Quote:
Originally Posted by Andy804
I have the following numbers for my 1998 2.5L Boxster that is for all intents and purposes a spec Boxster race car (no engine modifications). Would appreciate any insights as to the meaning of these numbers. I have a suspicion that the engine is not exactly healthy. But would it affect how well the car accelerates? Car was dyno'd with 2 runs at 178.74 and a run at 180.58 but with stock exhaust so horsepower numbers might actually be within range of other spec Boxsters if it had a full race exhaust set up.
Compression Test in psi
1. 135
2. 130
3. 145
4. 145
5. 140
6. 130
Leak Down Test
1. 8% past rings
2. 9% past rings and intake
3. 5% past rings
4. 5% past rings
5. 5% past rings
6. 9% past rings and intake
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Several of the leak down numbers are approaching the upper limit, suggesting that you may need to plan for a rebuild.
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