Took the 4.0 to TopSpeed Motorsports this afternoon to see what the stock numbers were on it. With 500 miles on the clock I know it is a little early to put the numbers out there but it came back pretty good. 457 rwhp and 325 ft lbs of torque were the peak numbers. Did 4 runs and the last 3 were within 4 rwhp of each other. Will post a chart as soon as I get it emailed to me.

Updated the post a little bit. Now we have the dyno chart that compares a stock 3.8 to the 4.0. Both cars were dynoed on the same dyno on different days but within the same week.

 

Do you have it in SAE? that is in Std.

 

great post. thanks.

 

Thanks LoPro. Hope it helps.

Casey914: Don't have a graph with the SAE numbers. Since both cars were dynoed using the STD correction (a SAE recognized corrections standard) on the same dyno within a couple days of each other this is an apple to apples comparison. If you are looking for the numbers by changing it to SAE correction then take about 3% off the power numbers above.

 

Nice! thanks