Celica Forums General Discussion Engine and Performance JET Performance ECU Chip

i wish my celica did 0-60 in 5 seconds

I wish mine did 0-60 in 4.5 seconds instead of 4.7

You need TPR

you got yourself a nice expensive 360 dollar sticker.

I feel bad for you once you dyno 160-170whp.

ah poop on you

When you say 180 hp and 7.3 0-60, did you get that on the g-tech or did you just take that from somewhere. Because obviously like lucky said, you have to enter your cars weight and it is only accurate if you put in the correct weight etc and that wouldnt be comparing anything if you didnt use the g-tech before the chip. I mean obviously you did not gain that much horsepower. What would be helpful is knowing if it does work without getting overrode though.

haha i poop on mike too...lol...i wish my auto gt was that fast.

gtech is very accurate

Yes it is. However, it is only as accurate as the numbers you put into it. If you went to a weigh station and got your actual weight with you in the car then its one thing. But just punching some number in doesnt work too great.

accurate and precise aren't the same thing.

so are we still waiting for the dynos

Whats your point? Precise just means reproducible. If its accurate everytime (close to the actual value) then its going to be precise.

that is my point. you assume it is close to the actual value of say a dynojet. show me the proof.

Incase you're spacing out those are the stock specs on a GTS and when i ran it before i got any upgrades with the g-tech guess what it said... 180hp 7.3 0-60.

bhp, whp?...don't need to say any more.

i wud say the 180 is from crank..

does a certain person see the issue then?

180hp = stock crank

How is the ecu going to override a new ROM that's been soldered onto the ECU in place of the factory one? Ever think of that? Yea, it'll override some piggybacks, but if you desolder the rom with the fuel maps and such, and replace it with a new one, there is no way in hell it's going to be overrided at all, you are essentially reprogramming the ecu altogether, you're not altering sensor signal voltage, you are changing the way the ecu itself operates.

If it was going to override, it would've done it already, but since many of you just post the typical response, without actually reading his posts (which state what he did) you would get this fact.

Problem is, chips have gotten a bad rep in the celica forums because of ebay jerkoffs selling resistors and selling them as "chips". This is not a true chip. A real chip refers to a new ROM with a new program, which replaces the factory ROM chip. ROM stands for "Read-Only Memory" which means it can NOT be overwritten by traditional means. You must use FlashROM for that, and only a specific piece of hardware called a "ROM burner" can clear and rewrite it. Most import ECU's do not incorporate the needed hardware to do this, so you need to physically remove the ROM, and either re-flash it on external hardware, or replace it with a new ROM with a different program.

So, you need to send the ECU in eh? that's handy to know, this means that there is no external port on the ECU to install an external ROM. The reason you need to send it in for the upgrade is simple, they need to de-solder the actual ROMs and replace them with a new one. Some roms can just be swapped out, since they use a socket, other ECU's (like the ones on most domestics) have an external port, you simply plug the new ROM into the ECU externally. Nowadays, most ECU's can can be "Re-flashed" through the ODBII port (Look at things for domestics like the Hypertech power programmer), overwriting the factory program on the ROM with a new one. However, since toyota isn't being forthcoming with ECU specs, the only method that would work would be to replace the ROM by desoldering, and putting a new one on the board/soldering it down.

This is clearly what has been done in this case.

The V-Force has gotten mixed reviews for the celica, most of them negative, but then again, I suspect it would work properly if you swap the ROM out for JET's beforehand. I suspect you should get decent results.

Only drawback is this: if you upgrade, say, add forced induction of some sort, you will need to change the ROM again, which means sending the ECU out again, to be desoldered, reprogrammed, and then re-soldered, unless of course JET had the foresight to solder a socket in place of the factory ROM, making future program changes easier.

PowerFC is a good option for those who would change their tuning frequently, it has flashROM, and includes the needed hardware to re-program the roms with an extenal device. While the JET upgrade may actually be effective, major upgrades will require you to send out the ECU, which means more downtime.

However, I would suggest to Ryo that he get an actual dyno run on the car, just to confirm the results.

Sounds interesting, keep us posted

Are you talking to me? I don't own a g-tech so I probably shouldnt talk about how accurate (or reproducible lol) it is. I am just going by what everyone has said. If you are talking to me, I think we have been agreeing about it anyways as to how what you input into it has to be accurate and you cant be on a slope etc.

What it comes down to is if you will believe that this chip that is only 360 dollars will peform just as good or perform better than the powerfc which is 1000 dollars. I will believe this when I see it. The powerfc is a standalone unit that is tuned for your car. The JET is just put onto the stock ecu. But yeah, get that dyno and if I am wrong I will gladly admit it.

I own a Vector performance meter, they're very accurate if set up correctly.

Of course, if you don't input a proper HP correction factor, it will usually give you the wheel HP, the base configuration on most performance meters usually doesn't account for parasitic loss from the drivetrain, aerodynanic drag, etc.

I have my meter calibrated to give me crank HP numbers personally, there's about a 15% drivetrain loss on an auto GTS, and about 8-10% loss on a manual tranny.

you definitely want to make runs on as level a surface as possible, but of course, most dynos don't include factors like rolling resistance, wind resistance, etc. So in some cases, a performance meter is more accurate, rather than less.

Some dynos are more accurate than others. You can always make a dyno run, and use the results to dial in a performance meter, which will help make readings more accurate.

Of course, the best thing to do is to make multiple runs, and average the difference. this is the best bet with either a dyno or performance meter.

How about we just get a dyno.. and settle this

the website looks legit, it may be true, if you think of how many chips they sell at 400 bucks each it must do something

no, so don't worry about it man. apparently he hasn't figured it out yet lol.

im really interested in just feeling a difference in power, but numbers would be sweet, the website shows numbers on a camry, but not sure if the ecu is similar, i know dude that had one on a 4.3 s10 and the difference was unreal

ok assuming 8-10% loss on manual tranny and he says he can at least get 225 hp at the crank with his original listing of upgrades...that means about 202.5 whp at worst.

Who wants to put $360 down that he doesn't hit 202.5 whp on a dynojet?

If he's right, he gets his JET paid for.
If he's wrong, JET means "Just Empty Talk" (from the company of course).

Any volunteers?

let's wait for a couple of weeks and see if the butt dyno picks up that extra 50 crank hp...

10 and ill buy one,

I want something like the PFC for an 03

No, actually what it comes down to is the quality of the tuning. The factory ecu is more than capable of doing almost anything the PFC can do, after all, it handles all the same functions on our perticular application from the factory.

The difference, other than price, is the fact that with JET and other major chip manufacturers, you need to fill out a worksheet telling them the engine specs, and they tune their ROM for the modifications you put down on the form, They'll ask abourt the cam profiles, compression, turbo/SC/nitrous settings, etc, and they tune based off of what you tell them, unless of course you take your car to their headquarters, in which case they'll tune the ROMs with the vehicle on hand. If you are off on the specs you submit to them, the tuning will not be optimal.

Don't sell JET short; they've been making and distributing their ecu upgrades for ages, way longer than the PFC has been around. Their street chips usually use a base map, like the pfc, but they change those maps based on the mods you have. They also don't limit to one base map, since, along with the engine specs, they go off the ECU model number. Because hardware revisions of the ecu usually differ, the GTS may have as many as 20 or more different ROM sets between all the model years. Also, if they don't have a map for your ECU on-hand, Jet, as well as many other similar companies, will make one for you for free, just so they can add that specific hardware revision to their available application list.

I'm definitely not knocking the PFC, it's a nice tool, the tuning is very flexible, and it has options for expansion beyond the factory ecu for additional sensors, injectors, etc. I am not disputing this fact, but some people do not need all the extra bells and whistles, and as far as I know, most people don't have a Dynometer in their garage, so the fact that it can be tuned by the end-user is lost on most people.

However, for most tuners, they can get identical results from a ROM upgrade if it's executed properly, and it may even be more reliable.

The one thing the Jet upgrade has over the PFC is that it's 100% ODBII compliant to the factory specifications, and is street legal in all 50 states.

Hoooo shit i'm pretty sure you just got served!

LOL. Actually NOT "quality of tuning". More like tuning in general. I don't call punching in numbers according to specs and descriptions tuning. You did say most people who get aftermarket ecu's won't get around to tuning, so even if they did bring their JET into headquarters to get tuned, I don't think these guys will spend hours on the dyno like Lucky and others have spent to get the numbers you claim you can get with JET.

something tells me JET doesn't tune the vvti with their number punching, and that according to Lucky is where he got the most gains with the PFC.

big deal on OBD-II. it's a 2 min swap between PFC and stock ecu. then wait a week or two and then go pass your smog test.

GReddy E-manage or Spilt Second is proven and clearly superior to JET, considering the method of operation/flexibility and also the similar price range.

Sure try it to be different. I wish I had money to burn just for the cause of being "different".

No SLVCELI did not get served. Quite the opposite in fact. You served yourself. What's the saying? oh yes: "Birds of feather flock together."

Nah, not serving anyone, just speaking on past experience with chip producers. The three big companies that do ROM upgrades are Superchips, Jet and Hypermotive. There are a couple other smaller comanies out there however, like Diablosport, that also make some decent ROM upgrades.

Far as I know, JET is the only company that can upgrade our factory ECUs. Superchips mostly does domestics, and Hypermotive has moved on to making Power Programmers (a tool that let's you program the factory ECU, similar to a datalogit, too bad they can't make one for our cars).

Diablosport may be able to upgrade our ECU's as well, but as far as I know, they haven't done anything with the ZZ family yet.

not really QT, there was no servage to myself, He indeed gave a good rebuttal to slvcelis remark, which was not entirely thought out first. So really...he still served him..and this thread should end anyways...

oh well opinion's an opinion.

won't end until we get the dynos.

and dynos still dont prove anything so this wont really end

who told you that? sure they do. it's called baseline run(s) compared to modification run(s). on the SAME dyno with SAE corrections OR same time of day and similar temps/humidity if you still don't like correction factors. Before and After. That's how it is.

its called photoshop!, ive seen so many fake dynos lately ive come to thinking if you dont see it in person dont bother with it

yes yes credibility is always an issue...

ok, so maybe a video of the dyno computer screen might be better for those not in New Haven, CT. I'm thinking if he doesn't get the results, he won't bother to post. So that's another way it can end...dropping off into backpages...

yes, hopefully..whatever im done. I bow down before the almighty QTR...plz let this thread die

lol I've got another subject...

PFC is viable, Jet is viable, there are MANY options that work, I just wish one in perticular <cough PFC cough!> didn't always consume the threads.

I like to know all the options, since PFC isn't really an option for me, it just seems to be that when anybody brings up an ECU upgrade other than the PFC, it just turns into a bash-fest, and nobody gets any facts on the matter.

Ryo, I appreciate you trying something new and sharing it with us.
actual dynos would be nice, but I'm not forcing you to spend money on dyno time.
I still want to hear results when you add the v-force into the equation.

Let's just play nice, this is a thread about the JET products after all, not the PFC. arguing here is counter productive.

You say that my remark was not thought out but did you even think before you posted this? Rave's comment was not trying to "serve" anyone. The whole point of me saying that the chip is not comparable to a standalone is because this chip is not tuned for your car. Period. Filling out a worksheet telling them the engine specs doesnt cut it. And since a lot of the things I think are common sense dont appear that way to some people; Say, for example, one person has the kazuma exhaust with the aem intake, and another person has the trd exhaust with tpr intake. Does JET have the tuning capability to set up the tuning for your car when there are thousands of performance part combinations available? Think about how different those mods will be at different rpms. This doesnt even take it account how all our cars will perform different or the countless hours that can be spent specifically tuning a GTS with the powerfc (with far more options than the JET chip) to yield less horsepower than what is claimed here.

actually there are a few "ecu" upgrades

if you truely believe in jet I suggest you purchase a safc to compliment it.

You should have said that in the first place lol. If you wanted to hear that this chip was so great you should have just told me to tell you that j/p. The whole argument here was about the unrealistic horsepower increase. The reason the powerfc came into the argument was because he was saying the horsepower increase was more than what countless hours of tuning with the powerfc could net. I am hoping that this really does work as good as he says, especially for the dbw people. I am just confident that you will see that your argument was somewhat biased since you want this to work so badly. I have e-Manage and actually want this to work as well but I dont have a side on the matter. You know what I mean?

Bash-fest NO. Truth-fest. Deal with it.

Yes this is about JET products, and comparing it to the standard and the gains achieved with that is still discussing JET products...it's called compare and contrast.

Futhermore, examining the operation of how JET goes about their so- called "tuning" is also discussing JET products.

People mentioning the past results of others on other Celica or car sites is also discussing JET products.

None of that is counter-productive but rather informative. FYI though there may have been a JET thread, I have not seen another JET Ecu thread on here since I joined this site mid last year. And I am an active poster on this site.

That's right no one is forcing him if you imply some are. He's made some claims and he is the one who said he would dyno and prove it to us.


Let's see if he keeps his word about posting and is honest about it. Yes, unless we see the dyno in person, only God will know. Those are the facts you say that are missing from this discussion.

OK to be fair to the Maker, anything is possible. So perhaps if he prays really hard, the JET will be given powers GREATER than the PFC.

Just a crazy guess, but something tells me God isn't going to put a whole lot of meaning in this 'chip'