Is there any aftermarket parts for b17a, I know it's the same engina than a b16a but it would be great if eagle, probe or someone else would do b17 cranks and rods.

The rod/stroke ratio would be better than the b18 and with large bore piston it will be easy to hit the 1.8L. and keep the b16a stamped out in the block

 

Any b17a aftermarket crank?

 

The B17a engine is actually a Stroked b16a.

the main differences between the b16 and b17.

pistons B16 has a higher dome where the b17 has a near flat top. B16a comrpession is 10.2 vs 9.7 for the b17.

the stroke on the b16a is 77.4mm the stroke on the b17 is 81.4mm which increases displacement nearly 100cc's

the rods in the b16a are 134mm c to c the rods in the b17a are 132mm c to c.

other than that the engines are identical.

the stock cranks are forged and of very good quality and strength. Most of the eagle cranks i have used have needed at least a few hundred dollars in machine work to get them ready for use.

if you plan on using a b17a (81.4mm crank) in a b20 block you need to use a 140.8mm rod (c to c) depending on the compression height of the piston you use you might need a little longer rod or a little shorter rod. make sure to take measurements of the piston compression height before ordering rods.

b20 84mm bore with b17 81.4mm crank will get about 1817cc of displacement. and should rev like a b16

 

Would that be better than a b16a with b17a crank and rods and 84 or 85mm pistons?

I think this could be a 1.8L with not so bad R/S ratio (1.62), good for high rev and a more torque than b16a, and keeping all the vtec bottom end OEM advantage (oil squilters, and no need of vtec convertion kit).