yes. it bothers me when people talk like they know WTF is going on and then people read it and take it as fact and go on believing that.

its idiotic

 

All of this 100 octane vs 93 octane has me confused.

I ran my car at the track, pulling 12.9s w/ 107ish trap speeds on a fresh retune without touching a thing. Dump a bunch of c-16 in the tank, and I run 12.6 @ 113.8. I didn't up the boost, I didn't change a thing.

I would think 100 octane would have the advantage, my car seems to run so much smoother on higher octane, even at idle, I would think that smoothness would have something to do with efficiency, thus 100 > 93 even on a stock car.

I wouldn't say that it's a huge advantage, but I would say there is SOME advantage. If there was none, why aren't people pulling 12.89s on 93?

 

If the ECM doesn't pull any timing on 93 octane, then the additional octane will not help, infact too much octane can make less hp. (I am going to guess it will be an insignificant difference in this case) So it really depends on how it runs on 93.

 

Oh, while you're all on your high and mighty I'm so smart kick, I wanted to ask you a question:


Being as you have cam gears, did you adjust timing using them? Or is it just CDI?

 

I agree some of you ppl are rediculous........dont get mad at this guy just because he had a better time than you jeeez haha

 

nice... go IX =]

 

nice job. thats not stock though.

 

You would think that if the boost settings and every thing else is unchanged, then that car is still stock!

I dont think mitsu will void a warranty for using 100 in the tank.

Thats like saying "it wasnt' stock because you didn't have the recommended tire pressure"

In my opinion that was a stock run and would probably still make it in the 12's on 94. The only thing the 100 octane helped with was lack of timing being pulled and no detonation. The boost he said was still stock.

Thanks

 

qsujeff55 is right, on a stock map, extra octane should not make a difference. I dont see any reason for engine knock on a stock ecu tune. In fact, on an NA car, Im willing to bet adding a higher octane mix with no adjustments would probably slow the car down.

 

haters will always be haters.......


good job on the run though....

 

Prove your statement

 

Agreed. But there is something that might make a difference. Sunoco GT100, for instance, has a lower density than most pump gas (despite lots of toluene). Leaded race gas tends to be even less dense. That makes a small change to the AFR, leaning it out a bit. If you've been running on GT100 for a while then during closed loop the ECU learns this (from O2 feedback) and adjusts the fuel trims and I assume (but it's just a guess) that the learned fuel trims have some effect during open loop and WOT operation. But if you've just dumped the race gas in the ECU doesn't know any better and continues to inject the same *volume* of fuel. I don't think it could be much of a difference, though. And even 12.99 from a mid-priced 4-door is still freakin' sweet!

Dave

 

Was his car the 6-speed or 5-speed just curious.

 

1. Stock is mapped for 91. Using 100 is just a saftey net and would make no difference in perf. Again!
2.Time slip please... (even though I can make one in photo shop in about a minute)
3.Mr. Warralton? Curious to see what this guy has to say.
4.Sweet run.

 

You gotta be kidding me. How ridiculous. I know you didn't have a means of raising boost, but I run about .4s and 4mph faster on race gas...

And before anyone repeats it, yes, I know about race gas and how the best way to take advantage of it is by raising boost and leaning out the AFRs, so it wouldn't seem like 100oct would make a difference when on stock boost and tune, but we just don't know that.

If 100oct makes no difference, why was he using it? You can't come on here and make a claim like this then say you're on race gas. I get MORE of a gain from race gas than people get from CAMS. Think about that. I gain an estimated 40whp when I am on race gas. Again, if he 100 is the same as 93 or 91 (whatever his state uses), then why wasn't he using it?

This doesn't take away from the fact that the IX is strong and that this guy accomplished something great even despite the 100oct, but keep it in perspective. He hasn't yet explained how he got a 1.7 when the stock limiter is in place, so I'd like to hear that. I'd just like to see this feat accomplished on pump gas (91, 93, 94).