Tuning options for 7MGTE

[UNATUL APIRTED]

hey there. been awhile since ive made a post. finally got my first small project together with my first build. made a few minor upgrades..mostly bolt-ons. wondering what options i have for tuning for this car. Ive herd of using Maft Pro but thats not really a tuneable system as far as the info ive read. obviously a stand alone system would be the best option but just curious on what some people have used. Thx

[bgrieger]

I personally went standalone. I was going to go maft pro as they are quite a powerful tuner for bolt on applications, but the price was right for the system I installed as I knew the previous owner of the ECU. It depends on what you need. If this is an upgraded CT-26, I'd say you can't go wrong on a maft pro, but learn all you can on it and be prepared for someone with experience to help get the most out of it.

[UNATUL APIRTED]

ya a stand alone is what id like to do if the price was right. well i did an aftermarket t4 turbo and manifold. i believe its about a 57trim turbo. unfortunatly at the time i didn't have money for a legit turbo upgrade so i kinda pieced one together..which now i regret doing, but it will do for the time being. so its the turbo, manifold, hks 50mm wastegate, new aftermarket FMIC, stock injectors, Areomotive adjustable FPR, Walboro 255 fuel pump, custom 3" downpipe 3" test pipe and 3.5" Flowmaster catback system, AEM wideband o2 sensor, 6 puck clutch and fidanza flywheel. so ya mostly bolt ons and what not. just looking for some suggestions. car runs great actually on 10psi..runs quite rich but id rather it that then lean :-)

[bgrieger]

True statement on rich...to a point. I still think the MAFT pro is about the most cost effective solution for you, and gives the most tuning capability short of standalone.

[UNATUL APIRTED]

ya i know its to a point..to rich isn't good either which its almost getting to that point. I was thinking about going with maft pro for the time being so i may go with that. thanks for the help. do you happen to know about what psi the factory injectors are capable of handling? i know the upgrade is going to the 550cc with the Lexus 1uz MAF..but i get maft pro that eliminates the MAF right and you use a MAP and IAT sensor?

[bgrieger]

You might get some beyond fuel cut, but I wouldn't trust them. Too many things can go bad with a big turbo when you're trying to squeeze injectors too far!

[UNATUL APIRTED]

ok so its coming to the point of buying injectors and MAFT Pro. i would like to squeeze out between 16-18psi. what do you suggest for injectors. i have the option of 550cc or 720cc.

[bgrieger]

Injector sizing is about matching to airflow. Boost pressure is irrelevant. Do you have a map of your turbo handy? I remember it was something about a 57 trim, but I don't remember the frame size.

[UNATUL APIRTED]

no i do not have a turbo map for my turbo. but i do want to change my turbo already...to much lag and to high of a/r ratio.

[bgrieger]

If you're going to change turbos I'd save my pennies and purchase injectors matched to the flow characteristics of what you're changing to. What turbo do you have in mind?

[UNATUL APIRTED]

i dont really have one specifically in mind. i would like something that doesn't have as much lag but can still handle up to and hold from 16-20psi. preferably a t4 flange so i dont have to change manifolds and a 3in v-band exhaust. any ideas?

[bgrieger]

The GT-35R is well loved. The 550's will serve you well with a MAFT pro on that setup. Anything larger is hard to tune properly at idle even with standalones...I have been told the piggybacks are a bear to get right...if you ever do.

[jlspec]

Before pushing all that power make sure to prep the motor correctly. Metal Head Gasket, Injectors, Stand alone, and due to age maybe a rebuild of sorts.

[aloshan]

AEM EMS seems to be most popular for the 7m lately