Low Compression Engines
Turbo Mini Forums

Just been browsing the web and came across this page with shows compressions on minis and metros as low as 8.0:1 in standard form?? Surely this would make a good cheap turbo engine?? For a decent 100bhp??

http://www.manchester-minis.cwc.net/techni...ngine_types.htm

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

But the pistons are not very good in them

Metro turbo weekend driver,Mini turbo in the making again!

How are these standard engine achieving this compression ratio? Is it due to the pistons/Head/Both??

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Hi,
Pistons. Different dish / comp height
Cheers,
Gavin :)

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My Mini build diary

i had a low compression 998 metro it was a snail 70 mph tops

so what about low comp with a turbo, cheapo,

the low comp metros used the dished version of will-h/ben-h's previous pistons did'nt they

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

What pistons are these??

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

What pistons are these??

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

ae 20773 for the 998, i think they are about a 6cc dish, someone on here will know the 1275 version, or if not i can find out monday!

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

The low comp pistons are shite and in my eyes would not stand up to boost at all well.

did'nt will-h/ben-h get up to 18psi then they foobarred! but had a season ot two pretty reliable at 15psi, thats under sprinting/hillclimbing stress's, thats gotta be more greaf than road going tasks! no more the 12psi & 10psi general driving!

will=h/ben=hs were flat-tip pistons though, i'd have thought the material would be the same on the dissed type

i dont mind being corrected if i've made a boo boo though lool i may have done!

SKYLINES ARE LIKE CLITS, EVERY FLANGE SEEMS TO HAVE ONE: see this sticker on my silvia

the Search-section on this forum is blummin superb & simple to use, unlike some other forums, without the search-section & the help of this bunch of chaps on here i'll never be able to !!!Start the day with a 998cc turbo!!! :) i'm getting closer though!

Tom Fenton says: I have it all, make me an offer

We use the 20773s for 3 seasons without failure at 18psi. We only started having problems when we put the T2 on and it all got a bit hot (read det).

It's all academic anyway. All of the low compression engines that you will find now will have been to the moon and back so are going to need a rebuild.

If you're doing a rebuild then you can put what pistons you like in to get the CR you want.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph