Trd 13.1 Pistons

[kortik]

I am considering purchasing TRD pistons for my 2zz
everything is stock except PPE header
does anyone running them?
I am plaining to use 92 gas here in Seattle I think it should be fine.
will try stock ecu then Hydra

[Tem]

<div class='quotetop'>QUOTE (kortik @ Jan 11 2008, 11:43 AM) <{POST_SNAPBACK}></div>

does anyone running them?[/b]

Yes, check www.newcelica.org

[kortik]

who is that there?

[Tem]

<div class='quotetop'>QUOTE (kortik @ Jan 11 2008, 01:06 PM) <{POST_SNAPBACK}></div>

who is that there?[/b]

I don't remember his nick (or if there were more), but I'm sure you can find it through search.

[greenstreak]

Tuning may prove to be tricky on a 13:1 piston and 92 octane.

[07HR350Z]

13 to 1 pistons will ping/detonate for sure on 92 octane. It's not even in the tune at that point it's in the gasoline you are using. Even if you take away a lot of timing i'm sure it'll still ping a little. I've seen a built K20 race engine that ran 14 to 1 compression ratio but it ran on alky. Good luck!

[kortik]

on TRD website they dont say you'll need 100 octane gas,
I dont see a problem there.

http://trdparts.jp/english/parts_engine-2zz-ge.html

[Littleguy]

I'd do a PFC or cams first. Just doing pistons without building anything else to support it won't work out very well for you.

[SgtSpyder]

Little squirt of water/weth might help the keep the detonation in check. In the long run it would be cheaper then race gas.

[07HR350Z]

Here's a good link, they also go along with what I said. The ecu will pull a lot of timing because it will detect ping.


http://hondaswap.com/engine-building/compr...ne-boost-28701/

[greenstreak]

<div class='quotetop'>QUOTE (kortik @ Jan 11 2008, 03:02 PM) <{POST_SNAPBACK}></div>

on TRD website they dont say you'll need 100 octane gas,
I dont see a problem there.

http://trdparts.jp/english/parts_engine-2zz-ge.html[/b]

They are not going to spell everything out for you. Just because they don't tell you what gas to run doesn't mean they are made to be used on 92 octane.

I am only running 12:1 pistons and my car won't see anything less then 94 for safety.

[dustylax]

i wouldnt go higher than 12.0 or 12.5 at most on pump gas, your seriously asking for a disaster if you go 13.0 on 92 and daily drive the car.

We are building a honda at our shop right now and we are doing the motor at 12.5, the customer is a 19yr. old who has never touched a car before and was asking for even higher compression like 13 or 14:1...we wouldnt recommend it or even do it for him if he didnt listen to us and let us build the motor w/12.5:1 since we know its going to be his daily driver and run it on pump gas.

[dustylax]

<div class='quotetop'>QUOTE (SgtSpyder @ Jan 11 2008, 10:24 AM) <{POST_SNAPBACK}></div>

Little squirt of water/weth might help the keep the detonation in check. In the long run it would be cheaper then race gas.[/b]

thats granted you daily drive the car and you fill up your meth regularly and dont forget even one time to fill it...or if something fails in the meth injection setup your motor just went boom boom...its not easy to run a high compression motor on a daily driver no matter what the motor is, you either run race gas everyday or you are always cautious. Thats my approach, safe means spending more money in this case higher octane gas, or go the other way and make a little less power w/lower compression like 12.0:1.


i think japan uses like 100 octane as a standard so if those pistons are trd they are probably safe for pump gas over there...not so much here unless you have a BP w/100 like i do around here.

I can get you custom 12.0-12.5:1 Wiseco's for $500 shipped if you'd like (it takes 3-4 weeks for wiseco to produce a custom piston like that).

Dont forget you need to use sleeves for aftermarket pistons on a 2zz. I dont know what those TRD pistons are made of and if you can drop them into stock sleeves or not but im sure its going to be tough to find someone to talk to from toyota that would gaurantee any of that for you if they went wrong.

[GTsRasta]

Send a PM to the puerto rico 2zz tuners from newcelica.org , they have experience with them (redliner9k and fraugts), and I guess were the ones you read up and heard them post "it's fine to run on pump gas, we did it...". But if dusty says it's too high, I wouldn't touch it either, especially with only 92 octane. Plus they're crazy down in Puerto Rico...

[kortik]

yes I talked to redliner and he said they did it and it was fine, he told me that I should do it w/out a problem
I was in Japan 2 weeks ago and asked Brashboy.net mechanic cause I went a visited thier shop
they told me I'll be fine, but I forgot to ask him what octane gas they have in Tokyo.

They only have 2 grades of gas there at ther gas stations

regular and hi-octane thats it, well also diesel.
but it didnt say on the pump what octane level they have.

Also redliner told me that they were using 93 ocatne w/TRD pistons in Pureto Rico.
how could they run them w/stock ecu and have no detonation, knock etc...
I dont believe they're lying?

I am not sayng that you guys are all wrong I just want to hear what people have to say about it.

here is the info from trdjapan about thier TRD pistions:

●Changed to aluminum forged pistons, which are stronger than standard aluminum cast pistons.
●The skirts of the compression pistons are treated with molybdenum, as opposed to the steel plating on the surfaces of standard pistons.
●Doing this ensures excellent slideability and lubrication in matching with the aluminum cylinder, which improves the initial break-in period. ●Lightening of all areas including the piston pin has resulted in achieving a single piston weight of about 70 grams, improving the cam-follow in the high-rev region.
●By changing the shape of the piston head, the high compression ratio (11.5) of the 2ZZ-GE engine has been improved even further to 13.0. This high compression ratio improves torque and response throughout the entire range.

This is what I am going to do. I am going to ask my wife to call TRD since she is Japanese and ask them about what gas octane # in Japan they recomend

[Tem]

<div class='quotetop'>QUOTE (dustylax @ Jan 12 2008, 02:54 AM) <{POST_SNAPBACK}></div>

i think japan uses like 100 octane as a standard[/b]

This info might be a bit outdated, but a few years ago they had octanes from 91 to 100 available. However they use different octane scale in Japan and you should deduct about 5 from japanese numbers to get roughly US octanes. So their 100 octane would be roughly 95 in US and it's not their standard fuel, though it's commonly available.

[grumpy]

<div class='quotetop'>QUOTE (Tem @ Jan 12 2008, 09:42 AM) <{POST_SNAPBACK}></div>

<div class='quotetop'>QUOTE (dustylax @ Jan 12 2008, 02:54 AM) <{POST_SNAPBACK}>

i think japan uses like 100 octane as a standard[/b]

This info might be a bit outdated, but a few years ago they had octanes from 91 to 100 available. However they use different octane scale in Japan and you should deduct about 5 from japanese numbers to get roughly US octanes. So their 100 octane would be roughly 95 in US and it's not their standard fuel, though it's commonly available.
[/b][/quote]

I was going to say there is a difference in the way octane is labeled in Japan and the USA. There have been a number of posts that tell the difference plus you could google an answer, but Tem told the shortcut I use also.

[sxlostv1]

<div class='quotetop'>QUOTE (kortik @ Jan 11 2008, 09:02 AM) <{POST_SNAPBACK}></div>

on TRD website they dont say you'll need 100 octane gas,
I dont see a problem there.

http://trdparts.jp/english/parts_engine-2zz-ge.html[/b]

it doesn't say anything about 100 octane because they assume youre IN JAPAN. and there, 91 octane is water.

[dustylax]

thats good info thanks.

The TRD info you listed above says "aluminum cylinder" but they are MMC which might be the same thing but they didnt list them that way, im not sure what they are mixing w/the aluminum in the MMC but i would also ask if these work w/those sleeves, i would assume yes but its always safer to double check and be sure.

[GTsRasta]

Well at least you got the Hydra to tune with should you get it. How's that going BTW? I'm looking forward to seeing you put down good numbers with the Hydra and the new PPE race header you got.