Can you run a Gen 3 540cc or Supra 550cc on a late model 11/92 Mr2? Which seem to have Gen 3 setting with the Rev 11/92 standard ECU. The boost/fuel cut comes in at 16.5 psi. This car seem to have gen 3 body with a gen 2 motor. I do have a drill out and enlarge gen 2 fuel rail in the shed waiting to install. Also have bigger fuel pump waiting if I was to change to E85. What injector size? There lots done to the motor already. I am trying to get boost on at the lowest rpm as possible with 220 to 250rwkw. I know I will need a ECU. Need to price it up the e85 upgrade.
 
This the current turbo on it.
Garrett GT2860RS Ball Bearing Turbo (Disco Potato)
Approx Horsepower Range for Engine Capacity: 250-320Hp
CHRA(core): 446179-5066
Compressor Housing: 446296-0015
Compressor Housing Air Ratio: 0.6
Compressor Wheel Inducer Size (mm): 47.22
Compressor Wheel Trim: 62
Turbine Wheel Exducer Size (mm): 46.95
Turbine wheel Trim: 76
Turbine Housing & Air Ratio Size: 0.64
Turbine Housing Inlet port: Single
Integral Wastegate: YES
Actuator Pressure (psi/kpa): 12.00 / 82.74
Water Cooled Centre Housing: YES
Ball Bearing: YES
 
Thank for any advise!

Dont think 540 will flow enough with e85.

Highly recommend just going to top feed rail and bosch 1000cc injs for e85.

Take at least 30 percent off for your required cc to match hp desired if running e85. Injectors big enough for e85 are top feed so your rail is no use.

Personal choice e85 vs Ron (with added cooling).

Gen3 will run in your side feed rail, so will Denso, Sard and others up to 800cc.

Standard injectors as per a forum members recent dyno was unsafe at above 14psi.
Did you forget the motor and mls head gasket yourself or someone tell you that it's been done (learning experience was mine was said to have been done and when opened the engine it wasn't).

E85 or any injector upgrade needs supporting components, leave budget for aspects like fuel pressure regulator ($250) fuel line and fittings ($250) ECU upgrade and then a dyno tune ($4,000 give or take).

Trying to impact low rpm boost will come from various air flow / temp aspects. Boosting lower is solved with a smaller or newer design turbo (allocate about $5k+), changes in cams ($2.5k+ Inc dyno), bigger displacement. There is no quick solution to get the best of all worlds with turbos, spool is cool but needs minimum amount of air to push it hard.

Thanks for the input.
Can I run a Gen 3 540cc or Supra 550cc on a late model 11/92 Mr2 with Rev 11/92 standard ECU? 

TonyMR2
Did you forget the motor and mls head gasket yourself or someone tell you that it's been done (learning experience was mine was said to have been done and when opened the engine it wasn't).

I have built 3sgte the motor has all the goodies like Blue printed, balance Forge internal motor. Even a brand new steal crank from Japan. With enlarged oil feed in the block and oil jets, done by John Moyle Engineering. John Moyle Engineering and I built this motor with ARP, Cosmo, Wisco, parts etc. Even the flywheel pressure plate is balanced with a six puck from the US. GT28RS (Disco Potato) with a .61 trim. Also custom plumbing and inter cooler.

Yes drop it in and the car will run.

To do it properly and reasons why it doesn't work by a straight drop in.

Injectors. Yes Gen3 mr2 injectors and other low impedance side mount (mr2 fuel rail) injectors will drop in and work off th ECU and the car will run. Buyer beware of second hand injectors - get them ultrasonic cleaned and flow tested before thinking they might work.

Airflow meter. If you have upped the boost to say 10-14psi, then yes put in the upgraded injectors. Factory ECU with airflow meter limits - you don't want to exceed 14-16psi max.

ECU. The stock ECU has a small amount of adjustment through the airflow meter setting. However will run the factory computer map. Piggy back ecus for mild fuel adjustment (+/- 20%). Stand alone ecus allow for a new map so far greater adjustment and a delete of the airflow meter restrictions in signal.

Aftermarket fuel pressure regulator and fuel rail. Factory designed injectors to push out fuel against a certain amount of air pressure (boost). When you increase the air pressure (boost) you create back pressure to your injectors, therefore you need to increase your fuel pressure to your injectors (hence aftermarket adjustable fuel pressure regulator).

Dyno. You need a dyno tune for correct air/fuel ratio throughout all rpm range. If you just drop the injectors in, you will likely will see big block smoke out your exhaust at various acceleration points, it's un burnt fuel from incorrect a/f ratio (so instead of spending money on a tune your blowing it out your exhaust).

TonyMR2
Yes drop it in and the car will run.

To do it properly and reasons why it doesn't work by a straight drop in.

Injectors. Yes Gen3 mr2 injectors and other low impedance side mount (mr2 fuel rail) injectors will drop in and work off th ECU and the car will run. Buyer beware of second hand injectors - get them ultrasonic cleaned and flow tested before thinking they might work.

Airflow meter. If you have upped the boost to say 10-14psi, then yes put in the upgraded injectors. Factory ECU with airflow meter limits - you don't want to exceed 14-16psi max.

ECU. The stock ECU has a small amount of adjustment through the airflow meter setting. However will run the factory computer map. Piggy back ecus for mild fuel adjustment (+/- 20%). Stand alone ecus allow for a new map so far greater adjustment and a delete of the airflow meter restrictions in signal.

Aftermarket fuel pressure regulator and fuel rail. Factory designed injectors to push out fuel against a certain amount of air pressure (boost). When you increase the air pressure (boost) you create back pressure to your injectors, therefore you need to increase your fuel pressure to your injectors (hence aftermarket adjustable fuel pressure regulator).

Dyno. You need a dyno tune for correct air/fuel ratio throughout all rpm range. If you just drop the injectors in, you will likely will see big block smoke out your exhaust at various acceleration points, it's un burnt fuel from incorrect a/f ratio (so instead of spending money on a tune your blowing it out your exhaust).

Thanks
I already have a sards Fuel regulator on it, with set pressure at 38psi at the moment was not planning to go above 16psi boost with standard ECU. I also have innovate wideband AFM gauge. Why ask this question, is I can take 440cc injectors and clean them or get some 540cc injectors. My logic was with the 540cc injectors was to adjust fuel pressure and push boost to 17psi max, that's the limit of the efficiency range of the GT28RS (Disco Potato) with a .61 trim. This car is to be a daily driver setup. As I have two sdubs the other one is a 342 rwkw beast that on e85 and has everything you have mentioned.

Alternatively get your injectors to a fuel injector specialist that can clean and high flow your injectors...

Comes down to what you want to spend.

TonyMR2
Alternatively get your injectors to a fuel injector specialist that can clean and high flow your injectors...

Comes down to what you want to spend.

I do that I think.

I am just about to upgrade my injectors as I have just had haltech ps1000 & wideband controller fitted....I was advised against upgrading to rev3 540 injectors as they are OLD technology... I was advised to use current modle injectors such as xspurt as the have a much better spray pattern and are very easy to tune