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Home > Help Needed / General Tech Chat > Standard Piston/compression ID/Info

Turbo Phil

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4634 Posts
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My sister is so fit I won't show anyone her picture

Lake District

23rd Apr, 2013 at 10:04:39pm

I'm trying to find any info on some A+ 1275 pistons marked 21268 g8 j39. They're dished & were fitted in aMetro 1275 engine.
I don't have them to hand so can't measure the dish or how close they come to the block at TDC.
Does anybody have any idea what compression ratio they give on a standard motor ?

Cheers
Phil.

WWW.TURBO-MINI.COM


BENROSS

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Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

23rd Apr, 2013 at 11:54:01pm

philip they were fitted to some metros and maestros and montegos they are AE pistons and are fine for N/A use they sport a cr of 9.75:1 with 21.9 ccs in the head






Alex

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Woolavington, Zummerzet

26th Apr, 2013 at 11:48:15am

I think they are the "normal" compression pistons - with the 21251s as the low and the 53s as the high, so ought (in theory) be halfway beteen the two...

Metric is for people who can't do fractions.
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