6 replies to this topic

[stretch tech]

hi all, i'm looking into upgrading my stage one 1038 engine and i was looking at using a cylinder head of a bigger capacity engine but i've seen that they need head work or new holes tapping to get them to fit. so my questions are

what is involved in getting a 1275 head to fit on a 998 block ?

which heads require the least work/fit straight on ?

which head will give the best results on my engine ?

cheers

Rhys

[jaydee]

This pretty much sums up.
http://www.theminifo...ds/page__st__15
Have a look at the posts from cooperman and bmcecosse, theres nothing else to say.

[stretch tech]

This pretty much sums up.
http://www.theminifo...ds/page__st__15
Have a look at the posts from cooperman and bmcecosse, theres nothing else to say.

cheers for that buddy so if i got a 12g295 head and some D top pistons would i have to skim the block and head at all ?

[jaydee]

At first you have to source the D tops, they go for top money, and i'd go for some quality flat tops instead. Plus i dont think they ever made oversize D tops.
To answer your original question, by fitting D tops and an unmolested 295 (2,75" height, 28cc chambers) you need no decking/skimming (a slight skim is advisable though).
Decking the block at TDC and skimming the cylinder head to achieve a specific CR is something you really look at when building an higher specced engine.
What head is currently fitted to your engine?

Edited by jaydee, 29 July 2012 - 02:24 PM.

[stretch tech]

At first you have to source the D tops, they go for top money, and i'd go for some quality flat tops instead. Plus i dont think they ever made oversize D tops.
To answer your original question, by fitting D tops and an unmolested 295 (2,75" height, 28cc chambers) you need no decking/skimming (a slight skim is advisable though).
Decking the block at TDC and skimming the cylinder head to achieve a specific CR is something you really look at when building an higher specced engine.
What head is currently fitted to your engine?

oh right, i didn't realise they were that rare i currently have a standard unleaded 1985 metro head which has been skimmed along with the head and stepped valve guides

[bmcecosse]

What are 'stepped valve guides' ??

[charie t]

What are 'stepped valve guides' ??

Valve guides with steps in
I'd go for a 12G940 casting. Last one I drove was actually a really nice pulling engine. Could be even better with a rolling road tune