Turbo Dynamics Tunes

[Nortrider]

Heres another fact: You're treading through the woods and you come across a doe like the one in Clutchmaster's Avatar ...... who cares about octane!!!

Pussycat the octane looks plentiful over there!!

 

[Fleecer]

Octane......
Lots of things determine what your gonna need to prevent deto. There’s not a lot you can do to change your engines requirements without tearing it down, but there is something I feel is really overlooked here.
My experience with smaller turbos and higher boost pressures has been once you get into the inefficient area of the compressor map the turbo really starts to heat the air quickly.
Hot intake temps have a HUGE impact on knock.
The guys running a stock frame turbo on a Mitsubishi Evo (me at one point) found this to be true. Once boost pressure was over 20 psi with a smaller sized intercooler there was nothing left to be had. BUT if you put a really big intercooler on it, dropping the iats down we were able to run 26~28 psi on pump gas.
Another example is E85. It’s only 105 octane but many will tell you it’s more resistant to detonation than 112~114 octane gasoline. I know this is true. The reason being is E85 has four times the latent heat of vaporization. That means when it evaporates it pulls heat out of the surrounding air to do so, cooling it. Put some rubbing alcohol on your finger, you’ll see what I mean.
What I’m getting at is the addition of a larger intercooler and more airflow is a recipe for big reliable power, especially with the smaller turbo. Cold air intake helps too. Also colder air is more dense and will always make more power at identical boost levels, given the afr’s stay the same. Maximum power for gasoline is 13:1 afr, if your not getting any deto, then 12.5 is probably where you want to be with a bit of a safety margin.
Whatever you can do to increase airflow over your IC is great!

Should i drill hole in hood and run external cai?

 

[Turboflash]

Should i drill hole in hood and run external cai?

Run something like this if you want real CAI. The under-hood ones are all WAI (warm-air intake).
There is a pre-filter over this to keep snow dust out.

 

[ClutchMaster]

Should i drill hole in hood and run external cai?

Yes absolutely! If your running slightly lean, you can bump your fuel pressure up a few pounds.