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Registered
Join Date: Mar 2001
Posts: 14
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'87 Euro - Is leaded gas essential?
Hi
They are discontinuing leaded fuel here in a month. I've got the Euro engine (10.5 versus 9.3 compression ratio if memory serves) and it has never had a cat. Do I need to buy a lead additive or are the valves the same as for the cat version and thus don't care about lead provided that detonation can be avoided? Thanks |
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12-27-2002, 09:18 AM
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RETIRED
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Nope....never needed it in mine.....an 83SC euro....
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12-27-2002, 09:20 AM
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Registered
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No, all 911's back to the early seventies will be quite happy on UL
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12-27-2002, 12:34 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,492
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There hasn't been a problem with soft valve seats since the late 60's/early 70's I think.
If they could/would make two different styles of head (different materials for the seats) it would have cost Porsche more to make two different types of head than it would to just one.
__________________
Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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12-27-2002, 12:39 PM
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Registered
Join Date: Nov 2002
Posts: 1,955
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Bruce Anderson once listed the Rockwell hardness rating for the various valves and valve seats on Porsches. From what I recall, if they are under a certain number, then unleaded would be necessary.
I remember even the earliest 914s were good enough for unleaded. I think all of the 911s were, too - certainly everything from 1970 on. In fact, I think even some of the later 356s were ok, too. |
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12-27-2002, 01:13 PM
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Da cab
