VMax Motorsports JaguarForums.com Initial Tuning Sale
#41
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Sorry: Valve Job. That's the sign of a good cylinder head. Typically ~30% of the gains from a modern ported head come from the VJ. When you get into the 60-70% range the cost per HP ratio dips significantly and gains shrink. Of all power adders positive displacement superchargers care the least about head flow and velocity. On a 800HP car with a great port/VJ you may gain 10-15HP to the tires. Definitely not worth the money.
The full bolt-on package should belt out 770-800HP, adding a 100 shot (rated at the crank) would make for 900HP and around 175-200lb/ft of torque (extra torque due to the cooling effect nitrous has on the hot compressed air coming out of the supercharger). Since you are AWD I would assume you would break something sooner than later due to the insane torque. From my experience and that I've gleaned from others running serious HP (2000-3500HP) stick to a single power adder (FI in this case) meaning a larger supercharger head unit. Lots of custom fab work and no one to share the tab with, is the only down side.
The full bolt-on package should belt out 770-800HP, adding a 100 shot (rated at the crank) would make for 900HP and around 175-200lb/ft of torque (extra torque due to the cooling effect nitrous has on the hot compressed air coming out of the supercharger). Since you are AWD I would assume you would break something sooner than later due to the insane torque. From my experience and that I've gleaned from others running serious HP (2000-3500HP) stick to a single power adder (FI in this case) meaning a larger supercharger head unit. Lots of custom fab work and no one to share the tab with, is the only down side.
#42
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Don't forget half shafts. I've heard of someone shearing one with a tuned XFR. That was at the drag strip and not running drag radials. So be careful.
Last edited by 2010 Kyanite XFR; 12-27-2015 at 02:22 AM.
#43
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#45
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