Turbo engine advice
Turbo Mini Forums

Hi there Im from nz and I've never tried turboing before.

I have a rebuilt 1275 block and gearbox. I also have a metro turbo kit.
Block is factory spec non turbo 1275 but has a cam grind.

I have two heads one is a new 1275 11 stud head
One is hugely ported and polished and has competition valves but is skimmed alot..

If I'm not wrong a factory head is 2.75 inch so 7 cm. The skimmed head is approximately 6.8 cm. ..

Any help/suggestions welcome.

What pistons are fitted ? If you can get a sensible compression ratio with a suitably dished piston then you may be able to use the modified head, though you need to measure the chambers so you can work out the compression ratio as it looks like it's heavily skimmed.
Also if the valve sizes are very large it may not be ideal on a turbo motor in the interest of reliability.

Phil.

WWW.TURBO-MINI.COM

So cc in the modified head is 22 that I work it out at..... pistons are factory 1275 dished pistons

Hopefully this photo works

Attachments:

1.25mb

One is the new stock head other two are modified head. Would a factory block hold up to small amount of boost? Once finished it will only be used for a Sunday drive probably every month haha

Attachments:

1.83mb

1.81mb

1.95mb

So I just measured up new head and came up with 20 cc am I doing this right?

Potentially in the ballpark.
There are lots of YouTube vids on measuring chamber volume; I've seen some where they use a burette and others using a large syringe. A burette is very easy and more accurate than a syringe for this, and plastic versions (better for the garage) can be purchased for only a few quid off eBay/Amazon, etc...

Yeah I used a siringe and oil and there what I got