L16 big bore

[Eriks]

Any ideas how to get more displacement and grunt from a L16 ?

 

Edited October 18, 2018 by Eriks

[john510]

Yes,get an L-20B.

[DanielC]

You can put a L-18 crankshaft in an L-16.  Stroking an engine will add more "grunt" to an engine than the same displacement increase by boring the engine,

The L-18 engine will also bolt right in the car. 

If you can get a L-20-B engine, put that in the car.  There are minor fit issues with a L-20-B, because the block is taller, about 3/4 of an inch, or 19 MM.

 

Because the block is taller on a L-20-B, even if you use the same exhaust manifold that came off the L-16, that will move the front of the exhaust pipe closer to the the floor of the car.

 

Edited October 18, 2018 by DanielC

[banzai510(hainz)]

you maybe can get L18 pistons.

best to just get dual sidedraft carbs and port the head and cam if your limited to L16s .

I believe L20s were not imported up in Norway or those other Viking countries.

[Eriks]

I agree that L20B would be nicer. The problem is that we do not have L20Bs here. I could import one from overseas, as I did with for my 610 SSS, but the end cost ...

What we do have here are L16s and L18s. Furthermore regulations are strict, so I can not get the car approved with anything bigger than a L16.

That is, the engine has to appear to be a L16.

 

 

[Eriks]

I assume the L16 can be safely bored to 87mm, just as the L18. What about longer stroke? Is there any other crankshaft options than the L18?

[banzai510(hainz)]

L16 or 18 but to me they are the same in about gereral power unless your really good at sqeezing it. I cant tell myself and I only have L16 and L18s.

To me swapping pistons and cranks/rods is so minor to me its not worth it, But this is me.

 

put the money in head cam and carbs. or just buy a 32/36 weber and just drive it.

[datzenmike]

2mm cut off the walls all the way round the bore is.... a lot. But if you bore to 87mm and get VG30 pistons, and if you can find L13 rods you're in business. Place the VG30 piston tops down on sand paper and remove 0.5mm and it will fit.

 

This will make a 1,752cc engine displacement with 10.58 compression with a stock L16 head. However there is lots of room for opening up the shrouding around the valves and this will drop the compression to a manageable level. An open chamber L18 or L20B head would be 9.37 compression

[Stoffregen Motorsports]

What happened to this thread? I see some replies have been cut out.

[Eriks]

Dont think so. If so, who could do that?

Edited October 19, 2018 by Eriks

[datzenmike]

I could, but usually I might condense several rambling posts into one. Sometimes a post is obviously abandoned... like a quote but then no comment or the poster erased his comment and it's blank. I would  delete this, as it has zero value and besides wasting space it looks untidy. Again usually I would hide a contentious post from view that can only be seen by other mods. This way it can be un-hidden later if needs be. 

 

Perhaps there is a second post like this somewhere. https://ratsun.net/topic/74593-l20b-vs-l18-pulley/?tab=comments#comment-1587071