b16b copy

[caddy]

hi all , i'm planed to make a b16b copy.
in copy i mean the same rod/stroke ratio.
but i have a question for the EK4 professional.
i want to start with a b18cX bloc and a p73 head ( ported & valve angle) to have high comp ratio, may be over 12.5 if it's possible.
some question is wich crankshaft and rod use to have 1600 cm3?
as i see is the b16a crank don't fit in a b18c bloc cause of different main bearing size, i'm right on this ?
is there any special rod to ressit at verry hight RPM ?

 

[blinx9900]

your correct, the b16a crank wont fit, you must use a b16b crank, if you want a 1.8 with the same R/S ratio as the b16b your going to have to use a b18c block, B16B crank, custom b16b length rods. the block will need to be sleeved and fitted with 86mm pistons.

thats honestly all pointless though, r/s ratio is not the only important factor. why do you want to do this anyway?

 

[caddy]

your correct, the b16a crank wont fit, you must use a b16b crank, if you want a 1.8 with the same R/S ratio as the b16b your going to have to use a b18c block, B16B crank, custom b16b length rods. the block will need to be sleeved and fitted with 86mm pistons.

thats honestly all pointless though, r/s ratio is not the only important factor. why do you want to do this anyway?

so i don't want a 1.8l , i want a 1.6l like b16b that's why i would start with a b18 bloc, i need this rod ratio to rev over 9500 with less stress and make an high power engine for track only.
to do this i have to found a b16b crank only ? there is no aftermarket part for crank and rods ?(

 

[RagingAngel]

Are you trying to build a motor for a specific race series where the limit is 1600cc?

If not, you are really missing out on the punch the 1.8L can deliver even at the very top end. Revving to 9500rpm is nice I suppose - who's going to port your head and what kind of cams are you planning to fit and what compression ratio are going for. What are the power goals?

There is no aftermarket part for the 16B crank and rods. The rods you could get custom made from the likes of crower or pauter or cunningham just to name a few.

 

[caddy]

yes there is limit of 1600cc, power goal the max possible as the bloc and components can support .

for the camshaft we don't know yet , may be BC spec V or VI after few test.

 

[ek9chris]

I still may be missing the point here, but for all the work/time and the custom parts that are going to be needed, wouldn't buying a B16B be cheaper and easier ?

 

[lumek4]

well i know where i live in scotland that sort of work would cost around £3000 just to do the work and thats not even buying the parts to do the job. me myself would just be buying a b16b engine off someone strip and rebuild it. then all the money you have saved spend on getting the head ported polished,gas flowed, 5 angle valve job, high comp valves, bronze guides, uprated v/springs and retainers and what ever cams you decide to go for. then an aftermarket inlet manifold and TB. it will be much cheaper than the way you are going about it.

 

[caddy]

I still may be missing the point here, but for all the work/time and the custom parts that are going to be needed, wouldn't buying a B16B be cheaper and easier ?

yes it's on the balance too .... but we need a very high comp ratio. so we may need to change the head .

 

[caddy]

well i know where i live in scotland that sort of work would cost around £3000 just to do the work and thats not even buying the parts to do the job. me myself would just be buying a b16b engine off someone strip and rebuild it. then all the money you have saved spend on getting the head ported polished,gas flowed, 5 angle valve job, high comp valves, bronze guides, uprated v/springs and retainers and what ever cams you decide to go for. then an aftermarket inlet manifold and TB. it will be much cheaper than the way you are going about it.

but probleme in rebuilding b16b and if we want to stay under the 1.6l we can't overbore the bloc to fit bigger piston and then have a correct round sleeve too.
that's why i 'm trying to found other possibiliti, way that we could buy new part for rebuilt the engine after some race.
so as i see the master pieces is the crankshaft from the b16b, all other part could be found more easly.

 

[blinx9900]

yes it's on the balance too .... but we need a very high comp ratio. so we may need to change the head .

changing the head will not affect your compression ratio, milling the head or changing pistons however will.

 

[RagingAngel]

well if he changed to a P72, the compression would get bumped...

as for rebuilding the 16B.... just sleeve the block. You're spending so much time hunting around for parts as it is, how do you know the 16B block won't have piston to wall clearances suitable for a non-OS rebuild?

Once you have that 16B block, you can look for other 18C blocks for backups. I dunno, sounds like a lot of chasing your tail around...

 

[blinx9900]

well if he changed to a P72, the compression would get bumped...

, a whole .2 that doesn't count, you knew what i meant

caddy why not use a b16a? the r/s ratio is not that different 1.73 for b16a, 1.84 for b16b and they have been proven to hold up under endurance racing situations, at 9500rpm i would worry more about the head than the block. also if you use the b16a block you wont have to get custom rods, you can get off the shelf eagles which are $300 usd and if anything brakes parts are easier to find.