2 replies to this topic

[Minidarren83]

Hi there I need a little help I have just purchased a 1275 gt a series short motor that has need bored +20 ie 1293 I bought it mainly for the pistons as they are flat top high comp ones and are almost new so my question is can I use the gt rods from the a on my a+ crank in my a+ block? Are the big ends the same size and is the stroke the same ad a+

If this sounds confusing at all I will try to be clearer lol

Cheers Darren

[Guess-Works.com]

Yes you can, most things are interchangeable between A series and A+, as long as you're not trying to cross from 998 to 1275 and vice versa and Cooper S parts are pretty unique to the engine.

In preference, I would rather use A+ rods over GT rods...

Just because it's flat topped down not mean it gives a high compression, there are a lot more other factors to take into consideration apart from piston dish.

[Minidarren83]

Thanks for the fast reply just one other thing are the cranks the same? The crank that came with the gr block needs a grind but my a+ one is mint

I got the fat tops so I could control my comp ratio with chamber work rather than skimming off block and head or is this the wrong way to look at it?