Thanks to cambo it looks like we've managed to squeeze out a few more hp and fatten up our torque curve especially below 3500rpm .

The most interesting part was the sheer ability of the n/a 4.2 to spin the tyres between the 1-2 upshift, when you factor in its automatic with heavy 20" rims wearing 295's it surely has some decent power now.

Can't wait to get it back out to the track and post up some results.

 

A tune for a non-supercharged 4.2? Interesting...

 

It's been through a few different stages of tunes with the most resent picking up a lot more torque down nice and low.

I'm looking to get it back to the track to see exactly how much mph we have picked up.

The tune can be load via JLR SDD if your interested pm me

 

This could be the fastest NA 4.2 in the world (said like Jeremy Clarkson)

 

Getting closer to that mid 13s pass with a few more tweaks I just might be there