Which octane the TRD Supercharger requires?

 

I would guess 91/93/94

But you never know... every SC car I've driven required 91+.. well.. 89+

 

115 octane, leaded aircraft fuel. j/k

It's too early to tell but it's most likely premium.

 

The other kits from TRD that I have looked into(like for the 3.4) require 91.

 

Do we have an estimate about gas mileage for this thing yet... I have a feeling its going to get gas mileage like a truck.

 

I've had chipped audis and every german tech has told me that even with 2 turbos it will run fine with 87.... ( I still put 91 and 93 in warm weather hehe)

in the winter or colder weather you don't want to put higher octane in your car. It will make it stutter like crap and you will burn through your gas faster then a fart vapor.... really crappy gas mileage.

In colder weather 87 is the way to go regardless of a SC or turbo... This is from experience... Audis are fussy and I got no knocking or CEL for doing so.

 

Not sure why you had those issues... because octane has absolutely nothing to do with them. Running high octane in the winter has no effects different than in the summer. The octane portion (the percent, such as 91) can withstand higher compression and temps before it combusts.... that is the ONLY thing different about it. The rest of the fuel is Heptane, which ignites easier (which can cause pre-ignintion)I have run high octane in EVERY car I have ever owned, other than to test the effects of lower octane. I have consistently seen very slight improvements in mileage with higher octane regardless of climate. I have run it in 70s fords, chevys and toyotas, 80s chevys and fords, 90s saturns and toyotas, and newer toyotas and the scion.

 

you obviously never had a 2.7 biturbo audi. I am talking turbo language not NA engine abilities. A 'cleaner' fuel of a higher octane most certainly effects a biturbo engine in colder temps. lower temps = crappy combustion the exact opposite of why diesel needs to be warmed up from jelling, 91+ octane combusts like flash paper in colder weather on a turboed car at start up. I am only talking about start up. Sorry for not being more specific.

I think any car with 91+octane gets lower gas mileage in cold seasons.

You said it yourself. ''The octane portion (the percent, such as 91) can withstand higher compression and temps before it combusts....''

testing mileage vs. octane is a joke. Factors for mileage all depends on your driving style and where you are going i.e. highway/city destinations, speed, how much stopping/braking you have to do, if it's a windy day in your favor or against, you have proper tire pressure, how much weight is in the car, going up hill or down, how far along before/after your oil change, etc. etc.....

 

im guessing the car will run 89 +
but youll get more boost from the car with 91.92 octane
the owners manual of the srt4 suggest putting in premium,[91+], however you can put in lower octane gas and it will run, but you will lose boost dramatically. im going to say 91+ at least on the SC tC

 

I bet they will reccommend 91 tops. If the kit doesnt come with an intercooler, we could probably add on one, which would probably allow us to run either 87 or 89.

 

Hate to get into this argument.... but higher octane gas in in no way cleaner!!! Ocatne rating has nothing to do with detergent content, only the resistence to pre-ignition. And the "flash paper" effect actually benefits mileage. You are pumping the same amount of fuel per stroke regardless of fuel type. A fuel which burns more rapidly utilizes its potential energy more efficiently in the application of an internal combustion engine. The effect is very small, but does not degrade mileage. Not sure why you were having problems with the audi (except that early model audis were notorius for having problems, if it was an early model).

And the use of a supercharger or turbo in many cases warrants higher octane fuel, since you are raising the pressure in the cylinder. And higher octane fuel does not combust easier in the cold... it is the opposite. The fuel only seems to burn like flash paper because it has to be compressed and heated further to burn... meaning it will not begin burning before plug fires... so you get all of your energy right when you need it... when ignition occurs.

 

wow, you guys sure know what your talking about. I'm thinking that this is a Toyota and that they are going to make it as idiot proof as possible, for people like me.

 

i'm sure toyota will set the ECU to be able to handle the SC and the gas will undoubtably be 89+ octane [recommended]