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XK / XKR ( X150 ) 2006 - 2014

Exhaust upgrade suggestions

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  #41  
Old 04-13-2019, 08:33 PM
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The competition at WSID is brutal there is a stack of cars in the 10s & 11s that appear fairly stock
 
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  #42  
Old 04-14-2019, 03:20 AM
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Originally Posted by steve_k_xk
Alex I'm running 100 cells + X pipe which resonators did you add
Steve I added two straight through round Cherry Bomb resonators
 
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  #43  
Old 04-14-2019, 03:27 AM
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Originally Posted by u102768
Same here. There is no way I could launch as hard as that on our local track. I get a lot less wheel spin on a normal road.
It's funny I'm in the same boat. I test my 0-60 by my house on the street and I'm always faster and can launch harder , isnt that ridiculous? My best run of 12.55 in 1/4 mi on the track here in California where my 0-60 is .25 seconds slower that my best on street at my house. I could easily be at minimum of 12.25 if I could launch the same as on the street , that's just sad..
 
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2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 111.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 Supercharged, (stock with Alpha Jag ECU tune), estimated power: 600+ hp, 7.7sec 1.8th mi/95mph
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  #44  
Old 04-14-2019, 04:22 AM
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Alex, you don’t powerbrake when you launch?
 
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  #45  
Old 04-14-2019, 12:00 PM
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Originally Posted by badicedog
Alex, you don’t powerbrake when you launch?
Lately I have been but judging by 60ft times don't see an improvement over just stepping on gas
 
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  #46  
Old 04-15-2019, 11:24 AM
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Typically if you leave the car at idle when you whack the gas it'll rotate more and load the rear suspension better versus having the suspension already loaded.

Keeps reminding me I need to take the Jag out before it gets too warm.
 
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  #47  
Old 04-15-2019, 02:46 PM
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Originally Posted by Ranchero50
Typically if you leave the car at idle when you whack the gas it'll rotate more and load the rear suspension better versus having the suspension already loaded.....
Also called 'flashing the torque converter'.
 
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  #48  
Old 04-19-2019, 01:13 PM
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I just fabbed up my own duals today. Added two 4” tips to better fill the bumper cutouts (making a large diffuser as well). This car finally sounds the way it should.

 
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  #49  
Old 04-19-2019, 02:14 PM
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Could we get a sound clip?
 
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  #50  
Old 04-19-2019, 08:38 PM
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Originally Posted by makecopies
Could we get a sound clip?
Absolutely!! I’ll post one this weekend.
 
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  #51  
Old 06-20-2019, 01:52 AM
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Woo Hoo... My exhaust gets here this Friday. I'll post some before and after vids...
 
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  #52  
Old 06-22-2019, 05:18 PM
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Stay tuned... it’s going down... lol. Will post vids shortly
 
Last edited by badicedog; 06-22-2019 at 05:54 PM.
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  #53  
Old 06-22-2019, 10:44 PM
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Final inspection..
 
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  #54  
Old 06-22-2019, 10:46 PM
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New Growl for this CAT.
 
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  #55  
Old 06-23-2019, 01:53 AM
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Looking the part sounding the part but can't but help notice that XK badge ruining the rear end of that beautiful car pleasseee delete
 
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  #56  
Old 06-23-2019, 03:31 AM
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I have thought of removing the XK badge....lol
 
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  #57  
Old 06-23-2019, 06:58 AM
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Originally Posted by badicedog
Final inspection..
Was there any special reason or need to leave the center section resonator.
 
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  #58  
Old 06-23-2019, 07:09 AM
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The Larini exhaust is all modular, I can remove it at a later time. My wife primarily drives the car, so I didn't want it obnoxiously loud. I love the tone of it, it doesn't get crazy until wide open throttle.
 
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