Either way I go I am gonna go to an 84.5mm bore with ductile iron sleeves (2.0 liter). Now, I currently have a B16 that I could get the Ductile Iron sleeves put in and bored and all. Then I would probably go with a b20b/z crank. Now the advantages to the this are that I already have a complete b16, All vtec oil supply is there, The b20 crank will give me the added torque over the b16 crank, and it would only say "b16" on my block . Now, going with the lsvtec setup using the ls block and crank, the crank is where I would get that extra torque, correct? I currently do not have a b18a/b block and crank but I obviously could get one. The advantages here are that I would not have any down time, being able to use the ls crank will give me more over the b20 crank in the b16 block.
Only other question is, will the b20 crank fit into the b16 without having to get special order rods/pistons? Which would yield more horsepower if both given the same CR? Please give me some info.....I am stuck on what to do this winter??

 

B16 Deck is shorter..
you need special rod (custom rod)..


How about use your b16 crank in a b20 (b18b block) and custom rod.
you'll get a good S/R about 1.84 ..

 

How about keeping with the b16 crank in the b16 block and just going to 84.5mm bore? The reason for not going with the b20 block is because I want ductile iron sleeves anyway. So why not just do it to the b16 block I have instead of wasting money for a b20 block. Downtime is NOT a big deal what-so-ever. Then I already have the Vtec supply in the b16 block. Any other opinions?

 

the only difference between the ls and b20 short block is the bore size...everything else is the same.
that setup = poor tq...and defeats purpose of "B20VTEC"

are you going for na or fi?

 

Turbo

 

the only difference between the ls and b20 short block is the bore size...everything else is the same.

quote:
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How about use your b16 crank in a b20 (b18b block) and custom rod.
you'll get a good S/R about 1.84
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that setup = poor tq...and defeats purpose of "B20VTEC"
are you going for na or fi?



How about high rpm, 10000+rpm..

 

Let just say I keep the 10.2 CR that it has currently, what power gains could I expect from just the bore/new sleeves on the b16? What would that cut its rpm limit down to?


[Modified by shotty, 5:01 PM 8/12/2002]

 

i am a fan of the b20vtec (i am building one right now), but there are a lot of critics because of their bad r/s ratio.
seems to me that the power would drop off way before 10k

 

I am not saying b20 bad SR, i am going to built one too..(for street)

but me, i like RPM.. high end power,

it depand what cam you using, for ex, VTEC Killer cam, they make power in between 7500-10000 rpm range or more, ... .(Race motor)

 

What about the b18c crank is the b16a block? I guess Im looking for the best turbo applictaion using a b16 block bored to 84.5mm with ductile iron sleeves. Any other suggestions? Is it better to turbo a higher or lower SR ratio? or makes no difference?

 

If you use b18c crank in b16a ,you need custom Rod,
Custom Rod cost big $$$,
and You don't need vtec for turbo setup.

So, i would get a complete b18a or b with tranny, resleeves to 85 and some head work. Low CR piston.

correct if i am wrong,

 

you will need to do a lot more to a b20 in order to get to turn in the range you like. honda did not design it to turn that fast.
the ideal r/s ratio for the best all around power is 1.75. for example, a b17 crank in a b20 block is as good as it gets. i believe the b16 has the best r/s ratio from the factory

if i had to do it all over again, i would boost a stock b20 to begin with. then one day when it blows up i would sleeve it to 85mm, use forged pistons and rods, get necessary head components, have some machine work done and get the rotational assembly balanced

but thats me

 

Stock b16a2 rod ratio is 1.74
stroke 77mm
rod length 134mm

Wouldnt boring the b16 to a 2 liter be the same as a b20 but with the stroke/rod ratio of 1.74? I think I've figured the b20 isnt the motor for me because of its lower rpm limit. I want to be able to rev it out for the turbo. So boring the b16 to 84.5mm-85mm would yield what literage? and what approximate gains?

 

what about B16 crank/rods with B20 pistons in a B20 block? same R/S ratio as a B16 but with a 1.8L displacement.
stan

 

no, i wont quite even equal 1.8l
why do you want to rev to 10k?
i think there is more to it than that

do you just not have the parts or what. you are making it harder than it really is. unless you have a lot of money to try stuff, i would stick with traditional stuff


[Modified by Jeff C, 9:05 PM 8/12/2002]