Here is a snapshot of a current dyno run with 14 pounds
of boost and a 75 HP Nitrous shot. The two columns on the right of the chart show a
compensated HP/Torque rating. The compensation is shown for two reasons.
Lotus engineering indicated that since the dyno runs show 'rear wheel horsepower' there is
approximately a 15% lower reading of actual 'engine horsepower' and torque due to the
power consumed to turn the drive train. Also, Lotus Engineering indicated that the
rear wheel HP/Torque would be further diminished due to the much wider, therefore heavier,
rear wheel/tire combination I have installed. They estimate that this would show an
18% reduction in rear wheel HP/Torque combined with the drivetrain loss. The current
engine rebuild from In Tune combined with the inter-cooler setup from Swede Speed and
Hyper Sports, custom chip from PUK, and of course the NOS make a 207 HP improvement from
stock at 15% compensation and 227 at 18%. Since this dyno run we have greatly
improved the efficiency of the intercoolers so these numbers are going to show a little on
the low side. I can't wait to find our how much!
UPDATE!! The new intercooler was
tested and makes a net 17 HP difference at the rear wheels at 12 pounds of boost. It
also maintains a 94 degree air inlet temperature at 14 pounds of boost.
NOTE*** On the dyno chart below the 2
lines represent Torque and Horsepower. They read from left to right scaled on RPM.
The upper line at the beginning represents torque. Maximum torque was 439.6
right around 3700 RPM. As you can see the horsepower was climbing all the way to
throttle liftoff at 7400 RPM to end up at 473.4.
| Boost Level PSI | Nitrous ON/OFF | Rear Wheel HP | Torque | Actual Engine HP/TQ 15% Drive Train Compensation | Actual Engine HP/TQ 18% Drive Train Compensation |
| 14 | ON | 473.4 | 439.6 | 557/517 | 577/536 |