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vlad01 wrote:yeah they are the ones im getting. Hoping to get the ACL ones as they come in 20 and 40 over, the mahle ones only 40 over which is unnecessary for bore than virtually dont wear.

didn't think you could get any ACL stuff anymore ?

Seriously considering getting some custom ones made up.

Holden202T wrote:

vlad01 wrote:yeah they are the ones im getting. Hoping to get the ACL ones as they come in 20 and 40 over, the mahle ones only 40 over which is unnecessary for bore than virtually dont wear.

didn't think you could get any ACL stuff anymore ?

think you can as SRE and portcity engines are building Buicks with 9.7+ CR, so I heard they use ACL pistons. hypatec do not offer anything like that.

TdracerTd wrote:Seriously considering getting some custom ones made up.

my brother is looking into the same thing for his, he reckons JE, Keith Black and another do them in the states for $500-700 us .... hopefully there is something more Australian though ....

thinking same thing here, was searching for 3800 series 1 pistons with no luck.

our buick v6s dont seem to exist in the USA in terms of aftermarket performance parts.

The other option is custom rods to make use of all the ecotec pistons out there.

vlad01 wrote:thinking same thing here, was searching for 3800 series 1 pistons with no luck.

our buick v6s dont seem to exist in the USA in terms of aftermarket performance parts.

The other option is custom rods to make use of all the ecotec pistons out there.

Even the ecotec Pistons I found have a slight dish.

I know flat tops have existed as I have a set in the motor I bought. Unfortunately no3 and no4 have cracked ringlands.

TdracerTd wrote:

vlad01 wrote:thinking same thing here, was searching for 3800 series 1 pistons with no luck.

our buick v6s dont seem to exist in the USA in terms of aftermarket performance parts.

The other option is custom rods to make use of all the ecotec pistons out there.

Even the ecotec Pistons I found have a slight dish.

I know flat tops have existed as I have a set in the motor I bought. Unfortunately no3 and no4 have cracked ringlands.

its only 6cc iirc which is huge boost in CR over the 25.5cc stock buick ones are. You can buy them flat top too, diamond do them. Ask sicsix as they regularly have flat tops made and imported to their specs.

here is a site I just quickly googled that offer many specs for the diamond pistons and even have drop down option for custom ones.

http://intense-racing.com/PROD/PKC-xxx.html

correction: ecotec ones are about 4cc dish, its tiny!

with custom rods you can take advantage and decrease the deck, stock vn/vp I measured about 1mm. you could in fact run 0 or even -ve deck like the ecotec does and get some real high CR ratio even with stock ecotec pistons. you'd easy get over 13:1 doing that.

the combustion chambers on vn/vp are tiny compared to ecotec and even smaller on vr again.

Yes, that is one of the reasons for staying with the l27. Ie small combustion chambers. I think the simplest solution and probably the least costly would be some custom Pistons. I could comes at $1000 for a set. It would hurt, but I could talk myself into it.

maybe an option?

Not sure how compatible the old school pre Ln3 buick pistons are in our series 1 buicks?

http://www.taperformance.com/proddetail ... d=TA_V1602