7MGTE Computer upgrade

Hi there. I have a '92 7mgte that I am interested in upgrading the computer on. The only one I know of that does the upgrade is Jet performance products. Is this upgrade worth the money?? Does it give a noticable power increase? Does it effect the shift points in the Automatic tranny at all? What can I expect to get for all the money they want? Is there other or better manufacturers to choose from??

Why would you have them upgrade the stock ECU for close to $1K when you could add on a piggy-back fuel controller that would allow you almost infinite tuning possabilities for any future mods? Look into the Apex-i SAFC or other similar fuel controllers. Also what mods do you have to back this up that require more fuel/spark tuning?

The only upgrades I have done is to the turbo. The PSI is maxing out the computer. The CPU seems to shut down once the boost gets to a certain point. I was under the impression that the CPU upgrade from Jet performance products would allow for higher pressure from the turbo.. I also dont like how the tranny shifts at suck low RPM. I want this thing to get much closer to red-line before the shift. I thought maybe the aforementioned CPU upgrade would give me what im looking for. Am I wrong?? Is there a better way of going about getting what I want??

That's called fuel cut, turn the boost back down a few PSI, quit blowing a bunch of hot air, and it will make it to redline with full boost. Fuel cut is their for your engine's safety, to prevent evactly what your trying to do. Your engine doesn't have the fuel to go past a certain point and you found it, if you do go past that point the engine would run very lean. There are a few ways around this and I'll mention the best one, get a Lexus AFM and 550 injectors and it will safely raise FC. What PSI are you pushing from a stock CT-26? If you want to choose your own shift points then do a manual swap, much better in the long run and you won't have a sludgebox.

Well it looks like you are getting good advice so just to help you along I thought I would post a link for the Lexus a/f meter upgrade which will allow you to up the boost :iceslolan


http://rob.carlile.home.mchsi.com/lexus/lexus1.htm

With ECT on my tranny shifts just a pubic hair under redline at full boost

Well it looks like you are getting good advice so just to help you along I thought I would post a link for the Lexus a/f meter upgrade which will allow you to up the boost :iceslolan


http://rob.carlile.home.mchsi.com/lexus/lexus1.htm


At this time all I have had the chance to do is pull the turbo, remove all the carbon from the previous owner, and have it balanced. I have also opened up the exhaust. I have the stock turbo pushing quite a bit of pressure, although I dont actually know how much. I have not yet installed an aftermarket boost gague, only know its slaming the needle on the stock pressure gague, and its hitting the limit of the fuel-cut. The Auto tranny shifts about 2000 under redline, and also when the motor is cold the tranny dosent like to shift at all. Ive replaced a ton of shit to try to fix the cold shift problem, all to no avail. I was kinda hoping the computer may help the tranny and in the process give me a little performance. But it sounds like I need to look elsewhere for the tranny, and go to larger injectors for the performance.

The thing that I still don't understand, and that nobody has told me is that, if you do decide to switch from the 7mge to the 7mgte can you still use the same tranny or do you need the tranny, ecu, harness, and what else? I've been thinking about really doing the swap from the 7mge to 7mgte in my mkIII, but nobody specialiasis in my engine anywhere around here, and I don't want to spend 500$ on an engine that someone is gonna F*** up for me, cause they don't know what they are doing, what is your opinion on this guys...?

Another thing... did some of the mk3's came with a 5 speed tranny, cause all the ones I have seen were auto, what is your opinion on this?

also.... Ive been doing research for turbo upgrades, but in most of the websites that I see they have a turbo upgrade, they dont say if its for the turbo mk3 or the n/a, I feel so friggin lost, you guys have probably experimented quite a bit, so do you know if the n/a engine could handle the turbo upgrade, or should the 7mgte just get the turbo upgrade, cause it already has upgraded internals

I can tell you one thing hondaoz, mk3 supras did come in 5speed. I see a lot more autos tho

Like I've said atleast a thousand times, why cheap out and use the n/a block and electronics when Toyota already did all the work for you. They made the 7m-gte for a reason, to handle boost and higher HP levels and it does it wonderfully. If 7m-gte's and the electronics were much much harder to find I would agree, but there everywhere and cheap so theres no reason not to do the entire Turbo swap correctly. Also all turbo upgrades will be for the turbo of coarse, you can't upgrade a turbo you don't have. Both the turbo and n/a heads are exactly the same though, so a turbo manifold will bolt onto the n/a head.

The thing that I still don't understand, and that nobody has told me is that, if you do decide to switch from the 7mge to the 7mgte can you still use the same tranny or do you need the tranny, ecu, harness, and what else? I've been thinking about really doing the swap from the 7mge to 7mgte in my mkIII, but nobody specialiasis in my engine anywhere around here, and I don't want to spend 500$ on an engine that someone is gonna F*** up for me, cause they don't know what they are doing, what is your opinion on this guys...?

Another thing... did some of the mk3's came with a 5 speed tranny, cause all the ones I have seen were auto, what is your opinion on this?


My auto tranny went rather quickly and you will find that the tranny mated to the 7mgte is not very strong. I remember seeing an article in Sport Compact Car where someone built up an auto 7m-gte and even had the tranny beefed up and it still blew up several times, he decided to try a 5-speed. As for turbo upgrades there are plenty of options, check www.racetep.com, they do alot of work on the 7m-gte engines. I don't think it's worth the trouble to turbo an N/A engine unless you plan on beefing up the internals (pistons and rods).

The other option you have if you want a clean swap is to drop in a 1jz-gte twin turbo engine that was only offered in Japan. These engines are available in the U.S. and you can easily get 400 hp out of them without upgraded pistons and rods. They also are not known to blow head gaskets like the 7m-gte does. The down side is that most of the parts for this engine have to be imported.

thats all good though, but I thought about it carefully, and they way my budget is right now, I should just go ahead and get the 7mge and not worry bout the 7mgte, cause is way to much crap that I'm gonna have to go through to drop the engine in there, and find someone that will help me out with that and also the rewiring and other small things that could cause me quite a bit of cash, but I want to thank you guys for all your info.