B20 block with b16b internals ?


burkey0013

burkey0013

Member
Joined
Aug 6, 2008
Messages
347
Was this ever done before , is it like a 84mm b16b ?

What cc will it work out at and is there any issues that would happen with a b16b 81mm combustion chamber bolted to a 84 mm block ?

And there's 1mm difference between block/deck heights , any problems there ?
 
Last edited:
84mm would be standard bore size on b20. The compression calculator says in around 7.7:1 CR with b16 crank, 16b rods and b20b pistons. With PCT pistons you have 12.0:1 cr but I don't know what the piston to deck height would be with that combo
 
Ah my pistons are 84.5 so my b20 block must have been modded?
 
Vtec6000 said:
With PCT pistons you have 12.0:1 cr but I don't know what the piston to deck height would be with that combo
Click to expand...

I doubt 81mm pistons in an 84mm bore would make much compression at all... :p

Otherwise, an 84x77 B16B would be pretty awesome, B18C torque with 10k rpm capability! :nice:

However, I have a feeling the crank main journals are not the same size as the B18/B16, so I'm not sure it will work.
 
Kozy said:
I doubt 81mm pistons in an 84mm bore would make much compression at all... :p

Otherwise, an 84x77 B16B would be pretty awesome, B18C torque with 10k rpm capability! :nice:

However, I have a feeling the crank main journals are not the same size as the B18/B16, so I'm not sure it will work.
Click to expand...

So I've finally had a good idea :)..

The journal sizes are the same as lee on here is running a b18c crank in his b20 for 1.9l capacity..


Yes piston to deck height would be something to look into but I'm sure a set of flat head high comp weisecos would do the job ? :)
 
A pic of my pistons is on my cars thread if that's any use.
 
Kozy said:
I doubt 81mm pistons in an 84mm bore would make much compression at all... :p

Otherwise, an 84x77 B16B would be pretty awesome, B18C torque with 10k rpm capability! :nice:

However, I have a feeling the crank main journals are not the same size as the B18/B16, so I'm not sure it will work.
Click to expand...

haha, I guess I should have said if you were to use 84mm style b16b pistons
 
Q. Which block is better B20b or Z.
A. It depends on your application, The Z has a higher compresion and produces close to 20bhp more in stock form there fore for a basic build the Z would produce more power, But if you plan on fitting pistons and rods the B20b would be better as its usually cheaper to buy due to less power.

;)
 
Done some more research on this, seems to have been done in states more than once.. Seems to work very weell.. I have a few blocks sourced so I'm going to purchase one during the week..
 
burkey0013 said:
Done some more research on this, seems to have been done in states more than once.. Seems to work very weell.. I have a few blocks sourced so I'm going to purchase one during the week..
Click to expand...

just read this and i have a b20 block 85.5mm with cp high compression forged pistons and full vtec conversion kit and matching cometic headgasket for sale if your interested i bought it as im putting the crank and rods in a b18 to get more stroke, and because i ****** my b18 crank when i spun a bearing!
 
wassboy999 said:
just read this and i have a b20 block 85.5mm with cp high compression forged pistons and full vtec conversion kit and matching cometic headgasket for sale if your interested
Click to expand...

you need 250 posts to advertise a sale on this forum pal
 
You must log in or register to reply here.
Back
Top