Hi everyone, I've been told an interesting thing this weekend. Met an owner of the 2008 GC SRT8 model and he told me that he bought it US and wants to change his PCM to an european one. He argued that US emmision policies make the DC set their PCM lowering their power a little. As he claimed that european models go 4.8 0-100 km/h on stock, while US make 5.2.

Did anyone hear something like that?

Best was 4.6 with stock (Dashhawk) - but typically 4.8 would be about right.

But what do you think regarding the PCM defferences? Is it possible?

But what do you think regarding the PCM defferences? Is it possible?

There are differences, like readouts in metric etc but as far as the base calibration unless your fuel is a different octaine I would say the performance should be the same as the rest of the world.
There are three Jeep PCM SRT calibrations per model year, US, Europe, and Japan.


Jeff

There are differences, like readouts in metric etc but as far as the base calibration unless your fuel is a different octaine I would say the performance should be the same as the rest of the world.
There are three Jeep PCM SRT calibrations per model year, US, Europe, and Japan.


Jeff

Our fuel here is a different octane. We get a choice of 95 or 91. That's the main reason I haven't gotten the Diablo. I want a real tune with the fuel I use!

Ever since I had the shift TSB applied I haven't seen better than 4.8 on the dashawk.

http://bukerworld.com/tmp/drivingskid.gif

98 octane here...oh yeah!!

Going to get a nice tune on the RR soon.

Interesting.... more details would be good to know.

Huge difference!

Like below.......

http://i77.photobucket.com/albums/j72/Paulie23/Steven-Seagal-Emotion.jpg

in time predator support 2008 JGC SRT8 i am planning toget a nice tune, and i learned there are 91octane tune, 93octane tune and some said there is a 95octane tune.

in U.A.E. we have 95octane and 97octane.
i read on diff thread that diff octane are measured diffrently in somepart of the world, like
U.A.E. 95octane is = U.S.A. 91octane,
U.A.E. 97octane is = U.S.A. 93octane,
which i dont get it?
if some1 can chaime in with a very detailed feedback on how thats is true i will be so thankful as i was saying i am getting a cmr tune and i want to know what is the prefered octane tune 4 my SRT8, thanx

in time predator support 2008 JGC SRT8 i am planning toget a nice tune, and i learned there are 91octane tune, 93octane tune and some said there is a 95octane tune.

in U.A.E. we have 95octane and 97octane.
i read on diff thread that diff octane are measured diffrently in somepart of the world, like
U.A.E. 95octane is = U.S.A. 91octane,
U.A.E. 97octane is = U.S.A. 93octane,
which i dont get it?
if some1 can chaime in with a very detailed feedback on how thats is true i will be so thankful as i was saying i am getting a cmr tune and i want to know what is the prefered octane tune 4 my SRT8, thanx

wrong .

Definition of octane rating

The octane rating of a spark ignition engine fuel is the knock resistance (anti-knock rating) compared to a mixture of iso-octane (2,2,4-trimethylpentane, an isomer of octane) and n-heptane. By definition, iso-octane is assigned an octane rating of 100 and heptane is assigned an octane rating of zero. An 87-octane gasoline, for example, possesses the same anti-knock rating of a mixture of 87% (by volume) iso-octane and 13% (by volume) n-heptane. This does not mean, however, that the gasoline actually contains these hydrocarbons in these proportions. It simply means that it has the same autoignition resistance as the described mixture.

A high tendency to autoignite, or low octane rating, is undesirable in a spark ignition

It should be noted that octane rating does not relate to the energy content of the fuel (see heating value), nor the speed at which the flame initiated by the spark plug propagates across the cylinder. It is only a measure of the fuel's resistance to autoignition. It is for this reason that one highly branched form, or isomer, of octane (2,2,4-trimethylpentane) has (by definition) an octane rating of 100, whereas n-octane (see octane), which has a linear arrangement of the 8 carbon atoms, has an octane rating of -10, even though the two fuels have exactly the same chemical formula and virtually identical heating values and flame speeds.

Wikipedia (2008) Octane rating. http://en.wikipedia.org/wiki/Octane_rating

http://bukerworld.com/tmp/drivingskid.gif

wrong .

whats wrong?
and then..... whats right then? :)

Definition of octane rating

The octane rating of a spark ignition engine fuel is the knock resistance (anti-knock rating) compared to a mixture of iso-octane (2,2,4-trimethylpentane, an isomer of octane) and n-heptane. By definition, iso-octane is assigned an octane rating of 100 and heptane is assigned an octane rating of zero. An 87-octane gasoline, for example, possesses the same anti-knock rating of a mixture of 87% (by volume) iso-octane and 13% (by volume) n-heptane. This does not mean, however, that the gasoline actually contains these hydrocarbons in these proportions. It simply means that it has the same autoignition resistance as the described mixture.

A high tendency to autoignite, or low octane rating, is undesirable in a spark ignition

It should be noted that octane rating does not relate to the energy content of the fuel (see heating value), nor the speed at which the flame initiated by the spark plug propagates across the cylinder. It is only a measure of the fuel's resistance to autoignition. It is for this reason that one highly branched form, or isomer, of octane (2,2,4-trimethylpentane) has (by definition) an octane rating of 100, whereas n-octane (see octane), which has a linear arrangement of the 8 carbon atoms, has an octane rating of -10, even though the two fuels have exactly the same chemical formula and virtually identical heating values and flame speeds.

Wikipedia (2008) Octane rating. http://en.wikipedia.org/wiki/Octane_rating

http://bukerworld.com/tmp/drivingskid.gif

thank you so much sir :)

i did also more seaches on this topic i came across this:
if you live in the uae then read this Adnoc artical, very useful :)
ADNOC FAQ (http://www.adnoc-dist.ae/eplus/FAQ.aspx) and E-PLUS (http://www.adnoc-dist.ae/eplus/CarList.aspx?BrandId=119)

another helpful page (http://en.wikipedia.org/wiki/Octane_rating)


so now i know that in U.A.E. we use MON 95 and 97
and that equals to U.A.S. RON 91 and 93

and its adviced that srt8 in U.A.E. uses 98 octane (MON) which also equals to 93 U.S.A. octane (RON).

so i blv the predator 93Octane tune is perfect for ppl in U.A.E. that are using 97 Octane (MON)

this piece of info was so valuable to me, i thought of sharing with ppl who are interested :)