3 replies to this topic

[JustSteve]

First off, I'm not talking about 1330 as most people seem to think. 1340, being a short stroke 1380.

I'm building a mini for the weekends. I dont intend on driving it daily, or racing round tracks. I'm just looking for as much fun as possible.



I have three blocks and three cranks. All could do with a re-bore and re-grind.



Asides from any cost factors, what's the pro's and cons or running a 1340 over a 1380? I've heard lots of people say that they wished their 1380's would rev more, but seems to be a difference of opinion over 1340.

I'll be bolting a turbo on but won't be running massive boost.

[Wil_h]

The thing is with a turbo is that RPM is not limited by the usual factors. For one you'll run a mild cam.

Better to run a standard stroke and minimum overbore to clean up bores. a 1275 will still happily make 200 bhp with boost

[John H]

Agree with Wil. Don't go silly on the spend just a nice strong bottom end and wind the boost up.

[Archived2]

1293 light rebores with decent pistons can give great results.
As the guys have said above, 1275 engines are more than capable of very good BHP figures indeed.

The people I have seen with 1380 engines with turbo's seem to have more head gasket issues? maybe the thin wall between 2 and 3 cylinders? Not all but enough to have put me off going this route.