I seen someone claims they put RSX pistons in a B20 block. can this be done?

 

B20 = 84mm bore. RSX (Type-S) pistons = 86mm. It could be done, but I would not want to try it on stock B20 sleeves.

 

Rsx = k series.
Enough said.

 

The valve pockets are cut at a different angle from the B to the K pistons...

K series valves are angled kinda like... | |

B series is more like.... \ /

K and B series compression heights are pretty similar but the K series piston does have a larger pin bore... If I remember correctly its the same pin as the H22???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rick Solis &raquo;</TD></TR><TR><TD CLASS="quote">The valve pockets are cut at a different angle from the B to the K pistons...

K series valves are angled kinda like... | |

B series is more like.... \ /

K and B series compression heights are pretty similar but the K series piston does have a larger pin bore... If I remember correctly its the same pin as the H22???</TD></TR></TABLE>

The k series pin is .035 larger than b series. Just ream out the b series rod to accept the k series pin. Ive never tryed it but it will work.

 

you can make anything work if you really want to. skunk2 tried using rsx pistons in their b series drag motor before (which included machining the valve pockets) , but the pin bosses on the rsx pistons are notoriously weak. exploding piston problems eventually claimed the engine