B16A2 -> B18A1
 

I was looking into it and i was thinking about after market pistons and rods for my b18. i stumbled across an article about how the b16a2 has a 1.74:1 rod ratio compairied to the b18A1's 1.54:1 they have the same bore but the stroke is shorter (77 for the b16 and 89 for the b18). i was wondering if putting aftermarket b16 rods and pistons would be better then going with the b18 aftermarket rods and pistons. Also whot would happen if i did.

Re: B16A2 -> B18A1
 

im guessing that the deck height is alot taller on the b18 as well, so i am guessing you'd drop the compression de-stroking the b18 like that.

Re: B16A2 -> B18A1
 

it would drasticlly drop the compression, you dont want to do that, aftermarket b18 rods will be just as strong as aftermarket b16 rods....

Re: B16A2 -> B18A1
 

putting b16 rods and pistons in will go higher than the deck

Re: B16A2 -> B18A1
 

the b16 block is 8mm shorter then the b18

Re: B16A2 -> B18A1
 

b16 rods are longer i do believe

Re: B16A2 -> B18A1
 

b16 - 134, b18 - 137 rod lengths

Re: B16A2 -> B18A1
 

in that case do it and shorten the block
but the really is no point

Re: B16A2 -> B18A1
 

Also stock the b16 has a c.r of 10.2:1 while the b18a1 has 9.2:1

Re: B16A2 -> B18A1
 

Teh point is the rod ratio

Re: B16A2 -> B18A1
 

Anyone? im guess the cr will drop but not drastically and ill have the benifit of a better rod ratio.

Re: B16A2 -> B18A1
 

that isnt de-stroking since the crank is staying the same, and i dont think there is a point to doing what they are talking about anyway

Re: B16A2 -> B18A1
 

bump

Re: B16A2 -> B18A1
 

wrong! I learn that at my own expense, I ordered b18 rods when was building my b16 motor the pistons stick out of the block about a 1/8 of an inch, so I had to order b16 rods, and sell my brand new b18 rods for $100 cheaper than I paid for them.