Celica Forums General Discussion Exterior TRD high compression pistons

Has anyone done these? http://www.celicasg.com/technicals/2zzge/
How much do they cost?

I have dreamed of doing that to my Celica! Others wish for a better turbo settup, but I would love to do that. The gains seem mild at best according to the link. I still would do it with a knowledgeable mechanic friend (cheap install).

tha looks cool...i want one now...

US$1700 for a complete set. Comes with pistons and rings. Very high quality product.

Does your area sells 98 octane fuel? It needs at least 98 to run.

If you want I can get it shipped to your door step with US$1600.

email me matthewloh@celicasg.com

I will give you more detail about the setup.

Keep talking, you have my attention.

yea i would like one too but thats a lot cash

as the instruction from TRD stated, it still can be ran on stock ECU. No one in my country thinks that's possible with 98 octane petrol. Until one of my friend did it. He is very happy with the result. Boy i tell you ... his car pulls man!!!

If fact, 13.0:1 compression ratio is for race car use, and its a matter of tunning the car if you want more power.

When the car hits lift ... its your balls against the machine.

so it won't run off typical premium 93 octane?

20 hp jus from pistons and rings??? thats pretty good for bout 1700 you said???

does anyone kno a site that has these for sale???

I have 1 set for sale 700.00 dollars, brand new, pistons and rings

where'd you get em??? i would prefer a site...

my friend works for toyota

that is more than half the price from Japan and what celicasg.com offers! Damn! Are you sure about that?

cant find it for sale on that site...do you kno anywhere that sells these (i prefer website)???

Will it or will it not run off 93 octane??

Doubt it, not very well anyways, with a 13:1 compression, you will get detonation on 93 octane, unless the ECU is retuned and the fuel is enriched somehow. without such tuning, you would need to run 98 or 100 octane racing fuel to keep the knock away. with race gas around here selling for like, $5 and up for a gallon, I'd rather get it properly tuned after installation and save on fuel costs.

I'm suprised toyota makes this piston set, but doesn't offer a new ECU to use it on pump gas, but in Japan, 98 octane is considered premium fuel, so they don't need the ECU.

However, companies like Brash Boy already have ECU's pre-tuned for running 13:1 compression pistons, and have US domestic vershions available, but I'm sure they aren't cheap.

Im sure the a/f ratio would have to come down to 12.5:1 at least if you were to run 93 octane. Say bye bye to gas mileage as you know it.

The reason for using the stock ECU is because of the programming in the stock chip. Its able to retune by itself and self learn.

But ECU like the power FC is not that clever, it requires a good tunner to imput a good map.

how much does 1 yen equal in USD ???
also do you hav a site to those pre-tuned ECU's???

anyobody???

So how much power do you get out of it?

bout 20 horses

There are about 600-700 yen to 1 USD. Don't quote me though. Go to a currency exchange website to find out the exact amount

i would be all over it for 20 horses . . . they should make em for a GT.

So would everybody else. The problem is that you have to use expensive high octane fuel.

God i can't but wonder what my exhaust would sound like with a 12:1 compression!

try unavailble high octane fuel

i can buy 110 octane here at a BP station near the track. its like 4 somthing a gallon though.

wow all i can get is 93 octane

Call your local motorcycle shops to see if they have high octane. They should have it! also try 76 gas stations! You gotta ask for it though because I believe they sell them in 5 gallon drums.

So you say 98oc. gas is needed for max. effect?

If it's so... that wouldn't be a problem here in Slovenia

oh man, having that on the car would be so awesome.

Well, that's still not the only solution, you could buy a power FC and tune it for such high compression. make the fuel mixture a bit more rich and you shouldn't detonate. Brash boy also makes some nice ECU upgrades.

You could get an adjustable Fuel Pressure Regulator, and try to enrich the fuel that way, but our fuel systems don't easily accomidate that option. you could go with bigger injectors too, but injector flow rate would have to be properly matched to your setup, plus, you'll probably need a better fuel pump.

True, the factory ECU is of the learning type, but you must realize that if you run those pistons, you'll still have problems, as the factory pistons are 11.5:1 compression, you suddenly change them out for 13:1 pistons, and you're still gonna get knock. There's only so much the ECU can do on it's own, and it won't be able to compensate for the extra squish in the cylinders, when the A/F mixture gets compressed that much, it'll detonate from compression alone, and the ECU can't fix that (since it's a physical change in the piston that causes it). while it may work without modification on 93 octane, you will probably get some knock and a CEL. too bad resistor mods and SAFC modules don't work, this would be an easy solution to the problem.

98+ octane fuel is far more stable, so the fuel won't pre-detonate. this is why your fuel choice is critical with the factory ECU. you could run something like NX Power Booster in a tank of 93 octane to get the same result, but in the end, it'll be just as expensive to fill up your celica.

Your fuel economy shouldn't suffer much, if anything, it'll improve a bit with a higher compression (it's more efficient, and the fuel will burn more completely) where it hurts you is in the pocket, as it will cost more to fill the tank than it did before the swap. fuel consumption rate should stay the same, unless of course, you are using fuel enrichment of some sort, in which case, you will be using more fuel in each combustion cycle to keep the mixture rich.

It basically comes down to two choices, pay more at the pump, or enrich the fuel mixture and increase fuel consumption, either way, it'll cost you more for fuel.

I suppose that's why the pistons are specified "For Racing Purposes only".

It may sound silly, but someone should write Super Steet magazaine, and ask them a tech question regarding these. Say you want to run 13:1 TRD pistons in your 2ZZGE celica, but don't want to pay out the nose for racing fuel. Tell them the problems with S-AFC and similar units on our cars, and request a solution to the fuel enrichment issue. They actually have some good responses for their Tech Q&A submissions, and I'm sure they could come up with an idea or two.

Also, you could ask the guys at Monkeywrench Racing, they may have some ideas (one being the Power FC)

BTW guys, you probably won't get 20 HP from these pistons alone...

According to the site, the 2ZZ's in japan that showed those gains got the full treatment, including TRD Flywheel, Header, Exhaust, air filter and the cylinder head was also ported. All these mods were done in-house at TRD direct shop in Hachiozi city, Tokyo.

The pistons alone, so long as you have a good intake and exhaust system, should be good for about 10 HP, more if the engine is tuned for them properly.

according to TRD Japans webpage the kit is more then just the pistons, the kit also includes the TRD Header, TRD Muffler, TRD Airfilter, and the TRD FLywheel. not to mention it says something about the valves (not real sure, my English to Japanese isnt that good) and its something like 210PS give or take which comes out to be just shy of 200HP. The whole kit is 550,000yen

why not just get a Power FC and tune it? That should solve the problem...

Hmm, these pistons sound tempting. Especially if you can run the Stock ECU.

In Australia, we have 91 Octane regular unleaded, 95 Octane Premium (which you have to run in the celica) and a couple of service stations (Shell, Mobil, BP) have 98 Octane Premium for the same price as normal Premium. So no worries with detonation.

The Aussie spec Celicas also put out about 10Hp more than the US Spec ones (190HP specced by Toyota). Probably only because we have a bit better fuel. There are no intrusive Smog laws and we don't have to have EGR either.

the guy i talked to said that it might be better to get a J-Spec ECU and run 96 plus octane

you guys just have a different set of fuel maps than the US spec celi's ... go for the pistons

This is a translation from the TRD Japan site on the TRD 2ZZ-GE Engine and what upgrades you can get. It lists the pistons, rings, flywheel and Header. I've put the pics up as well.
The table didn't come out too good (looks fine on IE, but not inserted into the forum)

Complete price	The installing part job and the like which is included in complete price	TRD part specification	Usually including tax unit cost (circle)	Necessary quantity	Equivalent of 1 usually price including tax (circle)
The right description contents set XXYEN 577,500 (including tax) (Tax removal \550,000)	High compression piston	Compression ratio approximately 13.0 (genuine 11.5) forged part approximately 70g light weight conversions	42,000	4	168,000
	Piston ring set	Friction decrease	5,250	4	21,000
	Exhaust manifold	4-2-1 type pipe long optimization	105,000	1	105,000
	Lightweight flywheel	Mass 27% light weight conversion moment of inertia 22% decrease	60,900	1	60,900
	Sport air filter -	Inhalation resistance decrease	9,450	1	9,450
	Usually price (1 unit) total of the installing TRD part				364,350
	Engine ASSY removal and re-installation				-
	IN&EX port processing				-
	TRD piston & piston ring installation				-
	Exhaust manifold installing				-
	Lightweight flywheel installing				-
	Sport air filter - installing				-
	In addition necessary genuine part and oils and fats etc.				-

* Other than describing there are times when cost is required with the condition of the engine.
*[u]Genuine E.C.U. [/u]Because[u]of correspondence[/u], E.C.U. There is no setting.
* Other than the above-mentioned finished product installing,[u]high response muffler Ver.S for the below-mentioned 2ZZ-GE on-board car simultaneous installing time, the highest output approximately 15kW (20ps) and largest torque 20Nm (2kgfm) improvement[/u].
(Measurement value is TRD bench test value. There is a difference in improvement generation depending upon the vehicle.)
* As for details of the above-mentioned each part the sport air filter please refer to each page.

* High response muffler Ver.S for 2ZZ-GE on-board car
* As for details, please refer to the page of high response muffler Ver. S