what does this apgrade actually do to the block?

 

It's making the combustion chamber larger. Boring it makes it larger, and getting custom pistons/rods will effectively stroke it. You'll have more torque, and the horsepower gain from stroking is generally linear.

Stroking puts more stress on the cylinder walls, I believe. That's why if you want to bore it as well, you might as well sleeve it instead.

 

coo. thankx i was thinkn about doin this as my next upgrade.

 

oh thats cool you were thinking about spending $1000 for the resleeve, $500 for the custom pistons, and about 1-2 months down time. Just saying it's not a straight forward upgrade, its probably the biggest one you can do to an engine's internals.

 

You need a new crank too stroke an engine, rods and pistons alone won't do it.

 

Yah, I know.

Here's a suggestion. Forget about stroking it. That alone is gonna cost you an arm and a leg. For the great low price of just an arm, you can sleeve it and bore it. Golden Eagle Manufacturing seems to be reputable among HT users. You can sleeve it and bore it to 84mm, which I believe puts you at or near 2.0L. That should be enough. With the high strength sleeves, you can then turbo it to your heart's content.

 

can you sleve a b16 to 84mm?

is that what your saying?

is this what the B20b/z is? stroked slightly? i guess so?

my question is - if i sleeve a b16a to 84mm, do i keep the rod/stroke ratio & what happens to the compression ratio?

do i need a massaged head - with bigger quench areas?

am i on the right track?

or is it easier to B20vtec it?

thanks,

t..

 

dammit....this question is constantly asked.
Isn't it FAQ'd somewhere already?

the B20 block is a beefed up LS block from Honda. That's all it is. What they do is resleeve the LS block with thicker sleeves that allow a wider piston, and slap some wider diameter piston in there, yet retain an LS crank and rods. That's all a B20 is....JDM or US. They stroke it by putting a wider piston in. That's another form of stroking...which is a lot cheaper than making a whole new crank.

Now, if you wanna make your B16A a 2L block, it's not a good idea to stroke it the conventional way - using a 1.8L crank, custom rods and some type of wider piston. The best way to stroke it is by resleeving the block and going with a wider piston ONLY. But some magazine did a test (turbo mag I believe) and found out that stroking a B16A with a wider piston (i believe close to 2L) didn't do too well for a naturally aspirated setup ....but it did work well with a turbo application ...this is also known as 'short rod/long stroke'. A CTR engine is a opposite of that 'short stroke/long rod'. The good thing about going with the wider piston stroke technique is that you keep the B16A's near-to-perfect rod ratio. The compression ratio should go up as well when you go wider piston....it also depends on how much of a dome and where the wrist pin location is set on the pistons you're planning to put in.

IMO, if you want to go B20/vtec......do the dew...and just go with the oh-so popular route of the B20-vtec. It's probably gonna be way cheaper doing that, rather than redoing all the work in converting a B16A to 2L.




[Modified by Katman, 12:19 AM 4/1/2002]

 

damn thats good! i have been looking in the B20VTEC threads trying to get the yes/no, with inconclusive results...

i guess i can have my 200 extra cc and keep my R/S ratio too - but at a big $$$.

can you ship blocks to Australia or know someone who would? a B20B long block is like hens teeth over here, the only one i can find costs US$1100.

but i want the B20Z anyways dont i, higher compression?

t..

PS terminologically,

"They stroke it by putting a wider piston in. That's another form of stroking...which is a lot cheaper than making a whole new crank."

should be expressed:

"They increase capacity by putting a wider piston in. That's another form of increasing capacity - boring...which is a lot cheaper than making a whole new crank."

 

Boring a b16a to the max (87mm) will give you 1840cc (I think if the b16 stroke is 77.4 but I can't remember exactly). You will not get close to 2.0L. However, you would have as much or more (depending on the bore) displacement than a b18c5 (type R) with a better rod/stroke ratio. Sounds good to me. Although it'll cost you ~800 to resleeve it and ~500 for bigger pistons and then labor to put it all together.

 

my response https://honda-tech.com/zerothread?id=156070