Auto VS Manual? (ecu) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

vinhisbored · 06-17-2005, 12:45 AM

Well, I did my 5 speed swap about 2 months ago, and me and a friend were messing around on a roll of 4. He has a SOHC fastback, and I have a S14 kouki. Anyhow, he claims that he caught up with me.. on a ROLL of 40 in 3rd, when I was in 2nd. So, I guess my car's running pretty bad. Anyways, does anyone know if there is a major difference in how a car performs if it has either a MANUAL or an AUTO ecu? My friends tell me that because I'm using the AUTO one, it's slowing me down. Is this true? Please let me know guys..

orion::S14 · 06-17-2005, 07:19 AM

Not true...

My car ran great after my 5-sped swap, when I still had the auto ECU.

The fuel/timing curves are the same...the auto ECU has some auto-trans related OBD stufff, but that DOES NOT affect performance.

His car is probably lighter than yours by ~150lbs, depending on model.

- Brian

vinhisbored · 06-17-2005, 10:20 AM

Quote:

Originally Posted by orion::S14

Not true...

My car ran great after my 5-sped swap, when I still had the auto ECU.

The fuel/timing curves are the same...the auto ECU has some auto-trans related OBD stufff, but that DOES NOT affect performance.

His car is probably lighter than yours by ~150lbs, depending on model.

- Brian

Oh, so other than the check engine/service engine light coming on.. than it's all the same. Do you think there will be any more of a difference if I were to install a manual one in? (Which I'm still looking around for.. I need to purchase one.) And yes, his car is alot lighter than my car. I'm saying about 400 lbs at least.

24Dee · 06-17-2005, 10:31 AM

Quote:

Originally Posted by vinhisbored

his car is alot lighter than my car. I'm saying about 400 lbs at least.

There is your answer.

TachyonS14 · 06-17-2005, 12:42 PM

Auto ECU should help you because to my knowledge it has no speed limiter on it.

06-17-2005, 12:45 AM	#1
vinhisbored Zilvia FREAK! Join Date: Apr 2005 Location: socal Posts: 1,359 Trader Rating: (15) Feedback Score: 15 reviews	Auto VS Manual? (ecu) Well, I did my 5 speed swap about 2 months ago, and me and a friend were messing around on a roll of 4. He has a SOHC fastback, and I have a S14 kouki. Anyhow, he claims that he caught up with me.. on a ROLL of 40 in 3rd, when I was in 2nd. So, I guess my car's running pretty bad. Anyways, does anyone know if there is a major difference in how a car performs if it has either a MANUAL or an AUTO ecu? My friends tell me that because I'm using the AUTO one, it's slowing me down. Is this true? Please let me know guys..

06-17-2005, 07:19 AM	#2
orion::S14 Nissanaholic! Join Date: May 2003 Location: Orange Park, FL Posts: 1,666 Trader Rating: (0) Feedback Score: 0 reviews	Not true... My car ran great after my 5-sped swap, when I still had the auto ECU. The fuel/timing curves are the same...the auto ECU has some auto-trans related OBD stufff, but that DOES NOT affect performance. His car is probably lighter than yours by ~150lbs, depending on model. - Brian __________________ www.KA24DEvelopment.com

06-17-2005, 12:42 PM	#5
TachyonS14 Zilvia Member Join Date: Sep 2003 Location: SoCal Posts: 191 Trader Rating: (0) Feedback Score: 0 reviews	Auto ECU should help you because to my knowledge it has no speed limiter on it. __________________ 1997 240sx 5spd