However, your not stock though like he is.

 

Agreed I would like to see a timeslip

 

wow! I'm surprised at the fact it took Mistar Warrtalon FIVE whole pages to chime in...

anyway, high 12's is still pretty impressive for a $10 "mod". good run.

 

And?

You quoted me as saying "I know you didn't have a means of raising boost" which infers that I do have a means of raising boost and know that it makes more of a difference than when stock. I know I'm not stock, but you DON'T know that 100oct didn't give him more power.

No 12.8s will be legit when it's on 100oct.

 

Im no expert on fuels but even my Lexus GX 470 manual states that performance will be increased with 91 octane vs. 87 Octane but that 91 octane is not required.

My gut tells me running 100 vs. 91-93 etc. will increase performance in a late model turbocharged car with an ECU what can adapt to fuels both up and down the performance spectrum. Boost would not have to be increased to see this.

Its a well known fact that higher octane fuels vs. lower octane fuels have the same energy BUT the higher octane fuels allow for more use of this energy. I believe your good driving + the IX tweaks vs. the VIII + the 100 octane all contributed to the timeslip. I also believe this time would be reduced on 91-93 gas.

Just my .02

 

fuel summary:

the evo will run perfectly fine on 91, 92, or 94 octane gas. at sustained high boost situations the lower octane fuels are more likely to predetinate which will cause the standard ecu to pull some timing.

using 100 octane will not increase the power output of the engine, it will prevent power loss as a result of the ecu pulling timing due to pinging.

 

Yes, this is my basic understanding of how using different octanes works, but there could be more to it, since there have been cases where people gained power just from adding race gas without a change in tuning or boost. You would think that means they were already knocking beforehand, and then the higher octane reduced this knock, thus allowing more power, but there's no specific proof of this. We all know that the stock Evo tune is rich on the top end, so it wouldn't seem to make sense that higher octane would be of any help, since there is no knock to reduce, but what if it helped in other ways? What if the higher octane along with cooler temps caused for leaner AFRs than stock?

The simple fact is that you can't claim a stock time when running race gas. All he needs to do is try it again on 93oct.

 

/\

agreed

 

race gas makes it safer....
what the hell...it isnt a mod

 

12.89 is a pretty damn good time .. Really glad mistu fianlly sent the Evos to the US .. makes me want back one now ..... But i want to hear loud BOV and new evos are a pain to get that dun .. hehe .. guess i will look into gettin a JDM Evo .

Go away Watermellon

 

Also agreed. This would be the easiest and most straight forward way of solving this discussion. That and putting a stock IX on the dyno and dumping some race gas in it, which Im working on.

 

where's the time slip? we need a run on 93 oct, the ecu adjusts for higher octane, we all know that, so this 100octane run is. . . .well, is a 100 octane run. . .hell, I'm sure I could pull 12.89 on 100 octane as well!

 

Betting this is 100 unleaded fuel they used. Not so sure you want to call any unleaded fuel race gas. Sure it has a higher octane rating. But its formulation and density is not that of say C14, C16, Sunoco, Cam2, Turbo Blue, ELF, or Torco race fuels that have 4-5 grams of lead per gallon.
There is 100 unleaded at some of the 76 stations here and in CA. It helps, smells like race gas, cuts down on knock. But doesn't clog up O2 sensors or Cat Converters. Its like saying diet Coke is the same as the real thing.
Somebody will make a 100% all stock pass yet on a IX. With an RS, MR and GSR. Will just take some time.

 

Yes you can Technically the car is stock

However you would say Stock Car on Race Gas

 

Nice times and please re-run using 93 octance to quiet people down.

All I know is that when I use 100 vs 93 octance with no changes the car seems to have more TQ. Was it knocking before I don't know but doubt it.