SX/SXi/SXi Pro Help determining which PJS head to use

[firehousefabrication]

Hey everyone,

I'm new to the stand up world. When I got my ski (93 sx), it came with two PJS heads. One is a large dome with almost no squish band area and the other is a small dome with some room for a squish band. Im really just looking for some ideas on which to use. The ski is a big pin motor with dual carbs, pjs pipe, lightened flywheel, and weisco pistons. I will attach some pictures to clarify the heads. I appreciate all the help in advance. Im new to these things so let me know if Im missing anything.


Thanks
Grant

 

[firehousefabrication]

anyone?:Eyecrazy:

 

[Jeepster575]

If it was me, I would use the first one you mentioned, it should raise the compression and then I would get a timing advance kit which is about $50 bucks and run race gas in it to get some good power out of the ski......but that's just my two cents.