Also be aware that if you do change the rear gear in the STR (or any S Type) you will be thrown in limp home mode immediately. This was done by accident at a Jaguar dealer.

They had to replace a rear end assembly for gear noise or whine. Jaguar changes the entire thing instead of changing bearings or ring and pinion. By accident a 6 cylinder rear end was installed. The smaller engines have a lower rear gear to help get them moving. The car was undrivable. So again until the programming is broken for the STR you can't change rear end gears. And we haven’t even touched on the expense and mods required to fit it in mechanically. So far we have rumors and promises much like the ECM tuners. No real facts.
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Holly Hyundai Batman!

Really? Which model is that? Kimchee R?

Not exactly up their alley though.

Ok I looked it up.

"Then I saw her face, now I'm not a believer". Monkies

 

Yes it really looks like a Mercedes copy to me. But I guess that is a good brand to copy!
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My 2005 STR was an absolute steal when compared even to this pretender.

I'm not sure I'll ever see a deal this good again.

(Boy I sure I don't end up eating those words) LOL

 

Yes, my STR was a great purchase too. So I will have to see what drops the most in price. But so far it looks like the STR will last a long time. Of course I drove my SHO for almost 12 years before upgrading to the STR!!
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Chris, the mods I previously mentioned were both affordable to purchase and install. Compare this to ($35,000 + $2500 tax + $2500 finance charge) of a new muscle car. A 400 hp STR can be procured for $12,000. Add the cost of parts for a basic mod = K&N filter ($44), Mafioso air intake tube ($300), low temp. thermostat ($35), 1.5 lb pulley ($175), pair of hi-flow cats ($160), x-pipe ($80), pair of pre-axle 14"-18" resonators ($60), pair of post axle Borlas ($90), and a pair of 4" stainless steel exhaust tips ($35) = $1000. Most mechanics and custom exhaust shops can do the pulley and exhaust install with both little difficulty and economically. You'll likely gain 40 chp by adding the above. One can still have an LSD with a stock gear ratio. By the way, a stock 400 chp STR could concievably take out the 429 chp Genesis (0-60 in 5.3 sec.) due to both reaching full chp and trq. quicker and lower in the power band, not to forget the STR has 40 lb/ft more trq. (413 lb/ft. vs 370 lb/ft.) Some good STR drivers have done 0-60 in 4.8 sec. with just a K&N a/f and 1.5 pulley (DragTimes.com). Imagine what a 440 chp STR can do to the Genesis? Thanks to the above mods (I used the 3 lb. pulley (15 lbs. boost) which made a huge diference) my STR pulls like you wouldn't believe. Soon to be added are a blower port/polish ($500) and "Chiller Killer" ($600) for an additional est. 25+ chp. If you're looking for the "Best Bang For The Buck"...I hope I made the case for your future in an STR. By the way, go to DragTimes.com and you'll find 4.0 2000 and 2001 XJR's doing mid 12 second 1/4 miles with similar mods.

 

What does your car run in the 1/4 mile?
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tbird, I'd like to know myself at a track in the near future. As for a guess? 12.7 seconds or lower? 0-60 is much quicker compared to stock. On the street and highway it does very well with much of the late model muscle. As anticipated, after 30 minutes the intercoolers are heat soaked, so power drops off. Cold days afford longer peak power periods. Going to love the high O2 cool days ahead. As mentioned earlier, you'll find 4.0 XJR's running mid to high 12's via high boost (15+ lbs.) and ported blowers.

 

I will be watching and hope you pull some good numbers!!
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Good for you but you have a serious car and you know there is no joke when it comes to driving , so please reject the reality and substitute your own
Well, of course that was not I mean , I mean happy safe driving

 

Thanks for the info/advice. In my opinion, my STR is plenty fast and FAAARRRRR more classy than any muscle car or Hyundai!!!I will definitely follow up with your suggestions. I just can't leave well enough alone. What a rush, blowing the doors off a "muscle car" in such an exquisite car. I got to do that yesterday. LOL. I think it was a '04 or '05 Mustang. You guys should have seen his face! LOL. I don't and won't do that often, but it was fun. Anyway, I think I'll start with the air intake/exhaust, then move on to the supercharger. Do you think that's a valid way to start?

 

You're on the right track Chris. I def. understand how you felt after toasting late model Stangs. My cat took out a 2010 Camaro SS (75 to 110) 2003-4? BMW M5 (0-80), Suburu STI (75-100), 2010 Dodge Charger SRT8, etc. Always in light or no traffic. Be cool.

 

bfsgross,
I may have missed it somewhere but I have yet to see a video or credible time slip of an Jag STR in the 12s. I'd be both happy and amazed if you ran a 12.7 or faster. Wishing you the best and wondering if you actually have done so.

I am heading to a track in southern MD tomorrow.
..:: Maryland Int'l Raceway* -* Budds Creek, MD* ::..

Weather will be good (not ideal) after 8 pm as I try for an et of 13.0 seconds. The temp will be below 60 F but the humidity may keep me from a new personal record since it will be 70-80%.
Mechanicsville Hourly Weather - AccuWeather Forecast for MD 20659

This will likely be one of my last trips to the tack before installing the ~3lb sc pulley.

 

StypeRacer, I understand your ambivalence to my guessing my 03 STR can do high 12 seconds in the 1/4. To be clear; I wasn't making a claim but rather guessing. One of our own Georgia based 05 STR forum members popped off an official 12.8 with: K&N drop in a/f, low temp thermo, Mafioso air intake tube, 3 lb. pulley, hi-flow cats, x-pipe, dumping out of Borla's, runnin slicks, and an unwelcome 80 degree outside temp. I mentioned official mid to low 12 second 1/4's performed by 2000 and 2001 4.0 s/c XJR's at DragTime.com, not the more powerful 4.2 s/c STR's. The XJR's had ported s/c, and smaller blower pulleys. A 2000 XJR did a 12.4 1/4 with blower porting, pulley, and low gears. The best official time slip for an STR (DragTimes.com) was 13.1 seconds, performed only with the aid of a K&N drop in a/f and a 1.5 pulley on a cool night (57 degrees). I understand you're going to pop on the 3 lb. pulley? No Mafioso air intake tube? Dude, you're missing out on much improved air velocities. No thermostat? You must provide the ECU's desire for "some" heat build-up so it can perform stoichiometry. How can it do this with out enough thermodynamic heat in the cumbustion chambers? Install Eurotoy low temp. thermo. Do the 3 lb pulley, Mafioso air intake tube, and low temp. thermostat. After the install perform a hard re-set to purge adaptive learning from the "Sport" mode. Drive her for 100 miles normal in "Normal" trans. mode, then animalistically in "Sport" mode. Report back to us on how your STR is now an animal and could do a 12 second 1/4. This a.m. with 40 degrees F. my STR ate up the road almost too fast. It truelly was scary...The otherwise normally adaptable corners came on too quickly. You'll def. desire a "Chiller Killer" after 30 minutes of this. A s/c porting will def. give her 25+ hp and trq.