If you want to fit a 2.7 diff - then don't go beyond an MG metro cam - and do fit new cam followers with it - and do NOT fit 1.5 rockers! I agree with Nightrain - the 276 cam (ie ~ BMC 731) can be quite disappointing - however the 286 (~ BMC 544) cam is EXCELLENT - but does need some revving. Check what diff you have - it may be a 3.1 alraedy - in which case hardly worth changing it.
But I do worry that you don't understand bores and pistons - or how to change a diff - and yet you are planning on fitting a camshaft and presumably all the other work that entails ? What else has been done to this engine ??
If you want a bit more power -you should look for a 940 head with the larger inlet valves - these were on early MG Metro engines although I think by the time GTA came along - they had reverted to the smaller inlets. Measure them anyway - what size are they ?
Engine Rebuild.. A Bit Stuck On What To Do Next.
Started by
dansalter
, Aug 02 2009 01:49 PM
19 replies to this topic
#16
bmcecosse
-
- Members
-
- 9,699 posts
Crazy About Mini's
- Local Club: http://www.srps.org.uk/
Posted 02 August 2009 - 06:42 PM
#17
dansalter
-
- Noobies
-
- 126 posts
Mini Mad
- Local Club: Sutton Coldfield Mini Club
Posted 04 August 2009 - 10:26 AM
sorry i haven't replied in a while, i'm afraid i had an operation yesterday, just dental stuff, nothin serious but was under general anesthetic.
at the moment the engine is in pieces and i must admit this is the first engine i have had apart but luckly my dad has rebuilt a few engines in his time and knows more than i do but i am learning. the head is a 12g940 does this mean that it does have the larger valves or are there variations in the 940?
i will check the diff and if it is the standard would the fast road cam be suitable if i used a 3.1 diff instead of going for the 2.7? as i'm looking at more motorway work in the future and as much as i can do while the engine is out to prepare the car for this would be great.
at the moment the engine is in pieces and i must admit this is the first engine i have had apart but luckly my dad has rebuilt a few engines in his time and knows more than i do but i am learning. the head is a 12g940 does this mean that it does have the larger valves or are there variations in the 940?
i will check the diff and if it is the standard would the fast road cam be suitable if i used a 3.1 diff instead of going for the 2.7? as i'm looking at more motorway work in the future and as much as i can do while the engine is out to prepare the car for this would be great.
#18
Turbo Phil
-
- TMF+ Member
-
- 2,426 posts
Up Into Fourth
- Location: Cumbria
- Local Club: Cumbria Classic Mini Club
Posted 04 August 2009 - 04:05 PM
Mesure the inlet valves, if it's a standard head it will be either 33.3mm, or 35.7 if it's an early MG Metro. 940 is just the number for the casting.
#19
bmcecosse
-
- Members
-
- 9,699 posts
Crazy About Mini's
- Local Club: http://www.srps.org.uk/
Posted 04 August 2009 - 04:12 PM
3.1 diff will be fine - good compromise.
#20
dansalter
-
- Noobies
-
- 126 posts
Mini Mad
- Local Club: Sutton Coldfield Mini Club
Posted 04 August 2009 - 05:29 PM
just measured it n it looks too me like a standard head=[.
i'll start looking for a 3.1 diff then.
any idea where i can get one from? as i have looked on places like mini sport and jonspeed but can't find them.
thanks alot guys.
i'll start looking for a 3.1 diff then.
any idea where i can get one from? as i have looked on places like mini sport and jonspeed but can't find them.
thanks alot guys.
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users
