I am getting head shims laser cut from mild steel to suit my GX head, to bring the comp ratio back down to allow me to use pump fuel. This SHIM will suit other A-Series heads that have had the buggery milled off them.

2.0mm -AUD$40.00

2.5mm -AUD$40.00

3.0mm -AUD$40.00

Wouldn't mind some extra $$ on top of your payment to pay for the drawing which I did myself (that's up to you though, I know how the Datsun budget is), also remember postage costs.

Take the opportunity to get them for cheap, seeing as the drawing has been done for you already.

Please email me ASAP [address in profile] if you are interested and tell me what thickness you want. The bore on the shims are 78mm so if you want any specific size then let me know and I'll adjust the drawing to suit.






Here is the thread that this all came from; Decreasing Comp Ratio - copper gasket or chamber expansion?


EDIT: Cheap option for you turbo freaks too? Instead of paying to install big dish pistons use a head shim until you get the funds to replace the pistons (and re-build).

Or for those guys trying the rescue that over-milled speedway head- here's your chance.