MR2 turbo 3SGTE 3rd gen questions - MR2 Owners Club Message Board
 
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post #1 of 5 (permalink) Old April 17th, 2017, 12:31 Thread Starter
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MR2 turbo 3SGTE 3rd gen questions

So new to me car:
3rd gen swap
Apexi Power FC ECU
T4 turbo AR50
generic bov and wastegate
currently semi tuned running at 8 psi

What i can't do:
No high octane fuel, think it's 90/91 at best.
Can't get the car tuned by a professional (small island have to move car by boat)
No Dyno

Car issues:
Oil leak from the oil pump gasket
Running on 8psi

My options:
rehaul the motor, replace rubber seals and keep it running how it is
Do a gen 4 swap

My friend wants us keep and the motor and just refurbish it, I want to do a swap because i want something reliable that i won't always have to be fixing and tweaking, I don't mind keeping it as is; if i can get a guaranteed reliable tune and it's something i can rely on daily.

What are your suggestions guys? looking forward to hearing from you all. Thank you
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post #2 of 5 (permalink) Old April 17th, 2017, 12:39
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First thing I would do is put CT20B turbo and stock ECU back. What is the point of running aftermarket ECU if you cannot tune it? Plus you want a reliability and stock ECU is a way to go. How bad is an oil leak? Maybe need to do a timing job as well and at the same time change the gaskets?
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post #3 of 5 (permalink) Old April 17th, 2017, 12:56 Thread Starter
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Quote:
Originally Posted by 2ZZXRS View Post
First thing I would do is put CT20B turbo and stock ECU back. What is the point of running aftermarket ECU if you cannot tune it? Plus you want a reliability and stock ECU is a way to go. How bad is an oil leak? Maybe need to do a timing job as well and at the same time change the gaskets?
Well yes I definitely would do a timing job seeing as it's new to me whilst the motor is out. i considered getting a 3rd gen stock ECU but everything i've seen is 500+ and i'm guessing the CT20 is 500+as well. the costs of so far returning it to stock seems to run me about 1500.

I can get a 4th gen motor for that cost, plus the wiring at 500 and everything else i can fabricate. thats why i'm kinda leaning on the swap

The oil needs to be topped up on a weekly basis

Oh and BTW there a few sensors missing on the car such as the MAP sensor, haven't verified the rest

Last edited by flyhotstuff; April 17th, 2017 at 12:59.
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post #4 of 5 (permalink) Old April 17th, 2017, 13:17
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3rd gen ecu should cost about 200, I saw them as low as 150. Map sensor is is another 100-150 dollars. I am not familiar with other turbos but it could be that stock ecu will be fine with this one. so your cost could be $300. Gen4 is a great engine, but Gen3 is not far behind. Just my opinion. Besides if that works you could sell the Apexi and make some money on top of what you spent.
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post #5 of 5 (permalink) Old April 19th, 2017, 21:57 Thread Starter
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Hey, just to update, I had the car rev limit at 6500 and we raised it to 7000rpm and we're making 1 bar (14.5 psi) of boost. We don't have any detonation, neither does it seem be running rich or lean, no breaking up in the higher revs and it's pulling hard, Gonna install a wideband tomorrow to verify what we're thinking.

Now, i don't mind rehauling this motor and keeping it, After speaking with the guy i bought it from he told me that the "tuner" gave it a safe tune with a safe AFR and nothing aggressive. If that's the case i could just save money on the swap and do other things i'd like to do with this car.

What are your suggestions with me keeping the Gen 3 motor, I quite like the feel with this boost level. How reliable can i expect the engine to be? considering i don't know the history of it nor the original mileage. I'd like something i can keep around for a while and daily it
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