Run that tank of gas through and get the highest octane rating you can (91 is the highest there?) from a station that you know to have quality gas.

Then dyno in 5th gear.

I recently filled up with nonamebrand 91 octane from a grocery store to use up our 'gas reward points' :ugh2: Bad idea. My car bogged down off the line and just generally felt unhealthy until I diluted the tank with some 93 octane.

I would go get it dynoed by another company just Because. Yea I would be very upset to you should be making 320 wrhp at least. Something has to be wrong. But next step I would do if I were you is get a tune.

thats why i got so disappointed, but i will do that, get it dynoed at some other place as well as put fuel from a cleaner station before i get it tuned.

1) Drag strip will tell you nothing of power, if i can race a WRX with 300WHP and make the same MPH at the end of the quarter when i'm in a stock 2001 mustang, what does that tell you?

It's all driver and grip levels, remember the stang is RWD and the WRX is AWD.

2) Don't expect much from bolt ons with recent/modern cars, they work their way around the parts as best they can, the tune is what allows them to work.

Get it tuned, you can't whine until then.

i understand that is correct, i will get it tuned next but still expected better numbers at least 290 pre tuned

what is the highest grade of fuel available in your country?

They claim it's 91, but everyone says it's far less than 91 perhaps close to 89

You have to understand that the ECU will not change like the OBDI systems did, so you can't get that kind of increase pre tune. OBDII was brought in to be stricter and make the engine try and get back to the factory state. I understand that these newer versions of OBDII are even more so this way, very hard to change the overall running.

OBDI only adapted to the situation, so an easier breathing filter, it would put in more fuel for example.

ODBII, would see the easier breathing, but try and tune it's self in order that it didn't put more fuel through than it's original design was told.


Basically, you're expecting too much, it won't happen, the tunes are needed these days more than ever because they change the mind of the ECU as to what they should be doing.

I don't think you're expecting too much. +8 hp gain pretune is not normal for the mods you have. I think the problem is the dyno and/or engine.

I think its the dyno I will have it dynoed in an hours time and have numbers posted

im surprised no one has said this yet...you're in essentially saudi arabia am i right? your temperatures will play a HUGE role. as well as the octane standards. as far as i know, saudia arabia, and most of the world uses a "RON" (research octane number) octane rating. the USA on the other hand uses an "AKI" (anti knock index).

a quick google search turns up our 91 in the USA is equivalent to the posted "95" octane in the rest of the world. which could very well explain your power differences. as well as the low humidity/high heat in that part of the region. but back to the octane ratings, it seems you're essentially putting in what us americans know as "87" into your Z. hence the lowered power ratings.

edit: wikipedia'd it:

Chops couldn't of said it any better, I had in mind the lower gains were due to the lower fuel rating in Bahrain but with regards o the weather it is good this tine of year and that's why I opted to get it dynoed.

On a brighter note I got the car dynoed on a different dyno tonight and got more realistic numbers, this is of course pre tuned numbers, I'm hoping to get around 300 hp tuned, the numbers that I got are as follows 286 hp and 251tq, so I am a bit happier now, I'm hoping for around 300 tuned, do you guys think I van achieve that or am I expecting too much? What do you guys think is a realistic number for me after tune, and instalation of jun cams, dare I say 320hp ?

Not to hi-jack but I love Bahrain... Just sayin!

Heading that way in a month or so. Gold souq here I come!

lp

Loool your more than welcome, u coming over for the F1 race?

make sure to run it empty on the 91. get some 95 in there!!