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Registered
Join Date: Jul 2006
Location: Portland Oregon
Posts: 224
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Emissions DEQ test....Question
To register this '76 911S/3.0SC I have to pass the obligatory DEQ emmissions test.
I'm dreading it. So I'd like members opinions on what grade of gas to use durning the test only. (both work fine in my car but premium is funner). My gut tells me that regular 87octane would burn faster and more completely. Wonder if that's good? If there is a little oil in the combustion chamber (and we all have that) maybe slower burning 92octane would take care of it better. Any experiences out there? Peace |
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08-15-2006, 05:06 PM
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Registered
Join Date: Dec 1999
Location: Novato, CA
Posts: 4,740
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Good idea to lean it out before the test.
The octane is a waste of time. Cheers, Joe |
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08-16-2006, 04:21 AM
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Still Doin Time
Join Date: Nov 2004
Location: Nokesville, Va.
Posts: 8,225
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You are correct the lower the octane number. The better chances are you'll pass because the flame is slower in time + burns at a higher temp making for more complete combustion IF the engine can handle it.
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'15 Dodge - 'Dango R/T Hauls groceries and Kinda Hauls *ss '07 Jeep SRT-8 - Hauls groceries and Hauls *ss Sold '85 Guards Red Targa - Almost finished after 17 years '95 Road King w/117ci - No time to ride, see above '77 Sportster Pro-Street Drag Bike w/93ci - Sold |
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08-16-2006, 12:46 PM
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Registered
Join Date: Jul 2006
Location: Portland Oregon
Posts: 224
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Well actually regular gas burns faster than premium. The higher the octane the slower the burn.
That's why older performance engines with high compression won't run well on regular. You need to retard the spark or you get predetonation. Regular just pops off too soon. It can cause overheating. Which might be good for an E test. More heat equals fewer emmissions.
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'76 911S w/ '79 3.0 SC engine. Irish Green |
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08-16-2006, 05:50 PM
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