Compression-raising pistons CG13DE?

[Chrismo]

This is what's on my mind for some time.......as I have ordered some oem CG10DE pistons, but Nissan Holland told me it would take at least 2-3 months to get them, I'd like to know if there are any other ways (pistons) to raise the compression to about 10,5:1

Does anybody know a shop/place te get some info about this "problem" ?

CG13 engines are not HOT in the tuningscene, and I find it realy hard to find anything like this.



gr Chrismo,

ps: does anybody know why the topic about my car is closed? I'd like to post some pictures...

 

[frank]

pm sent

 

[joesouthgate]

Thats cause your thread was in the introduction forum mate, you will need to make a new one in K11 Blogs.

 

[frank]

chris, these are the aforementioned pistons (courtesy of japseye, a "grade A" member on here )
they are coilpack ones (with the oval skirt/slipper piston type design)
on the left of pic
http://www.micra.org.uk/attachment.php?attachmentid=12423&stc=1&d=1238328365

 

[kennierobo]

Learn somthing new everyday different pistons! so what exactly will they do frank

 

[frank]

Learn somthing new everyday different pistons! so what exactly will they do frank

just a bit less friction i think ken (a little bit F1-esque in design)

 

[kennierobo]

cool like i said i learn something new everyday lol

 

[Chrismo]

thats cause your thread was in the introduction forum mate, you will need to make a new one in k11 blogs.

will do

Like I told Frank, I have found a engeneering company close to my home (20km), they already fixed the head (valves, and skimming).

As I had contacted Matthew H about this piston-thing, he could offer me custom made pistons with the cr I want.

I contacted my engenering company if they would mount the pistons on the rods, and also bore the cilinders suitable for these pistons.
Sure they would do this, but one little thing......as I get my own pistons (by Matthew H, or somewhere else) they are not 100% happy with this. I understand this!
I talked a bit more, and it seems they can also offer me some custom made pistons. If they do all the work, and deliver the pistons and rings, I get some warrenty on the engine! That's worth something.

Now it's waiting for the final e-mail, where they will offer me the price for the whole package.

I know this is more expensive than only put 1.0 pistons in my engine, but it will be better, I'm comvinced!





gr Chrismo

 

[young nav]

just deck the block or head about 50 or 60 thou to get that cr

 

[frank]

just deck the block or head about 50 or 60 thou to get that cr

that makes the lower chain pretty slack

 

[young nav]

nah its fine done it to my rally car and revs to 8k all day just as a temporary engine until i get my new motor hehe

 

[frank]

just for the record... the coilpack CG10 rings are slightly different to pre-coilpack CG10,s too
and the piston top ring land is narrower (more suited to N/A than forced induction methinks)
edit, they are a fair bit lighter too
http://www.micra.org.uk/attachment.php?attachmentid=12427&stc=1&d=1238447225
http://www.micra.org.uk/attachment.php?attachmentid=12428&stc=1&d=1238447225

 

[Chrismo]

The right ones are the ones you are selling I assume. How do I get the right springs/rings for these pistons?? You talk about selling without, so I need new ones.

Best is if you sell me the complete package (piston and rings)


gr Chrismo

 

[frank]

The right ones are the ones you are selling I assume. How do I get the right springs/rings for these pistons?? You talk about selling without, so I need new ones.

Best is if you sell me the complete package (piston and rings)


gr Chrismo

it,s up to you chris (i can take the 1.3 conrods off again, :doh, but you,re best to fit new rings (nissan ?) whichever ones you use
http://www.micra.org.uk/attachment.php?attachmentid=12435&stc=1&d=1238511057

 

[kennierobo]

I might have another set of those pistons shortley frank, I will have to wait and see if they want the changover from coilpack to none coilpack

 

[frank]

I might have another set of those pistons shortley frank, I will have to wait and see if they want the changover from coilpack to none coilpack

cheers ken

 

[Chrismo]

I do want to fit new rings! The thing is I already have a set of NEW pistonrings at home.....this because of a mistake in ordering something else ;-) These rings are suitable for CG13 and CG10 pistons... You tell me if I take the coilpack 1.0 pistons I need other rings. Where do I get these rings? And what will be my advantage by mounting coilpack pistons instead of the orher ones?

A lot of questions, but this mainly because I didn't see other pistonrings than the ones I have at home....so if the coilpack 1.0 pistons need different rings, where do I get them from??




gr Chrismo

 

[frank]

chris, i guess that your rings will fit the earlier type pistons, and main dealer only probably for the later ones ?
and the later ones are probably just an "improved design" , progress and all that
(high perfomance 2 strokes have a very high top ring eh)