7 replies to this topic

[.998TANGO.]

just been checking my 1275 a series block over before i send it to the engine shop for a rebore etc etc, but ive found a hole in the block which doesnt look like its part of the casting. is a normal thing or is the block scrap?

thanks

[MRA]

Yep...... it's normal for some A series blocks, not recomended for serious BHP or RPM though

Edited by mra-minis.co.uk, 13 March 2010 - 03:20 PM.

[.998TANGO.]

what sort of bhp/rpm would be a recomended limit?my long term plan is to add a supercharger, stage 3/4 head get to around 100bhp. i dont intend to go over 7000rpm but to start with its just going to be a basic 1293 with 270 cam.

thanks

[R1minimagic]

You can get 100bhp quite easily without a supercharger!

[Sprocket]

Has any one heard of one of these blocks with the hole over the center main bearing, failing? It will be fine

[mk3 Cooper S]

You can get 100bhp quite easily without a supercharger!

Can you?
It is down to budget I think!!

[mini13]

as Sprocket says dont worry about it,

In fact i'm running one of these blocks in my turbo lump, I just smoothed the edges out with a grindstone and file.

[bmcecosse]

They do tend to crack through - and then the centre main is not supported anymore! It will be fine with your initial plans - but I would search out a later block for the BIG plans!