100,000 miles - finally!
Discussion
EvoOlli said:
rfisher said:
How does a bit of the cat get sucked into the engine and why isn't that covered by Power's warranty?
High overlap of valves and an (abrupt) release of the throttle at higher RPMs -> Underpressure in the exhaust...if the cats were damaged before by excessive fuel / rich mixture it can suck in parts of the ceramic cat. Why should a warranty on the engine cover such failure ?
Who's to say that the cat didn't destruct as a result of the not inconsiderable forces sucking down the exhaust while the engine blew itself up?
I've not heard of m(any) Sp6 engines sucking bits of their cats into the engine.
Is this a common event?
Should all Sp6 owners have the cats replaced after a certain time?
Edited by rfisher on Tuesday 11th February 17:45
rfisher said:
EvoOlli said:
rfisher said:
How does a bit of the cat get sucked into the engine and why isn't that covered by Power's warranty?
High overlap of valves and an (abrupt) release of the throttle at higher RPMs -> Underpressure in the exhaust...if the cats were damaged before by excessive fuel / rich mixture it can suck in parts of the ceramic cat. Why should a warranty on the engine cover such failure ?
Who's to say that the cat didn't destruct as a result of the not inconsiderable forces sucking down the exhaust while the engine blew itself up?
I've not heard of m(any) Sp6 engines sucking bits of their cats into the engine.
Is this a common event?
Should all Sp6 owners have the cats replaced after a certain time?
Edited by rfisher on Tuesday 11th February 17:45
rfisher said:
Is this a common event?
No, it's fortunately not a common event, but it can happen. It happened on newer Aston Martin V12 Engines too...But what happens to the Speed6 Engine very often is a rich mixture or fuel into the exhaust, because the MBE is not very sophisticated. And then the Cats will be destroyed. A solution would be cat replacements or, as far as i know, metallic cats. Maybe speaking to Dom would clarify ?
glow worm said:
I thought they are metallic , at least my melted one looked metallic
They are indeed metallic!Edited by glow worm on Wednesday 12th February 09:02
The matrix is made primarily of Platinum.....This explains why there has been a surge of cat' thefts in various areas, where the catalysts fetch a good price on the scrap metal market.
….All those pops and bangs we like to hear, CAN blow out the matrix....It's a mini explosion caused by unburnt fuel being ignited by a hot catalyst. The detritus can be sucked back into the engine.
Nick
The melted cat was off the Sagaris I used to own. The cats were taken off when I bought the car as 2nd owner , it had only covered 7,000 miles in 9 years . My TVR guru thought the most likely culprit was the MOT testing station , revving the car to get it up to temperature quickly for the emission tests.
Welcome to the high mileage club.
And the daily driver club.
Sadly I had to relinquish my membership of the latter 3 or 4 years ago when I bought a little run around to cope better with the almost permanent traffic jams on and within the M25. I did 20 years of driving a TVR as my only car prior to that.
Still a member of the high mileage club though.
And the daily driver club.
Sadly I had to relinquish my membership of the latter 3 or 4 years ago when I bought a little run around to cope better with the almost permanent traffic jams on and within the M25. I did 20 years of driving a TVR as my only car prior to that.
Still a member of the high mileage club though.
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