NO one said our stock car calls for race gas. Once again you failed to read the thread.

 

It's not? Pump some 87 and see what happens. Kaboom

So, on a stock 10.3to 1 compression car, the difference between 87 and 91 is big. So difference between 91 and 100 should be just as big.

Thanks for making me look smarter.

 

 

But it for the smell, it smells wonderful exiting the exhaust, yes it's expensive but it smells good. hehehe.

 

Yup, especially when you go into the leaded race gases.

 

yup. it smells great as it kills your oxygen sensors.

 

If 93 dynos higher than 91 why wouldn't 95 or so dyno better than 93? Or is 93 the magic octane that makes z's operate at maximum efficiency?

 

um...im guessing cause 90% of the us has a max of 93 at most pumps.

 

Well some of us don't mind.

But I do agree, anything under 600whp should be fine with 100 octane, there shouldn't be any knock being recorded with 100. No need to go any higher into the leaded gases.

 

You have never been to the dragstrip have you?

 

Yes I have, but MOST of us, dont buy gas from the dragstrip, we go to local GAS STATIONS.

 

because the ignition timing was tuned for high octane gas. But beyond the 93 pump taht the ECU was meant for, there's nothing to be gained.



OCTANE DOES NOT MAKE HORSEPOWER, IT HAS TO BE TUNED FOR HIGHER OCTANE TO MAKE THE HIGHER HORSEPOWER!

 

LOL. The question is for the OP.

 

Maybe this will help.
I asked Sharif about high octane on N/A w/ Utec in this thread, and he said they had tried it and didn't get any significant gain.

The major advantage to high octane is to prevent detonation. So, you could advance timing without knock. However, it seems that the VQ stops responding to added timing before it starts to knock. So, there wouldn't be a big difference.

 

Do you know what modifications the car had? and what does significant gains mean?

 

I don't know what you guys are smoking, but it must be strong.

I am living proof that 100 octane helped in my Z. You can either believe or not, but it does. Especially in hot weather where these engines do "knock", and if you have race gas it wont knock therefore you have more power.

The timing you guys are talking about is base timing. Base timing doesn't prove $hit. The ecu will advance timing until it detects knock, then it will retard until its gone, then advance again. That is the purpose of ignition timing.

Race gas will advance timing to the limit the ecu is willing to go without knock and it will keep it there all across the rpm range. So on a 105 degree day, a z with race gas vs a z with 91 octane. You're telling me they are equal in power? Sorry I don't buy it, I know race gas makes a difference and I can prove it if anyone in CA has the same mods as I do wants to do a quick run.

 

I agree with Backtuner 100%. We have tested this theory countless times on the dyno. Simply adding race fuel to an already well tuned NA or FI car will yield no whp/trq improvment.

 

That makes sense to me, but I don't know anything, evidently. I thought the higher the octane the more additives the gas had, lol. In essence, the higher the octane the more the "tuner" can advance timing. Hey, that is the limit of my knowledge.

 

again, increasing octane alone does not ADD power without a change in tune to adjust ignition timing for the additional octane.

 

^^ This is not aimed only at you....Dont you people read? We have been discussing the potential of higher octane WITH a tune. And this thread is going on and on w/no point to some post, only a few guys inn this thread have actually tried it, some say theyve seen power and some said no power.

So please if you are just talking out your *** move on.