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^ yeah I remember when that kit came out I'm pretty sure they stoped making it because nobody bought one I think the regular price on it was $5000 which is pretty steep. I would love a set of those 11.1 pistons but I hate the fact that if you get the pistons you have to get the rods cause the stock rod won't fit.

 
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I thought that was the case with any after market piston? Granted you could probably run the gx pistons with the stock rods, but the rods are said to be a weak point- esp with higher compression and much higer rev limit.

 
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I think your right triz about using stock rods with any after market piston.

Yeah I have heard that the rods are the weak point of the engine but I think it maybe more to the point that the rod bolts are possibly the weak point cause look at andy he has done 374hp on stock rods and the only thing that I think has happened to him is he has spun a bearing. So if I was running those gx pistons I would run stock rod, I have faith in Honda,lol I also know that the D17 rods are beefier than the D16's.

 
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But you still have the benefit from having not only a stronger rod, but a lighter rod as well- which you really need when your doing NA- who knows how much power loss there due to excess weight on the rods. Im sure its not huge, but honestly with d17 na, I'll need everything I can get.

 
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Would have to agree with you on the weight saving characteristics of aftermarket rods. However, I do find the benefit questionable when taking price into consideration (I think they're at something like 700usd for Maxi-Lites). I'm thinking using the GX pistons on stock rods with upgraded rod bolts. I'll look up the bolt size one day and hopefully ARP makes something compatible.

 
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They do make upgraded rod bolts check out my arp rod bolt install
https://www.civicforums.com/forums/7...s-install.html

they are something like $38 for a whole set of rod bolts

 
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That's great! Simplifys things alot. Much cheaper than new rods too.

 
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when do you plan on putting gx pistons in your car? i found a site where they sell gx pistons for 173.48 for the set. thats the cheapest ive seen it... for the standard ones..

http://www.hondaautomotiveparts.com/...TON-CRANKSHAFT

 
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Within 6 to 10 months, I plan to have the GX pistons in my motor. Among other things of course.

I'll have to run the part number through with Honda and the automotive parts network in Montreal first. See if they can even get the parts as the GX was never sold here. Otherwise, I'll be buying online so thanks for the link.

So yeah, I'm not going turbo anymore.

 
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browsing around the internet i found this for pistons and rods.. cr 10.5..

http://www.importperformanceparts.ne...ek-ehonda.html

 
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lets back up a moment... I thought someone had posted that the gx pistons wouldnt work kuz the compression would be too high for pump gas? If thats true, which I could not verify kuz I didnt grab all the numbers together to run the calculation.... how do u guys plan on running gx pistons!?

 
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Ya triz, i would wait until you get the k-pro before you put the cam in. The other guys are right, the VAFC really does nothing. I have the stage two cam with pnp head and running the VAFC and it really runs like crap. It wont stay ideling. And really makes driving very complicated. Everyday is like an adventure when driving becasue I'm juggling between the brake and Accelerator. So i suggest getting the k-pro so you dont have to go through what i did

 
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got my FIC today...

 
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Months late... but again, here's where I got my information. However credible or uncredible it may be.

Compression calculator yielded 11.92:1
http://www.zealautowerks.com/dseries.html

GX piston specs
http://heeltoeauto.com/httech/YaBB.p...1160787887/0#0

 
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Thanks ^^

But... are they going to fit, or are we going to have valves crashing into the piston?

 
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Bump this thread!

 
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Based on the pictures of the pistons, it doesn't look like there is too much difference. GX has the recesses for the valves too. Only way to find out is to try.

 
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they should fit and you should not have a problem with the pistons crashing into the valves but the only way you can test it is to stick it in an engine and crank it over by hand

 
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From what I read on that site, and assuming "compression height" is the same as "deck height" they're the same size, height-wise. 27mm, 01-03DX/EX vs. 01-03 GX

 
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sooooo.... my question to anyone who knows about this.....

say u had a civic that made sayy 180 hp NA, and another same model same engine that made 180 hp turbo....

how would they two cars behave differently?

 
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180 hp would be instant on the NA, where as it would only kick in at a certain rpm, or WOT on the turbo and then take a while to spool up on boost applications.

 
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Not to debate, but the "while" it takes to spool up isn't as long as you think. With most NA Hondas making most of their power in the higher RPM range (the same range where a turbo breathes really deep), I'd still take properly implemented and tuned boost over NA any day. Been in a the new BMW 335i? Twin-turbo'd bliss.

 
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look at the new civic si. most of the power isnt even there until you reach 6k rpms.

 
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I think it all depends on where and when you need the power. I'd love to have a turbo for the drag strip and some highway fun and a built n/a for a road course. I wouldn't want to have 180whp on the front wheels coming out of a corner in a civic. Now in a straight line hells ya.

 
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If thats the case.... then why would I bother with gx pistons if they are the same compression. Calculations say they will be 11.9 compression. Thats more then stock. I think somethings wrong with your statement, but I dont know what ...??

 
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^ i've seen the actual gx piston before they are domed a lot higher than the stock piston. Also I think that, compression calculator is off a little bit cause I put in some spec's off another older d16 motor and I got a lower compression than what the motor actually had.

 
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Off by how much?

 
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All I was doing was reiterating numbers from that website, there was no analysis involved haha

 
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Piston Compression height is measured from the pin center line to the flat portion of the piston. This does not include the dish or the dome.

The dish or the dome changes the compression based on the volume of dish or dome. Compression height in the regular D17 motors is 27mm, same as the GX. The GX pistons get their compression increase with dome.

 
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so.... would these guys hit the valves? The dome doesnt seem like its anything to speak of.

And any issue with pump gas.. I'm not thinking there would be.