can u run a tuned ecu on stock motor? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

lucas240sx · 05-27-2011, 11:48 PM

ive been searching but really havent found a true answer
i understand it wont run completely right....but
the ecu is tuned for 550,z32 maf, and 2871r turbo
i have 370,z32 maf, stock t25
would it make it want to run lean?

emu103 · 05-28-2011, 12:13 AM

I tried my friends ecu that was tuned for similar plus cams.
It was an emance ecu
My car would turn over and over and eventuallly fired up and ran like complete garbage for 2-3 seconds then died.
I have stock eveything.
From that i would say no....

Your z32 mafs probably makes the biggest difference in compatability.

lucas240sx · 05-28-2011, 12:21 AM

yea it runs it but u can tell theres a miss
any way of put the ecu back to stock settings?

besTint · 05-28-2011, 12:27 AM

depends on the ECU. like a AEM EMS, you can easily set to stock calibrations with a laptop.

a chipped ECU is harder. probably need to find a tuner who can.

tabasco122 · 05-28-2011, 12:33 AM

biggest thing is your injectors and maf, so since your injectors are different, it will run lean unless you adjust for it with a fuel pressure bump, but even then thats not a great way of doing it

lucas240sx · 05-28-2011, 12:39 AM

ok......well sounds like as long i need to upgrade my injectors and it should be fine
what kins of gas mileage do u guys get with the 550?

Jdm240sx123 · 05-28-2011, 12:51 AM

Why don't you just get that baller ECU tuned to match your set up??? Injectors ain't cheap. Lol

It will run lean as is...

*fliprayzin240sx* · 05-28-2011, 12:52 AM

Why dont you just get the ECU rechipped?

PS: 550cc injectors are too small for GT2871R if thats what you plan on running later down the road. You'll need atleast 660cc injectors but most folks run 740cc since they're more readily available.

usdm180sx · 05-28-2011, 12:53 AM

Why the fuck would you want to do that?

lucas240sx · 05-28-2011, 12:58 AM

i didnt realize u would need at least 660
thx for all the help guys

Jdm240sx123 · 05-28-2011, 01:00 AM

Rechipped???? Just tune that bitch.... Haha

05-27-2011, 11:48 PM	#1
lucas240sx Zilvia FREAK! Join Date: Sep 2006 Location: shawnee,okl Age: 34 Posts: 1,299 Trader Rating: (16) Feedback Score: 16 reviews	can u run a tuned ecu on stock motor? ive been searching but really havent found a true answer i understand it wont run completely right....but the ecu is tuned for 550,z32 maf, and 2871r turbo i have 370,z32 maf, stock t25 would it make it want to run lean?

05-28-2011, 12:27 AM	#4
besTint Post Whore! Join Date: Mar 2008 Location: Stanton, CA Posts: 2,641 Trader Rating: (81) Rides Gallery: besTint Feedback Score: 81 reviews	depends on the ECU. like a AEM EMS, you can easily set to stock calibrations with a laptop. a chipped ECU is harder. probably need to find a tuner who can. __________________ http://squarespokes.com/

05-28-2011, 12:52 AM	#8
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	Why dont you just get the ECU rechipped? PS: 550cc injectors are too small for GT2871R if thats what you plan on running later down the road. You'll need atleast 660cc injectors but most folks run 740cc since they're more readily available. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

05-28-2011, 12:53 AM	#9
usdm180sx Post Whore! Join Date: Dec 2005 Location: 562 Posts: 4,807 Trader Rating: (5) Rides Gallery: usdm180sx Feedback Score: 5 reviews	Why the fuck would you want to do that? __________________ -Norm!

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05-28-2011, 12:13 AM	#2
emu103 Zilvia Member Join Date: Mar 2009 Location: nc Age: 31 Posts: 185 Trader Rating: (4) Feedback Score: 4 reviews	I tried my friends ecu that was tuned for similar plus cams. It was an emance ecu My car would turn over and over and eventuallly fired up and ran like complete garbage for 2-3 seconds then died. I have stock eveything. From that i would say no.... Your z32 mafs probably makes the biggest difference in compatability.

05-28-2011, 12:21 AM	#3
lucas240sx Zilvia FREAK! Join Date: Sep 2006 Location: shawnee,okl Age: 34 Posts: 1,299 Trader Rating: (16) Feedback Score: 16 reviews	yea it runs it but u can tell theres a miss any way of put the ecu back to stock settings?

05-28-2011, 12:33 AM	#5
tabasco122 Zilvia Junkie Join Date: Feb 2011 Location: Houma, LA Age: 32 Posts: 321 Trader Rating: (5) Feedback Score: 5 reviews	biggest thing is your injectors and maf, so since your injectors are different, it will run lean unless you adjust for it with a fuel pressure bump, but even then thats not a great way of doing it

05-28-2011, 12:39 AM	#6
lucas240sx Zilvia FREAK! Join Date: Sep 2006 Location: shawnee,okl Age: 34 Posts: 1,299 Trader Rating: (16) Feedback Score: 16 reviews	ok......well sounds like as long i need to upgrade my injectors and it should be fine what kins of gas mileage do u guys get with the 550?

05-28-2011, 12:51 AM	#7
Jdm240sx123 BANNED Join Date: May 2011 Location: LAS VEGAS Age: 27 Posts: 36 Trader Rating: (0) Feedback Score: 0 reviews	Why don't you just get that baller ECU tuned to match your set up??? Injectors ain't cheap. Lol It will run lean as is...

05-28-2011, 12:58 AM	#10
lucas240sx Zilvia FREAK! Join Date: Sep 2006 Location: shawnee,okl Age: 34 Posts: 1,299 Trader Rating: (16) Feedback Score: 16 reviews	i didnt realize u would need at least 660 thx for all the help guys

05-28-2011, 01:00 AM	#11
Jdm240sx123 BANNED Join Date: May 2011 Location: LAS VEGAS Age: 27 Posts: 36 Trader Rating: (0) Feedback Score: 0 reviews	Rechipped???? Just tune that bitch.... Haha