low comp engine

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Oct 15, 2006 | 10:02 PM

Maxxeh

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From: middlesex

low comp engine

hi guys, what does low compression pistons actually do? im a n00b at this. whats the advantages?

Cheers.

Oct 16, 2006 | 12:02 AM

scotty86d

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From: Uxbridge/Brighton

means you can run more boost generally(if you dont have a flash engine manament systems) with a lower risk of detonation i think
throttle response off boost suffers though

Oct 16, 2006 | 10:18 PM

Maxxeh

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From: middlesex

ive got the .5 mahle low comp pistons. i read sumwhere that they dont like to be redlined. is this true?

Oct 16, 2006 | 10:59 PM

Andy_R

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From: Glasgow, Scotland

.5 relates to the piston being .5mm oversized.

Lowering the compression ratio increases the scope for additional ignition advance and or boost.

Oct 17, 2006 | 05:32 PM

steven botes

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From: south arica

ran Mitsubishi Tredia/Vortex Turbo 1800 4g62b 80.5MM pistons for 5 years at a cr of 6 to 1 - ran 2 bar boost with a t34 on pump fuel without too much stress , donkey low down but strong past 3k

Oct 18, 2006 | 06:39 PM

NEWTON

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From: under the bonnet

Quote:

Originally Posted by steven botes

ran Mitsubishi Tredia/Vortex Turbo 1800 4g62b 80.5MM pistons for 5 years at a cr of 6 to 1 - ran 2 bar boost with a t34 on pump fuel without too much stress , donkey low down but strong past 3k

comp ratio of 6-1 thats a bit drastic ant it