The gasoline problem.

[KaOz]

Sean,

I am wondering if you can give any other recommendations in regards to the octane issue we are facing.

Cheers,
KaOz.

[JZ]

Based on what I'm reading it doesn't look like we're facing any proiblems, since our Sunoco 94 is more than adequate. Only message is that if you've got a Skyline with a Japanese tuned ECU (mines) you'll need to change it or you'll go pop. Of course SG will carry that...

[R32GTR]

ya, but 94oct you should be ok even with the upgraded ecu. I believe Sean said that they went pop on 91oct.

If you do by chance get a Mines ECU, just install a water injection kit, like aquamist, and you should have no problems with detonation.

Of course, I would run the car on the dyno. with the wides to make sure your good to go.

[tyndago]

I am wondering if you can give any other recommendations in regards to the octane issue we are facing.

First someone needs to find out for sure how they measure the octane of the fuel you have . Is it (MON+RON) /2 . If it is , and its 91 , then thats what we run on in SoCal.

[KaOz]

I just contacted Sunoco... so within 24 hours, I should have that answer for you Sean et al.

Cheers,
KaOz.

[13th-angel]

Found this information on anoter site:

This is a company posting!

Your Topic "Sunoco Reply1"

what is the MON rating of your 92 and 94 octane gas?

Your Comment on 04/24/2003 at 09:10 AM
Thanks for your question.
For Sunoco ethanol Ultra 94 gasoline, our specification is a R+M/2(RON + MON/2) of 94.0 minimum. This is the posted road index on our pumps and the standard throughout North America. Our typical RON for Ultra 94 is 99 min. and MON is 87 min.

For Sunoco Regular gasoline, our specification is a R+M/2 of 87.0 min. Our typical RON is 91 min. and MON is 82 min.

We recommend selecting the right octane fuel at the pump instead of adding octane boosters.

[berzerk]

oh yours is ethanol too, that's what we have in winnipeg at 2 mohawk stations. ive heard bad things about ethanol though

[tyndago]

So there you go.... 99 RON... for Sunoco 94. Run that stuff...... no problems

If you can't afford the best stuff available for your GT-R.... YOU SHOULD NOT DRIVE A GT-R.


Its a high perfomance car , not a normally aspirated GEO METRO.

Turbo cars require high octane to help prevent against detonation and pre-igniton.

You can ping the hell out of most NA cars , but a Turbo car will do some interesting things.

Theres some stuff about dynamic and static compression ratios.....as the boost goes up - sos the effective compression ratio...

[VERTiG0]

How about the RB20DET? Should 94 still be run in that, or is the 91 sufficient?

[R32GTR]

When you guys do get your GTRs, and if they are out of the good stuff at the pumps, you can still put the bad stuff in, but just do NOT BOOST. I know its comon sense, but some of the guys I have talked too seem to think that you can only put the premium in, or it will blow the engine.

I would treat the other turbo nissan engines the same.

[tyndago]

When you guys do get your GTRs, and if they are out of the good stuff at the pumps, you can still put the bad stuff in, but just do NOT BOOST. I know its comon sense, but some of the guys I have talked too seem to think that you can only put the premium in, or it will blow the engine.

I would treat the other turbo nissan engines the same.

Go to another gas station if they don't have premium.

If you HAVE to put gas in - put only a few gallons....

One tank , one round of detonation can and will blow your motor.

All it takes is for conditions to be right , and there goes #6.... Or there goes the exhaust wheel.

[Godzilla]

so to recap....


highest octane gas you can get
not aftermarket JDM ECU

check its all good........I will be using the highest gas I can get in Edmonton which is 91. AND I don't jave to worry about the ECU cause I am getting an APEXi POWER FC and AVC-R.

Steve

[3SGTE]

You should be fine with 94octane even with a JDM ECU.
I swap my engine, to JDM and swap the ecu also on my sw20 and currently running 94octane and i dont find a problem.

Accept 91, i cannot get full potential. Would not boost properly.

[The Stig]

Out of curiousity, does anyone know what RON levels JDM ECU's are tuned for? I believe they offer ~92 and 97, and then 105 for the premium over there.

[Daemos]

hmmm...

We have mohawk...but I need to fillup every week, and the closest mohawk that serves 94 octane is across the city....

damnit >< bad bad bad ><

*goes to contemplate*

So no boost eh....