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Can a 885 head be replaced by a 731
Posted: Thu Jan 24, 2013 2:08 pm
by jimlad123
Hi,
The 885 head on my 2.5 has cracked and i have a 731 head hanging around but it's from a 2.0.
Would I be able to fit the 731 head without any problems (apart from slight power loss!)??
If not if anyone has a cheap head that will work for sale let me know!
Cheers jamie.
Re: Can a 885 head be replaced by a 731
Posted: Thu Jan 24, 2013 4:37 pm
by maggspower
No the head won't fit as the 325i pistons stick above the block and the 320i ones don't. So the pistons will hit the 731 head.
I have rebuilt heads, they are cheap, for a rebuilt head, but not cheap compared to a worn out head for £100 in need of a rebuild
PM me if you are interested.
Re: Can a 885 head be replaced by a 731
Posted: Thu Jan 24, 2013 5:32 pm
by HairyScreech
Without modifying the head no, replace an 885 with an 885 and a 731 with a 731.
However Byron that 731 test head i have used to live on a high comp b25 bottom end.
Re: Can a 885 head be replaced by a 731
Posted: Sat Jan 26, 2013 4:01 am
by basketweave
My next stroker build I want to do I am going to use a 731 head, so I can run flat-top pistons and get the compression right up. Just trying to find a 731 head here in Aus is a bit a of a challenge unless I buy a whole motor which i don't have room for...