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Home > Help Needed / General Tech Chat > High Compression

1380Turboman

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Member #: 221
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13th Aug, 2004 at 02:49:03pm

Hi everyone,

Just got my engine back from the tuners. Apparently its got high compression? whats this mean and what are the disadvantages.

I have had all the head work done I could.

Any ideas on how to lower this compression are is it ok?

PC

giallofly

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I helped keep this site alive!

4436 Posts
Member #: 164
The Stig..

Newport Pagnell

13th Aug, 2004 at 02:56:27pm

bigger piston dish or cumbusion chamber sizes are the two main methods.

Prepare yourself for a barage of answers!

Edited by giallofly on 13th Aug, 2004.

On 21st Jan, 2011 fastcarl said:

therefore acheiving two things , a sore knob and a beer bellyl

wil_h

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Betwix Harrogate and York

13th Aug, 2004 at 03:04:30pm

'It;s got high compression'?

What does that mean indeed? High CR? High boost? A 'high' reading on a compression tester?

I'd assume the last one but what does that tell you? The standard Metro turbo engine is essentially a high compression engine.

Wil

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



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


stuart gurr - vmaxscart

146 Posts
Member #: 350
Turboing minis since '89
Supercharging minis since '04

13th Aug, 2004 at 07:02:05pm

if it is a compression test pressure reading thats high could be
short duration cam - longer the valves are open the less air you compress
too high compression ratio- did you check the maths when building it ?
is it a problem ? does it pink ? ? bonus of this is less lag , downside is less boost can be used

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