182 / 172 head and block differences

[HrRACING]

Hi all, does anyone know of the differences between the 182 and 172 engines, for thw ph1 and ph2s etc etc.


I am looking to build a competition engine, with a spare and need to know which is the best to use.

Cheers in advance,

Hal

 

[mr.pink87]

ph1 engine is best imo: bigger exhaust ports and slightly higher compression (11.2:1 instead of 11:1) irc. Not much difference in between these engines. As it's going to be a competition engine and you'll rework the head/pistons anyway, it really doesn't matter.

 

[Dan519]

Doesn't make much difference. Ph1 head is easiest to start with as you have larger exhaust ports, but nothing you couldn't replicate on a ph2/182 head (as I've done a number of times)

Nothing else that makes any difference is different. Someone pointed out the cranks have a couple of versions, but I've seen nothing better or worse about any of them.