EkChuck

Looking for everyone's option on this, how reliable is a b20z bored to 85mm with r-spec pistons with a gsr head? I keep reading death storys of these things being destroyed,and weak cylinder walls. The car will be broken in correctly and will hit the dyno to be tuned pretty quickly. Im looking for a dependable all motor daily, no boost.

Bowman

where everyones weak link is in the chain .will help build your chain stronger >>others mistakes let them be a guide,as to mistakes you dont have to make

raverx3m

iTrader: (1)

the chain?
above post makes no sense at all


you obviously building it for more power and chances of you driving it like its a d15z1 from ecomodders is pretty slim

so if you see alot of horror stories with 85mm why not stay with 84.5 max like many people suggest?
spend some time on the head and cams and top end will make up in that power that you lost by staying 84mm

EkChuck

lol yeah im lost by the above post myself, its a block up for sale so its built with 85mm pistons in it. The price sounds good to get me back on the road, but i want it to last.

Bowman

I was Metaphorically speaking.....>>do it right, Do it once,! 84.5 = no horror stories!

raverx3m

iTrader: (1)

Is it sleeved? If so then its a different story.
One reason for going 85mm is it was damaged and bored out to the max.

With 85mm you dont have any wall to go if you decide to rebuild it

EkChuck

Nah not sleeved, stock.

On another note nice numbers on your build.

jazzRS

there is a thread around here somewhere of b20v mileage and there are plenty of people getting lots of miles on 85mm. its all in the tune

GIZZ - EXV

this post, https://honda-tech.com/forums/all-motor-naturally-aspirated-44/%2A%2A%2Aofficial-all-motor-stock-sleeve-b20vtec-thread%2A%2A%2A-1555476/

EkChuck

Thanks

1998GsRIntegra

If you plan on circuit racing it, plan to crack a sleeve in the same spot the B20's always do.

seelback

if it has a block guard, clearances properly spec'd out, engine properly assembled, no corners cut, and a good reliable tune.............then you should be fine. my tuner made 700whp with a 84.5mm stock sleeve b20 with a ge block guard. most stock sleeve b20vtecs that ive seen are hacked up setups.