Alrights heres the deal i have a B20 block im buiding and i accumulated all my parts.. heres a rundown of the block setup... B20B Probe h-rods, arias 84mm dome pistons 11.8 compression stock bore 84mm and a block guard... took it the the machine shop and i just heard from them today... i guess the block cylinders are out of round and i iether need a new block to run those pistons or i get bigger pistons... i have been having trouble finding another block for a decent price so im looking at pistons...

now he said i can run the 84.5mm perfectly but my question is would the stock cylinder walls hold???

this isnt going to be boosted... but i know the b20 is already known for thin walls...
the whole rotating assembly is going to be balanced... i plan on reving no more than 8K, cuz thats where the cam should peak at... so what you guys think??

 

Should be okay! Alot of us have overbored the stock cyliders; 8k+ miles on mine with 12.5:1 and hard use. Obviously you'll have to get new pistons. New arias pistons $400, new B20 block $100. Choose wisely

 

i havent been able to find a block... and the best price for the pistons ive found was 470 shipped... so im slight bit torn...

heres my set up:
B20B
Stock balanced crank
Probe H-beam forged rods
Arias 11.6:1 Pistons
Block guard
ARP studs

P-75 Head:
Port / Polish
Ferrea SS valves
Crower Dual valve springs
Crower Titanium retainers
Crower 403-2 Camshafts

Add-ons:
Skunk-2 Adjustable gears
Skunk-2 Port matched/polished intake manifold
Hondata intake Gasket
S2000 Throttle body
AEM FPR
AEM Short Ram
Greddy 4-2-1 Manifold
MSD SCI Box w/ blaster 2 coil
MSD wires
Buddy Club Exhaust

lS Tranny w/
Carbon Coated Synchros
OBX LSD

now another question should i get some 310cc injectors or should the stock 240cc do?