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Hello everyone i was wondering if i should stick with my jdm b16a block and build it up for more potenial or upgrade to a b18c1 i currently have a b16a2 jdm 10-4-1 comp not sure i i should go b18c1 because of the torque advantage please give me ur taughts on this
 

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BOFODEZNUTZ said:
Hello everyone i was wondering if i should stick with my jdm b16a block and build it up for more potenial or upgrade to a b18c1 i currently have a b16a2 jdm 10-4-1 comp not sure i i should go b18c1 because of the torque advantage please give me ur taughts on this

depends on what you wanna do w/ your car
 

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If you use a JDM SiR-G B18C block, then you will keep the same compression as your JDM gen-2 B16A (~10.4:1).

If you use a USDM B18C1 block, your compression will be lowered to 9.8:1. You will have more torque from the extra displacement, but you will have less compression so the power gain won't be all that significant, if there is any at all. You would have to use a thinner head gasket to gain some compression back.

If you want to do this with a USDM B18C1 block, I would suggest also installing JDM ITR or CTR pistons, ITR/CTR cams, and ITR/CTR valve springs. Then you will have the "poor man's R" engine.

Also, to give you an idea, compression numbers are as follows:

USDM B16A2 - 10.2:1
USDM B18C1 - 10.0:1
USDM B18C5 - 10.6:1
JDM gen-2 B16A - 10.4:1
JDM SiR-G B18C - 10.6:1
JDM spec-R B18C - 11.1:1

USDM B18C1 block + B16A head - 9.8:1
JDM SiR-G B18C block + B16A head - 10.4:1
B18C block + ITR pistons + B16A head - 11.1:1
B18C block + CTR pistons + B16A head - 11.75:1

These are all with the OEM 3-layer head gasket.
 

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if you are wondering why the compression goes so low w/ a b16a head on a b18c(1) block it is due to the design of the combustion chambers
 

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Targa250R said:
Yeah, that's always the cheapest option. :rolleyes:

word.....i dont have $2500 to buy a brand new b18c5 block from honda
 

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MugenSi said:
Exactly 2,325!
yes because i should buy a block for that because i can't build a better just as reliable b16a block for cheaper......:rolleyes:
 

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Mattamotor said:
I could sell an entire B18A1 swap for less than that.

yeah you can pick up an entire b18a swap for under 1g
 
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