hi all, 1st time at track last night
1st run was 12.8 @ 113 - sport mode / dynamic mode / auto / trac dsc - slight power brake and matted it
best run of 5 of 12.765 @ 110 - sport mode / dynamic mode / auto / dsc off - slight power brake and matted it

car is 2010 XF supercharged with 470hp factory (accurate?).
I've opened up the exhaust with electric cutouts and added the MINA intake.
otherwise all stock
tire are continental contisport. i think they are over 500 tread wear rating

anyone have experience with adding drag radials and is it worth a few 10ths?

 

You need a tune if you want to go fast with that car. Easy horsepower.

 

What he said, also remember the Jags diff is not ideal for sticky tire, hard drag launches. Too much tire grip and somthings gonna go boom in your drive train.

 

I know this from experience.

 

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thanks guys! yeah my last run was dsc all the way off and i ended up with some pretty severe wheel hop through 1st gear. i never lifted, but thought about it and got nervous after the run.. don't want to be doing that too much..

yes, headed it the tuning direction, just was wondering about improved launches. I've read a number of posts on this forum. all very helpful, but some lead me to more questions than when i started.

i didn't really want to go in the direction of extra wheel / tire sets - because of cost / pain in the butt factors.. happy to stick with 1.9 - 2.0 second 60' times if it means nothing breaks on the car!!

tuning is my focus now, but there seem to be 4 or 5 main companies. some make me more nervous than others. i'd been focused on ECUTG because they claim the highest power. (Jags emailed me that they can do 618hp) but they are frustratingly lacking in details. i believe the expectation is to trust them, which I'm not fully ready for without more info.

so there are eurotune and velocity AP and ... and ... and ...

i've seen some wild performance claims and some fairly mild reported numbers - wanting to arrive at a reliable truth in the middle..

velocity AP got back to me relatively quickly and they seem to indicate that 600hp isn't realistic with the older Denso management system, but is able to be done with the newer Bosch systems. so it seems they can go about 540 hp per a gent on here (Tom i think) and his dyno's info. i like that they don't tell me a HP figure that sounds good on paper only.

further questions of if i should do lower and upper pulley first, or just upper.. seems the roots supercharger starts to just make heat and become less efficient with more boost, but i've got no experience personally with this.

i see you two gents use a different company - jailbrake? would you use them again and why? many thanks in advance for your perspectives on these issues.

 

mind sharing what broke? and cost to remedy?

 

Sheared a half shaft. Would have been $1,800 if I didn't have a warranty and a good service writer.

The extra for the tow $300 and spending all day in a tow truck was insult to injury.

 

I would use Jailbreak (GSR Technik now) again. But I am local. Would have been nice to get a handheld programmer though. I would do the tune first then decide if you still want more. Then do upper pulley, then lower or water/meth injection.

 

First off me and Kyanite are pretty much brothers from another mother, that said I followed his lead and reasoning with Jailbreak tuning. I'd go a little different in mod application though, I'd do exhaust X first then upper pulley and tune as one and stop there. As you were told the ECM is the main limiting factor in power above 550hp so any claims of more hp than that from a tuner without a dyno sheet is probably false.
You roll on yours after a pulley and tune, in real world driving like a freeway merge belive me YOU WILL BE VERY HAPPY!

 

thanks gents!!

 

12.8 seems very high. try some VHT on your tires to make them a bit stickier.
okay, so tougher half shafts can be made at many places.

upper pulley first, the lower pulley I am not a 100% about. Heat will become an issue as you spin the blower more but you can band aid this by increasing through put of the intercooler (more powerful pump) or adding cooling capacity (adding another heatsink/radiator, or adding water wetter to the mix)

I am curious to know why the ecu is a limiting factor in the HP numbers. The tables that are used do not require all that much calculating power and you are not adding any more signal processing.

the electric cut outs can rob you of some torque off the line, but give you some horsepower on the top end. Open them up after you launch.

 

From what I understand it's not the calculating power of the ECM, it's the amount of variation (adjust ability) the tables will hold.

 

And remember this is a supercharged not an XFR. So the time doesn't seem as suspect to me.

 

1.9 t0 2.0 zero to 60..................not even a tune will get you that......id guess 3.6 to 3.9 at the very best

 

60 feet and 60 miles per hour are not the same thing, Inky.

 

right, he would need the tune and pulley combo to match the xfr/xfr-s

 

haha ,,, that dawned on me on my way home...... im like chit... he was talking 60 foot not 0-60..... i watch enough street outlaws i should have picked up on that ; )

 

well I "could" get him a 1.9 0-60 but the I would have to mount his car on a rail gun, or a steam cannon.

 

1.9.......chevy corvette lingenfelter .... so just ad a bow tie