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piston & block help


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#1 mini_ron

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Posted 12 May 2005 - 09:00 AM

can anyone tell me exactly what pisons i have?

bought this block and ive been told its 1380 from MED but im not so sure!

can anyone help?

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#2 Guess-Works.com

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Posted 12 May 2005 - 09:19 AM

from a quick glance they look like omega's whic would tie in with the MED theory...

What are the numbers/letters on the top and looking from underneath they should say omega


ps. looks like very nicely done too.... just slightly jealous.. How much OOI

Edited by GuessWorks, 12 May 2005 - 09:20 AM.


#3 Dan

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Posted 12 May 2005 - 12:45 PM

Yes they look like the ones designed to go with MED's wedged heads (a trick to reduce chamber volume and hence increase CR even further without clearance problems). Very nice.

#4 a2lt16v

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Posted 12 May 2005 - 01:17 PM

would that not decrease the compression ratio having a cut out

give me the engine then you need not worry what they are

they are shiny and i want them :smartass:

#5 Jammy

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Posted 12 May 2005 - 01:20 PM

Depends how they work. I'm guessing the pistons go up into the combustion chamber of the cylinder head, where the combustion chamber is shaped to mirror the shape of the piston??

#6 mini_ron

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Posted 12 May 2005 - 01:22 PM

from a quick glance they look like omega's whic would tie in with the MED theory...

What are the numbers/letters on the top and looking from underneath they should say omega


ps. looks like very nicely done too.... just slightly jealous.. How much OOI

they have
OMEGA 1003/D
CYL BORE 73.5

written on top

cant see the bottoms, too dark :gasp:

thaks guessworks, didnt pay much for it, cant wait to get to use it!

#7 Bluemini

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Posted 12 May 2005 - 08:56 PM

Its a 1380 by the sounds of it :huh: Plenty of meat between the centre bores too.

#8 mini_ron

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Posted 13 May 2005 - 10:39 AM

thanks all

do i need anything special to build it up? i have a taget of around 100bhp without turboing

#9 minimadjonesy

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Posted 13 May 2005 - 11:12 AM

a decent gearbox for a start! try asking Guessworks to sort one out for you, SCCR would be my choice!

Also a decent staged head, stage 3 at least should give you that 100+bhp you're looking for!

#10 Dan

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Posted 13 May 2005 - 11:38 AM

If those are the MED pistons then you'll need one of their wedge ground heads or it'll not work well at all. You get higher CR as MED leave pretty much no chamber in the head at all, and wedge the bottom of the head (I think that's how they do it, and then they do something funky to the stud and pushrod holes) so that the valves come down at an angle and dip into the cutouts in the pistons, very high CR and very low chamber volume.

#11 mini_ron

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Posted 13 May 2005 - 12:21 PM

oh not well at all?

how much are these heads?

yer im on the look out for a gearbox!

#12 Jammy

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Posted 13 May 2005 - 12:55 PM

I should imagine a MED head would be upwards of a few hundred quid, depending on what spec you want!

I wonder why someone choose to split the engine in this way? It seems like it should be something that comes as a whole package or not at all!

#13 Guess-Works.com

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Posted 13 May 2005 - 01:21 PM

Gearbox, did I hear someone mention a gearbox.... lol

#14 mini_ron

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Posted 13 May 2005 - 05:23 PM

ahh would you think i could use a modified 1275 head?

yer guessworks, i need a gearbox

#15 Bluemini

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Posted 13 May 2005 - 06:17 PM

To drop the c/r you could get the pistons dished, any decent engineer could do it for you.

An MED head will be big money, but they are one of the best producers around I'd say, and worth every penny!




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