1998 Ford Escort 2.0L SPI Tests
These were the test runs of one of our cars over a period of over 3 years of tinkering. The 50 lbs of insulation was added to make the interior more quiet, plus the driver in these test is over 270lbs. That's one reason the times are a bit slow. A bone stock (except for the silencer removed from the bottom of the air box and a performance air filter) 1991 SEFI car with an automatic ran 17.68 at 77 mph. This car at the time had well over 100,000 miles on it and was rated at only 88hp. Makes you wonder about the 110 horse rating of the stock 1998 SPI?
The car below has had a lot of fine tuning and de-bugging to run this well. Sometimes modifications that should work well don't. Then you have to figure out why. The main reason is the computer and sensors aren't giving the engine what it wants to make power. Sometimes, the sensors can be tricked to fool the computer and gain some performance, but in the end, an add-on chip is necessary to extract the most power and driveability from the engine.
The stock throttle body only opened a little over 3/4 of the way open. Then it was also offset with the opening in the intake manifold. Also, the stock transmission shifts extremely slow, especially from 1st to second. It shifts at about 4200 rpm instead of 5500 like it should for the powerband of the stock engine. It is next to impossible to hold it back in 1st gear.
The cam picked up a lot of power. If you put it in a stock engine, the gains would be a lot less. In this case, the rest of the engine was capable of flowing a lot of air and the stock cam was a major restriction holding it back, therfore, a larger gain was seen.
This particular car is still a daily driver and is usually driven by the wife. It was never intended on being any kind of race car. It gets better mileage than when it was stock, idles smooth, is quiet, and runs like a scalded dog when you put your foot down. The car doesn't get off the line very well with the best 60 foot time being a 2.19. It usually doesn't hookup that well with times in the 2.40 - 2.60 range.
Higher compression, a more radical cam, a racing torque converter, a locking differential, a lower final drive ratio, and slicks would easily drop time times into the mid to upper 13 second range but the driveability would go away and the wife would want a new car.
This car is no longer with us as it was involved in an accident.
Performance Tests - 1998 Escort 2.0 SPI / Automatic