E-SPec pistons

[akhilleus]

I was just readin someones thread and they had 1.8l 323 with 9.7:1 pistons. It was an Espec familia. Are there any 9.6-9.7:1 compression pistons for the 2.0L. I already know about the j-spec 10.4 and 10.7:1 pistons. I also just did a search and australia has 9.7:1 is this correct and can i get those pistons without a engine management unit. I am gonna pm our resident aussie twilight too about this.

 

[TheMAN]

espec 1.8l 9.7:1 pistons become 10.2:1 when used with the 2.0

the faq has ALL the info about this

 

[twilightprotege]

yay resident aussie

 

[akhilleus]

I emailed corksport about these pistons and i gave them the part #'s. Hopefully they will carry the e-spec and Aus-spec pistons. Although i am not sure as to what gains to really expect. twilight is gonna talk to mazda too. There are 2 different kinds. A 9.4:1 for the 1.8L that has oversizes. And a 9.7:1 for the 2.0L. I would think that a gain of 6-7whp from the 9.7 pistons could be possible. Although twilight dynoed @103+ with the pistons and j-spec cam stock + intake.

 

[TheMAN]

you didn't read the faq did you?

e-spec and "aus-spec" ARE THE SAME

 

[twilightprotege]

just spoke to my local mazda dealer - the 9.7:1 pistons cost
standard size and 0.5mm oversize both $127.38aud each (around $89usd each)
0.25mm oversive (in the shop at the moment - the guys wants to get rid of them) $87.80aud each (around $61usd each)

i dont know how that compairs to US prices....

 

[akhilleus]

i did read the faq. There are different pistons and compressions for different engines which i guess are both offered in e-spec and aus-spec models. Stock pistons here cost about $75 each. I will contact u twilight if i am interested in those. Also find out shipping prices to the US. Hopefully corksport will invest in the parts and there will be cheaper prices. thx

 

[twilightprotege]

the guy i spoke to said the 0.25mm oversize are cheaper because he's had them sitting there for a while - they were ordered in for a job, but never used

shipping prices for sending them to be received in 2-4 weeks will be about $32usd, or 3-10 business days for $40usd

obviously these prices depend on the value of the US vs AU dollar

 

[akhilleus]

i will let u know...thanks alot for the info

 

[TheMAN]

you realize the 9.7:1 pistons are just 1.8l 9.1:1 pistons right?

 

[twilightprotege]

no worries. just pm me

 

[akhilleus]

i dont think they are cause twilight has a 2.0L

 

[twilightprotege]

are they really the same? i know they are the same bore, but what CR is the 1.8L???

 

[akhilleus]

well the 1.8L supposdly has a diffeent comp ratio. But i thought that your sp20 had 9.7:1 2.0L...so i would use standard size with no oversize

 

[twilightprotege]

yeah my 2.0L is 9.7:1 comp ratio....

 

[akhilleus]

yeah...thats what i thought. But there are also 1.8L pistons that are oversized to fit a 2.0L. supposdly they give a higher compression but since they just have fatter rings that isnt very good...real 2.0L 9.7 is better

 

[TheMAN]

"real 2.0 9.7 is better"?

you seem to be reading comprehension challenged... let me spell it out to you... THE PISTONS ARE THE SAME AS THE US SPEC 1.8!!

 

[twilightprotege]

i ask again, what comp ratio is the 1.8L?

 

[TheMAN]

 

[twilightprotege]

so you're saying 7mm of stroke difference only equates to 0.6 increase in compression ratio? that doesnt sound right