biglady112
20+ Year Contributor
- 1,975
- 559
- May 20, 2004
-
Commerce City,
Colorado
We found the limit/weak link of a stock 4G63. It is the pistons. They don't seem to like 61lbs/min. At least not for much more than about 750 miles. I was really suprised the motor last as long as it did at this level. We knew it would go. Just not when or how. This was kinda worse than we thought would happen, but definitely not the way we thought the little motor that could would go.
No hurt feelings over the deal though. The motor did not cost me anything, as it came with the car. Jake gave me a piston and I slapped her back together. It saw somewhere just over 3000 miles with no less than 400whp the entire time. I easily made a seasons worth of pulls on the car. Put it through the kind of punishment a lot of cars won't take. I guesstimate somewhere around 150 full boogie pulls were made with the car since october. Probably more. Went through a lot of 114 octane and like 20 tanks fulls of E85.
The good news is E85 rocks. The motor was spotless when we tore it down today. No carbon anywhere, not even on the combustion side of the head. The tune seemed to be spot on. No indications other than it just seemed to be the #4 pistons time. There were zero detonation marks or pits anywhere. The pistons came from who know where and had who knows how many miles on them. Last time I saw them they were really really grimmy.
So the weak link came to be the pistons in my particular motor. We guess with the E85 and higher boost, she was somewhere near 510-515whp. Not bad for a stock 2G head and stock junked out 6 bolt bottom end. So 61lbs/min and 500whp. She won't last long at those numbers. Just think if I were to have put a great head, cams and intake on there what the carnage would have been. We would like to have said an easy 75+whp was left to be found.
Mods, if this belongs in another subforum, be my guest.
Now onto the carnage.
No hurt feelings over the deal though. The motor did not cost me anything, as it came with the car. Jake gave me a piston and I slapped her back together. It saw somewhere just over 3000 miles with no less than 400whp the entire time. I easily made a seasons worth of pulls on the car. Put it through the kind of punishment a lot of cars won't take. I guesstimate somewhere around 150 full boogie pulls were made with the car since october. Probably more. Went through a lot of 114 octane and like 20 tanks fulls of E85.
The good news is E85 rocks. The motor was spotless when we tore it down today. No carbon anywhere, not even on the combustion side of the head. The tune seemed to be spot on. No indications other than it just seemed to be the #4 pistons time. There were zero detonation marks or pits anywhere. The pistons came from who know where and had who knows how many miles on them. Last time I saw them they were really really grimmy.
So the weak link came to be the pistons in my particular motor. We guess with the E85 and higher boost, she was somewhere near 510-515whp. Not bad for a stock 2G head and stock junked out 6 bolt bottom end. So 61lbs/min and 500whp. She won't last long at those numbers. Just think if I were to have put a great head, cams and intake on there what the carnage would have been. We would like to have said an easy 75+whp was left to be found.
Mods, if this belongs in another subforum, be my guest.
Now onto the carnage.
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