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Decompresion plate???
#1
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2003/3/21 0:15
From Tamworth, NSW
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Thinking of a cheaper way to get lower compresion in an a12 rather than buying forged pistons. if i use a decompresion plate will it affect the valves??? an how strong are the standard pistons? i have heard they are a bit weak. thanks guys

Posted on: 2005/11/12 4:49
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A14force
Re: Decompresion plate???
#2
No life (a.k.a. DattoMaster)
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From Christchurch NZ
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No it wont effect the valves.

Posted on: 2005/11/12 21:05
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Lemonhead
Re: Decompresion plate???
#3
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I got mine from ACL Specialised Gaskets. Ph: 07 3365 0799 Cost about $50


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Posted on: 2005/11/12 21:57
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qik1000
Re: Decompresion plate???
#4
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I don't think the pistons are weak, but I've never played with A12's. A decompression plate will reduce the squish clearance and may infact promote pre-ignition rather than retard it. What's the puropose ?? Turbo ???

Posted on: 2005/11/13 3:38
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pager
Re: Decompresion plate???
#5
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yep a turbo. any ideas how thick i am aiming for around 7.5-8:1 comp. yep its gunna be big boost.

Posted on: 2005/11/13 22:28
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COUP1200
Re: Decompresion plate???
#6
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Stay away from them. Decompress it properly. using a decomp plate could stuff up all the rocker geometery.
If your running big boost put forgies in it anyway. You mayaswell build it reliable
coops

Posted on: 2005/11/13 22:46
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pager
Re: Decompresion plate???
#7
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cost don't forge pistons cost abit (1000+)??? yer thought the would muck up the valve train. can you buy shorter rods?? are they cheaper

Posted on: 2005/11/14 1:41
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A14force
Re: Decompresion plate???
#8
No life (a.k.a. DattoMaster)
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Muck up the rocker geometry? The shims come in .7mm and 1.5mm. All you do is adjust the tappet to compensate.

Posted on: 2005/11/14 7:22
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