ROM Tuned ECU? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Carlwill · 06-19-2005, 05:32 PM

When I purchased my Silvia, I was told that it was ROM tuned but I am not sure exactly how that works with the OEM ECU system.

Does anyone see a difference between my ECU and a standard OEM SR20DET (redtop) ECU?

Here are some pics...

Thanks for any assistance.

- Carlos

sr240mike · 06-19-2005, 06:18 PM

The board thats risen above the main board is called a daughterboard. I've seen that board before and its for DIY tuners, and is most likely not a commercial tune. Where did u get it from and is there a sticker on the cover of the ecu?

Nostradamus · 06-19-2005, 06:22 PM

Commercial tuners use it also. In order to ROM tune an s13 sr20 you need a daughterboard. Yes your ECU was ROM tuned.

Carlwill · 06-19-2005, 07:05 PM

Thanks for the clarification on the "daughter board". Just curious since the car came with a ROM tune, I don't know exactly what benefits I get from a ROM tune.

***S14DB*** · 06-19-2005, 08:07 PM

Don't ever take those white stickers off.

The ROM tune alows you to keep all the ECU functions while triming the maps for you new set up.

*fliprayzin240sx* · 06-20-2005, 01:13 AM

Better timing/fuel curve, higher or no rev limit, no speed cuts at 120 mph, tuned for higher boost *more than likely 14 psi*. Down side is always remember that its tuned for japanese 100 octane, piss water 91 octane sucks

Carlwill · 06-20-2005, 04:57 AM

Does anyone know if this Redtop ECU will swap over to a s13 Blacktop motor? I think I read somewhere that the ECU's wont swap over for some reason.

Oh and we get 93 octane piss water over here ...

***S14DB*** · 06-20-2005, 07:54 AM

Quote:

Originally Posted by fliprayzin240sx

Better timing/fuel curve, higher or no rev limit, no speed cuts at 120 mph, tuned for higher boost *more than likely 14 psi*. Down side is always remember that its tuned for japanese 100 octane, piss water 91 octane sucks

Japan has 100 and 95 octane gas cause they only use RON to rate their gas. We however use RON+MON/2(on every gas pump). 100 Japanse octane is closer to our 93.

06-19-2005, 05:32 PM	#1
Carlwill Zilvia Member Join Date: Mar 2005 Location: Orlando, FL Age: 45 Posts: 238 Trader Rating: (0) Feedback Score: 0 reviews	ROM Tuned ECU? When I purchased my Silvia, I was told that it was ROM tuned but I am not sure exactly how that works with the OEM ECU system. Does anyone see a difference between my ECU and a standard OEM SR20DET (redtop) ECU? Here are some pics... Thanks for any assistance. - Carlos __________________ Linux System Administrator rm -Vfr /etc/nix* "Love is a fist"

06-19-2005, 06:18 PM	#2
sr240mike Zilvia FREAK! Join Date: Apr 2004 Location: California, Norcal biiaatch Posts: 1,185 Trader Rating: (0) Feedback Score: 0 reviews	The board thats risen above the main board is called a daughterboard. I've seen that board before and its for DIY tuners, and is most likely not a commercial tune. Where did u get it from and is there a sticker on the cover of the ecu? __________________ TWO IN THE COOT, ONE IN THE POOT

06-19-2005, 06:22 PM	#3
Nostradamus Zilvia Junkie Join Date: Sep 2003 Location: poolhall ma Posts: 355 Trader Rating: (0) Feedback Score: 0 reviews	Commercial tuners use it also. In order to ROM tune an s13 sr20 you need a daughterboard. Yes your ECU was ROM tuned. __________________

06-19-2005, 07:05 PM	#4
Carlwill Zilvia Member Join Date: Mar 2005 Location: Orlando, FL Age: 45 Posts: 238 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for the clarification on the "daughter board". Just curious since the car came with a ROM tune, I don't know exactly what benefits I get from a ROM tune. __________________ Linux System Administrator rm -Vfr /etc/nix* "Love is a fist"

06-19-2005, 08:07 PM	#5
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Don't ever take those white stickers off. The ROM tune alows you to keep all the ECU functions while triming the maps for you new set up. __________________ Comments should be taken as Opinions not as Statements of Fact

06-20-2005, 01:13 AM	#6
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	Better timing/fuel curve, higher or no rev limit, no speed cuts at 120 mph, tuned for higher boost more than likely 14 psi. Down side is always remember that its tuned for japanese 100 octane, piss water 91 octane sucks

06-20-2005, 04:57 AM	#7
Carlwill Zilvia Member Join Date: Mar 2005 Location: Orlando, FL Age: 45 Posts: 238 Trader Rating: (0) Feedback Score: 0 reviews	Does anyone know if this Redtop ECU will swap over to a s13 Blacktop motor? I think I read somewhere that the ECU's wont swap over for some reason. Oh and we get 93 octane piss water over here ... __________________ Linux System Administrator rm -Vfr /etc/nix* "Love is a fist"