- Joined
- May 26, 2001
After 25+ years of tuning, building and modifying 1000's of GN's and TR's, it was very surprising and gratifying with our results of a dyno test on a customer's stock engine GN yesterday!
The weather was excellent in the 60's with a little humidity at ~ 30% here in the desert, and at our elevation HP results are normally 10% less than sea level.
The car has just over 100K and has a stock turbo which was replaced under warranty years ago, and the engine has only had the timing chain and valve springs replaced, and the intercooler is stock.
This car has been 116 MPH at the local drag strip, and went 134 MPH all out on the Utah salt flats!
With this groundwork being laid, the owner wanted to step up his performance, and still meet the criteria of a stock class car.
Since we were limited in engine mods and bolt-ons, we had to turn to tuning for extracting more HP, and be reliable especially at WOT for 3 miles or more.
It was absolutely necessary for us to have ample data available so a Powerlogger was mandatory.
After further discussion, a SD2 chip was also required as it would also provide the needed control and adjustment for reliable, long term high performance.
After a few days of garage and street tuning, and excellent support from Eric, the car was ready to show what it had for us!
At the dyno, the owner wanted a baseline of his stock chip and computer, as well as the optimum HP in the best configuration.
With a stock computer and a chip from one of the most renowned TR sources, we were pleasantly surprised when it pulled 378 HP.
We then installed the PL and SD2 chip, and the HP was at 406 HP, at 28 HP increase with the better tune and control of the SD2 chip!
We then took it to our final level and removed the stock MAF which is not needed when using the SD2 chip, we then found 8 HP for a total of 414 HP, a 36 HP increase over the chip!
After having installed many Powerloggers, and only a couple SD2 chips, this proves how important the tune is for power and reliability, this is by far the best alternative for the overall cost.
One caveat when working with the SD2 chip for the novice tuner [like me!], be sure you understand the process as you go, or find an experienced tuner [like I did!] before you push the limit.
Another point here is one that has been stressed over the many years, and that is "combination", which the most important factor to follow once you have established your performance goals.
The weather was excellent in the 60's with a little humidity at ~ 30% here in the desert, and at our elevation HP results are normally 10% less than sea level.
The car has just over 100K and has a stock turbo which was replaced under warranty years ago, and the engine has only had the timing chain and valve springs replaced, and the intercooler is stock.
This car has been 116 MPH at the local drag strip, and went 134 MPH all out on the Utah salt flats!
With this groundwork being laid, the owner wanted to step up his performance, and still meet the criteria of a stock class car.
Since we were limited in engine mods and bolt-ons, we had to turn to tuning for extracting more HP, and be reliable especially at WOT for 3 miles or more.
It was absolutely necessary for us to have ample data available so a Powerlogger was mandatory.
After further discussion, a SD2 chip was also required as it would also provide the needed control and adjustment for reliable, long term high performance.
After a few days of garage and street tuning, and excellent support from Eric, the car was ready to show what it had for us!
At the dyno, the owner wanted a baseline of his stock chip and computer, as well as the optimum HP in the best configuration.
With a stock computer and a chip from one of the most renowned TR sources, we were pleasantly surprised when it pulled 378 HP.
We then installed the PL and SD2 chip, and the HP was at 406 HP, at 28 HP increase with the better tune and control of the SD2 chip!
We then took it to our final level and removed the stock MAF which is not needed when using the SD2 chip, we then found 8 HP for a total of 414 HP, a 36 HP increase over the chip!
After having installed many Powerloggers, and only a couple SD2 chips, this proves how important the tune is for power and reliability, this is by far the best alternative for the overall cost.
One caveat when working with the SD2 chip for the novice tuner [like me!], be sure you understand the process as you go, or find an experienced tuner [like I did!] before you push the limit.
Another point here is one that has been stressed over the many years, and that is "combination", which the most important factor to follow once you have established your performance goals.
