomparison to what your considering! Oh and you have VTEC too!

But this is just using OEM parts, I'm sure you could use thinner HG's, Aftermarket cam etc.. for more power after this.

Google DoDo upgrades ;).
 
Job done.had a lad from the midlands somewhere to make me a crankshaft and some sleeves and pistons all running now as a 1400cc.
 
cool, any more info on it? whats it run like? I've watched videos of the old school city rev'ing the head off itself and its a 1300.
 
Nice one mate.
Any pics or a dyno graph?
 
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