Skeeter

Hadn't been in the beast for a while, been busy making ugly commutes that i wouldn't subject her to. Usually after a two week break, the car feels CRAZY fast. Mind you the contrast is with my commuter lane beater, a CNG powered Crown Victoria, so you'd expect to be blown away getting back in the torquemonster.

But it almost feels the way it did when the S/C pump was failing. Could all be in my head, traffic hadn't allowed enough open road. So yesterday I fired up Dynolicious on my iPhone, went to a remote frontage road and did some 0-60 focused runs (from a dig) to get some objective data.

I was running a full tank and loaded trunk, and the road was pretty bad (rutted, rough, an occasional patch of loose gravel). I felt weak on launch, trouble controlling wheel spin. Nevertheless, I turned consistent 4.5-4.7 0-60 times.

Should I be disappointed? With Renntech pulley and ECM, fresh PS2's, should I be in the low 4's instead? Or is this good for a sub-par road and a half-dozen runs under 4.7 (despite heat soak). I dare not run the 1/4 on this road. Not enough room, not safe enough.

Cop paranoia kept me from really dialing things in, messing with settings, shutting off T/C, etc. I wanted to make a half dozen runs and leave the rarely traveled road with no intersections asap.

Let me know if I need to get her back on the Dyno and look into more mods (TCU/Cooling/etc), or if I'm where I ought to be all told.

Sorry for the long rant!

Skeeter

Ali_E55

i feel my car has the same issue. even an E63 beated me in a race. couple of times ><

i feel there is something wrong with my car

my freind has an E55 stocke but removed the primeris and resonators. and he is next to me >< from nill to 220km @@

Skeeter

Ali,

Have you used a Gtech similar performance meter, or better still gone to the track since you felt this decrease? Have you had your S/C pump replaced? If not that's a first step and primary culprit.

But what is normal 0-60 time for real world conditions, less than optimal, on a 85 degree day?

Thanks,

Skeeter

Ali_E55

I replaced the pump to the new onw, the S/C doesn't shut off

I know how it feels because I had it before

But even after tuning, I don't feel it is a WOW tuning

All checkings are good

Did my last service and there is no problem showing

How can I test my s/c pressure ?

Should I return it back to the tuner !


I can't imagne an E63 beating me while my car is tunned

jmf003

A bad road surface can easily cost you half a second. High 4s sounds about right given your description of the road.

DFW01E55

Summer air combined with a summer blend gas and power goes down.
Maybe you don't get the summer blend gas but we do in Dallas.

CWW

+1

It's summer. Supercharged cars are slow dogs when it's 90+ degrees out. No way around it. You guys will get your beasts back in September.

cahiil55k

Don't let those 0-60 times get you too worked up. There's too many factors involved with high torque, non-AWD cars. I've run a best 4.5 seconds stock (easing onto throttle), and a worst in 6.6 (mashing throttle w/ESP on) just minutes apart. Even with only the stock amount of torque, traction will always be an issue. A better test would be something like a 30-100mph run but being near Berkeley myself I don't think there's many roads where you can try that.

shardul

iTrader: (1)

Ali_e55 you can measure your boost via an obdii scanner and look for the MAP reading. You may have to convert it into psi.

CCW you are right about s/c cars feeling slow in this heat. These days I don't even get on the gas due to ambient temps being in the 90 to 100.
After iats hit 140 timing is pulled by 9 degrees every degree pull in timing represents a 8-9 hp in lost power.

Ali_E55

well to be honest .. the temp was 35C when i raced. >< and that was @ 11:00pm

u know how it is middle east

so do u say it is because of the heat ?!

could it be that dealer reflashed my ECU !!

ENTIZY1

the heat is def going to affect it, but then again the iphone is not super accurate

shardul

iTrader: (1)

to see if the dealer has re flashed your ecu, hook the car up to STAR and look at the ecu re flash table, it will tell you if and when the ecu was altered.