P iss water and Jap tuned ECU??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Negreac · 09-10-2003, 01:01 PM

My clip came w/ a veilside tuned ECU. I compenstaed for everything so far that it may be tuned for except for the gas. I assume the ECU was tuned for max power from high grade japanese pump gas, whatever octane that may be. All I know that is probably better gas than I can get from the pump here. So what I need to know is how much I should retard the timing so I can use 93 octane and not blow my engine up. Any info or suggestions are appreciated. Thanks.

Yoshi · 09-10-2003, 02:31 PM

unless you're really thrashing on your engine, it's not that big a deal. run the engine, if it's knocking/pinging while idling, retard until it's ok

DJ Machine · 09-10-2003, 05:58 PM

supposedly the max octane in japan is 93, just like the USA..

kendot240 · 09-10-2003, 07:44 PM

according to inidial D max octane in Japan is 106. Not the most reliable source, but I'm alomost positive it's 100 or above

hookedup240 · 09-10-2003, 08:00 PM

just run some octane booster, this may help.

Nerfdude · 09-10-2003, 09:57 PM

octane booster adds like, a tenth of an octane... don't waste your money.
down the street here in STL, there's an Amoco that sells 110 octane...

FRpilot · 09-11-2003, 12:07 AM

but who can afford running race gas for daily driving everyday? isn't it like $5+ a gallon and prices are still going up up and up..

DJ Machine · 09-11-2003, 07:33 AM

japan uses a different rating system for that gasoline iirc.

100 is the equivalent of 93

240meowth · 09-11-2003, 03:53 PM

if i recall japan have a higher octang rating. from what i udnersatnd the rb25 motor uses around 103octang gas

driftstyre · 09-11-2003, 10:01 PM

The octane rating in Japan is completely different from the US rating. Gas in the US at 93/94 octane is equal to or better than anything rated at ~100 in the UK, Japan and Europe.

09-10-2003, 01:01 PM	#1
Negreac Zilvia Member Join Date: Dec 2002 Location: Detroit Age: 40 Posts: 199 Trader Rating: (0) Feedback Score: 0 reviews	P iss water and Jap tuned ECU??? My clip came w/ a veilside tuned ECU. I compenstaed for everything so far that it may be tuned for except for the gas. I assume the ECU was tuned for max power from high grade japanese pump gas, whatever octane that may be. All I know that is probably better gas than I can get from the pump here. So what I need to know is how much I should retard the timing so I can use 93 octane and not blow my engine up. Any info or suggestions are appreciated. Thanks. __________________ Don't pick fights with ugly people, they have nothing to lose...

09-10-2003, 02:31 PM	#2
Yoshi Post Whore! Join Date: Jul 2001 Location: Washington Age: 48 Posts: 3,003 Trader Rating: (1) Rides Gallery: Yoshi Feedback Score: 1 reviews	unless you're really thrashing on your engine, it's not that big a deal. run the engine, if it's knocking/pinging while idling, retard until it's ok __________________ www.360realms.com/S13-S15

09-10-2003, 05:58 PM	#3
DJ Machine Zilvia Junkie Join Date: Jan 2002 Posts: 549 Trader Rating: (0) Feedback Score: 0 reviews	supposedly the max octane in japan is 93, just like the USA.. __________________

09-10-2003, 08:00 PM	#5
hookedup240 Zilvia FREAK! Join Date: Dec 2001 Location: NJ Age: 41 Posts: 1,149 Trader Rating: (0) Feedback Score: 0 reviews	just run some octane booster, this may help. __________________ 1991 240sx se 5spd - sold 2003.5 Mazdaspeed Protege

09-11-2003, 07:33 AM	#8
DJ Machine Zilvia Junkie Join Date: Jan 2002 Posts: 549 Trader Rating: (0) Feedback Score: 0 reviews	japan uses a different rating system for that gasoline iirc. 100 is the equivalent of 93 __________________

09-10-2003, 07:44 PM	#4
kendot240 Leaky Injector Join Date: Jan 2003 Location: westchester Posts: 51 Trader Rating: (0) Feedback Score: 0 reviews	according to inidial D max octane in Japan is 106. Not the most reliable source, but I'm alomost positive it's 100 or above

09-10-2003, 09:57 PM	#6
Nerfdude BANNED Join Date: Jul 2002 Posts: 495 Trader Rating: (0) Feedback Score: 0 reviews	octane booster adds like, a tenth of an octane... don't waste your money. down the street here in STL, there's an Amoco that sells 110 octane...

09-11-2003, 03:53 PM	#9
240meowth Nissanaholic! Join Date: Dec 2001 Location: torrance, ca Age: 41 Posts: 2,407 Trader Rating: (4) Feedback Score: 4 reviews	if i recall japan have a higher octang rating. from what i udnersatnd the rb25 motor uses around 103octang gas __________________

09-11-2003, 10:01 PM	#10
driftstyre Zilvia.net Advertiser Join Date: Jul 2003 Location: Boston Age: 46 Posts: 748 Trader Rating: (4) Feedback Score: 4 reviews	The octane rating in Japan is completely different from the US rating. Gas in the US at 93/94 octane is equal to or better than anything rated at ~100 in the UK, Japan and Europe.