3 replies to this topic

[starletman]

I will soon be putting a 1098 in my car and want to know what heads will bolt straight on without pocketing the block.I have a selection to choose from 12G292 and 12G940.

I would like the 12G940 but believe this requires pocketing,any ideas on the cost of this.

[stretch tech]

Any heads originally fitted to the small bore engines will be bolt on so to speak

12G295 - cooper head (pricey)

12G206 - same chamber volume as above but smaller valves I think

12G202 - standard 1098 head I believe and I think it's a good upgrade from the standard 998 head

And there's also the heads off of the 850 engines but I don't think that's what you are looking for

I've never heard of a 12G292 before ?

Rhys

[jaydee]

Other small bore castings are the 12A1456 as used on the racing-checkmate minis and the J type as used in ministox 

You need to pocket the block or sink the exhaust valves to use a 940 head, but certainly it will be the best 'bang for buck' mod.

[Stiggytoo]

You never know - a 12G940 might fit without any modification (apart from water pump...)