Quote:
Originally Posted by Turn in Concepts
Nope. Many have gone when completely stock. We know of a few plus there are a few cases on IWSTI that have been documeted as such.
Tony
I find it really odd how the 07 and 08 STI are hit or miss with the notorious ring failure. The 04 – 06 seemed to be stout. As we all know there are hundreds of horror stories about the 07.
But what about the 07’s that have not failed? What about my 07, it can blow tomorrow and it was still a strong car, 36k miles, 5k of which were @ 28psi on the stocker. I had a friend who’s motor failed at 1200 miles. I’ve heard stories of how stock cars that were still in the break in period were failing.
The 08’s received new rings under a new part number. Why at first did they seem strong as ever, now we see failures here and there. The 08 STI I have the most experience with took over 520whp with only 190 miles on the car, completely stock motor.
I work in a manufacturing facility and I know that during the production of parts, there are many different inspection callouts. Some parts are rejected for the way they look or for being just outside of a tolerance. They are sent for rework to cut losses.
If there is an excess of parts, rework is not rushed and parts can sit for awhile. What I’m getting at is, perhaps the stout 07’s were manufactured with 06 components. Perhaps some 08’s were put together with 07 components.
What changed form 06-07,08, the heads, the ECU, and the injectors. Two of the three have a huge bearing, obviously, on how these cars run.
The 07’s hesitated right off of the showroom floor, and ran lean under boost. Off of the showroom floor, I got onto the highway and got into a little competitive driving with a turbo TSX. Had 5 miles on the car at that point, no hesitation at all running through all of the gears, more than once. Where I drove my buddies and it felt like you would go nowhere for a second then accelerate.
Many will say a good tune would save an 07, and I believe this to an extent. But why do some say that a OTS COBB map eliminated hesitation in the 07, while others’ cars failed with the same map.
Other than the lack of fuel “theories” in cylinder 2 and or 4, as well as the timing tables that combine to produce destructive timing values, does any one have other input or comments towards any of this. I continue to push my car everyday, tomorrow its on the DYNO for yet more tuning and R&D. (The objective is a mid-high 11 second stock car) I would like to better understand why some of these cars are indeed failing, while some others are prospering.
-Mike
