I would definetely scrap/return those pistons and get some with the proper
height.
Magnus Karlsson
BorC%s Motor Corporation AB
www.concourshealeys.com
21 mar 2011 kl. 21:52 skrev Austin Healey <pajtamuvek at gmail.com>:
> Does any of You know how much ccm the compressed gasket space can be?
>
> G
>
> 2011/3/21 Austin Healey <pajtamuvek at gmail.com>
>
>> Hi,
>>
>> I have just collected my engine from my machinist (rebore, crankshaft
>> reground, new cam bearings etc). For my greatest solace, he folloved all
my
>> instructions, soo all the clearances are accurate (=>
>> hipp-hipp-hurrey!!!!!).
>>
>> Now I have made some measurements with the new pistons.
>>
>> I had to experience that the new reproduction pistons are quite a bit
lower
>> than the originals! If You can remember, my engine is a "26H", soo may be
>> some kind of "special" engine. The original pistons came about 0.3mms
*above
>> *the dech height. The new pistons are 1.75mms below the deck.
>> I am using a 12 port head (non-original to this engine, original lost). I
>> have counted a rough 7.6:1 CR now with my new pistons. This is *very* low.
>> Whats Your opinion: shall I get the block skimmed by 2mms, and get the
>> pistons to the "original" height, skim the head, or skim both to get a
>> higher CR? What numbers to go for? 9.5:1? Or higher?
>>
>> Gergo
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